API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Mar 05, 2024 Clementine Extended Spacecraft -40000 https://science.nasa.gov/mission/clementine/ BACKGROUND Deep Space Program Science Experiment (DSPSE), better known as Clementine, was launched 1994-Jan-25 @ 16:34 UTC from Vandenberg Air Force Base (SLC-4W), California on a Titan 2G launch vehicle. After launch, the spacecraft remained in a temporary parking orbit around the Earth until Feb. 3, 1994, at which time a solid-propellant rocket sent the vehicle to the Moon. After two Earth flybys, Feb. 5 and Feb. 15, Clementine successfully entered an elliptical polar orbit (about 430 x 2950 kilometers) around the Moon on Feb. 19, 1994, with a period of five days. The BMDO assigned responsibility for spacecraft design, manufacture, integration, and mission execution to the Naval Research Laboratory (NRL). The Lawrence Livermore National Laboratory (LLNL) provided lightweight imaging sensors developed under the sponsorship of BMDO. MISSION Its purpose was to map the Moon and test lightweight sensors and spacecraft components by exposing them to the environment of outer space. Between February 26 and April 22, 1994, Clementine returned more than 1.8 million digital images of the Moon. Review of Clementine data indicated the possible existence of ice within some of the moon's craters (South Pole). This discovery was confirmed in early 1998 by NASA's Lunar Prospector. It departed Lunar orbit 1994-May-03 to rendevous with near-Earth asteroid 1620 Geographos, but an 11-minute thruster malfunction on May 7, 1994 caused spin-up to 80 rpm while depleting the fuel supply. The mission was terminated 1994-Aug-8, the spacecraft left in heliocentric space. The next year, when antenna geometry was expected to be more favorable, a search succesfully re-established contact with the spacecraft. It was tracked for about a month while thruster tests were conducted. LATER TRAJECTORY ANALYSIS OD performed in 2024 (M. Ryne, JPL) fit the 1995 post-recovery data, spanning about one month with a very sparse S-band Doppler tracking data set (cs0205, 401 F1 Doppler, 292 F2 Doppler, spanning 1995-Apr-10 to 1995-May-11). The dynamic model used a solar pressure bus model and two small impulsive burns in the fit. The runout trajectory initializes with a state taken a few days after the last of tracking data in the cs0205 solution. The propagation used a spherical solar pressure model with an average diffuse reflectivity coefficient. The original fit used a DE200 planetary ephemeris and the runout uses DE421. No effort was made to correct this mismatch. Earth approaches potentially within 4.2E6 km (11 LD) in 2040-Oct and 3.9E6 km (10 LD) in 2058-Jul are indicated. TRAJECTORY This trajectory is the 2024 post-recovery fit and extension: Trajectory name Start (TDB) Stop (TDB) ------------------------------------ ----------------- ----------------- clem_19950515_21250515_cs0502_runout 1995-May-15 00:00 2125-May-15 12:00 Also online (SCID -40) is a corrected version of NRL release for the 1994 lunar orbit insertion and mapping phases covering 1994-Feb-19 to 19940-May-30. Other segments off-line: LEO & PHASING LOOP A: 1994-Jan-26 00:01 to 1994-Feb-02 13:01 DEPARTURE & PHASING LOOP B: 1994-May-04 03:31 to 1994-May-06 13:31 See the above web page for details on the Clementine mission. ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Wed Sep 16 11:11:03 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Clementine Extended (spacecraft) (-40000) {source: clem_19950515_21250515_c} Center body name: Earth (399) {source: DE441} Center-site name: El Berrueco ******************************************************************************* Start time : A.D. 2026-Sep-02 00:00:00.0000 UT Stop time : A.D. 2026-Sep-05 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 356.4134, 40.8833094, 1.06361 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 356.4134,4829.88693,4153.33056 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Earth Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian RTS-only print : NO EOP file : eop.260915.p261212 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-15. PREDICTS-> 2026-DEC-11 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation ( 0.0deg=YES),Airmass (>38.000=NO), Daylight (YES) Table cut-offs 2: Solar elongation ( 12.0,180.0=YES),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) *************************************************************************************************************************************************************************************************************************************************** Date__(UT)__HR:MN R.A._____(ICRF)_____DEC Azi____(a-app)___Elev APmag S-brt r rdot delta deldot S-O-T /r S-T-O T-O-M/MN_Illu% RA_3sigma DEC_3sigma Sky_motion Sky_mot_PA RelVel-ANG *************************************************************************************************************************************************************************************************************************************************** $$SOE >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-02 19:00 C 17 09 13.03 -23 35 57.1 185.716107 25.270002 n.a. n.a. 1.027120202319 -0.1353002 0.09504759636636 0.4059683 98.4302 /T 76.3176 151.4/ 67.1109 n.a. n.a. 2.2756455 94.293284 8.8268339 2026-Sep-02 19:10 C 17 09 14.68 -23 35 58.9 188.233563 25.039999 n.a. n.a. 1.027119659803 -0.1352309 0.09504925293350 0.4200029 98.4298 /T 76.3179 151.6/ 67.0158 n.a. n.a. 2.2769268 94.153628 9.1216982 2026-Sep-02 19:20 N 17 09 16.33 -23 36 00.5 190.734695 24.728089 n.a. n.a. 1.027119117565 -0.1351617 0.09505096563010 0.4339507 98.4294 /T 76.3182 151.7/ 66.9212 n.a. n.a. 2.2787987 94.013945 9.4114825 2026-Sep-02 19:30 N 17 09 17.98 -23 36 02.2 193.214935 24.335472 n.a. n.a. 1.027118575604 -0.1350924 0.09505273405482 0.4477852 98.4290 /T 76.3185 151.8/ 66.8270 n.a. n.a. 2.2812578 93.874601 9.6954372 2026-Sep-02 19:40 N 17 09 19.64 -23 36 03.8 195.670034 23.863626 n.a. n.a. 1.027118033922 -0.1350231 0.09505455770098 0.4614804 98.4285 /T 76.3188 151.9/ 66.7334 n.a. n.a. 2.2842993 93.735959 9.9728413 2026-Sep-02 19:50 A 17 09 21.30 -23 36 05.3 198.096121 23.314282 n.a. n.a. 1.027117492517 -0.1349539 0.09505643595759 0.4750103 