API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Nov 02, 2024 MMS-1 Spacecraft / (Earth) -140482 https://www.nasa.gov/mission_pages/mms/index.html MMS 1 Magnetospheric Multiscale (MMS) mission: the first of four identically instrumented space physics spacecraft studying the Earth's magnetosphere. Octagonal in shape; 2.5-m wide, 1.2-m high, spinning at 3 rpm during science operations. Eight deployable booms: four 60-meter wire booms, two 12.5 meter booms, two 5-m booms. Mass: 1250 kg; 318 W power generation; S-band communications. NOTE: The spacecraft may be maneuvered frequently. Therefore, the JSpOC TLE-based trajectory provided here may at times depart from the actual trajectory. This can happen because TLEs do not model thruster firings; the TLE trajectory solutions must be reinitialized after each event. Launched: 2015-Mar-13 02:44 UTC (Atlas V, Cape Canaveral, USA) ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun Nov 3 00:27:18 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-1 (spacecraft) (-140482) {source: MMS-1} Center body name: Earth (399) {source: DE441} Center-site name: Swan Reach Imaging, Glenalta ******************************************************************************* Start time : A.D. 2024-Oct-31 00:00:00.0000 UT Stop time : A.D. 2024-Nov-01 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 139.5701, -34.5440227, .056888 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 139.5701,5259.32258,-3596.34777 {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.241101.p250128 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-NOV-01. PREDICTS-> 2025-JAN-27 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 .....< 2024-Oct-31 09:20 C 21 26 34.64 -44 52 17.0 170.866559 79.624994 n.a. n.a. 0.992734822269 0.5750541 0.00052253440312 2.0479434 90.8758 /T 89.0945 101.9/ 1.3630 n.a. n.a. 126.21912 32.774074 68.729425 2024-Oct-31 09:30 C 21 27 37.47 -44 34 45.4 179.746821 80.069377 n.a. n.a. 0.992737116407 0.5738838 0.00053071004771 2.0315737 91.1490 /T 88.8208 102.1/ 1.3454 n.a. n.a. 123.81792 32.136011 68.645170 2024-Oct-31 09:40 Nt 21 28 37.80 -44 17 26.3 189.299070 80.211323 n.a. n.a. 0.992739405460 0.5725211 0.00053882188901 2.0160826 91.4155 /T 88.5538 102.3/ 1.3277 n.a. n.a. 121.60658 31.548786 68.551685 2024-Oct-31 09:50 N 21 29 35.85 -44 00 18.9 198.891703 80.030335 n.a. n.a. 0.992741688691 0.5709826 0.00054687333407 2.0014131 91.6759 /T 88.2930 102.5/ 1.3098 n.a. n.a. 119.56704 31.013246 68.449677 2024-Oct-31 10:00 N 21 30 31.85 -43 43 22.7 207.880206 79.536626 n.a. n.a. 0.992743965429 0.5692837 0.00055486756550 1.9875102 91.9307 /T 88.0377 102.7/ 1.2919 n.a. n.a. 117.68296 30.529968 68.339836 2024-Oct-31 10:10 A 21 31 26.00 -43 26 37.3 215.819975 78.765872 n.a. n.a. 0.992746235060 0.5674380 0.00056280754929 1.9743208 92.1804 /T 87.7875 102.9/ 1.2739 n.a. n.a. 115.93949 30.099261 68.222822 2024-Oct-31 10:20 A 21 32 18.48 -43 10 02.2 222.538252 77.765814 n.a. n.a. 0.992748497022 0.5654580 0.00057069604207 1.9617936 