API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Nov 09, 2025 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 9 13:43:47 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-1 (spacecraft) (-140482) {source: MMS-1} Center body name: Earth (399) {source: DE441} Center-site name: iTelescope Obs., Siding Spring ******************************************************************************* 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 : 149.0644, -31.2733577, 1.16499 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 149.0644,5457.31536,-3292.4397 {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.251107.p260203 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-NOV-07. PREDICTS-> 2026-FEB-02 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 08:40 C 21 17 58.47 -46 24 14.4 178.139781 74.960479 n.a. n.a. 0.992725612236 0.5774035 0.00048924838458 2.1573395 88.9559 /T 91.0163 100.1/ 1.4269 n.a. n.a. 146.48279 34.489279 68.121517 2024-Oct-31 08:50 Ct 21 19 16.71 -46 04 20.4 184.055841 75.257489 n.a. n.a. 0.992727917812 0.5772123 0.00049785675535 2.1380693 89.2743 /T 90.6974 100.4/ 1.4088 n.a. n.a. 143.08070 33.823577 68.063694 2024-Oct-31 09:00 Ne 21 20 31.47 -45 44 44.3 190.220543 75.347742 n.a. n.a. 0.992730222041 0.5767402 0.00050639004848 2.1198519 89.5836 /T 90.3875 100.6/ 1.3906 n.a. n.a. 139.95060 33.207443 67.995460 2024-Oct-31 09:10 N 21 21 43.07 -45 25 25.4 196.434094 75.221493 n.a. n.a. 0.992732523851 0.5760131 0.00051485234369 2.1026177 89.8848 /T 90.0859 100.9/ 1.3722 n.a. n.a. 137.06585 32.641736 67.917568 2024-Oct-31 09:20 N 21 22 51.82 -45 06 22.7 202.489556 74.878879 n.a. n.a. 0.992734822267 0.5750541 0.00052324744767 2.0862999 90.1784 /T 89.7918 101.1/ 1.3538 n.a. n.a. 134.40252 32.127081 67.830750 2024-Oct-31 09:30 A 21 23 57.99 -44 47 35.5 208.207351 74.329478 n.a. n.a. 0.992737116405 0.5738838 0.00053157890581 2.0708350 90.4653 /T 89.5044 101.4/ 1.3353 n.a. n.a. 131.93912 31.663874 67.735710 2024-Oct-31 09:40 A 21 25 01.84 -44 29 03.1 213.459235 73.590094 n.a. n.a. 0.992739405458 0.5725211 0.00053985001312 2.0561617 90.7459 /T 89.2233 101.6/ 1.3167 n.a. n.a. 129.65633 31.252282 67.633121 2024-Oct-31 09:50 A 21 26 03.60 -44 10 44.9 218.175248 72.681699 n.a. n.a. 0.992741688689 0.5709826 0.00054806382416 2.0422212 91.0209 /T 88.9479 101.8/ 1.2980 n.a. n.a. 127.53678 30.892250 67.523615 2024-Oct-31 10:00 21 27 03.47 -43 52 40.3 222.336351 71.626557 n.a. n.a. 0.992743965427 0.5692837 0.00055622316218 2.0289570 91.2907 /T 88.6775 102.0/ 1.2792 n.a. n.a. 125.56481 30.583518 67.407784 2024-Oct-31 10:10 21 28 01.65 -43 34 48.9 225.960098 70.446114 n.a. n.a. 0.992746235057 0.5674380 0.00056433062790 2.0163146 91.5560 /T 88.4118 102.2/ 1.2604 n.a. n.a. 123.72638 