98.4281 /T 76.3191 152.0/ 66.6403 n.a. n.a. 2.2879174 93.598379 10.243006 2026-Sep-02 20:00 A 17 09 22.96 -23 36 06.8 200.489738 22.689393 n.a. n.a. 1.027116951391 -0.1348846 0.09505836811049 0.4883495 98.4277 /T 76.3194 152.1/ 66.5479 n.a. n.a. 2.2921049 93.462214 10.505277 2026-Sep-02 20:10 A 17 09 24.63 -23 36 08.2 202.847868 21.991110 n.a. n.a. 1.027116410542 -0.1348153 0.09506035334371 0.5014726 98.4274 /T 76.3197 152.2/ 66.4560 n.a. n.a. 2.2968536 93.327808 10.759038 2026-Sep-02 20:20 A 17 09 26.30 -23 36 09.5 205.167954 21.221741 n.a. n.a. 1.027115869971 -0.1347460 0.09506239074104 0.5143550 98.4270 /T 76.3200 152.3/ 66.3649 n.a. n.a. 2.3021540 93.195495 11.003711 2026-Sep-02 20:30 17 09 27.97 -23 36 10.9 207.447898 20.383725 n.a. n.a. 1.027115329678 -0.1346768 0.09506447928780 0.5269723 98.4266 /T 76.3202 152.4/ 66.2744 n.a. n.a. 2.3079957 93.065600 11.238761 2026-Sep-02 20:40 17 09 29.65 -23 36 12.1 209.686059 19.479602 n.a. n.a. 1.027114789663 -0.1346075 0.09506661787270 0.5393007 98.4263 /T 76.3204 152.6/ 66.1847 n.a. n.a. 2.3143670 92.938434 11.463693 2026-Sep-02 20:50 17 09 31.34 -23 36 13.4 211.881234 18.511977 n.a. n.a. 1.027114249925 -0.1345382 0.09506880529004 0.5513169 98.4259 /T 76.3206 152.7/ 66.0957 n.a. n.a. 2.3212551 92.814295 11.678058 2026-Sep-02 21:00 17 09 33.03 -23 36 14.6 214.032638 17.483502 n.a. n.a. 1.027113710466 -0.1344689 0.09507104024203 0.5629983 98.4256 /T 76.3208 152.8/ 66.0075 n.a. n.a. 2.3286463 92.693465 11.881448 2026-Sep-02 21:10 m 17 09 34.72 -23 36 15.7 216.139877 16.396844 n.a. n.a. 1.027113171284 -0.1343996 0.09507332134111 0.5743228 98.4253 /T 76.3210 152.9/ 65.9201 n.a. n.a. 2.3365258 92.576214 12.073501 2026-Sep-02 21:20 m 17 09 36.42 -23 36 16.8 218.202917 15.254665 n.a. n.a. 1.027112632381 -0.1343303 0.09507564711286 0.5852690 98.4250 /T 76.3211 153.0/ 65.8336 n.a. n.a. 2.3448779 92.462791 12.253899 2026-Sep-02 21:30 m 17 09 38.13 -23 36 17.8 220.222048 14.059604 n.a. n.a. 1.027112093755 -0.1342611 0.09507801599854 0.5958165 98.4248 /T 76.3213 153.1/ 65.7479 n.a. n.a. 2.3536859 92.353433 12.422367 2026-Sep-02 21:40 m 17 09 39.84 -23 36 18.8 222.197855 12.814261 n.a. n.a. 1.027111555407 -0.1341918 0.09508042635827 0.6059452 98.4245 /T 76.3214 153.2/ 65.6631 n.a. n.a. 2.3629322 92.248354 12.578672 2026-Sep-02 21:50 m 17 09 41.56 -23 36 19.8 224.131181 11.521183 n.a. n.a. 1.027111017337 -0.1341225 0.09508287647403 0.6156362 98.4243 /T 76.3214 153.3/ 65.5793 n.a. n.a. 2.3725983 92.147756 12.722623 2026-Sep-02 22:00 m 17 09 43.29 -23 36 20.8 226.023096 10.182851 n.a. n.a. 1.027110479545 -0.1340532 0.09508536455302 0.6248712 98.4241 /T 76.3215 153.4/ 65.4963 n.a. n.a. 2.3826652 92.051818 12.854071 2026-Sep-02 22:10 m 17 09 45.03 -23 36 21.7 227.874868 8.801676 n.a. n.a. 1.027109942031 -0.1339839 0.09508788873103 0.6336328 98.4240 /T 76.3215 153.5/ 65.4143 n.a. n.a. 2.3931128 91.960705 12.972904 2026-Sep-02 22:20 m 17 09 46.77 -23 36 22.5 229.687933 7.379988 n.a. n.a. 1.027109404795 -0.1339146 0.09509044707601 0.6419046 98.4238 /T 76.3215 153.6/ 65.3333 n.a. n.a. 2.4039204 91.874560 13.079049 2026-Sep-02 22:30 m 17 09 48.52 -23 36 23.4 