API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 09, 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 Mon Dec 9 18:06:30 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-3 (spacecraft) (-140484) {source: MMS-3} Center body name: Earth (399) {source: DE441} Center-site name: Swan Reach Imaging, Glenalta ******************************************************************************* 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 : 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.241209.p250307 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-DEC-09. PREDICTS-> 2025-MAR-06 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 09:50 C 23 22 43.45 -15 31 08.6 343.262980 70.136014 n.a. n.a. 0.986344879507 0.0806784 0.00112751006093 -0.4088512 96.8433 /T 83.0916 106.4/ 0.9409 n.a. n.a. 32.770189 349.68375 -42.47187 2024-Nov-30 10:00 C 23 22 39.42 -15 25 44.1 336.616939 69.335915 n.a. n.a. 0.986345199123 0.0799044 0.00112588534820 -0.3999044 96.8594 /T 83.0755 106.4/ 0.9256 n.a. n.a. 33.164303 350.04660 -41.54198 2024-Nov-30 10:10 N 23 22 35.50 -15 20 15.3 330.475657 68.324683 n.a. n.a. 0.986345515619 0.0791179 0.00112429629885 -0.3910632 96.8765 /T 83.0586 106.3/ 0.9102 n.a. n.a. 33.546678 350.49059 -40.62229 2024-Nov-30 10:20 N 23 22 31.73 -15 14 42.4 324.868289 67.130377 n.a. n.a. 0.986345828945 0.0783190 0.00112274242497 -0.3823595 96.8946 /T 83.0406 106.2/ 0.8947 n.a. n.a. 33.917823 351.01298 -39.71500 2024-Nov-30 10:30 N 23 22 28.16 -15 09 05.4 319.786253 65.780254 n.a. n.a. 0.986346139050 0.0775074 0.00112122311156 -0.3738248 96.9137 /T 83.0215 106.2/ 0.8793 n.a. n.a. 34.278475 351.61111 -38.82231 2024-Nov-30 10:40 N 23 22 24.80 -15 03 24.2 315.196852 64.299149 n.a. n.a. 0.986346445882 0.0766829 0.00111973761775 -0.3654904 96.9342 /T 83.0012 106.1/ 0.8638 n.a. n.a. 34.629579 352.28235 -37.94634 2024-Nov-30 10:50 A 23 22 21.71 -14 57 39.1 311.054846 62.708761 n.a. n.a. 0.986346749390 0.0758454 0.00111828507822 -0.3573870 96.9560 /T 82.9794 106.0/ 0.8484 n.a. n.a. 34.972281 353.02412 -37.08924 2024-Nov-30 11:00 A 23 22 18.92 -14 51 50.0 307.310661 61.027542 n.a. n.a. 0.986347049521 0.0749947 0.00111686450501 -0.3495450 96.9794 /T 82.9562 106.0/ 0.8329 n.a. n.a. 35.307907 353.83381 -36.25308 2024-Nov-30 11:10 A 23 22 16.46 -14 45 57.1 303.915475 59.270929 n.a. n.a. 0.986347346222 0.0741307 0.00111547478966 -0.3419941 97.0044 /T 82.9313 105.9/ 0.8175 n.a. n.a. 35.637946 354.70877 -35.43996 2024-Nov-30 11:20 A 23 22 14.37 -14 40 00.4 300.823951 57.451719 n.a. n.a. 0.986347639438 0.0732530 0.00111411470547 -0.3347634 97.0311 /T 82.9046 105.9/ 0.8020 n.a. n.a. 35.964035 355.64629 -34.65190 2024-Nov-30 11:30 23 22 12.68 -14 34 00.0 297.995431 55.580481 n.a. n.a. 0.986347929114 0.0723616 0.00111278291021 -0.3278815 97.0597 /T 82.8761 105.8/ 0.7867 n.a. n.a. 36.287933 