API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 2024 MMS-3 Spacecraft / (Earth) -140484 https://www.nasa.gov/mission_pages/mms/index.html MMS 3 Magnetospheric Multiscale (MMS) mission: the third 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 Thu Dec 12 02:04:59 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-3 (spacecraft) (-140484) {source: MMS-3} Center body name: Earth (399) {source: DE441} Center-site name: SATINO Remote Observatory, Haute Provence ******************************************************************************* Start time : A.D. 2024-Nov-30 00:00:00.0000 UT Stop time : A.D. 2024-Dec-01 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 5.7124, 43.9320269, .703985 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 5.7124, 4601.22659, 4403.14405 {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.241211.p250309 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-DEC-11. PREDICTS-> 2025-MAR-08 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-Nov-30 16:10 C 23 37 24.57 -14 37 16.8 141.403057 22.792786 n.a. n.a. 0.986354351713 0.0408572 0.00106075752645 -0.9329661 100.1679 /T 79.7712 106.2/ 0.5921 n.a. n.a. 30.874113 9.2456371 -67.00756 2024-Nov-30 16:20 C 23 37 27.76 -14 32 10.0 143.707601 23.960693 n.a. n.a. 0.986354510630 0.0394568 0.00105701734304 -0.9299604 100.2097 /T 79.7296 106.2/ 0.5838 n.a. n.a. 31.204487 7.9998723 -66.79380 2024-Nov-30 16:30 C 23 37 30.53 -14 26 58.8 146.068868 25.072491 n.a. n.a. 0.986354663890 0.0380339 0.00105328981368 -0.9266449 100.2506 /T 79.6890 106.2/ 0.5753 n.a. n.a. 31.562367 6.8411955 -66.55544 2024-Nov-30 16:40 N 23 37 32.91 -14 21 43.2 148.487181 26.124872 n.a. n.a. 0.986354811403 0.0365880 0.00104957613679 -0.9230417 100.2905 /T 79.6493 106.1/ 0.5668 n.a. n.a. 31.944972 5.7721871 -66.29473 2024-Nov-30 16:50 N 23 37 34.93 -14 16 23.2 150.962367 27.114500 n.a. n.a. 0.986354953074 0.0351189 0.00104587742048 -0.9191737 100.3296 /T 79.6104 106.1/ 0.5582 n.a. n.a. 32.349549 4.7946094 -66.01393 2024-Nov-30 17:00 N 23 37 36.61 -14 10 58.5 153.493698 28.038039 n.a. n.a. 0.986355088810 0.0336259 0.00104219467961 -0.9150645 100.3681 /T 79.5722 106.1/ 0.5496 n.a. n.a. 32.773421 3.9094932 -65.71524 2024-Nov-30 17:10 A 23 37 37.98 -14 05 29.2 156.079838 28.892192 n.a. n.a. 0.986355218514 0.0321087 0.00103852883266 -0.9107385 100.4059 /T 79.5346 106.1/ 0.5409 n.a. n.a. 33.214013 3.1172274 -65.40080 2024-Nov-30 17:20 A 23 37 39.07 -13 59 55.2 158.718796 29.673739 n.a. n.a. 0.986355342088 0.0305668 0.00103488069913 -0.9062207 100.4433 /T 79.4974 106.0/ 0.5322 n.a. n.a. 33.668888 2.4176507 -65.07270 2024-Nov-30 17:30 A 23 37 39.91 -13 54 16.4 161.407894 30.379585 n.a. n.a. 0.986355459431 0.0289997 0.00103125099688 -0.9015368 100.4803 /T 79.4606 106.0/ 0.5234 n.a. n.a. 34.135767 1.8101376 -64.73290 2024-Nov-30 17:40 A 23 37 40.53 -13 48 32.8 164.143749 31.006803 n.a. n.a. 0.986355570442 0.0274069 0.00102764033985 -0.8967128 100.5171 /T 79.4241 106.0/ 0.5146 n.a. n.a. 34.612552 1.2936801 -64.38331 2024-Nov-30 17:50 23 37 40.97 -13 42 44.3 166.922270 31.552686 n.a. n.a. 0.986355675017 0.0257879 0.00102404923587 -0.8917756 100.5537 /T 79.3876 105.9/ 0.5058 n.a. n.a. 35.097338 0.8669595 -64.02573 2024-Nov-30 18:00 23 37 41.24 -13 36 50.9 169.738685 32.014798 n.a. n.a. 0.986355773047 0.0241420 0.00102047808479 -0.8867522 100.5903 /T 79.3512 105.9/ 0.4969 n.a. n.a. 35.588428 0.5284103 -63.66186 2024-Nov-30 18:10 23 37 41.40 -13 30 52.5 172.587583 32.391018 n.a. n.a. 0.986355864427 0.0224689 0.00101692717685 -0.8816703 100.6271 /T 79.3147 105.9/ 0.4881 n.a. n.a. 36.084341 0.2762740 -63.29328 2024-Nov-30 18:20 23 37 41.47 -13 24 49.2 175.462983 32.679591 n.a. n.a. 0.986355949043 0.0207680 0.00101339669118 -0.8765575 100.6641 /T 79.2779 105.8/ 0.4792 n.a. n.a. 36.583818 0.1086442 -62.92151 2024-Nov-30 18:30 23 37 41.48 -13 18 40.8 178.358433 32.879161 n.a. n.a. 0.986356026785 0.0190385 0.00100988669475 -0.8714420 100.7014 /T 79.2408 105.8/ 0.4703 n.a. n.a. 37.085825 0.0235021 -62.54793 2024-Nov-30 18:40 t 23 37 41.47 -13 12 27.4 181.267120 32.988809 n.a. n.a. 0.986356097535 0.0172801 0.00100639714129 -0.8663522 100.7393 /T 79.2031 105.8/ 0.4615 n.a. n.a. 37.589555 0.0187442 -62.17383 2024-Nov-30 18:50 e 23 37 41.48 -13 06 09.0 184.181999 33.008070 n.a. n.a. 0.986356161176 0.0154919 0.00100292787075 -0.8613164 100.7778 /T 79.1648 105.7/ 0.4527 n.a. n.a. 38.094427 0.0922033 -61.80041 2024-Nov-30 19:00 23 37 41.54 -12 59 45.5 187.095942 32.936950 n.a. n.a. 0.986356217588 0.0136735 0.00099947860896 -0.8563631 100.8170 /T 79.1258 105.7/ 0.4439 n.a. n.a. 38.600082 0.2416615 -61.42877 2024-Nov-30 19:10 23 37 41.69 -12 53 17.0 190.001874 32.775924 n.a. n.a. 0.986356266649 0.0118242 0.00099604896732 -0.8515209 100.8571 /T 79.0859 105.7/ 0.4351 n.a. n.a. 39.106383 0.4648593 -61.05991 2024-Nov-30 19:20 23 37 41.96 -12 46 43.4 192.892925 32.525929 n.a. n.a. 0.986356308231 0.0099432 0.00099263844307 -0.8468182 100.8983 /T 79.0449 105.6/ 0.4264 n.a. n.a. 39.613406 0.7594987 -60.69477 2024-Nov-30 19:30 23 37 42.39 -12 40 04.7 195.762560 32.188344 n.a. n.a. 0.986356342208 0.0080299 0.00098924641972 -0.8422832 100.9406 /T 79.0028 105.6/ 0.4177 n.a. n.a. 40.121432 1.1232433 -60.33415 2024-Nov-30 19:40 23 37 43.02 -12 33 21.0 198.604698 31.764958 n.a. n.a. 0.986356368447 0.0060835 0.00098587216757 -0.8379440 100.9842 /T 78.9595 105.5/ 0.4091 n.a. n.a. 40.630943 1.5537146 -59.97883 2024-Nov-30 19:50 23 37 43.88 -12 26 32.3 