231.463874 5.920036 n.a. n.a. 1.027108867837 -0.1338453 0.09509303759178 0.6496710 98.4237 /T 76.3214 153.7/ 65.2532 n.a. n.a. 2.4150667 91.793512 13.172469 2026-Sep-02 22:40 m 17 09 50.29 -23 36 24.2 233.204394 4.423985 n.a. n.a. 1.027108331157 -0.1337760 0.09509565822178 0.6569175 98.4236 /T 76.3214 153.7/ 65.1742 n.a. n.a. 2.4265297 91.717668 13.253160 2026-Sep-02 22:50 m 17 09 52.05 -23 36 25.0 234.911302 2.893910 n.a. n.a. 1.027107794755 -0.1337067 0.09509830685303 0.6636306 98.4236 /T 76.3213 153.8/ 65.0961 n.a. n.a. 2.4382868 91.647122 13.321152 2026-Sep-02 23:00 m 17 09 53.83 -23 36 25.7 236.586493 1.331803 n.a. n.a. 1.027107258631 -0.1336374 0.09510098132016 0.6697976 98.4236 /T 76.3211 153.9/ 65.0191 n.a. n.a. 2.4503150 91.581949 13.376502 2026-Sep-02 23:10 m 17 09 55.62 -23 36 26.4 238.231940 -0.260428 n.a. n.a. 1.027106722785 -0.1335680 0.09510367940953 0.6754070 98.4236 /T 76.3210 154.0/ 64.9430 n.a. n.a. 2.4625908 91.522206 13.419300 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-03 18:50 C 17 13 41.57 -23 40 14.7 183.041199 25.353874 n.a. n.a. 1.027045446960 -0.1253747 0.09526650379888 0.4062682 98.4962 /T 76.2400 164.0/ 56.2512 n.a. n.a. 2.2853033 93.937017 8.7766200 2026-Sep-03 19:00 C 17 13 43.23 -23 40 16.3 185.567840 25.211571 n.a. n.a. 1.027044944253 -0.1253052 0.09526816168085 0.4203633 98.4958 /T 76.2403 164.1/ 56.1465 n.a. n.a. 2.2860052 93.798473 9.0732079 2026-Sep-03 19:10 C 17 13 44.89 -23 40 17.9 188.083305 24.986512 n.a. n.a. 1.027044441825 -0.1252356 0.09526987599126 0.4343996 98.4954 /T 76.2406 164.3/ 56.0422 n.a. n.a. 2.2872987 93.659649 9.3654832 2026-Sep-03 19:20 N 17 13 46.56 -23 40 19.4 190.582768 24.679577 n.a. n.a. 1.027043939676 -0.1251661 0.09527164644102 0.4483506 98.4950 /T 76.2409 164.4/ 55.9382 n.a. n.a. 2.2891817 93.520912 9.6526801 2026-Sep-03 19:30 N 17 13 48.22 -23 40 20.8 193.061658 24.291944 n.a. n.a. 1.027043437806 -0.1250965 0.09527347263500 0.4621900 98.4946 /T 76.2412 164.5/ 55.8345 n.a. n.a. 2.2916505 93.382623 9.9340586 2026-Sep-03 19:40 N 17 13 49.89 -23 40 22.2 195.515721 23.825071 n.a. n.a. 1.027042936215 -0.1250269 0.09527535407275 0.4758915 98.4942 /T 76.2414 164.6/ 55.7313 n.a. n.a. 2.2947004 93.245145 10.208907 2026-Sep-03 19:50 A 17 13 51.55 -23 40 23.5 197.941073 23.280671 n.a. n.a. 1.027042434904 -0.1249574 0.09527729014958 0.4894293 98.4939 /T 76.2417 164.7/ 55.6286 n.a. n.a. 2.2983254 93.108830 10.476545 2026-Sep-03 20:00 A 17 13 53.23 -23 40 24.8 200.334239 22.660680 n.a. n.a. 1.027041933871 -0.1248878 0.09527928015750 0.5027779 98.4935 /T 76.2420 164.8/ 55.5264 n.a. n.a. 2.3025185 92.974027 10.736329 2026-Sep-03 20:10 A 17 13 54.90 -23 40 26.1 202.692184 21.967229 n.a. n.a. 1.027041433117 -0.1248182 0.09528132328676 0.5159121 98.4931 /T 76.2422 165.0/ 55.4247 n.a. n.a. 2.3072713 92.841076 10.987649 2026-Sep-03 20:20 17 13 56.58 -23 40 27.2 205.012328 21.202615 n.a. n.a. 1.027040932642 -0.1247487 0.09528341862734 0.5288070 98.4928 /T 76.2424 165.1/ 55.3236 n.a. n.a. 2.3125744 92.710307 11.229936 2026-Sep-03 20:30 17 13 58.26 -23 40 28.4 207.292551 20.369262 n.a. n.a. 1.027040432447 -0.1246791 0.09528556517067 