API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 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 Thu Dec 12 03:12:47 2024 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.,Beryl Junc. (Sato) ******************************************************************************* 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 : 246.3025, 37.7377919, 1.56349 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 246.3025,5051.53114,3883.42609 {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 >..... Daylight Cut-off Requested .....< 2024-Nov-30 00:30 C 23 13 23.90 -22 05 38.6 153.706050 25.665162 n.a. n.a. 0.986326280608 0.1074198 0.00120766311831 -0.2525462 92.4704 /T 87.4595 105.3/ 1.7904 n.a. n.a. 23.247604 353.49329 -36.65616 2024-Nov-30 00:40 C 23 13 21.82 -22 01 45.7 156.103127 26.569287 n.a. n.a. 0.986326707885 0.1071537 0.00120666240830 -0.2455962 92.4832 /T 87.4467 105.2/ 1.7729 n.a. n.a. 23.700742 352.52019 -35.39230 2024-Nov-30 00:50 N 23 13 19.43 -21 57 48.8 158.554674 27.398690 n.a. n.a. 0.986327134093 0.1068800 0.00120569011604 -0.2383733 92.4954 /T 87.4346 105.2/ 1.7552 n.a. n.a. 24.159913 351.68781 -34.09830 2024-Nov-30 01:00 N 23 13 16.76 -21 53 47.8 161.058080 28.150128 n.a. n.a. 0.986327559201 0.1065985 0.00120474728337 -0.2309038 92.5071 /T 87.4230 105.1/ 1.7374 n.a. n.a. 24.621915 350.99055 -32.78126 2024-Nov-30 01:10 N 23 13 13.85 -21 49 42.7 163.610035 28.820514 n.a. n.a. 0.986327983178 0.1063094 0.00120383484552 -0.2232147 92.5183 /T 87.4118 105.1/ 1.7193 n.a. n.a. 25.083903 350.42266 -31.44773 2024-Nov-30 01:20 A 23 13 10.72 -21 45 33.3 166.206521 29.406965 n.a. n.a. 0.986328405994 0.1060125 0.00120295362887 -0.2153332 92.5293 /T 87.4008 105.0/ 1.7011 n.a. n.a. 25.543386 349.97845 -30.10374 2024-Nov-30 01:30 A 23 13 07.43 -21 41 19.8 168.842826 29.906855 n.a. n.a. 0.986328827616 0.1057078 0.00120210434869 -0.2072874 92.5402 /T 87.3900 104.9/ 1.6826 n.a. n.a. 25.998212 349.65230 -28.75487 2024-Nov-30 01:40 A 23 13 03.99 -21 37 02.0 171.513586 30.317866 n.a. n.a. 0.986329248014 0.1053953 0.00120128760732 -0.1991057 92.5510 /T 87.3793 104.9/ 1.6640 n.a. n.a. 26.446559 349.43882 -27.40624 2024-Nov-30 01:50 23 13 00.44 -21 32 40.0 174.212844 30.638033 n.a. n.a. 0.986329667156 0.1050749 0.00120050389257 -0.1908167 92.5619 /T 87.3684 104.8/ 1.6452 n.a. n.a. 26.886917 349.33288 -26.06259 2024-Nov-30 02:00 23 12 56.82 -21 28 13.8 176.934138 30.865792 n.a. n.a. 0.986330085010 0.1047465 0.00119975357628 -0.1824495 92.5729 /T 87.3574 104.8/ 1.6263 n.a. n.a. 27.318072 349.32960 -24.72834 2024-Nov-30 02:10 23 12 53.16 -21 23 43.3 179.670609 31.000008 n.a. n.a. 0.986330501544 0.1044103 0.00119903691337 -0.1740333 92.5843 /T 87.3460 104.7/ 1.6073 n.a. n.a. 27.739096 349.42439 -23.40759 2024-Nov-30 02:20 t 23 12 49.49 -21 19 08.6 182.415129 31.040007 n.a. n.a. 0.986330916727 0.1040660 0.00119835404096 -0.1655977 92.5962 /T 87.3342 104.7/ 1.5881 n.a. n.a. 28.149330 349.61294 -22.10416 2024-Nov-30 02:30 23 12 45.86 -21 14 29.8 185.160435 30.985592 