92.4255 /T 87.5420 103.1/ 1.2558 n.a. n.a. 114.32318 29.721187 68.099265 2024-Oct-31 10:30 A 21 33 09.47 -42 53 37.1 228.070189 76.583979 n.a. n.a. 0.992750750801 0.5633551 0.00057853559775 1.9498788 92.6665 /T 87.3005 103.3/ 1.2377 n.a. n.a. 112.82189 29.395571 67.969752 2024-Oct-31 10:40 A 21 33 59.12 -42 37 21.7 232.556559 75.261102 n.a. n.a. 0.992752995926 0.5611396 0.00058632857387 1.9385283 92.9037 /T 87.0628 103.4/ 1.2195 n.a. n.a. 111.42459 29.122018 67.834829 2024-Oct-31 10:50 21 34 47.58 -42 21 15.6 236.167816 73.829446 n.a. n.a. 0.992755231967 0.5588209 0.00059407713759 1.9276952 93.1376 /T 86.8285 103.6/ 1.2013 n.a. n.a. 110.12136 28.899936 67.694996 2024-Oct-31 11:00 21 35 34.99 -42 05 18.7 239.064907 72.313603 n.a. n.a. 0.992757458528 0.5564075 0.00060178327135 1.9173342 93.3685 /T 86.5971 103.8/ 1.1830 n.a. n.a. 108.90321 28.728553 67.550702 2024-Oct-31 11:10 21 36 21.48 -41 49 30.7 241.384904 70.732054 n.a. n.a. 0.992759675246 0.5539073 0.00060944877830 1.9074013 93.5968 /T 86.3685 104.0/ 1.1647 n.a. n.a. 107.76207 28.606935 67.402345 2024-Oct-31 11:20 21 37 07.16 -41 33 51.5 243.239017 69.098691 n.a. n.a. 0.992761881789 0.5513274 0.00061707528764 1.8978537 93.8227 /T 86.1422 104.1/ 1.1464 n.a. n.a. 106.69065 28.534009 67.250274 2024-Oct-31 11:30 21 37 52.15 -41 18 21.0 244.715487 67.424038 n.a. n.a. 0.992764077852 0.5486744 0.00062466425957 1.8886498 94.0465 /T 85.9179 104.3/ 1.1281 n.a. n.a. 105.68242 28.508575 67.094784 2024-Oct-31 11:40 21 38 36.54 -41 02 59.0 245.883730 65.716175 n.a. n.a. 0.992766263156 0.5459544 0.00063221699038 1.8797496 94.2685 /T 85.6955 104.4/ 1.1098 n.a. n.a. 104.73151 28.529331 66.936122 2024-Oct-31 11:50 21 39 20.44 -40 47 45.5 246.798301 63.981393 n.a. n.a. 0.992768437442 0.5431728 0.00063973461724 1.8711137 94.4890 /T 85.4746 104.6/ 1.0916 n.a. n.a. 103.83264 28.594882 66.774484 2024-Oct-31 12:00 21 40 03.92 -40 32 40.3 247.502211 62.224680 n.a. n.a. 0.992770600476 0.5403347 0.00064721812293 1.8627045 94.7081 /T 85.2550 104.7/ 1.0733 n.a. n.a. 102.98109 28.703760 66.610021 2024-Oct-31 12:10 21 40 47.07 -40 17 43.6 248.029547 60.450048 n.a. n.a. 0.992772752042 0.5374449 0.00065466834068 1.8544851 94.9261 /T 85.0366 104.9/ 1.0552 n.a. n.a. 102.17265 28.854433 66.442840 2024-Oct-31 12:20 21 41 29.97 -40 02 55.1 248.407503 58.660787 n.a. n.a. 0.992774891941 0.5345075 0.00066208595863 1.8464199 95.1432 /T 84.8190 105.0/ 1.0371 n.a. n.a. 101.40354 29.045318 66.273003 2024-Oct-31 12:30 21 42 12.68 -39 48 15.0 248.657914 56.859633 n.a. n.a. 0.992777019991 0.5315267 0.00066947152468 1.8384745 95.3596 /T 84.6023 105.2/ 1.0190 n.a. n.a. 100.67039 29.274795 66.100536 2024-Oct-31 12:40 21 42 55.26 -39 33 43.3 248.798439 55.048902 n.a. n.a. 0.992779136027 0.5285060 0.00067682545088 1.8306157 95.5754 /T 84.3861 105.3/ 1.0010 n.a. n.a. 99.970156 29.541212 65.925430 2024-Oct-31 12:50 21 43 37.78 -39 19 20.0 248.843445 53.230584 n.a. n.a. 0.992781239897 0.5254489 0.00068414801816 1.8228113 95.7907 /T 84.1703 105.5/ 0.9832 n.a. n.a. 