0.5414383 98.4924 /T 76.2426 165.2/ 55.2232 n.a. n.a. 2.3184171 92.582037 11.462663 2026-Sep-03 20:40 17 13 59.95 -23 40 29.5 209.531185 19.469697 n.a. n.a. 1.027039932530 -0.1246095 0.09528776181151 0.5537823 98.4921 /T 76.2428 165.3/ 55.1234 n.a. n.a. 2.3247880 92.456573 11.685341 2026-Sep-03 20:50 17 14 01.65 -23 40 30.5 211.727003 18.506518 n.a. n.a. 1.027039432893 -0.1245399 0.09529000735017 0.5658155 98.4918 /T 76.2430 165.4/ 55.0243 n.a. n.a. 2.3316741 92.334208 11.897529 2026-Sep-03 21:00 17 14 03.34 -23 40 31.5 213.879194 17.482367 n.a. n.a. 1.027038933535 -0.1244704 0.09529230049475 0.5775154 98.4915 /T 76.2432 165.5/ 54.9260 n.a. n.a. 2.3390618 92.215218 12.098824 2026-Sep-03 21:10 17 14 05.05 -23 40 32.4 215.987338 16.399905 n.a. n.a. 1.027038434455 -0.1244008 0.09529463986358 0.5888598 98.4912 /T 76.2433 165.6/ 54.8285 n.a. n.a. 2.3469363 92.099866 12.288870 2026-Sep-03 21:20 17 14 06.76 -23 40 33.3 218.051377 15.261788 n.a. n.a. 1.027037935655 -0.1243312 0.09529702398786 0.5998275 98.4910 /T 76.2434 165.7/ 54.7317 n.a. n.a. 2.3552818 91.988397 12.467354 2026-Sep-03 21:30 17 14 08.48 -23 40 34.2 220.071578 14.070654 n.a. n.a. 1.027037437134 -0.1242616 0.09529945131447 0.6103977 98.4907 /T 76.2435 165.8/ 54.6358 n.a. n.a. 2.3640816 91.881041 12.634003 2026-Sep-03 21:40 17 14 10.20 -23 40 35.0 222.048502 12.829098 n.a. n.a. 1.027036938892 -0.1241920 0.09530192020903 0.6205505 98.4905 /T 76.2436 165.9/ 54.5408 n.a. n.a. 2.3733183 91.778007 12.788591 2026-Sep-03 21:50 m 17 14 11.93 -23 40 35.8 223.982974 11.539666 n.a. n.a. 1.027036440929 -0.1241224 0.09530442895885 0.6302668 98.4903 /T 76.2437 166.0/ 54.4467 n.a. n.a. 2.3829733 91.679491 12.930928 2026-Sep-03 22:00 m 17 14 13.67 -23 40 36.6 225.876042 10.204839 n.a. n.a. 1.027035943246 -0.1240528 0.09530697577628 0.6395285 98.4902 /T 76.2437 166.1/ 54.3535 n.a. n.a. 2.3930277 91.585667 13.060868 2026-Sep-03 22:10 m 17 14 15.41 -23 40 37.3 227.728958 8.827029 n.a. n.a. 1.027035445841 -0.1239832 0.09530955880213 0.6483180 98.4900 /T 76.2437 166.2/ 54.2613 n.a. n.a. 2.4034613 91.496692 13.178301 2026-Sep-03 22:20 m 17 14 17.16 -23 40 37.9 229.543142 7.408566 n.a. n.a. 1.027034948716 -0.1239136 0.09531217610925 0.6566188 98.4899 /T 76.2436 166.3/ 54.1700 n.a. n.a. 2.4142535 91.412708 13.283156 2026-Sep-03 22:30 m 17 14 18.92 -23 40 38.6 231.320161 5.951703 n.a. n.a. 1.027034451869 -0.1238441 0.09531482570609 0.6644155 98.4898 /T 76.2436 166.4/ 54.0798 n.a. n.a. 2.4253831 91.333834 13.375396 2026-Sep-03 22:40 m 17 14 20.69 -23 40 39.2 233.061704 4.458603 n.a. n.a. 1.027033955302 -0.1237745 0.09531750554061 0.6716933 98.4898 /T 76.2435 166.5/ 53.9906 n.a. n.a. 2.4368280 91.260176 13.455018 2026-Sep-03 22:50 m 17 14 22.47 -23 40 39.8 234.769568 2.931348 n.a. n.a. 1.027033459014 -0.1237048 0.09532021350412 0.6784387 98.4898 /T 76.2433 166.6/ 53.9024 n.a. n.a. 2.4485659 91.191820 13.522050 2026-Sep-03 23:00 m 17 14 24.26 -23 40 40.4 236.445637 1.371930 n.a. n.a. 1.027032963005 -0.1236352 0.09532294743534 0.6846391 98.4898 /T 76.2432 166.7/ 53.8153 n.a. n.a. 2.4605737 91.128837 13.576553 2026-Sep-03 23:10 m 17 14 26.05 -23 40 40.9 