30.325630 67.286173 2024-Oct-31 10:20 21 28 58.33 -43 17 10.2 229.085913 69.159793 n.a. n.a. 0.992748497019 0.5654580 0.00057238860740 2.0042414 91.8171 /T 88.1503 102.4/ 1.2416 n.a. n.a. 122.00885 30.117949 67.159278 2024-Oct-31 10:30 21 29 53.67 -42 59 43.8 231.763421 67.784500 n.a. n.a. 0.992750750797 0.5633551 0.00058039927990 1.9926868 92.0744 /T 87.8925 102.6/ 1.2227 n.a. n.a. 120.40083 29.959679 67.027546 2024-Oct-31 10:40 21 30 47.81 -42 42 29.5 234.044608 66.334596 n.a. n.a. 0.992752995922 0.5611396 0.00058836462484 1.9816018 92.3284 /T 87.6381 102.8/ 1.2038 n.a. n.a. 118.89213 29.849876 66.891371 2024-Oct-31 10:50 21 31 40.91 -42 25 26.9 235.979254 64.822108 n.a. n.a. 0.992755231963 0.5588209 0.00059628642890 1.9709392 92.5793 /T 87.3867 103.0/ 1.1849 n.a. n.a. 117.47358 29.787466 66.751097 2024-Oct-31 11:00 21 32 33.10 -42 08 35.8 237.612655 63.257043 n.a. n.a. 0.992757458523 0.5564075 0.00060416629252 1.9606534 92.8276 /T 87.1379 103.2/ 1.1660 n.a. n.a. 116.13695 29.771264 66.607017 2024-Oct-31 11:10 21 33 24.48 -41 51 56.0 238.984787 61.647714 n.a. n.a. 0.992759675241 0.5539073 0.00061200563625 1.9507002 93.0736 /T 86.8915 103.4/ 1.1471 n.a. n.a. 114.87485 29.799983 66.459375 2024-Oct-31 11:20 21 34 15.18 -41 35 27.3 240.130280 60.001042 n.a. n.a. 0.992761881784 0.5513274 0.00061980570701 1.9410372 93.3174 /T 86.6473 103.6/ 1.1283 n.a. n.a. 113.68067 29.872256 66.308366 2024-Oct-31 11:30 21 35 05.29 -41 19 09.5 241.078792 58.322814 n.a. n.a. 0.992764077847 0.5486744 0.00062756758395 1.9316232 93.5594 /T 86.4048 103.7/ 1.1095 n.a. n.a. 112.54848 29.986643 66.154139 2024-Oct-31 11:40 21 35 54.91 -41 03 02.6 241.855564 56.617898 n.a. n.a. 0.992766263150 0.5459544 0.00063529218439 1.9224186 93.7998 /T 86.1639 103.9/ 1.0907 n.a. n.a. 111.47295 30.141646 65.996803 2024-Oct-31 11:50 21 36 44.12 -40 47 06.5 242.482001 54.890422 n.a. n.a. 0.992768437436 0.5431728 0.00064298026950 1.9133851 94.0389 /T 85.9244 104.1/ 1.0721 n.a. n.a. 110.44932 30.335720 65.836422 2024-Oct-31 12:00 21 37 33.01 -40 31 21.0 242.976237 53.143912 n.a. n.a. 0.992770600470 0.5403347 0.00065063244991 1.9044860 94.2768 /T 85.6861 104.2/ 1.0535 n.a. n.a. 109.47331 30.567283 65.673028 2024-Oct-31 12:10 21 38 21.64 -40 15 46.1 243.353627 51.381406 n.a. n.a. 0.992772752035 0.5374449 0.00065824919130 1.8956857 94.5137 /T 85.4488 104.4/ 1.0350 n.a. n.a. 108.54109 30.834723 65.506614 2024-Oct-31 12:20 21 39 10.08 -40 00 21.8 243.627192 49.605548 n.a. n.a. 0.992774891934 0.5345076 0.00066583081975 1.8869502 94.7498 /T 85.2122 104.6/ 1.0165 n.a. n.a. 107.64921 31.136410 65.337147 2024-Oct-31 12:30 21 39 58.40 -39 45 08.0 243.807980 47.818657 n.a. n.a. 0.992777019984 0.5315267 0.00067337752724 1.8782466 94.9853 /T 84.9764 104.7/ 0.9982 