n.a. n.a. 0.986331330525 0.1037136 0.00119770497785 -0.1571722 92.6086 /T 87.3218 104.6/ 1.5687 n.a. n.a. 28.548366 349.89120 -20.82168 2024-Nov-30 02:40 23 12 42.29 -21 09 46.7 187.899281 30.837043 n.a. n.a. 0.986331742907 0.1033532 0.00119708962435 -0.1487862 92.6217 /T 87.3088 104.5/ 1.5493 n.a. n.a. 28.936037 350.25537 -19.56355 2024-Nov-30 02:50 23 12 38.82 -21 04 59.6 190.624580 30.595118 n.a. n.a. 0.986332153840 0.1029846 0.00119650776226 -0.1404693 92.6356 /T 87.2949 104.5/ 1.5298 n.a. n.a. 29.312400 350.70184 -18.33301 2024-Nov-30 03:00 23 12 35.49 -21 00 08.4 193.329541 30.261029 n.a. n.a. 0.986332563290 0.1026078 0.00119595905526 -0.1322509 92.6504 /T 87.2801 104.4/ 1.5102 n.a. n.a. 29.677724 351.22722 -17.13315 2024-Nov-30 03:10 23 12 32.33 -20 55 13.2 196.007794 29.836419 n.a. n.a. 0.986332971225 0.1022227 0.00119544304950 -0.1241602 92.6663 /T 87.2643 104.4/ 1.4905 n.a. n.a. 30.032471 351.82824 -15.96692 2024-Nov-30 03:20 23 12 29.37 -20 50 14.0 198.653494 29.323322 n.a. n.a. 0.986333377612 0.1018293 0.00119495917453 -0.1162261 92.6833 /T 87.2474 104.3/ 1.4707 n.a. n.a. 30.377286 352.50179 -14.83717 2024-Nov-30 03:30 23 12 26.64 -20 45 11.0 201.261409 28.724121 n.a. n.a. 0.986333782416 0.1014275 0.00119450674441 -0.1084773 92.7015 /T 87.2291 104.2/ 1.4509 n.a. n.a. 30.712981 353.24483 -13.74662 2024-Nov-30 03:40 23 12 24.19 -20 40 04.3 203.826972 28.041503 n.a. n.a. 0.986334185604 0.1010173 0.00119408495927 -0.1009419 92.7211 /T 87.2096 104.2/ 1.4311 n.a. n.a. 31.040517 354.05437 -12.69790 2024-Nov-30 03:50 23 12 22.03 -20 34 53.8 206.346322 27.278404 n.a. n.a. 0.986334587142 0.1005985 0.00119369290691 -0.0936477 92.7422 /T 87.1885 104.1/ 1.4112 n.a. n.a. 31.360991 354.92748 -11.69354 2024-Nov-30 04:00 23 12 20.21 -20 29 39.7 208.816310 26.437960 n.a. n.a. 0.986334986996 0.1001712 0.00119332956495 -0.0866219 92.7649 /T 87.1659 104.0/ 1.3913 n.a. n.a. 31.675617 355.86120 -10.73597 2024-Nov-30 04:10 23 12 18.75 -20 24 22.2 211.234497 25.523456 n.a. n.a. 0.986335385131 0.0997353 0.00119299380291 -0.0798911 92.7892 /T 87.1416 104.0/ 1.3714 n.a. n.a. 31.985710 356.85257 -9.827520 2024-Nov-30 04:20 23 12 17.68 -20 19 01.2 213.599123 24.538282 n.a. n.a. 0.986335781511 0.0992906 0.00119268438474 -0.0734814 92.8153 /T 87.1155 103.9/ 1.3516 n.a. n.a. 32.292668 357.89858 -8.970392 2024-Nov-30 04:30 23 12 17.04 -20 13 37.0 215.909068 23.485882 n.a. n.a. 0.986336176103 0.0988372 0.00119239997157 -0.0674180 92.8432 /T 87.0876 103.9/ 1.3317 n.a. n.a. 32.597952 358.99614 -8.166678 2024-Nov-30 04:40 23 12 16.84 -20 08 09.6 218.163805 22.369723 n.a. n.a. 0.986336568870 0.0983750 0.00119213912471 -0.0617254 92.8731 /T 87.0577 103.8/ 1.3119 n.a. n.a. 32.903067 0.1420896 -7.418333 2024-Nov-30 04:50 23 12 17.12 -20 02 39.2 220.363341 21.193254 n.a. n.a. 0.986336959777 0.0979038 0.00119190030870 -0.0564273 92.9051 /T 87.0258 103.8/ 1.2922 n.a. n.a. 33.209546 1.3331725 -6.727165 2024-Nov-30 05:00 23 12 17.91 -19 57 05.8 222.508159 19.959880 n.a. n.a. 0.986337348788 0.0974236 0.00119168189472 -0.0515466 92.9391 /T 86.9918 103.7/ 1.2725 n.a. n.a. 33.518923 2.5660279 -6.094817 2024-Nov-30 05:10 23 12 19.22 -19 51 29.7 224.599160 18.672939 n.a. n.a. 0.986337735867 0.0969343 0.00119148216427 -0.0471052 92.9753 /T 86.9555 103.7/ 1.2528 n.a. n.a. 33.832721 3.8371913 -5.522754 2024-Nov-30 05:20 23 12 21.09 -19 45 51.0 226.637600 17.335680 n.a. n.a. 0.986338120976 0.0964359 0.00119129931274 -0.0431240 93.0139 /T 86.9170 103.6/ 1.2333 n.a. n.a. 34.152426 5.1430958 -5.012243 2024-Nov-30 05:30 23 12 23.53 -19 40 09.7 228.625041 15.951248 n.a. n.a. 0.986338504079 0.0959283 0.00119113145343 -0.0396229 93.0547 /T 86.8762 103.6/ 1.2139 n.a. n.a. 34.479471 6.4800790 -4.564346 2024-Nov-30 05:40 23 12 26.57 -19 34 26.1 230.563296 14.522677 n.a. n.a. 0.986338885139 0.0954113 0.00119097662165 -0.0366211 93.0980 /T 86.8329 103.5/ 1.1946 n.a. n.a. 34.815215 7.8443945 -4.179895 2024-Nov-30 05:50 23 12 30.23 -19 28 40.2 232.454386 13.052877 n.a. n.a. 0.986339264117 0.0948849 0.00119083277883 -0.0341362 93.1437 /T 86.7872 103.5/ 1.1754 n.a. n.a. 35.160929 9.2322282 -3.859488 2024-Nov-30 06:00 23 12 34.52 -19 22 52.3 234.300495 11.544635 n.a. n.a. 0.986339640977 0.0943490 0.00119069781694 -0.0321851 93.1919 /T 86.7390 103.4/ 1.1563 n.a. n.a. 35.517776 10.639718 -3.603475 2024-Nov-30 06:10 23 12 39.47 -19 17 02.4 236.103945 10.000612 n.a. n.a. 0.986340015679 0.0938035 0.00119056956294 -0.0307834 93.2427 /T 86.6882 103.4/ 1.1374 n.a. n.a. 35.886799 12.062978 -3.411952 2024-Nov-30 06:20 23 12 45.09 -19 11 10.7 237.867155 8.423339 n.a. n.a. 0.986340388185 0.0932483 0.00119044578331 -0.0299457 93.2962 /T 86.6348 103.3/ 1.1186 n.a. n.a. 36.268905 13.498124 -3.284756 2024-Nov-30 06:30 23 12 51.39 -19 05 17.3 239.592627 6.815226 n.a. n.a. 0.986340758455 0.0926834 0.00119032418870 -0.0296852 93.3523 /T 86.5787 103.3/ 1.1000 n.a. n.a. 36.664860 14.941303 -3.221462 2024-Nov-30 06:40 23 12 58.40 -18 59 22.5 241.282919 5.178563 n.a. n.a. 0.986341126451 0.0921085 0.00119020243866 -0.0300141 93.4111 /T 86.5199 103.3/ 1.0816 n.a. n.a. 37.075274 16.388717 -3.221393 2024-Nov-30 06:50 23 13 06.12 -18 53 26.3 242.940636 3.515520 n.a. n.a. 0.986341492132 0.0915237 0.00119007814643 -0.0309433 93.4726 /T 86.4584 103.2/ 1.0634 n.a. n.a. 37.500598 17.836662 -3.283617 2024-Nov-30 07:00 23 13 14.56 -18 47 28.9 244.568417 1.828162 n.a. n.a. 0.986341855457 0.0909288 0.00118994888370 -0.0324827 93.5369 /T 86.3941 103.2/ 1.0454 n.a. n.a. 37.941123 19.281544 -3.406964 2024-Nov-30 07:10 23 13 23.73 -18 41 30.4 246.168926 0.118447 n.a. n.a. 0.986342216387 0.0903237 0.00118981218556 -0.0346406 93.6039 /T 86.3271 103.2/ 1.0276 n.a. n.a. 38.396973 20.719917 -3.590036 >..... Elevation Cut-off Requested .....< >..... Daylight 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 ***************************************************************************************************************************************************************************************************************************************************