API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 12, 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 04:15:29 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.,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 58.75 -22 13 27.7 153.860208 25.580958 n.a. n.a. 0.986323312278 0.1079300 0.00120841104363 -0.2411511 92.3279 /T 87.6019 105.1/ 1.7904 n.a. n.a. 23.223533 353.43180 -35.40928 2024-Nov-30 00:40 C 23 12 56.64 -22 09 35.1 156.255251 26.480261 n.a. n.a. 0.986323741601 0.1076785 0.00120745609315 -0.2341952 92.3406 /T 87.5893 105.1/ 1.7729 n.a. n.a. 23.677161 352.46453 -34.12590 2024-Nov-30 00:50 N 23 12 54.24 -22 05 38.4 158.704373 27.304815 n.a. n.a. 0.986324169913 0.1074195 0.00120652958262 -0.2269672 92.3527 /T 87.5772 105.0/ 1.7552 n.a. n.a. 24.136656 351.63806 -32.81338 2024-Nov-30 01:00 N 23 12 51.55 -22 01 37.7 161.204940 28.051397 n.a. n.a. 0.986324597184 0.1071528 0.00120563255110 -0.2194933 92.3642 /T 87.5657 105.0/ 1.7374 n.a. n.a. 24.598825 350.94673 -31.47893 2024-Nov-30 01:10 N 23 12 48.63 -21 57 32.8 163.753621 28.716946 n.a. n.a. 0.986325023385 0.1068785 0.00120476593107 -0.2118003 92.3754 /T 87.5546 104.9/ 1.7193 n.a. n.a. 25.060836 350.38476 -30.12922 2024-Nov-30 01:20 A 23 12 45.50 -21 53 23.8 166.346387 29.298604 n.a. n.a. 0.986325448483 0.1065966 0.00120393054607 -0.2039158 92.3863 /T 87.5438 104.9/ 1.7011 n.a. n.a. 25.520212 349.94640 -28.77034 2024-Nov-30 01:30 A 23 12 42.19 -21 49 10.5 168.978522 29.793773 n.a. n.a. 0.986325872448 0.1063069 0.00120312710866 -0.1958676 92.3971 /T 87.5331 104.8/ 1.6826 n.a. n.a. 25.974814 349.62601 -27.40793 2024-Nov-30 01:40 A 23 12 38.74 -21 44 53.0 171.644666 30.200162 n.a. n.a. 0.986326295249 0.1060095 0.00120235621847 -0.1876842 92.4078 /T 87.5224 104.7/ 1.6640 n.a. n.a. 26.422833 349.41817 -26.04716 2024-Nov-30 01:50 23 12 35.19 -21 40 31.2 174.338874 30.515835 n.a. n.a. 0.986326716855 0.1057043 0.00120161836064 -0.1793941 92.4186 /T 87.5116 104.7/ 1.6452 n.a. n.a. 26.862771 349.31773 -24.69280 2024-Nov-30 02:00 23 12 31.56 -21 36 05.2 177.054709 30.739252 n.a. n.a. 0.986327137235 0.1053913 0.00120091390448 -0.1710264 92.4296 /T 87.5007 104.6/ 1.6263 n.a. n.a. 27.293429 349.31980 -23.34925 2024-Nov-30 02:10 23 12 27.90 -21 31 35.0 179.785343 30.869306 n.a. n.a. 0.986327556356 0.1050704 0.00120024310239 -0.1626105 92.4409 /T 87.4894 104.6/ 1.6073 n.a. n.a. 27.713891 349.41977 -22.02063 2024-Nov-30 02:20 t 23 12 24.23 -21 27 00.6 182.523687 30.905346 n.a. n.a. 0.986327974187 0.1047416 0.00119960608906 -0.1541756 92.4527 /T 87.4776 104.5/ 1.5881 n.a. n.a. 28.123506 349.61333 -20.71075 2024-Nov-30 02:30 23 12 20.60 -21 22 22.0 185.262528 30.847194 n.a. n.a. 