n.a. n.a. 106.79458 31.470699 65.164563 2024-Oct-31 12:40 21 40 46.64 -39 30 04.7 243.905385 46.022788 n.a. n.a. 0.992779136020 0.5285060 0.00068088937695 1.8695434 95.2202 /T 84.7410 104.9/ 0.9801 n.a. n.a. 105.97440 31.835940 64.988776 2024-Oct-31 12:50 21 41 34.85 -39 15 12.0 243.927401 44.219777 n.a. n.a. 0.992781239890 0.5254489 0.00068836630852 1.8608107 95.4547 /T 84.5061 105.0/ 0.9620 n.a. n.a. 105.18614 32.230480 64.809680 2024-Oct-31 13:00 21 42 23.09 -39 00 29.7 243.880842 42.411282 n.a. n.a. 0.992783331453 0.5223584 0.00069580814338 1.8520194 95.6889 /T 84.2715 105.2/ 0.9441 n.a. n.a. 104.42751 32.652673 64.627151 2024-Oct-31 13:10 21 43 11.39 -38 45 58.0 243.771518 40.598814 n.a. n.a. 0.992785410583 0.5192375 0.00070321458991 1.8431421 95.9229 /T 84.0370 105.4/ 0.9263 n.a. n.a. 103.69642 33.100881 64.441049 2024-Oct-31 13:20 21 43 59.79 -38 31 36.9 243.604388 38.783760 n.a. n.a. 0.992787477164 0.5160888 0.00071058524864 1.8341525 96.1569 /T 83.8027 105.5/ 0.9088 n.a. n.a. 102.99097 33.573479 64.251225 2024-Oct-31 13:30 21 44 48.33 -38 17 26.3 243.383679 36.967407 n.a. n.a. 0.992789531089 0.5129148 0.00071791961741 1.8250256 96.3907 /T 83.5684 105.7/ 0.8913 n.a. n.a. 102.30939 34.068860 64.057521 2024-Oct-31 13:40 21 45 37.02 -38 03 26.3 243.112993 35.150960 n.a. n.a. 0.992791572264 0.5097178 0.00072521709645 1.8157378 96.6246 /T 83.3341 105.8/ 0.8741 n.a. n.a. 101.65005 34.585437 63.859772 2024-Oct-31 13:50 21 46 25.89 -37 49 36.9 242.795393 33.335557 n.a. n.a. 0.992793600600 0.5064999 0.00073247699352 1.8062666 96.8586 /T 83.0997 106.0/ 0.8570 n.a. n.a. 101.01145 35.121646 63.657812 2024-Oct-31 14:00 21 47 14.98 -37 35 58.2 242.433470 31.522280 n.a. n.a. 0.992795616017 0.5032630 0.00073969852897 1.7965908 97.0927 /T 82.8652 106.1/ 0.8402 n.a. n.a. 100.39215 35.675953 63.451470 2024-Oct-31 14:10 21 48 04.28 -37 22 30.1 242.029419 29.712174 n.a. n.a. 0.992797618598 0.5000849 0.00074688108263 1.7868089 97.3270 /T 82.6305 106.3/ 0.8235 n.a. n.a. 99.798190 36.247175 63.240399 2024-Oct-31 14:20 21 48 53.84 -37 09 12.7 241.585076 27.906246 n.a. n.a. 0.992799608421 0.4968872 0.00075402391915 1.7767691 97.5615 /T 82.3957 106.4/ 0.8071 n.a. n.a. 99.220238 36.833444 63.024558 2024-Oct-31 14:30 21 49 43.65 -36 56 06.1 241.101947 26.105476 n.a. n.a. 0.992801585410 0.4936712 0.00076112596532 1.7664531 97.7962 /T 82.1606 106.6/ 0.7908 n.a. n.a. 98.657081 37.433326 62.803779 2024-Oct-31 14:40 21 50 33.73 -36 43 10.2 240.581261 24.310828 n.a. n.a. 0.992803549494 0.4904380 0.00076818607936 1.7558446 98.0312 /T 81.9252 106.7/ 0.7748 n.a. n.a. 98.107566 38.045423 62.577899 2024-Oct-31 14:50 21 51 24.08 -36 30 25.0 240.023997 22.523254 n.a. n.a. 0.992805500607 0.4871887 0.00077520305598 1.7449283 98.2664 /T 81.6897 