API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Nov 02, 2024 MMS-2 Spacecraft / (Earth) -140483 https://www.nasa.gov/mission_pages/mms/index.html MMS 2 Magnetospheric Multiscale (MMS) mission: the second 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 Sat Nov 2 22:48:52 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-2 (spacecraft) (-140483) {source: MMS-2} 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 22 39.48 -45 26 15.7 175.017848 79.161374 n.a. n.a. 0.992727081277 0.5762821 0.00050710933287 2.1002272 90.0284 /T 89.9427 101.0/ 1.3630 n.a. n.a. 135.23279 34.090184 68.460668 2024-Oct-31 09:30 Ct 21 23 49.82 -45 07 47.0 183.429176 79.495739 n.a. n.a. 0.992729381209 0.5755257 0.00051549170301 2.0823985 90.3237 /T 89.6469 101.2/ 1.3454 n.a. n.a. 132.37605 33.442829 68.390749 2024-Oct-31 09:40 Ne 21 24 57.24 -44 49 33.2 192.271445 79.545815 n.a. n.a. 0.992731677637 0.5745397 0.00052380455591 2.0655156 90.6113 /T 89.3589 101.5/ 1.3277 n.a. n.a. 129.74412 32.844770 68.311076 2024-Oct-31 09:50 N 21 26 01.99 -44 31 33.4 201.017915 79.300167 n.a. n.a. 0.992733969682 0.5733444 0.00053205155884 2.0495169 90.8917 /T 89.0780 101.7/ 1.3098 n.a. n.a. 127.31555 32.296860 68.222353 2024-Oct-31 10:00 N 21 27 04.33 -44 13 47.1 209.172867 78.771761 n.a. n.a. 0.992736256545 0.5719584 0.00054023613706 2.0343433 91.1657 /T 88.8035 101.9/ 1.2919 n.a. n.a. 125.07097 31.799710 68.125265 2024-Oct-31 10:10 A 21 28 04.50 -43 56 13.6 216.406821 77.992450 n.a. n.a. 0.992738537497 0.5703982 0.00054836148318 2.0199379 91.4338 /T 88.5350 102.1/ 1.2739 n.a. n.a. 122.99288 31.353688 68.020473 2024-Oct-31 10:20 A 21 29 02.69 -43 38 52.4 222.591823 77.002800 n.a. n.a. 0.992740811872 0.5686789 0.00055643056587 2.0062458 91.6965 /T 88.2718 102.3/ 1.2558 n.a. n.a. 121.06545 30.958930 67.908608 2024-Oct-31 10:30 A 21 29 59.12 -43 21 43.1 227.753120 75.843188 n.a. n.a. 0.992743079060 0.5668140 0.00056444613796 1.9932143 91.9543 /T 88.0135 102.5/ 1.2377 n.a. n.a. 119.27442 30.615346 67.790263 2024-Oct-31 10:40 A 21 30 53.96 -43 04 45.2 231.998023 74.548871 n.a. n.a. 0.992745338505 0.5648160 0.00057241074398 1.9807922 92.2077 /T 87.7596 102.7/ 1.2195 n.a. n.a. 117.60689 30.322638 67.665992 2024-Oct-31 10:50 21 31 47.37 -42 47 58.3 235.461223 73.148497 n.a. n.a. 0.992747589698 0.5626961 0.00058032672716 1.9689302 92.4572 /T 87.5097 102.9/ 1.2013 n.a. n.a. 116.05122 30.080314 67.536303 2024-Oct-31 11:00 21 32 39.52 -42 31 22.2 238.274278 71.664492 n.a. n.a. 0.992749832171 0.5604645 0.00058819623612 1.9575806 92.7031 /T 87.2634 103.1/ 1.1830 n.a. n.a. 114.59691 29.887706 67.401661 2024-Oct-31 11:10 21 33 30.54 -42 14 56.5 240.552717 70.114137 n.a. n.a. 0.992752065496 0.5581305 0.00059602123127 1.9466972 92.9457 /T 87.0203 103.3/ 