API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 09, 2024 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 Mon Dec 9 17:10:11 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-1 (spacecraft) (-140482) {source: MMS-1} 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 23 10.09 -15 22 02.5 343.675581 70.014779 n.a. n.a. 0.986347630352 0.0791571 0.00112433919421 -0.4213293 97.0041 /T 82.9310 106.6/ 0.9409 n.a. n.a. 32.943280 349.77498 -43.26064 2024-Nov-30 10:00 C 23 23 06.08 -15 16 36.1 337.046516 69.228441 n.a. n.a. 0.986347943849 0.0783595 0.00112266433317 -0.4124065 97.0205 /T 82.9146 106.5/ 0.9256 n.a. n.a. 33.339792 350.13116 -42.35011 2024-Nov-30 10:10 N 23 23 02.17 -15 11 05.6 330.911121 68.230622 n.a. n.a. 0.986348254129 0.0775493 0.00112102503981 -0.4035889 97.0379 /T 82.8974 106.5/ 0.9102 n.a. n.a. 33.724650 350.56851 -41.44935 2024-Nov-30 10:20 N 23 22 58.42 -15 05 30.8 325.300965 67.048951 n.a. n.a. 0.986348561144 0.0767263 0.00111942082818 -0.3949083 97.0562 /T 82.8792 106.4/ 0.8947 n.a. n.a. 34.098353 351.08428 -40.56053 2024-Nov-30 10:30 N 23 22 54.85 -14 59 51.9 320.210021 65.710425 n.a. n.a. 0.986348864840 0.0758902 0.00111785108509 -0.3863963 97.0757 /T 82.8598 106.3/ 0.8793 n.a. n.a. 34.461625 351.67582 -39.68577 2024-Nov-30 10:40 N 23 22 51.51 -14 54 08.9 315.607832 64.239769 n.a. n.a. 0.986349165165 0.0750410 0.00111631507127 -0.3780841 97.0964 /T 82.8392 106.3/ 0.8638 n.a. n.a. 34.815406 352.34055 -38.82715 2024-Nov-30 10:50 A 23 22 48.43 -14 48 21.9 311.450898 62.658669 n.a. n.a. 0.986349462066 0.0741785 0.00111481192285 -0.3700026 97.1185 /T 82.8172 106.2/ 0.8484 n.a. n.a. 35.160834 353.07586 -37.98673 2024-Nov-30 11:00 A 23 22 45.64 -14 42 30.9 307.690900 60.985629 n.a. n.a. 0.986349755488 0.0733025 0.00111334065309 -0.3621822 97.1421 /T 82.7936 106.1/ 0.8329 n.a. n.a. 35.499231 353.87917 -37.16653 2024-Nov-30 11:10 A 23 22 43.19 -14 36 36.0 304.279852 59.236171 n.a. n.a. 0.986350045378 0.0724127 0.00111190015453 -0.3546528 97.1674 /T 82.7685 106.1/ 0.8175 n.a. n.a. 35.832082 354.74783 -36.36857 2024-Nov-30 11:20 A 23 22 41.10 -14 30 37.3 301.172948 57.423188 n.a. n.a. 0.986350331680 0.0715090 0.00111048920121 -0.3474434 97.1944 /T 82.7416 106.0/ 0.8020 n.a. n.a. 36.161022 355.67914 -35.59482 2024-Nov-30 11:30 23 22 39.42 -14 24 34.9 298.329838 55.557352 n.a. n.a. 0.986350614337 0.0705912 0.00110910645154 -0.3405827 97.2232 /T 82.7128 106.0/ 0.7867 n.a. n.a. 36.487812 356.67030 -34.84723 2024-Nov-30 11:40 23 22 38.17 -14 18 28.8 295.714983 53.647489 n.a. n.a. 0.986350893292 0.0696591 0.00110775045099 -0.3340983 97.2541 /T 82.6820 105.9/ 0.7713 n.a. n.a. 36.814319 357.71840 -34.12771 2024-Nov-30 11:50 23 22 37.38 -14 12 19.2 