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 03:37:01 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-3 (spacecraft) (-140484) {source: MMS-3} Center body name: Earth (399) {source: DE441} Center-site name: iTelescope Obs., Siding Spring ******************************************************************************* 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 : 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.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 09:00 C 23 21 49.94 -16 04 16.3 349.173790 74.419045 n.a. n.a. 0.986343236322 0.0843689 0.00113527597303 -0.3927574 96.4514 /T 83.4830 106.4/ 1.0117 n.a. n.a. 32.114754 347.29024 -41.70759 2024-Nov-30 09:10 C 23 21 45.04 -15 59 00.8 340.612035 73.769472 n.a. n.a. 0.986343570813 0.0836543 0.00113371740122 -0.3830746 96.4634 /T 83.4710 106.3/ 0.9958 n.a. n.a. 32.527168 347.59397 -40.67553 2024-Nov-30 09:20 C 23 21 40.22 -15 53 41.0 332.792546 72.830475 n.a. n.a. 0.986343902424 0.0829281 0.00113219751751 -0.3734619 96.4762 /T 83.4584 106.3/ 0.9799 n.a. n.a. 32.925191 347.98381 -39.65231 2024-Nov-30 09:30 N 23 21 35.51 -15 48 16.8 325.815030 71.646330 n.a. n.a. 0.986344231109 0.0821901 0.00113071597391 -0.3639525 96.4899 /T 83.4448 106.2/ 0.9640 n.a. n.a. 33.309142 348.45680 -38.64035 2024-Nov-30 09:40 N 23 21 30.96 -15 42 48.3 319.674589 70.261161 n.a. n.a. 0.986344556819 0.0814403 0.00112927228936 -0.3545795 96.5046 /T 83.4302 106.1/ 0.9480 n.a. n.a. 33.679593 349.01016 -37.64204 2024-Nov-30 09:50 N 23 21 26.60 -15 37 15.6 314.303841 68.714366 n.a. n.a. 0.986344879507 0.0806784 0.00112786585067 -0.3453758 96.5204 /T 83.4145 106.1/ 0.9319 n.a. n.a. 34.037357 349.64120 -36.65972 2024-Nov-30 10:00 A 23 21 22.47 -15 31 38.7 309.608497 67.038881 n.a. n.a. 0.986345199123 0.0799044 0.00112649591380 -0.3363736 96.5375 /T 83.3974 106.0/ 0.9159 n.a. n.a. 34.383471 350.34731 -35.69575 2024-Nov-30 10:10 A 23 21 18.60 -15 25 57.7 305.489943 65.261231 n.a. n.a. 0.986345515619 0.0791179 0.00112516160515 -0.3276052 96.5560 /T 83.3790 105.9/ 0.8998 n.a. n.a. 34.719183 351.12590 -34.75245 2024-Nov-30 10:20 A 23 21 15.04 -15 20 12.7 301.856785 63.402362 n.a. n.a. 0.986345828945 0.0783190 0.00112386192364 -0.3191021 96.5760 /T 83.3590 105.9/ 0.8837 n.a. n.a. 35.045937 351.97442 -33.83213 2024-Nov-30 10:30 23 21 11.81 -15 14 23.8 298.629341 61.478690 n.a. n.a. 0.986346139049 0.0775074 0.00112259574267 -0.3108951 96.5978 /T 83.3374 105.8/ 0.8677 n.a. n.a. 35.365348 352.89024 -32.93710 2024-Nov-30 10:40 23 21 08.97 -15 08 30.9 295.740365 59.503071 n.a. n.a. 0.986346445882 0.0766829 0.00112136181267 -0.3030148 96.6213 /T 83.3140 105.7/ 0.8516 n.a. n.a. 35.679190 353.87070 -32.06967 2024-Nov-30 10:50 23 21 06.53 -15 02 34.3 293.134061 57.485623 n.a. n.a. 0.986346749390 0.0758454 0.00112015876383 -0.2954907 96.6467 /T 83.2886 105.7/ 0.8356 