238.091872 -0.217741 n.a. n.a. 1.027032467276 -0.1235656 0.09532570512452 0.6902829 98.4898 /T 76.2430 166.8/ 53.7293 n.a. n.a. 2.4728280 91.071281 13.618612 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-04 18:50 C 17 18 13.08 -23 44 06.3 182.890406 25.298210 n.a. n.a. 1.026975933338 -0.1153386 0.09549599743294 0.4213410 98.5651 /T 76.1589 175.7/ 44.8653 n.a. n.a. 2.2959145 93.438823 9.0341229 2026-Sep-04 19:00 C 17 18 14.75 -23 44 07.8 185.415049 25.160956 n.a. n.a. 1.026975470884 -0.1152687 0.09549771577367 0.4354362 98.5648 /T 76.1592 175.8/ 44.7581 n.a. n.a. 2.2966292 93.301052 9.3280653 2026-Sep-04 19:10 N 17 18 16.42 -23 44 09.1 187.928840 24.940986 n.a. n.a. 1.026975008711 -0.1151989 0.09549949054617 0.4494741 98.5644 /T 76.1594 175.9/ 44.6511 n.a. n.a. 2.2979344 93.163118 9.6176877 2026-Sep-04 19:20 N 17 18 18.10 -23 44 10.4 190.426955 24.639160 n.a. n.a. 1.026974546817 -0.1151291 0.09550132146777 0.4634284 98.5640 /T 76.1597 176.0/ 44.5442 n.a. n.a. 2.2998276 93.025382 9.9022343 2026-Sep-04 19:30 N 17 18 19.77 -23 44 11.7 192.904819 24.256635 n.a. n.a. 1.026974085204 -0.1150592 0.09550320814975 0.4772725 98.5637 /T 76.1600 176.0/ 44.4376 n.a. n.a. 2.3023052 92.888203 10.180974 2026-Sep-04 19:40 N 17 18 21.44 -23 44 12.9 195.358168 23.794848 n.a. n.a. 1.026973623870 -0.1149894 0.09550515009817 0.4909805 98.5633 /T 76.1602 176.1/ 44.3313 n.a. n.a. 2.3053625 92.751938 10.453206 2026-Sep-04 19:50 A 17 18 23.12 -23 44 14.0 197.783105 23.255494 n.a. n.a. 1.026973162817 -0.1149196 0.09550714671466 0.5045264 98.5630 /T 76.1604 176.1/ 44.2252 n.a. n.a. 2.3089935 92.616937 10.718258 2026-Sep-04 20:00 A 17 18 24.80 -23 44 15.1 200.176137 22.640491 n.a. n.a. 1.026972702044 -0.1148497 0.09550919729772 0.5178846 98.5626 /T 76.1607 176.2/ 44.1196 n.a. n.a. 2.3131910 92.483543 10.975495 2026-Sep-04 20:10 A 17 18 26.49 -23 44 16.1 202.534209 21.951955 n.a. n.a. 1.026972241551 -0.1147799 0.09551130104394 0.5310300 98.5623 /T 76.1609 176.2/ 44.0143 n.a. n.a. 2.3179467 92.352090 11.224317 2026-Sep-04 20:20 17 18 28.18 -23 44 17.1 204.854718 21.192166 n.a. n.a. 1.026971781339 -0.1147100 0.09551345704962 0.5439377 98.5620 /T 76.1611 176.3/ 43.9095 n.a. n.a. 2.3232512 92.222905 11.464164 2026-Sep-04 20:30 17 18 29.87 -23 44 18.1 207.135519 20.363537 n.a. n.a. 1.026971321406 -0.1146402 0.09551566431245 0.5565834 98.5616 /T 76.1613 176.3/ 43.8052 n.a. n.a. 2.3290937 92.096299 11.694513 2026-Sep-04 20:40 17 18 31.57 -23 44 19.0 209.374918 19.468583 n.a. n.a. 1.026970861754 -0.1145703 0.09551792173347 0.5689432 98.5613 /T 76.1614 176.4/ 43.7015 n.a. n.a. 2.3354628 91.972573 11.914885 2026-Sep-04 20:50 17 18 33.27 -23 44 19.8 211.571662 18.509893 n.a. n.a. 1.026970402382 -0.1145005 0.09552022811906 0.5809939 98.5611 /T 76.1616 176.4/ 43.5983 n.a. n.a. 2.3423455 91.852014 12.124845 2026-Sep-04 21:00 17 18 34.98 -23 44 20.6 213.724913 17.490101 n.a. n.a. 1.026969943290 -0.1144306 0.09552258218336 0.5927126 98.5608 /T 76.1617 176.4/ 43.4958 n.a. n.a. 2.3497282 91.734894 12.323996 2026-Sep-04 21:10 17 18 36.69 -23 44 21.4 215.834227 16.411861 n.a. n.a. 1.026969484478 -0.1143607 0.09552498255062 0.6040774 