201.413812 31.257934 n.a. n.a. 0.986356386815 0.0041034 0.00098251484482 -0.8338285 101.0292 /T 78.9146 105.5/ 0.4006 n.a. n.a. 41.142608 2.0484871 -59.62947 2024-Nov-30 20:00 23 37 45.02 -12 19 38.6 204.185005 30.669768 n.a. n.a. 0.986356397175 0.0020888 0.00097917349869 -0.8299642 101.0757 /T 78.8683 105.5/ 0.3921 n.a. n.a. 41.657275 2.6050804 -59.28666 2024-Nov-30 20:10 23 37 46.45 -12 12 40.0 206.914060 30.003238 n.a. n.a. 0.986356399387 0.0000389 0.00097584706677 -0.8263782 101.1240 /T 78.8203 105.4/ 0.3837 n.a. n.a. 42.175953 3.2209520 -58.95095 2024-Nov-30 20:20 23 37 48.24 -12 05 36.4 209.597471 29.261356 n.a. n.a. 0.986356393306 -0.0020472 0.00097253437897 -0.8230971 101.1740 /T 78.7704 105.4/ 0.3754 n.a. n.a. 42.699807 3.8934888 -58.62281 2024-Nov-30 20:30 23 37 50.40 -11 58 27.9 212.232448 28.447321 n.a. n.a. 0.986356378787 -0.0041703 0.00096923415916 -0.8201470 101.2260 /T 78.7186 105.4/ 0.3672 n.a. n.a. 43.230136 4.6199996 -58.30264 2024-Nov-30 20:40 23 37 52.97 -11 51 14.5 214.816900 27.564466 n.a. n.a. 0.986356355679 -0.0063312 0.00096594502768 -0.8175536 101.2800 /T 78.6648 105.3/ 0.3592 n.a. n.a. 43.768358 5.3977080 -57.99080 2024-Nov-30 20:50 23 37 55.99 -11 43 56.3 217.349410 26.616221 n.a. n.a. 0.986356323828 -0.0085308 0.00096266550348 -0.8153416 101.3363 /T 78.6087 105.3/ 0.3512 n.a. n.a. 44.315994 6.2237477 -57.68761 2024-Nov-30 21:00 23 37 59.50 -11 36 33.4 219.829187 25.606063 n.a. n.a. 0.986356283078 -0.0107700 0.00095939400697 -0.8135355 101.3948 /T 78.5504 105.3/ 0.3433 n.a. n.a. 44.874651 7.0951589 -57.39334 2024-Nov-30 21:10 23 38 03.53 -11 29 05.7 222.256019 24.537487 n.a. n.a. 0.986356233267 -0.0130499 0.00095612886269 -0.8121586 101.4558 /T 78.4896 105.3/ 0.3356 n.a. n.a. 45.446000 8.0088875 -57.10824 2024-Nov-30 21:20 23 38 08.10 -11 21 33.2 224.630214 23.413970 n.a. n.a. 0.986356174230 -0.0153714 0.00095286830253 -0.8112337 101.5194 /T 78.4262 105.2/ 0.3281 n.a. n.a. 46.031757 8.9617867 -56.83252 2024-Nov-30 21:30 23 38 13.27 -11 13 56.2 226.952539 22.238949 n.a. n.a. 0.986356105799 -0.0177355 0.00094961046889 -0.8107827 101.5857 /T 78.3601 105.2/ 0.3206 n.a. n.a. 46.633667 9.9506218 -56.56637 2024-Nov-30 21:40 23 38 19.05 -11 06 14.5 229.224164 21.015792 n.a. n.a. 0.986356027799 -0.0201432 0.00094635341806 -0.8108266 101.6547 /T 78.2913 105.2/ 0.3134 n.a. n.a. 47.253478 10.972077 -56.30997 2024-Nov-30 21:50 23 38 25.47 -10 58 28.3 231.446605 19.747790 n.a. n.a. 0.986355940054 -0.0225957 0.00094309512391 -0.8113854 101.7267 /T 78.2195 105.2/ 0.3062 n.a. n.a. 47.892927 12.022769 -56.06349 2024-Nov-30 22:00 23 38 32.58 -10 50 37.6 233.621666 18.438136 n.a. n.a. 0.986355842381 -0.0250941 0.00093983348153 -0.8124785 101.8017 /T 78.1447 105.1/ 0.2993 n.a. n.a. 