n.a. n.a. 35.989373 354.91302 -31.23211 2024-Nov-30 11:00 23 21 04.54 -14 56 34.1 290.764483 55.434361 n.a. n.a. 0.986347049521 0.0749947 0.00111898510908 -0.2883516 96.6741 /T 83.2613 105.6/ 0.8196 n.a. n.a. 36.297918 356.01433 -30.42668 2024-Nov-30 11:10 23 21 03.03 -14 50 30.2 288.593878 53.355696 n.a. n.a. 0.986347346221 0.0741307 0.00111783924745 -0.2816254 96.7036 /T 83.2318 105.5/ 0.8037 n.a. n.a. 36.606937 357.17156 -29.65560 2024-Nov-30 11:20 23 21 02.03 -14 44 22.9 286.591180 51.254807 n.a. n.a. 0.986347639437 0.0732530 0.00111671946760 -0.2753393 96.7355 /T 83.2001 105.5/ 0.7879 n.a. n.a. 36.918605 358.38150 -28.92103 2024-Nov-30 11:30 23 21 01.57 -14 38 12.2 284.730735 49.135919 n.a. n.a. 0.986347929114 0.0723616 0.00111562395157 -0.2695193 96.7696 /T 83.1660 105.4/ 0.7721 n.a. n.a. 37.235133 359.64076 -28.22508 2024-Nov-30 11:40 23 21 01.68 -14 31 58.3 282.991247 47.002523 n.a. n.a. 0.986348215195 0.0714562 0.00111455077887 -0.2641905 96.8062 /T 83.1294 105.4/ 0.7565 n.a. n.a. 37.558744 0.9457402 -27.56974 2024-Nov-30 11:50 23 21 02.40 -14 25 41.3 281.354937 44.857531 n.a. n.a. 0.986348497624 0.0705366 0.00111349793072 -0.2593768 96.8454 /T 83.0904 105.3/ 0.7409 n.a. n.a. 37.891643 2.2926462 -26.95690 2024-Nov-30 12:00 23 21 03.75 -14 19 21.2 279.806862 42.703402 n.a. n.a. 0.986348776345 0.0696027 0.00111246329446 -0.2551011 96.8872 /T 83.0486 105.2/ 0.7255 n.a. n.a. 38.235988 3.6774964 -26.38833 2024-Nov-30 12:10 23 21 05.76 -14 12 58.2 278.334375 40.542233 n.a. n.a. 0.986349051298 0.0686542 0.00111144466820 -0.2513849 96.9317 /T 83.0042 105.2/ 0.7101 n.a. n.a. 38.593862 5.0961275 -25.86563 2024-Nov-30 12:20 23 21 08.45 -14 06 32.5 276.926696 38.375838 n.a. n.a. 0.986349322425 0.0676909 0.00111043976562 -0.2482488 96.9790 /T 82.9569 105.1/ 0.6950 n.a. n.a. 38.967250 6.5442143 -25.39020 2024-Nov-30 12:30 23 21 11.84 -14 00 04.1 275.574566 36.205799 n.a. n.a. 0.986349589665 0.0667125 0.00110944622094 -0.2457119 97.0292 /T 82.9067 105.1/ 0.6799 n.a. n.a. 39.358005 8.0172964 -24.96325 2024-Nov-30 12:40 23 21 15.97 -13 53 33.1 274.269974 34.033512 n.a. n.a. 0.986349852959 0.0657189 0.00110846159386 -0.2437922 97.0824 /T 82.8536 105.1/ 0.6651 n.a. n.a. 39.767834 9.5108091 -24.58577 2024-Nov-30 12:50 23 21 20.85 -13 46 59.8 273.005930 31.860226 n.a. n.a. 0.986350112244 0.0647098 0.00110748337497 -0.2425061 97.1387 /T 82.7974 105.0/ 0.6504 n.a. n.a. 40.198269 11.020121 -24.25850 2024-Nov-30 13:00 23 21 26.50 -13 40 24.1 271.776287 29.687070 n.a. n.a. 0.986350367457 0.0636850 0.00110650899088 -0.2418691 97.1980 /T 82.7382 105.0/ 0.6358 n.a. n.a. 40.650651 12.540576 -23.98193 2024-Nov-30 13:10 23 21 32.94 -13 33 46.3 270.575595 27.515072 n.a. n.a. 0.986350618535 0.0626442 0.00110553580967 -0.2418951 97.2605 /T 82.6757 104.9/ 0.6215 n.a. n.a. 41.126114 14.067535 -23.75629 2024-Nov-30 13:20 23 21 40.19 -13 