293.297485 51.700916 n.a. n.a. 0.986351168487 0.0687124 0.00110641963534 -0.3280172 97.2870 /T 82.6492 105.8/ 0.7561 n.a. n.a. 37.142491 358.82036 -33.43814 2024-Nov-30 12:00 23 22 37.10 -14 06 06.2 291.050688 49.723727 n.a. n.a. 0.986351439864 0.0677511 0.00110511233417 -0.3223655 97.3222 /T 82.6141 105.8/ 0.7409 n.a. n.a. 37.474337 359.97300 -32.78034 2024-Nov-30 12:10 23 22 37.34 -13 59 49.8 288.951667 47.721024 n.a. n.a. 0.986351707363 0.0667747 0.00110382677439 -0.3171682 97.3596 /T 82.5767 105.7/ 0.7258 n.a. n.a. 37.811899 1.1729277 -32.15605 2024-Nov-30 12:20 23 22 38.14 -13 53 30.2 286.980729 45.697108 n.a. n.a. 0.986351970923 0.0657831 0.00110256108416 -0.3124495 97.3995 /T 82.5370 105.7/ 0.7108 n.a. n.a. 38.157229 2.4166073 -31.56694 2024-Nov-30 12:30 23 22 39.53 -13 47 07.4 285.120935 43.655630 n.a. n.a. 0.986352230482 0.0647762 0.00110131329701 -0.3082324 97.4418 /T 82.4947 105.6/ 0.6959 n.a. n.a. 38.512361 3.7003244 -31.01459 2024-Nov-30 12:40 23 22 41.53 -13 40 41.6 283.357683 41.599711 n.a. n.a. 0.986352485979 0.0637535 0.00110008135610 -0.3045389 97.4868 /T 82.4498 105.6/ 0.6812 n.a. n.a. 38.879283 5.0202024 -30.50046 2024-Nov-30 12:50 23 22 44.18 -13 34 12.9 281.678338 39.532044 n.a. n.a. 0.986352737350 0.0627150 0.00109886311854 -0.3013899 97.5344 /T 82.4023 105.5/ 0.6665 n.a. n.a. 39.259919 6.3722133 -30.02587 2024-Nov-30 13:00 23 22 47.49 -13 27 41.4 280.071925 37.454972 n.a. n.a. 0.986352984530 0.0616603 0.00109765636022 -0.2988051 97.5848 /T 82.3520 105.5/ 0.6520 n.a. n.a. 39.656094 7.7521967 -29.59201 2024-Nov-30 13:10 23 22 51.49 -13 21 07.1 278.528861 35.370548 n.a. n.a. 0.986353227454 0.0605892 0.00109645878032 -0.2968030 97.6380 /T 82.2988 105.4/ 0.6376 n.a. n.a. 40.069518 9.1558835 -29.19989 2024-Nov-30 13:20 23 22 56.21 -13 14 30.3 277.040735 33.280590 n.a. n.a. 0.986353466056 0.0595014 0.00109526800638 -0.2954008 97.6941 /T 82.2427 105.4/ 0.6234 n.a. n.a. 40.501762 10.578925 -28.85035 2024-Nov-30 13:30 23 23 01.66 -13 07 51.0 275.600125 31.186721 n.a. n.a. 0.986353700268 0.0583966 0.00109408159921 -0.2946145 97.7533 /T 82.1837 105.3/ 0.6094 n.a. n.a. 40.954239 12.016929 -28.54405 2024-Nov-30 13:40 23 23 07.86 -13 01 09.3 274.200437 29.090407 n.a. n.a. 0.986353930021 0.0572747 0.00109289705793 -0.2944589 97.8155 /T 82.1216 105.3/ 0.5955 n.a. n.a. 41.428183 13.465490 -28.28143 2024-Nov-30 13:50 23 23 14.84 -12 54 25.3 272.835774 26.992978 n.a. n.a. 0.986354155246 0.0561352 0.00109171182527 -0.2949473 97.8808 /T 82.0563 105.3/ 0.5819 n.a. n.a. 41.924642 14.920238 -28.06274 2024-Nov-30 14:00 23 23 22.61 -12 47 39.2 271.500832 24.895658 n.a. n.a. 0.986354375871 0.0549780 0.00109052329265 -0.2960920 97.9493 /T 81.9879 105.2/ 0.5684 n.a. n.a. 