48.553717 13.099254 -55.82711 2024-Nov-30 22:10 23 38 40.40 -10 42 42.5 235.751391 17.089908 n.a. n.a. 0.986355734312 -0.0277779 0.00093656602043 -0.8142650 101.8798 /T 78.0668 105.1/ 0.2925 n.a. n.a. 49.225890 14.194297 -55.61191 2024-Nov-30 22:20 23 38 48.95 -10 34 43.1 237.838022 15.706073 n.a. n.a. 0.986355615422 -0.0304891 0.00093329026857 -0.8165923 101.9611 /T 77.9857 105.1/ 0.2859 n.a. n.a. 49.924071 15.309201 -55.40529 2024-Nov-30 22:30 23 38 58.27 -10 26 39.3 239.883962 14.289510 n.a. n.a. 0.986355485614 -0.0332213 0.00093000403893 -0.8194698 102.0457 /T 77.9013 105.1/ 0.2795 n.a. n.a. 50.650452 16.440523 -55.20686 2024-Nov-30 22:40 23 39 08.37 -10 18 31.4 241.891739 12.842985 n.a. n.a. 0.986355344811 -0.0359712 0.00092670510122 -0.8229093 102.1338 /T 77.8134 105.1/ 0.2732 n.a. n.a. 51.406922 17.584717 -55.01645 2024-Nov-30 22:50 23 39 19.30 -10 10 19.2 243.863982 11.369156 n.a. n.a. 0.986355192946 -0.0387380 0.00092339117343 -0.8269248 102.2254 /T 77.7220 105.1/ 0.2672 n.a. n.a. 52.195053 18.738185 -54.83415 2024-Nov-30 23:00 23 39 31.08 -10 02 02.7 245.803391 9.870575 n.a. n.a. 0.986355029946 -0.0415236 0.00092005991342 -0.8315321 102.3206 /T 77.6270 105.1/ 0.2613 n.a. n.a. 53.016079 19.897334 -54.66030 2024-Nov-30 23:10 23 39 43.72 -09 53 42.0 247.712726 8.349691 n.a. n.a. 0.986354855728 -0.0443326 0.00091670891193 -0.8367488 102.4195 /T 77.5283 105.1/ 0.2556 n.a. n.a. 53.870886 21.058623 -54.49542 2024-Nov-30 23:20 23 39 57.26 -09 45 17.1 249.594784 6.808857 n.a. n.a. 0.986354670186 -0.0471716 0.00091333568778 -0.8425932 102.5223 /T 77.4257 105.1/ 0.2502 n.a. n.a. 54.760026 22.218617 -54.34023 2024-Nov-30 23:30 23 40 11.72 -09 36 48.0 251.452395 5.250331 n.a. n.a. 0.986354473181 -0.0500491 0.00090993768561 -0.8490836 102.6290 /T 77.3193 105.1/ 0.2450 n.a. n.a. 55.683750 23.374035 -54.19552 2024-Nov-30 23:40 23 40 27.13 -09 28 14.7 253.288408 3.676291 n.a. n.a. 0.986354264542 -0.0529746 0.00090651227702 -0.8562381 102.7396 /T 77.2088 105.1/ 0.2399 n.a. n.a. 56.642049 24.521787 -54.06217 2024-Nov-30 23:50 23 40 43.49 -09 19 37.3 255.105693 2.088836 n.a. n.a. 0.986354044055 -0.0559581 0.00090305676483 -0.8640727 102.8544 /T 77.0943 105.2/ 0.2351 n.a. n.a. 57.634714 25.659002 -53.94103 2024-Dec-01 00:00 23 41 00.84 -09 10 55.6 256.907130 0.489997 n.a. n.a. 0.986353811468 -0.0590095 0.00089956839062 -0.8726018 102.9733 /T 76.9756 105.2/ 0.2305 n.a. n.a. 58.661386 26.783048 -53.83288 $$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 ***************************************************************************************************************************************************************************************************************************************************