27 06.4 269.398978 25.345185 n.a. n.a. 0.986350865413 0.0615872 0.00110456114626 -0.2425965 97.3262 /T 82.6101 104.9/ 0.6073 n.a. n.a. 41.625573 15.596423 -23.58153 2024-Nov-30 13:30 23 21 48.26 -13 20 24.6 268.242036 23.178299 n.a. n.a. 0.986351108026 0.0605137 0.00110358226798 -0.2439846 97.3952 /T 82.5412 104.9/ 0.5934 n.a. n.a. 42.149718 17.122774 -23.45736 2024-Nov-30 13:40 23 21 57.17 -13 13 41.0 267.100759 21.015255 n.a. n.a. 0.986351346307 0.0594235 0.00110259640008 -0.2460692 97.4675 /T 82.4690 104.8/ 0.5796 n.a. n.a. 42.699005 18.642271 -23.38322 2024-Nov-30 13:50 23 22 06.93 -13 06 55.6 265.971462 18.856856 n.a. n.a. 0.986351580187 0.0583162 0.00110160073125 -0.2488586 97.5431 /T 82.3934 104.8/ 0.5661 n.a. n.a. 43.273660 20.150789 -23.35830 2024-Nov-30 14:00 23 22 17.55 -13 00 08.6 264.850721 16.703881 n.a. n.a. 0.986351809599 0.0571916 0.00110059241909 -0.2523601 97.6221 /T 82.3144 104.8/ 0.5528 n.a. n.a. 43.873679 21.644431 -23.38158 2024-Nov-30 14:10 23 22 29.05 -12 53 20.2 263.735327 14.557086 n.a. n.a. 0.986352034471 0.0560495 0.00109956859580 -0.2565791 97.7046 /T 82.2321 104.8/ 0.5398 n.a. n.a. 44.498837 23.119551 -23.45180 2024-Nov-30 14:20 23 22 41.43 -12 46 30.3 262.622239 12.417220 n.a. n.a. 0.986352254733 0.0548894 0.00109852637359 -0.2615200 97.7904 /T 82.1463 104.7/ 0.5269 n.a. n.a. 45.148693 24.572787 -23.56753 2024-Nov-30 14:30 23 22 54.70 -12 39 39.2 261.508547 10.285028 n.a. n.a. 0.986352470312 0.0537112 0.00109746285010 -0.2671858 97.8797 /T 82.0571 104.7/ 0.5144 n.a. n.a. 45.822606 26.001072 -23.72720 2024-Nov-30 14:40 23 23 08.86 -12 32 46.8 260.391437 8.161261 n.a. n.a. 0.986352681135 0.0525145 0.00109637511392 -0.2735780 97.9725 /T 81.9643 104.7/ 0.5020 n.a. n.a. 46.519749 27.401646 -23.92906 2024-Nov-30 14:50 23 23 23.92 -12 25 53.3 259.268166 6.046679 n.a. n.a. 0.986352887127 0.0512990 0.00109526024993 -0.2806969 98.0688 /T 81.8682 104.7/ 0.4900 n.a. n.a. 47.239120 28.772065 -24.17127 2024-Nov-30 15:00 23 23 39.88 -12 18 58.9 258.136027 3.942062 n.a. n.a. 0.986353088211 0.0500644 0.00109411534440 -0.2885415 98.1685 /T 81.7685 104.7/ 0.4781 n.a. n.a. 47.979566 30.110192 -24.45191 2024-Nov-30 15:10 23 23 56.74 -12 12 03.4 256.992330 1.848212 n.a. n.a. 0.986353284311 0.0488103 0.00109293749047 -0.2971095 98.2718 /T 81.6653 104.7/ 0.4666 n.a. n.a. 48.739793 31.414200 -24.76900 2024-Nov-30 15:20 23 24 14.51 -12 05 07.2 255.834375 -0.234033 n.a. n.a. 0.986353475347 0.0475364 0.00109172379294 -0.3063973 98.3785 /T 81.5587 104.7/ 0.4553 n.a. n.a. 49.518390 32.682553 -25.12050 >..... 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 ***************************************************************************************************************************************************************************************************************************************************