42.444462 16.376870 -27.88801 2024-Nov-30 14:10 23 23 31.18 -12 40 51.0 270.190796 22.799585 n.a. n.a. 0.986354591826 0.0538026 0.00108932880555 -0.2979036 98.0209 /T 81.9163 105.2/ 0.5551 n.a. n.a. 42.988281 17.831190 -27.75707 2024-Nov-30 14:20 23 23 40.58 -12 34 00.8 268.901271 20.705823 n.a. n.a. 0.986354803035 0.0526088 0.00108812566882 -0.3003918 98.0959 /T 81.8414 105.2/ 0.5420 n.a. n.a. 43.556526 19.279152 -27.66953 2024-Nov-30 14:30 23 23 50.80 -12 27 08.8 267.628207 18.615380 n.a. n.a. 0.986355009426 0.0513963 0.00108691115195 -0.3035645 98.1742 /T 81.7633 105.2/ 0.5292 n.a. n.a. 44.149412 20.716888 -27.62483 2024-Nov-30 14:40 23 24 01.88 -12 20 15.1 266.367842 16.529221 n.a. n.a. 0.986355210922 0.0501648 0.00108568249450 -0.3074286 98.2558 /T 81.6817 105.1/ 0.5165 n.a. n.a. 44.766942 22.140740 -27.62221 2024-Nov-30 14:50 23 24 13.81 -12 13 19.7 265.116657 14.448278 n.a. n.a. 0.986355407445 0.0489139 0.00108443691132 -0.3119897 98.3408 /T 81.5968 105.1/ 0.5041 n.a. n.a. 45.408917 23.547288 -27.66071 2024-Nov-30 15:00 23 24 26.61 -12 06 22.7 263.871324 12.373459 n.a. n.a. 0.986355598918 0.0476433 0.00108317159792 -0.3172518 98.4292 /T 81.5085 105.1/ 0.4919 n.a. n.a. 46.074940 24.933368 -27.73927 2024-Nov-30 15:10 23 24 40.28 -11 59 24.2 262.628674 10.305659 n.a. n.a. 0.986355785260 0.0463527 0.00108188373570 -0.3232179 98.5210 /T 81.4168 105.1/ 0.4800 n.a. n.a. 46.764430 26.296089 -27.85663 2024-Nov-30 15:20 23 24 54.82 -11 52 24.3 261.385658 8.245769 n.a. n.a. 0.986355966391 0.0450416 0.00108057049720 -0.3298894 98.6162 /T 81.3216 105.1/ 0.4683 n.a. n.a. 47.476632 27.632840 -28.01147 2024-Nov-30 15:30 23 25 10.25 -11 45 23.1 260.139320 6.194682 n.a. n.a. 0.986356142227 0.0437097 0.00107922905119 -0.3372668 98.7149 /T 81.2230 105.1/ 0.4569 n.a. n.a. 48.210632 28.941294 -28.20233 2024-Nov-30 15:40 23 25 26.57 -11 38 20.7 258.886770 4.153302 n.a. n.a. 0.986356312685 0.0423567 0.00107785656780 -0.3453490 98.8171 /T 81.1209 105.1/ 0.4457 n.a. n.a. 48.965370 30.219411 -28.42767 2024-Nov-30 15:50 23 25 43.78 -11 31 17.1 257.625154 2.122551 n.a. n.a. 0.986356477678 0.0409821 0.00107645022351 -0.3541338 98.9227 /T 81.0154 105.1/ 0.4347 n.a. n.a. 49.739661 31.465429 -28.68591 2024-Nov-30 16:00 23 26 01.88 -11 24 12.3 256.351636 0.103377 n.a. n.a. 0.986356637119 0.0395855 0.00107500720603 -0.3636179 99.0318 /T 80.9064 105.1/ 0.4240 n.a. n.a. 50.532206 32.677854 -28.97542 >..... 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 ***************************************************************************************************************************************************************************************************************************************************