1.1647 n.a. n.a. 113.23451 29.743983 67.262480 2024-Oct-31 11:20 21 34 20.57 -41 58 41.1 242.392836 68.510713 n.a. n.a. 0.992754289282 0.5557026 0.00060380349075 1.9362353 93.1855 /T 86.7800 103.5/ 1.1464 n.a. n.a. 111.95550 29.648174 67.119128 2024-Oct-31 11:30 21 35 09.73 -41 42 35.7 243.872840 66.864479 n.a. n.a. 0.992756503169 0.5531886 0.00061154461624 1.9261517 93.4228 /T 86.5423 103.6/ 1.1281 n.a. n.a. 110.75221 29.599182 66.971920 2024-Oct-31 11:40 21 35 58.13 -41 26 40.2 245.055491 65.183440 n.a. n.a. 0.992758706828 0.5505957 0.00061924603863 1.9164043 93.6578 /T 86.3069 103.8/ 1.1098 n.a. n.a. 109.61776 29.595798 66.821127 2024-Oct-31 11:50 21 36 45.88 -41 10 54.4 245.990964 63.473921 n.a. n.a. 0.992760899955 0.5479303 0.00062690902346 1.9069527 93.8908 /T 86.0735 104.0/ 1.0916 n.a. n.a. 108.54595 29.636722 66.666970 2024-Oct-31 12:00 21 37 33.08 -40 55 18.2 246.719402 61.740989 n.a. n.a. 0.992763082274 0.5451985 0.00063453467608 1.8977575 94.1221 /T 85.8418 104.1/ 1.0733 n.a. n.a. 107.53122 29.720569 66.509624 2024-Oct-31 12:10 21 38 19.81 -40 39 51.5 247.273021 59.988762 n.a. n.a. 0.992765253530 0.5424057 0.00064212394695 1.8887808 94.3518 /T 85.6116 104.3/ 1.0552 n.a. n.a. 106.56859 29.845891 66.349223 2024-Oct-31 12:20 21 39 06.16 -40 24 34.3 247.677803 58.220641 n.a. n.a. 0.992767413491 0.5395571 0.00064967763668 1.8799858 94.5803 /T 85.3827 104.5/ 1.0371 n.a. n.a. 105.65359 30.011182 66.185858 2024-Oct-31 12:30 21 39 52.20 -40 09 26.4 247.954812 56.439472 n.a. n.a. 0.992769561942 0.5366573 0.00065719640099 1.8713369 94.8077 /T 85.1548 104.6/ 1.0190 n.a. n.a. 104.78219 30.214892 66.019583 2024-Oct-31 12:40 21 40 38.01 -39 54 28.0 248.121221 54.647674 n.a. n.a. 0.992771698687 0.5337106 0.00066468075573 1.8628001 95.0342 /T 84.9280 104.8/ 1.0010 n.a. n.a. 103.95079 30.455437 65.850414 2024-Oct-31 12:50 21 41 23.64 -39 39 38.9 248.191106 52.847332 n.a. n.a. 0.992773823548 0.5307209 0.00067213108170 1.8543421 95.2599 /T 84.7018 104.9/ 0.9832 n.a. n.a. 103.15617 30.731207 65.678340 2024-Oct-31 13:00 21 42 09.16 -39 24 59.1 248.176066 51.040269 n.a. n.a. 0.992775936360 0.5276920 0.00067954762949 1.8459311 95.4850 /T 84.4763 105.1/ 0.9654 n.a. n.a. 102.39540 31.040572 65.503315 2024-Oct-31 13:10 21 42 54.62 -39 10 28.7 248.085700 49.228096 n.a. n.a. 0.992778036973 0.5246273 0.00068693052438 1.8375364 95.7097 /T 84.2512 105.2/ 0.9477 n.a. n.a. 101.66588 31.381893 65.325271 2024-Oct-31 13:20 21 43 40.07 -38 56 07.7 247.927988 47.412260 n.a. n.a. 0.992780125251 0.5215298 0.00069427977100 1.8291286 95.9340 /T 84.0264 105.4/ 0.9302 n.a. n.a. 100.96523 31.753526 65.144117 2024-Oct-31 13:30 21 44 25.56 -38 41 56.1 247.709583 45.594072 n.a. n.a. 0.992782201069 0.5184024 0.00070159525822 1.8206793 96.1581 /T 