API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 2024 MMS-2 Spacecraft / (Earth) -140483 https://www.nasa.gov/mission_pages/mms/index.html MMS 2 Magnetospheric Multiscale (MMS) mission: the second 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 03:50:36 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-2 (spacecraft) (-140483) {source: MMS-2} 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 12 54.57 -22 14 48.0 153.886068 25.566316 n.a. n.a. 0.986322817261 0.1080495 0.00120863806950 -0.2390140 92.3040 /T 87.6258 105.1/ 1.7904 n.a. n.a. 23.217890 353.42703 -35.17027 2024-Nov-30 00:40 C 23 12 52.46 -22 10 55.5 156.280743 26.464805 n.a. n.a. 0.986323247061 0.1077999 0.00120769169201 -0.2320609 92.3167 /T 87.6132 105.0/ 1.7729 n.a. n.a. 23.671468 352.46060 -33.88392 2024-Nov-30 00:50 N 23 12 50.05 -22 06 58.9 158.729430 27.288540 n.a. n.a. 0.986323675859 0.1075428 0.00120677374274 -0.2248359 92.3287 /T 87.6012 105.0/ 1.7552 n.a. n.a. 24.130889 351.63497 -32.56863 2024-Nov-30 01:00 N 23 12 47.37 -22 02 58.3 161.229492 28.034303 n.a. n.a. 0.986324103624 0.1072780 0.00120588526018 -0.2173651 92.3403 /T 87.5897 104.9/ 1.7374 n.a. n.a. 24.592963 350.94450 -31.23162 2024-Nov-30 01:10 N 23 12 44.44 -21 58 53.4 163.777594 28.699037 n.a. n.a. 0.986324530324 0.1070056 0.00120502717623 -0.2096754 92.3514 /T 87.5786 104.9/ 1.7193 n.a. n.a. 25.054860 350.38338 -29.87958 2024-Nov-30 01:20 A 23 12 41.31 -21 54 44.4 166.369705 29.279889 n.a. n.a. 0.986324955931 0.1067255 0.00120420031392 -0.2017943 92.3623 /T 87.5678 104.8/ 1.7011 n.a. n.a. 25.514105 349.94586 -28.51864 2024-Nov-30 01:30 A 23 12 38.00 -21 50 31.2 169.001109 29.774264 n.a. n.a. 0.986325380412 0.1064377 0.00120340538520 -0.1937497 92.3730 /T 87.5571 104.8/ 1.6826 n.a. n.a. 25.968562 349.62630 -27.15441 2024-Nov-30 01:40 A 23 12 34.56 -21 46 13.8 171.666445 30.179878 n.a. n.a. 0.986325803736 0.1061422 0.00120264298923 -0.1855699 92.3837 /T 87.5464 104.7/ 1.6640 n.a. n.a. 26.416422 349.41928 -25.79209 2024-Nov-30 01:50 23 12 31.00 -21 41 52.1 174.359774 30.494798 n.a. n.a. 0.986326225873 0.1058389 0.00120191361060 -0.1772836 92.3945 /T 87.5357 104.7/ 1.6452 n.a. n.a. 26.856191 349.31963 -24.43644 2024-Nov-30 02:00 23 12 27.38 -21 37 26.1 177.074660 30.717490 n.a. n.a. 0.986326646791 0.1055277 0.00120121761814 -0.1689199 92.4055 /T 87.5247 104.6/ 1.6263 n.a. n.a. 27.286672 349.32247 -23.09188 2024-Nov-30 02:10 23 12 23.72 -21 32 56.0 179.804282 30.846850 n.a. n.a. 0.986327066458 0.1052087 0.00120055526373 -0.1605080 92.4169 /T 87.5134 104.5/ 1.6073 n.a. n.a. 27.706949 349.42319 -21.76250 2024-Nov-30 02:20 t 23 12 20.05 -21 28 21.6 182.541558 30.882230 n.a. n.a. 0.986327484843 0.1048818 0.00119992668165 -0.1520773 92.4287 /T 87.5017 104.5/ 1.5881 n.a. n.a. 28.116376 349.61747 -20.45212 2024-Nov-30 02:30 23 12 16.42 -21 23 43.1 185.279284 30.823457 n.a. n.a. 0.986327901913 0.1045470 0.00119933188796 -0.1436573 92.4410 /T 87.4894 104.4/ 1.5687 