106.9/ 0.7590 n.a. n.a. 97.570571 38.668379 62.346761 2024-Oct-31 15:00 21 52 14.71 -36 17 50.7 239.430909 20.743703 n.a. n.a. 0.992807438688 0.4839244 0.00078217563177 1.7336905 98.5018 /T 81.4539 107.0/ 0.7435 n.a. n.a. 97.045004 39.300875 62.110218 2024-Oct-31 15:10 21 53 05.63 -36 05 27.2 238.802551 18.973128 n.a. n.a. 0.992809363678 0.4806461 0.00078910249048 1.7221186 98.7374 /T 81.2179 107.2/ 0.7282 n.a. n.a. 96.529793 39.941636 61.868134 2024-Oct-31 15:20 21 53 56.83 -35 53 14.6 238.139294 17.212486 n.a. n.a. 0.992811275524 0.4773547 0.00079598226791 1.7102013 98.9732 /T 80.9817 107.3/ 0.7132 n.a. n.a. 96.023880 40.589428 61.620381 2024-Oct-31 15:30 21 54 48.31 -35 41 12.9 237.441343 15.462752 n.a. n.a. 0.992813174176 0.4740511 0.00080281355733 1.6979285 99.2093 /T 80.7453 107.5/ 0.6984 n.a. n.a. 95.526219 41.243062 61.366845 2024-Oct-31 15:40 21 55 40.07 -35 29 22.0 236.708750 13.724915 n.a. n.a. 0.992815059586 0.4707361 0.00080959491426 1.6852916 99.4454 /T 80.5088 107.6/ 0.6838 n.a. n.a. 95.035773 41.901394 61.107423 2024-Oct-31 15:50 21 56 32.10 -35 17 42.2 235.941426 11.999992 n.a. n.a. 0.992816931711 0.4674107 0.00081632486169 1.6722829 99.6817 /T 80.2721 107.8/ 0.6696 n.a. n.a. 94.551508 42.563324 60.842025 2024-Oct-31 16:00 21 57 24.40 -35 06 13.2 235.139153 10.289024 n.a. n.a. 0.992818790511 0.4640754 0.00082300189480 1.6588962 99.9181 /T 80.0354 107.9/ 0.6555 n.a. n.a. 94.072396 43.227797 60.570574 2024-Oct-31 16:10 21 58 16.96 -34 54 55.2 234.301593 8.593087 n.a. n.a. 0.992820635948 0.4607312 0.00082962448606 1.6451264 100.1545 /T 79.7986 108.1/ 0.6418 n.a. n.a. 93.597411 43.893806 60.293006 2024-Oct-31 16:20 21 59 09.77 -34 43 48.2 233.428300 6.913294 n.a. n.a. 0.992822467989 0.4573787 0.00083619108980 1.6309696 100.3910 /T 79.5618 108.2/ 0.6283 n.a. n.a. 93.125528 44.560388 60.009270 2024-Oct-31 16:30 22 00 02.83 -34 32 52.1 232.518721 5.250801 n.a. n.a. 0.992824286602 0.4540186 0.00084270014705 1.6164230 100.6274 /T 79.3251 108.4/ 0.6151 n.a. n.a. 92.655724 45.226627 59.719329 2024-Oct-31 16:40 22 00 56.11 -34 22 06.9 231.572211 3.606811 n.a. n.a. 0.992826091758 0.4506517 0.00084915009022 1.6014850 100.8636 /T 79.0885 108.5/ 0.6022 n.a. n.a. 92.186980 45.891652 59.423160 2024-Oct-31 16:50 22 01 49.60 -34 11 32.6 230.588040 1.982577 n.a. n.a. 0.992827883432 0.4472785 0.00085553934749 1.5861552 101.0998 /T 78.8521 108.7/ 0.5895 n.a. n.a. 91.718277 46.554636 59.120753 2024-Oct-31 17:00 22 02 43.30 -34 01 09.3 229.565397 0.379409 n.a. n.a. 0.992829661600 0.4438998 0.00086186634746 1.5704342 101.3357 /T 78.6158 108.8/ 0.5771 n.a. n.a. 91.248603 47.214796 58.812111 >..... 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 Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************