83.8019 105.5/ 0.9128 n.a. n.a. 100.29133 32.153825 64.959742 2024-Oct-31 13:40 21 45 11.12 -38 27 53.9 247.436050 43.774737 n.a. n.a. 0.992784264313 0.5152479 0.00070887676378 1.8121616 96.3821 /T 83.5776 105.7/ 0.8955 n.a. n.a. 99.642213 32.581155 64.772018 2024-Oct-31 13:50 21 45 56.79 -38 14 01.1 247.112050 41.955371 n.a. n.a. 0.992786314880 0.5120686 0.00071612395912 1.8035493 96.6060 /T 83.3533 105.8/ 0.8784 n.a. n.a. 99.016121 33.033886 64.580805 2024-Oct-31 14:00 21 46 42.60 -38 00 17.9 246.741489 40.137022 n.a. n.a. 0.992788352675 0.5088670 0.00072333641406 1.7948179 96.8300 /T 83.1289 105.9/ 0.8614 n.a. n.a. 98.411424 33.510407 64.385951 2024-Oct-31 14:10 21 47 28.58 -37 46 44.3 246.327653 38.320685 n.a. n.a. 0.992790377747 0.5057109 0.00073051380040 1.7860405 97.0540 /T 82.9045 106.1/ 0.8446 n.a. n.a. 97.833261 34.009610 64.186985 2024-Oct-31 14:20 21 48 14.77 -37 33 20.2 245.873288 36.507310 n.a. n.a. 0.992792390144 0.5025330 0.00073765565840 1.7770826 97.2782 /T 82.6799 106.2/ 0.8280 n.a. n.a. 97.273019 34.529393 63.983975 2024-Oct-31 14:30 21 49 01.17 -37 20 05.7 245.380673 34.697809 n.a. n.a. 0.992794389780 0.4993347 0.00074476121853 1.7679224 97.5026 /T 82.4551 106.4/ 0.8116 n.a. n.a. 96.729409 35.068209 63.776746 2024-Oct-31 14:40 21 49 47.82 -37 07 00.9 244.851696 32.893067 n.a. n.a. 0.992796376578 0.4961173 0.00075182962769 1.7585399 97.7273 /T 82.2300 106.5/ 0.7954 n.a. n.a. 96.201236 35.624540 63.565120 2024-Oct-31 14:50 21 50 34.72 -36 54 05.9 244.287907 31.093951 n.a. n.a. 0.992798350464 0.4928824 0.00075885995418 1.7489159 97.9522 /T 82.0047 106.7/ 0.7793 n.a. n.a. 95.687366 36.196897 63.348922 2024-Oct-31 15:00 21 51 21.90 -36 41 20.7 243.690564 29.301318 n.a. n.a. 0.992800311372 0.4896312 0.00076585119277 1.7390328 98.1775 /T 81.7791 106.8/ 0.7635 n.a. n.a. 95.186717 36.783828 63.127979 2024-Oct-31 15:10 21 52 09.35 -36 28 45.3 243.060668 27.516014 n.a. n.a. 0.992802259239 0.4863648 0.00077280226977 1.7288741 98.4030 /T 81.5531 106.9/ 0.7479 n.a. n.a. 94.698245 37.383911 62.902125 2024-Oct-31 15:20 21 52 57.09 -36 16 19.8 242.398993 25.738890 n.a. n.a. 0.992804194006 0.4830845 0.00077971204796 1.7184247 98.6289 /T 81.3269 107.1/ 0.7325 n.a. n.a. 94.220940 37.995765 62.671199 2024-Oct-31 15:30 21 53 45.13 -36 04 04.2 241.706114 23.970795 n.a. n.a. 0.992806115620 0.4797912 0.00078657933167 1.7076705 98.8551 /T 81.1003 107.2/ 0.7173 n.a. n.a. 93.753814 38.618043 62.435050 2024-Oct-31 15:40 21 54 33.47 -35 51 58.7 240.982426 22.212591 n.a. n.a. 0.992808024032 0.4764859 0.00079340287164 1.6965987 99.0816 /T 80.8735 107.4/ 0.7023 n.a. n.a. 93.295898 39.249444 62.193534 2024-Oct-31 15:50 21 55 22.11 -35 40 03.2 240.228165 20.465151 n.a. n.a. 0.992809919197 0.4731697 0.00080018136999 1.6851980 