n.a. n.a. 28.514557 349.90125 -19.16433 2024-Nov-30 02:40 23 12 12.86 -21 19 00.4 188.010275 30.670831 n.a. n.a. 0.986328317638 0.1042041 0.00119877078037 -0.1352776 92.4541 /T 87.4763 104.4/ 1.5493 n.a. n.a. 28.901335 350.27071 -17.90251 2024-Nov-30 02:50 23 12 09.40 -21 14 13.6 190.727510 30.425125 n.a. n.a. 0.986328731984 0.1038532 0.00119824313822 -0.1269675 92.4679 /T 87.4625 104.3/ 1.5298 n.a. n.a. 29.276778 350.72226 -16.66983 2024-Nov-30 03:00 23 12 06.08 -21 09 22.7 193.424269 30.087562 n.a. n.a. 0.986329144919 0.1034943 0.00119774862292 -0.1187565 92.4827 /T 87.4478 104.2/ 1.5102 n.a. n.a. 29.641160 351.25248 -15.46934 2024-Nov-30 03:10 23 12 02.92 -21 04 27.9 196.094251 29.659791 n.a. n.a. 0.986329556411 0.1031271 0.00119728677849 -0.1106736 92.4985 /T 87.4320 104.2/ 1.4905 n.a. n.a. 29.994952 351.85811 -14.30395 2024-Nov-30 03:20 23 11 59.97 -20 59 29.1 198.731680 29.143847 n.a. n.a. 0.986329966426 0.1027518 0.00119685703253 -0.1027479 92.5154 /T 87.4151 104.1/ 1.4707 n.a. n.a. 30.338803 352.53602 -13.17642 2024-Nov-30 03:30 23 11 57.26 -20 54 26.5 201.331386 28.542111 n.a. n.a. 0.986330374932 0.1023682 0.00119645869741 -0.0950077 92.5336 /T 87.3969 104.0/ 1.4509 n.a. n.a. 30.673528 353.28316 -12.08942 2024-Nov-30 03:40 23 11 54.82 -20 49 20.1 203.888859 27.857263 n.a. n.a. 0.986330781895 0.1019763 0.00119609097172 -0.0874814 92.5532 /T 87.3774 104.0/ 1.4311 n.a. n.a. 31.000090 354.09656 -11.04552 2024-Nov-30 03:50 23 11 52.68 -20 44 10.0 206.400289 27.092229 n.a. n.a. 0.986331187282 0.1015760 0.00119575294197 -0.0801966 92.5743 /T 87.3563 103.9/ 1.4112 n.a. n.a. 31.319586 354.97326 -10.04717 2024-Nov-30 04:00 23 11 50.88 -20 38 56.3 208.862572 26.250131 n.a. n.a. 0.986331591059 0.1011673 0.00119544358465 -0.0731804 92.5969 /T 87.3337 103.9/ 1.3913 n.a. n.a. 31.633228 355.91031 -9.096735 2024-Nov-30 04:10 23 11 49.44 -20 33 39.1 211.273302 25.334240 n.a. n.a. 0.986331993191 0.1007501 0.00119516176843 -0.0664594 92.6212 /T 87.3094 103.8/ 1.3714 n.a. n.a. 31.942327 356.90475 -8.196463 2024-Nov-30 04:20 23 11 48.39 -20 28 18.6 213.630748 24.347927 n.a. n.a. 0.986332393646 0.1003244 0.00119490625668 -0.0600596 92.6473 /T 87.2834 103.8/ 1.3516 n.a. n.a. 32.248277 357.95354 -7.348493 2024-Nov-30 04:30 23 11 47.77 -20 22 54.8 215.933810 23.294619 n.a. n.a. 0.986332792387 0.0998900 0.00119467571016 -0.0540062 92.6752 /T 87.2555 103.7/ 1.3317 n.a. n.a. 32.552531 359.05362 -6.554842 2024-Nov-30 04:40 23 11 47.60 -20 17 27.9 218.181974 22.177763 n.a. n.a. 0.986333189381 0.0994469 0.00119446869004 -0.0483236 92.7051 /T 87.2256 103.6/ 1.3119 n.a. n.a. 32.856588 0.2018026 -5.817394 2024-Nov-30 04:50 23 11 47.91 -20 11 58.0 220.375255 21.000790 n.a. n.a. 0.986333584591 0.0989951 0.00119428366095 -0.0430355 92.7370 /T 87.1937 103.6/ 1.2922 n.a. n.a. 33.161970 1.3948453 -5.137885 2024-Nov-30 05:00 23 11 48.72 -20 06 25.1 222.514136 19.767085 n.a. n.a. 0.986333977984 0.0985345 0.00119411899452 -0.0381646 