356.64355 -33.89095 2024-Nov-30 11:40 23 22 11.42 -14 27 55.9 295.394211 53.665949 n.a. n.a. 0.986348215196 0.0714562 0.00111147794908 -0.3213761 97.0903 /T 82.8456 105.7/ 0.7713 n.a. n.a. 36.611504 357.69764 -33.15907 2024-Nov-30 11:50 23 22 10.63 -14 21 48.4 292.989331 51.715354 n.a. n.a. 0.986348497625 0.0705366 0.00111019825783 -0.3152739 97.1229 /T 82.8130 105.7/ 0.7561 n.a. n.a. 36.936692 358.80548 -32.45820 2024-Nov-30 12:00 23 22 10.34 -14 15 37.5 290.754125 49.734716 n.a. n.a. 0.986348776346 0.0696027 0.00110894216616 -0.3096009 97.1578 /T 82.7782 105.6/ 0.7409 n.a. n.a. 37.265500 359.96385 -31.79023 2024-Nov-30 12:10 23 22 10.58 -14 09 23.2 288.665700 47.729068 n.a. n.a. 0.986349051299 0.0686542 0.00110770790143 -0.3043823 97.1949 /T 82.7411 105.6/ 0.7258 n.a. n.a. 37.599961 1.1693844 -31.15696 2024-Nov-30 12:20 23 22 11.38 -14 03 05.7 286.704410 45.702655 n.a. n.a. 0.986349322426 0.0676909 0.00110649359256 -0.2996420 97.2345 /T 82.7017 105.5/ 0.7108 n.a. n.a. 37.942115 2.4185164 -30.56013 2024-Nov-30 12:30 23 22 12.76 -13 56 45.1 284.853376 43.659077 n.a. n.a. 0.986349589666 0.0667125 0.00110529727400 -0.2954031 97.2766 /T 82.6597 105.5/ 0.6959 n.a. n.a. 38.293986 3.7075272 -30.00135 2024-Nov-30 12:40 23 22 14.76 -13 50 21.5 283.098057 41.601413 n.a. n.a. 0.986349852960 0.0657189 0.00110411689013 -0.2916875 97.3212 /T 82.6151 105.4/ 0.6812 n.a. n.a. 38.657548 5.0325315 -29.48211 2024-Nov-30 12:50 23 22 17.40 -13 43 55.0 281.425880 39.532320 n.a. n.a. 0.986350112245 0.0647098 0.00110295029962 -0.2885159 97.3685 /T 82.5679 105.3/ 0.6665 n.a. n.a. 39.034708 6.3894937 -29.00379 2024-Nov-30 13:00 23 22 20.70 -13 37 25.8 279.825928 37.454109 n.a. n.a. 0.986350367458 0.0636850 0.00110179528004 -0.2859081 97.4186 /T 82.5179 105.3/ 0.6520 n.a. n.a. 39.427277 7.7742463 -28.56759 2024-Nov-30 13:10 23 22 24.69 -13 30 53.8 278.288671 35.368806 n.a. n.a. 0.986350618536 0.0626442 0.00110064953267 -0.2838824 97.4715 /T 82.4651 105.3/ 0.6376 n.a. n.a. 39.836947 9.1825144 -28.17453 2024-Nov-30 13:20 23 22 29.40 -13 24 19.4 276.805751 33.278208 n.a. n.a. 0.986350865414 0.0615872 0.00109951068732 -0.2824560 97.5273 /T 82.4093 105.2/ 0.6234 n.a. n.a. 40.265269 10.609946 -27.82547 2024-Nov-30 13:30 23 22 34.83 -13 17 42.4 275.369789 31.183917 n.a. n.a. 0.986351108027 0.0605137 0.00109837630734 -0.2816448 97.5861 /T 82.3506 105.2/ 0.6094 n.a. n.a. 40.713635 12.052143 -27.52103 2024-Nov-30 13:40 23 22 41.02 -13 11 03.2 273.974231 29.087382 n.a. n.a. 0.986351346308 0.0594235 0.00109724389472 -0.2814636 97.6479 /T 82.2889 105.1/ 0.5955 n.a. n.a. 41.183263 13.504704 -27.26166 2024-Nov-30 13:50 23 22 47.98 -13 04 21.7 272.613220 26.989920 n.a. n.a. 0.986351580188 0.0583162 0.00109611089521 -0.2819257 97.7128 /T 82.2240 105.1/ 0.5819 n.a. n.a. 41.675179 14.963255 -27.04757 2024-Nov-30 14:00 23 22 55.73 -12 57 38.0 