99.3084 /T 80.6463 107.5/ 0.6876 n.a. n.a. 92.846234 39.888702 61.946518 2024-Oct-31 16:00 21 56 11.05 -35 28 17.8 239.443422 18.729363 n.a. n.a. 0.992811801072 0.4698434 0.00080691348504 1.6734579 99.5354 /T 80.4189 107.7/ 0.6732 n.a. n.a. 92.403875 40.534599 61.693880 2024-Oct-31 16:10 21 57 00.28 -35 16 42.5 238.628154 17.006139 n.a. n.a. 0.992813669618 0.4665078 0.00081359783620 1.6613694 99.7628 /T 80.1912 107.8/ 0.6589 n.a. n.a. 91.967875 41.185956 61.435511 2024-Oct-31 16:20 21 57 49.81 -35 05 17.4 237.782200 15.296413 n.a. n.a. 0.992815524802 0.4631639 0.00082023300873 1.6489245 99.9903 /T 79.9633 107.9/ 0.6450 n.a. n.a. 91.537292 41.841642 61.171311 2024-Oct-31 16:30 21 58 39.64 -34 54 02.5 236.905292 13.601150 n.a. n.a. 0.992817366592 0.4598123 0.00082681755839 1.6361164 100.2181 /T 79.7353 108.1/ 0.6312 n.a. n.a. 91.111185 42.500569 60.901197 2024-Oct-31 16:40 21 59 29.74 -34 42 57.8 235.997057 11.921345 n.a. n.a. 0.992819194957 0.4564539 0.00083335001619 1.6229396 100.4460 /T 79.5070 108.2/ 0.6178 n.a. n.a. 90.688611 43.161695 60.625095 2024-Oct-31 16:50 22 00 20.12 -34 32 03.3 235.057033 10.258030 n.a. n.a. 0.992821009874 0.4530893 0.00083982889301 1.6093895 100.6740 /T 79.2787 108.4/ 0.6045 n.a. n.a. 90.268625 43.824022 60.342947 2024-Oct-31 17:00 22 01 10.76 -34 21 19.0 234.084673 8.612277 n.a. n.a. 0.992822811318 0.4497192 0.00084625268404 1.5954629 100.9021 /T 79.0503 108.5/ 0.5916 n.a. n.a. 89.850281 44.486599 60.054707 2024-Oct-31 17:10 22 02 01.66 -34 10 45.0 233.079353 6.985201 n.a. n.a. 0.992824599270 0.4463444 0.00085261987333 1.5811575 101.1302 /T 78.8218 108.6/ 0.5789 n.a. n.a. 89.432632 45.148520 59.760342 2024-Oct-31 17:20 22 02 52.80 -34 00 21.3 232.040379 5.377964 n.a. n.a. 0.992826373712 0.4429654 0.00085892893811 1.5664721 101.3582 /T 78.5934 108.8/ 0.5665 n.a. n.a. 89.014730 45.808924 59.459835 2024-Oct-31 17:30 22 03 44.17 -33 50 07.7 230.966997 3.791779 n.a. n.a. 0.992828134628 0.4395829 0.00086517835321 1.5514066 101.5862 /T 78.3651 108.9/ 0.5543 n.a. n.a. 88.595627 46.466993 59.153179 2024-Oct-31 17:40 22 04 35.76 -33 40 04.5 229.858396 2.227912 n.a. n.a. 0.992829882007 0.4361974 0.00087136659520 1.5359621 101.8141 /T 78.1369 109.1/ 0.5424 n.a. n.a. 88.174376 47.121954 58.840382 2024-Oct-31 17:50 22 05 27.54 -33 30 11.4 228.713720 0.687687 n.a. n.a. 0.992831615838 0.4328097 0.00087749214654 1.5201404 102.0417 /T 77.9090 109.2/ 0.5308 n.a. n.a. 87.750035 47.773077 58.521466 >..... 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 ***************************************************************************************************************************************************************************************************************************************************