0.986328390697 0.1044048 0.00119900288100 -0.1457514 92.4651 /T 87.4653 104.4/ 1.5687 n.a. n.a. 28.521880 349.89642 -19.42320 2024-Nov-30 02:40 23 12 17.03 -21 17 39.2 187.994674 30.695147 n.a. n.a. 0.986328805853 0.1040601 0.00119843337630 -0.1373673 92.4781 /T 87.4523 104.4/ 1.5493 n.a. n.a. 28.908853 350.26521 -18.16137 2024-Nov-30 02:50 23 12 13.57 -21 12 52.3 190.713093 30.449977 n.a. n.a. 0.986329219622 0.1037072 0.00119789735469 -0.1290527 92.4920 /T 87.4385 104.3/ 1.5298 n.a. n.a. 29.284491 350.71612 -16.92844 2024-Nov-30 03:00 23 12 10.25 -21 08 01.4 193.411055 30.112906 n.a. n.a. 0.986329631973 0.1033463 0.00119739447793 -0.1208372 92.5068 /T 87.4237 104.3/ 1.5102 n.a. n.a. 29.649068 351.24573 -15.72748 2024-Nov-30 03:10 23 12 07.09 -21 03 06.5 196.082248 29.685580 n.a. n.a. 0.986330042872 0.1029772 0.00119692429035 -0.1127497 92.5226 /T 87.4080 104.2/ 1.4905 n.a. n.a. 30.003054 351.85079 -14.56140 2024-Nov-30 03:20 23 12 04.14 -20 58 07.6 198.720888 29.170036 n.a. n.a. 0.986330452288 0.1025999 0.00119648621982 -0.1048193 92.5395 /T 87.3910 104.1/ 1.4707 n.a. n.a. 30.347098 352.52815 -13.43297 2024-Nov-30 03:30 23 12 01.42 -20 53 04.9 201.321793 28.568656 n.a. n.a. 0.986330860185 0.1022143 0.00119607957899 -0.0970745 92.5577 /T 87.3728 104.1/ 1.4509 n.a. n.a. 30.682015 353.27478 -12.34487 2024-Nov-30 03:40 23 11 58.98 -20 47 58.4 203.880448 27.884118 n.a. n.a. 0.986331266532 0.1018204 0.00119570356663 -0.0895433 92.5773 /T 87.3533 104.0/ 1.4311 n.a. n.a. 31.008767 354.08770 -11.29969 2024-Nov-30 03:50 23 11 56.84 -20 42 48.2 206.393034 27.119351 n.a. n.a. 0.986331671295 0.1014182 0.00119535726945 -0.0822537 92.5984 /T 87.3322 104.0/ 1.4112 n.a. n.a. 31.328450 354.96395 -10.29989 2024-Nov-30 04:00 23 11 55.03 -20 37 34.5 208.856441 26.277481 n.a. n.a. 0.986332074440 0.1010074 0.00119503966410 -0.0752327 92.6210 /T 87.3096 103.9/ 1.3913 n.a. n.a. 31.642280 355.90059 -9.347841 2024-Nov-30 04:10 23 11 53.58 -20 32 17.3 211.268259 25.361778 n.a. n.a. 0.986332475932 0.1005882 0.00119474961932 -0.0685068 92.6453 /T 87.2854 103.8/ 1.3714 n.a. n.a. 31.951566 356.89465 -8.445806 2024-Nov-30 04:20 23 11 52.54 -20 26 56.6 213.626751 24.375618 n.a. n.a. 0.986332875738 0.1001604 0.00119448589854 -0.0621022 92.6714 /T 87.2593 103.8/ 1.3516 n.a. n.a. 32.257704 357.94311 -7.595936 2024-Nov-30 04:30 23 11 51.91 -20 21 32.8 215.930817 23.322430 n.a. n.a. 0.986333273822 0.0997239 0.00119424716256 -0.0560439 92.6993 /T 87.2314 103.7/ 1.3317 n.a. n.a. 32.562148 359.04289 -6.800261 2024-Nov-30 04:40 23 11 51.73 -20 16 05.7 218.179939 22.205664 n.a. n.a. 0.986333670150 0.0992787 0.00119403197248 -0.0503564 92.7292 /T 87.2015 103.7/ 1.3119 n.a. n.a. 