92.7710 /T 87.1597 103.5/ 1.2725 n.a. n.a. 33.470200 2.6293851 -4.517891 2024-Nov-30 05:10 23 11 50.06 -20 00 49.5 224.599515 18.479966 n.a. n.a. 0.986334369523 0.0980649 0.00119397297284 -0.0337327 92.8072 /T 87.1235 103.5/ 1.2528 n.a. n.a. 33.782788 3.9019608 -3.958811 2024-Nov-30 05:20 23 11 51.95 -19 55 11.3 226.632642 17.142664 n.a. n.a. 0.986334759172 0.0975863 0.00119384379220 -0.0297609 92.8457 /T 87.0850 103.4/ 1.2333 n.a. n.a. 34.101208 5.2090105 -3.461852 2024-Nov-30 05:30 23 11 54.42 -19 49 30.6 228.615067 15.758308 n.a. n.a. 0.986335146895 0.0970987 0.00119372956710 -0.0262689 92.8865 /T 87.0442 103.4/ 1.2139 n.a. n.a. 34.426878 6.5468786 -3.028013 2024-Nov-30 05:40 23 11 57.49 -19 43 47.6 230.548593 14.329914 n.a. n.a. 0.986335532655 0.0966019 0.00119362833422 -0.0232756 92.9298 /T 87.0010 103.3/ 1.1946 n.a. n.a. 34.761143 7.9118279 -2.658076 2024-Nov-30 05:50 23 12 01.17 -19 38 02.3 232.435224 12.860377 n.a. n.a. 0.986335916415 0.0960959 0.00119353805669 -0.0207990 92.9755 /T 86.9553 103.3/ 1.1754 n.a. n.a. 35.105258 9.3000554 -2.352586 2024-Nov-30 06:00 23 12 05.49 -19 32 15.0 234.277132 11.352469 n.a. n.a. 0.986336298139 0.0955806 0.00119345662842 -0.0188556 93.0237 /T 86.9071 103.2/ 1.1563 n.a. n.a. 35.460371 10.707712 -2.111851 2024-Nov-30 06:10 23 12 10.46 -19 26 25.8 236.076621 9.808837 n.a. n.a. 0.986336677788 0.0950559 0.00119338187855 -0.0174610 93.0744 /T 86.8563 103.2/ 1.1374 n.a. n.a. 35.827508 12.130928 -1.935924 2024-Nov-30 06:20 23 12 16.11 -19 20 34.8 237.836094 8.232001 n.a. n.a. 0.986337055325 0.0945217 0.00119331157599 -0.0166297 93.1278 /T 86.8030 103.2/ 1.1186 n.a. n.a. 36.207564 13.565835 -1.824609 2024-Nov-30 06:30 23 12 22.44 -19 14 42.1 239.558036 6.624358 n.a. n.a. 0.986337430711 0.0939780 0.00119324343409 -0.0163750 93.1838 /T 86.7470 103.1/ 1.1000 n.a. n.a. 36.601286 15.008597 -1.777453 2024-Nov-30 06:40 23 12 29.46 -19 08 48.0 241.244990 4.988186 n.a. n.a. 0.986337803908 0.0934245 0.00119317511531 -0.0167089 93.2426 /T 86.6882 103.1/ 1.0816 n.a. n.a. 37.009271 16.455440 -1.793753 2024-Nov-30 06:50 23 12 37.20 -19 02 52.6 242.899546 3.325649 n.a. n.a. 0.986338174876 0.0928613 0.00119310423603 -0.0176423 93.3040 /T 86.6268 103.1/ 1.0634 n.a. n.a. 37.431958 17.902676 -1.872557 2024-Nov-30 07:00 23 12 45.67 -18 56 56.0 244.524326 1.638798 n.a. n.a. 0.986338543576 0.0922882 0.00119302837140 -0.0191850 93.3682 /T 86.5626 103.0/ 1.0454 n.a. n.a. 37.869624 19.346736 -2.012683 2024-Nov-30 07:10 23 12 54.86 -18 50 58.4 246.121981 -0.070415 n.a. n.a. 0.986338909968 0.0917052 0.00119294506005 -0.0213453 93.4352 /T 86.4956 103.0/ 1.0276 n.a. n.a. 38.322380 20.784192 -2.212720 >..... 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 ***************************************************************************************************************************************************************************************************************************************************