99.300155 29.842898 65.747641 2024-Oct-31 13:00 21 44 20.28 -39 05 05.0 248.804694 51.406413 n.a. n.a. 0.992783331460 0.5223584 0.00069143938086 1.8150303 96.0058 /T 83.9549 105.6/ 0.9654 n.a. n.a. 98.657961 30.178166 65.567101 2024-Oct-31 13:10 21 45 02.82 -38 50 58.5 248.691864 49.577922 n.a. n.a. 0.992785410591 0.5192375 0.00069869957128 1.8072429 96.2206 /T 83.7396 105.7/ 0.9477 n.a. n.a. 98.041404 30.545324 65.383711 2024-Oct-31 13:20 21 45 45.44 -38 37 00.6 248.512958 47.746488 n.a. n.a. 0.992787477172 0.5160888 0.00070592850430 1.7994204 96.4354 /T 83.5244 105.9/ 0.9302 n.a. n.a. 97.448529 30.942678 65.197354 2024-Oct-31 13:30 21 46 28.18 -38 23 11.2 248.274617 45.913357 n.a. n.a. 0.992789531098 0.5129148 0.00071312598192 1.7915351 96.6503 /T 83.3092 106.0/ 0.9128 n.a. n.a. 96.877574 31.368539 65.007893 2024-Oct-31 13:40 21 47 11.08 -38 09 30.4 247.982372 44.079676 n.a. n.a. 0.992791572272 0.5097177 0.00072029169784 1.7835606 96.8652 /T 83.0938 106.2/ 0.8955 n.a. n.a. 96.326941 31.821228 64.815176 2024-Oct-31 13:50 21 47 54.16 -37 55 58.4 247.640833 42.246510 n.a. n.a. 0.992793600608 0.5064998 0.00072742524213 1.7754717 97.0804 /T 82.8783 106.3/ 0.8784 n.a. n.a. 95.795175 32.299078 64.619038 2024-Oct-31 14:00 21 48 37.46 -37 42 35.1 247.253852 40.414861 n.a. n.a. 0.992795616026 0.5032630 0.00073452610570 1.7672442 97.2958 /T 82.6625 106.4/ 0.8614 n.a. n.a. 95.280939 32.800440 64.419305 2024-Oct-31 14:10 21 49 21.01 -37 29 20.6 246.824654 38.585681 n.a. n.a. 0.992797618607 0.5000848 0.00074159392710 1.7589736 97.5115 /T 82.4463 106.6/ 0.8446 n.a. n.a. 94.790381 33.324207 64.215553 2024-Oct-31 14:20 21 50 04.82 -37 16 15.1 246.355925 36.759882 n.a. n.a. 0.992799608430 0.4968872 0.00074862821707 1.7505047 97.7277 /T 82.2298 106.7/ 0.8280 n.a. n.a. 94.314316 33.868184 64.007787 2024-Oct-31 14:30 21 50 48.93 -37 03 18.4 245.849885 34.938341 n.a. n.a. 0.992801585419 0.4936712 0.00075562813546 1.7418162 97.9442 /T 82.0129 106.8/ 0.8116 n.a. n.a. 93.851678 34.430798 63.795811 2024-Oct-31 14:40 21 51 33.34 -36 50 30.9 245.308360 33.121912 n.a. n.a. 0.992803549503 0.4904380 0.00076259276025 1.7328884 98.1612 /T 81.7955 107.0/ 0.7954 n.a. n.a. 93.401475 35.010506 63.579430 2024-Oct-31 14:50 21 52 18.06 -36 37 52.4 244.732846 31.311433 n.a. n.a. 0.992805500617 0.4871887 0.00076952109272 1.7237026 98.3787 /T 81.5777 107.1/ 0.7793 n.a. n.a. 92.962764 35.605800 63.358451 2024-Oct-31 15:00 21 53 03.12 -36 25 23.2 244.124546 29.507732 n.a. n.a. 0.992807438697 0.4839244 0.00077641206224 1.7142416 98.5967 /T 81.3593 107.2/ 0.7635 n.a. n.a. 92.534636 36.215206 63.132686 2024-Oct-31 15:10 21 53 48.51 -36 13 03.2 243.484410 27.711634 n.a. n.a. 0.992809363688 0.4806461 0.00078326453139 1.7044893 98.8151 /T 81.1405 107.4/ 0.7479 n.a. n.a. 92.116210 36.837288 62.901954 2024-Oct-31 15:20 21 54 34.25 -36 00 52.6 242.813165 25.923965 n.a. n.a. 0.992811275534 0.4773547 0.00079007730086 1.6944309 99.0341 /T 80.9212 107.5/ 0.7325 n.a. n.a. 91.706623 37.470649 62.666080 2024-Oct-31 15:30 21 55 