98.5605 /T 76.1618 176.5/ 43.3939 n.a. n.a. 2.3575960 91.621468 12.511987 2026-Sep-04 21:20 17 18 38.41 -23 44 22.1 217.899519 15.277828 n.a. n.a. 1.026969025946 -0.1142909 0.09552742775788 0.6150669 98.5603 /T 76.1619 176.5/ 43.2927 n.a. n.a. 2.3659333 91.511977 12.688510 2026-Sep-04 21:30 17 18 40.13 -23 44 22.8 219.921034 14.090633 n.a. n.a. 1.026968567695 -0.1142210 0.09552991625770 0.6256602 98.5601 /T 76.1620 176.5/ 43.1922 n.a. n.a. 2.3747233 91.406643 12.853298 2026-Sep-04 21:40 17 18 41.87 -23 44 23.4 221.899311 12.852872 n.a. n.a. 1.026968109724 -0.1141512 0.09553244642126 0.6358376 98.5599 /T 76.1621 176.5/ 43.0925 n.a. n.a. 2.3839487 91.305672 13.006125 2026-Sep-04 21:50 17 18 43.61 -23 44 24.0 223.835153 11.567088 n.a. n.a. 1.026967652033 -0.1140813 0.09553501654121 0.6455798 98.5598 /T 76.1621 176.5/ 42.9937 n.a. n.a. 2.3935909 91.209253 13.146808 2026-Sep-04 22:00 17 18 45.35 -23 44 24.5 225.729591 10.235765 n.a. n.a. 1.026967194622 -0.1140114 0.09553762483520 0.6548686 98.5596 /T 76.1621 176.5/ 42.8957 n.a. n.a. 2.4036309 91.117554 13.275201 2026-Sep-04 22:10 17 18 47.11 -23 44 25.0 227.583858 8.861313 n.a. n.a. 1.026966737492 -0.1139416 0.09554026944912 0.6636865 98.5595 /T 76.1620 176.5/ 42.7985 n.a. n.a. 2.4140487 91.030728 13.391198 2026-Sep-04 22:20 17 18 48.87 -23 44 25.5 229.399360 7.446066 n.a. n.a. 1.026966280641 -0.1138717 0.09554294846070 0.6720170 98.5594 /T 76.1620 176.5/ 42.7023 n.a. n.a. 2.4248238 90.948909 13.494726 2026-Sep-04 22:30 17 18 50.64 -23 44 26.0 231.177646 5.992277 n.a. n.a. 1.026965824071 -0.1138018 0.09554565988307 0.6798444 98.5594 /T 76.1619 176.5/ 42.6070 n.a. n.a. 2.4359349 90.872215 13.585752 2026-Sep-04 22:40 m 17 18 52.42 -23 44 26.4 232.920396 4.502113 n.a. n.a. 1.026965367782 -0.1137319 0.09554840166871 0.6871541 98.5593 /T 76.1617 176.5/ 42.5127 n.a. n.a. 2.4473601 90.800742 13.664272 2026-Sep-04 22:50 m 17 18 54.20 -23 44 26.8 234.629392 2.977658 n.a. n.a. 1.026964911772 -0.1136621 0.09555117171323 0.6939324 98.5593 /T 76.1616 176.5/ 42.4193 n.a. n.a. 2.4590769 90.734575 13.730316 2026-Sep-04 23:00 m 17 18 56.00 -23 44 27.2 236.306509 1.420908 n.a. n.a. 1.026964456043 -0.1135922 0.09555396785943 0.7001667 98.5594 /T 76.1614 176.5/ 42.3270 n.a. n.a. 2.4710625 90.673778 13.783942 2026-Sep-04 23:10 m 17 18 57.80 -23 44 27.5 237.953695 -0.166224 n.a. n.a. 1.026964000594 -0.1135223 0.09555678790143 0.7058453 98.5594 /T 76.1612 176.4/ 42.2358 n.a. n.a. 2.4832935 90.618401 13.825235 >..... Elevation Cut-off Requested .....< $$EOE *************************************************************************************************************************************************************************************************************************************************** Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. SOLAR PRESENCE (OBSERVING SITE) Time tag is followed by a blank, then a solar-presence condition code: '*' Daylight (refracted solar upper-limb on or above apparent horizon) 'C' Civil twilight/dawn 'N' Nautical twilight/dawn 'A' Astronomical twilight/dawn ' ' Night OR geocentric ephemeris LUNAR PRESENCE WITH TARGET