271.281479 24.892744 n.a. n.a. 0.986351809600 0.0571916 0.00109497470359 -0.2830431 97.7809 /T 82.1560 105.1/ 0.5684 n.a. n.a. 42.190208 16.423497 -26.87875 2024-Nov-30 14:10 23 23 04.28 -12 50 52.4 269.974227 22.796980 n.a. n.a. 0.986352034472 0.0560495 0.00109383266892 -0.2848266 97.8522 /T 82.0848 105.0/ 0.5551 n.a. n.a. 42.728969 17.881240 -26.75498 2024-Nov-30 14:20 23 23 13.65 -12 44 04.9 268.687091 20.703686 n.a. n.a. 0.986352254734 0.0548894 0.00109268209985 -0.2872856 97.9267 /T 82.0104 105.0/ 0.5420 n.a. n.a. 43.291870 19.332442 -26.67582 2024-Nov-30 14:30 23 23 23.85 -12 37 15.5 267.416043 18.613862 n.a. n.a. 0.986352470313 0.0537112 0.00109152026994 -0.2904281 98.0045 /T 81.9326 105.0/ 0.5292 n.a. n.a. 43.879105 20.773243 -26.64063 2024-Nov-30 14:40 23 23 34.89 -12 30 24.5 266.157344 16.528469 n.a. n.a. 0.986352681136 0.0525145 0.00109034442303 -0.2942610 98.0857 /T 81.8516 105.0/ 0.5165 n.a. n.a. 44.490660 22.199995 -26.64859 2024-Nov-30 14:50 23 23 46.79 -12 23 31.9 264.907488 14.448433 n.a. n.a. 0.986352887128 0.0512990 0.00108915177851 -0.2987896 98.1702 /T 81.7671 104.9/ 0.5041 n.a. n.a. 45.126319 23.609286 -26.69867 2024-Nov-30 15:00 23 23 59.54 -12 16 37.7 263.663163 12.374662 n.a. n.a. 0.986353088212 0.0500644 0.00108793953662 -0.3040181 98.2580 /T 81.6794 104.9/ 0.4919 n.a. n.a. 45.785669 24.997966 -26.78973 2024-Nov-30 15:10 23 24 13.17 -12 09 42.1 262.421214 10.308049 n.a. n.a. 0.986353284312 0.0488103 0.00108670488368 -0.3099492 98.3493 /T 81.5882 104.9/ 0.4800 n.a. n.a. 46.468113 26.363153 -26.92043 2024-Nov-30 15:20 23 24 27.66 -12 02 45.1 261.178602 8.249483 n.a. n.a. 0.986353475348 0.0475364 0.00108544499741 -0.3165846 98.4440 /T 81.4936 104.9/ 0.4683 n.a. n.a. 47.172881 27.702250 -27.08936 2024-Nov-30 15:30 23 24 43.04 -11 55 46.9 259.932383 6.199858 n.a. n.a. 0.986353661239 0.0462424 0.00108415705196 -0.3239243 98.5421 /T 81.3955 104.9/ 0.4569 n.a. n.a. 47.899048 29.012943 -27.29498 2024-Nov-30 15:40 23 24 59.30 -11 48 47.6 258.679671 4.160079 n.a. n.a. 0.986353841906 0.0449278 0.00108283822301 -0.3319676 98.6437 /T 81.2941 104.9/ 0.4457 n.a. n.a. 48.645543 30.293204 -27.53569 2024-Nov-30 15:50 23 25 16.44 -11 41 47.1 257.417622 2.131071 n.a. n.a. 0.986354017263 0.0435924 0.00108148569278 -0.3407119 98.7486 /T 81.1892 104.9/ 0.4347 n.a. n.a. 49.411168 31.541284 -27.80982 2024-Nov-30 16:00 23 25 34.47 -11 34 45.5 256.143405 0.113786 n.a. n.a. 0.986354187227 0.0422356 0.00108009665496 -0.3501541 98.8571 /T 81.0809 104.9/ 0.4240 n.a. n.a. 50.194617 32.755701 -28.11566 >..... 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 ***************************************************************************************************************************************************************************************************************************************************