20.33 -35 48 51.4 242.111339 24.145555 n.a. n.a. 0.992813174185 0.4740511 0.00079684911446 1.6840530 99.2535 /T 80.7014 107.6/ 0.7173 n.a. n.a. 91.305025 38.113932 62.424900 2024-Oct-31 15:40 21 56 06.77 -35 36 59.7 241.379288 22.377245 n.a. n.a. 0.992815059595 0.4707361 0.00080357866394 1.6733429 99.4734 /T 80.4811 107.8/ 0.7023 n.a. n.a. 90.910574 38.765822 62.178258 2024-Oct-31 15:50 21 56 53.55 -35 25 17.6 240.617205 20.619890 n.a. n.a. 0.992816931720 0.4674106 0.00081026459399 1.6622898 99.6938 /T 80.2604 107.9/ 0.6876 n.a. n.a. 90.522430 39.425047 61.926010 2024-Oct-31 16:00 21 57 40.68 -35 13 45.0 239.825145 18.874364 n.a. n.a. 0.992818790520 0.4640754 0.00081690550705 1.6508835 99.9146 /T 80.0392 108.0/ 0.6732 n.a. n.a. 90.139751 40.090378 61.668025 2024-Oct-31 16:10 21 58 28.16 -35 02 22.1 239.003030 17.141561 n.a. n.a. 0.992820635958 0.4607312 0.00082349996815 1.6391154 100.1358 /T 79.8176 108.2/ 0.6589 n.a. n.a. 89.761693 40.760635 61.404183 2024-Oct-31 16:20 21 59 15.98 -34 51 09.0 238.150667 15.422401 n.a. n.a. 0.992822467999 0.4573787 0.00083004650966 1.6269780 100.3575 /T 79.5957 108.3/ 0.6450 n.a. n.a. 89.387407 41.434680 61.134377 2024-Oct-31 16:30 22 00 04.13 -34 40 05.6 237.267754 13.717836 n.a. n.a. 0.992824286611 0.4540186 0.00083654363599 1.6144647 100.5794 /T 79.3734 108.4/ 0.6312 n.a. n.a. 89.016037 42.111423 60.858515 2024-Oct-31 16:40 22 00 52.60 -34 29 12.0 236.353889 12.028849 n.a. n.a. 0.992826091768 0.4506517 0.00084298982835 1.6015705 100.8016 /T 79.1508 108.6/ 0.6178 n.a. n.a. 88.646719 42.789821 60.576516 2024-Oct-31 16:50 22 01 41.39 -34 18 28.2 235.408581 10.356459 n.a. n.a. 0.992827883441 0.4472785 0.00084938354922 1.5882912 101.0241 /T 78.9280 108.7/ 0.6045 n.a. n.a. 88.278582 43.468876 60.288316 2024-Oct-31 17:00 22 02 30.49 -34 07 54.3 234.431255 8.701727 n.a. n.a. 0.992829661609 0.4438998 0.00085572324699 1.5746238 101.2468 /T 78.7050 108.9/ 0.5916 n.a. n.a. 87.910748 44.147640 59.993863 2024-Oct-31 17:10 22 03 19.88 -33 57 30.2 233.421260 7.065758 n.a. n.a. 0.992831426250 0.4405162 0.00086200736043 1.5605665 101.4697 /T 78.4818 109.0/ 0.5789 n.a. n.a. 87.542333 44.825207 59.693119 2024-Oct-31 17:20 22 04 09.55 -33 47 16.1 232.377876 5.449705 n.a. n.a. 0.992833177346 0.4371283 0.00086823432302 1.5461185 101.6927 /T 78.2585 109.1/ 0.5665 n.a. n.a. 87.172447 45.500722 59.386060 2024-Oct-31 17:30 22 04 59.48 -33 37 11.9 231.300322 3.854771 n.a. n.a. 0.992834914882 0.4337367 0.00087440256731 1.5312802 101.9157 /T 78.0352 109.3/ 0.5543 n.a. n.a. 86.800197 46.173371 59.072678 2024-Oct-31 17:40 22 05 49.67 -33 27 17.5 230.187761 2.282215 n.a. n.a. 0.992836638843 0.4303420 0.00088051052919 1.5160527 102.1386 /T 77.8119 109.4/ 0.5424 n.a. n.a. 86.424686 46.842386 58.752976 2024-Oct-31 17:50 22 06 40.09 -33 17 33.1 229.039313 0.733354 n.a. n.a. 0.992838349220 0.4269449 0.00088655665195 1.5004386 102.3615 /T 77.5887 109.5/ 0.5308 n.a. n.a. 86.045018 47.507045 58.426970 >..... 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************