RISE/TRANSIT/SET EVENT MARKER (OBSERVING SITE) The solar-presence code column is immediately followed by another marker: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric The lunar presence marker (an ongoing state) can be over-ridden by a target event marker if an event has occurred since the last output step: 'r' Rise (target body on or went above cut-off RTS elevation) 'e' Elevation max (target body maximum elevation angle has occurred) 't' Transit (target body at or passed through observer meridian) 's' Set (target body on or went below cut-off RTS elevation) RTS MARKERS (TVH) Rise and set are with respect to the reference ellipsoid true visual horizon defined by the elevation cut-off angle. Horizon dip and yellow-light refraction (Earth only) are considered. Accuracy is < or = to twice the requested search step-size. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'Azi____(a-app)___Elev' = Airless apparent azimuth and elevation of target center. Compensated for light-time, the gravitational deflection of light, stellar aberration, precession and nutation. Azimuth is measured clockwise from north: North(0) -> East(90) -> South(180) -> West(270) -> North (360) Elevation angle is with respect to a plane perpendicular to the reference surface local zenith direction. TOPOCENTRIC ONLY. Units: DEGREES 'APmag S-brt' = The targets' approximate apparent visual magnitude and surface brightness. For planets and natural satellites, output is restricted to solar phase angles covered by observational data. Outside the observed phase angle range, "n.a." may be output to avoid extrapolation beyond the limit of model validity. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'S-T-O' = The Sun-Target-Observer angle; the interior vertex angle at target center formed by a vector from the target to the apparent center of the Sun (at reflection time on the target) and the apparent vector from target to the observer at print-time. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the down-leg from target to observer. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'RA_3sigma DEC_3sigma' = Uncertainty in Right-Ascension and Declination. Output values are the formal +/- 3 standard-deviations (sigmas) around nominal position. Units: ARCSECONDS 'Sky_motion Sky_mot_PA RelVel-ANG' = Total apparent angular rate of the target in the plane-of-sky. "Sky_mot_PA" is the position angle of the target's direction of motion in the plane-of-sky, measured counter-clockwise from the apparent of-date north pole direction. "RelVel-ANG" is the flight path angle of the target's relative motion with respect to the observer's line-of-sight, in the range [-90,+90], where positive values indicate motion away from the observer, negative values are toward the observer: -90 = target is moving directly toward the observer 0 = target is moving at right angles to the observer's line-of-sight +90 = target is moving directly away from the observer UNITS: ARCSECONDS/MINUTE, DEGREES, DEGREES Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Inquiries : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************