32.866398 0.1908105 -6.060676 2024-Nov-30 04:50 23 11 52.04 -20 10 35.7 220.374130 21.028753 n.a. n.a. 0.986334064687 0.0988248 0.00119383879294 -0.0450634 92.7611 /T 87.1696 103.6/ 1.2922 n.a. n.a. 33.171977 1.3836290 -5.378928 2024-Nov-30 05:00 23 11 52.84 -20 05 02.8 222.513876 19.795085 n.a. n.a. 0.986334457397 0.0983620 0.00119366599545 -0.0401877 92.7951 /T 87.1356 103.6/ 1.2725 n.a. n.a. 33.480413 2.6179822 -4.756605 2024-Nov-30 05:10 23 11 54.18 -19 59 27.1 224.600074 18.507982 n.a. n.a. 0.986334848245 0.0978902 0.00119351186194 -0.0357511 92.8313 /T 87.0994 103.5/ 1.2528 n.a. n.a. 33.793215 3.8904084 -4.195114 2024-Nov-30 05:20 23 11 56.07 -19 53 48.7 226.633975 17.170677 n.a. n.a. 0.986335237194 0.0974095 0.00119337458853 -0.0317745 92.8698 /T 87.0609 103.5/ 1.2333 n.a. n.a. 34.111859 5.1973452 -3.695674 2024-Nov-30 05:30 23 11 58.53 -19 48 07.9 228.617132 15.786301 n.a. n.a. 0.986335624209 0.0969197 0.00119325228949 -0.0282778 92.9107 /T 87.0201 103.4/ 1.2139 n.a. n.a. 34.437767 6.5351360 -3.259292 2024-Nov-30 05:40 23 12 01.59 -19 42 24.7 230.551347 14.357873 n.a. n.a. 0.986336009251 0.0964207 0.00119314300125 -0.0252800 92.9539 /T 86.9769 103.4/ 1.1946 n.a. n.a. 34.772286 7.9000422 -2.886759 2024-Nov-30 05:50 23 12 05.27 -19 36 39.4 232.438629 12.888290 n.a. n.a. 0.986336392285 0.0959124 0.00119304468661 -0.0227988 92.9996 /T 86.9312 103.3/ 1.1754 n.a. n.a. 35.116672 9.2882593 -2.578628 2024-Nov-30 06:00 23 12 09.59 -19 30 51.9 234.281151 11.380327 n.a. n.a. 0.986336773273 0.0953948 0.00119295523916 -0.0208510 93.0478 /T 86.8830 103.3/ 1.1563 n.a. n.a. 35.472077 10.695937 -2.335212 2024-Nov-30 06:10 23 12 14.56 -19 25 02.6 236.081218 9.836632 n.a. n.a. 0.986337152178 0.0948678 0.00119287248761 -0.0194521 93.0986 /T 86.8322 103.2/ 1.1374 n.a. n.a. 35.839529 12.119201 -2.156572 2024-Nov-30 06:20 23 12 20.20 -19 19 11.4 237.841238 8.259726 n.a. n.a. 0.986337528960 0.0943312 0.00119279420048 -0.0186166 93.1520 /T 86.7788 103.2/ 1.1186 n.a. n.a. 36.219924 13.554183 -2.042515 2024-Nov-30 06:30 23 12 26.52 -19 13 18.7 239.563697 6.652010 n.a. n.a. 0.986337903583 0.0937851 0.00119271809067 -0.0183578 93.2080 /T 86.7228 103.1/ 1.1000 n.a. n.a. 36.614013 14.997044 -1.992594 2024-Nov-30 06:40 23 12 33.55 -19 07 24.4 241.251142 5.015762 n.a. n.a. 0.986338276006 0.0932292 0.00119264182011 -0.0186877 93.2668 /T 86.6641 103.1/ 1.0816 n.a. n.a. 37.022394 16.444006 -2.006109 2024-Nov-30 06:50 23 12 41.28 -19 01 28.8 242.906162 3.353148 n.a. n.a. 0.986338646191 0.0926636 0.00119256300465 -0.0196173 93.3282 /T 86.6026 103.1/ 1.0634 n.a. n.a. 37.445509 17.891379 -2.082111 2024-Nov-30 07:00 23 12 49.74 -18 55 32.1 244.531384 1.666220 n.a. n.a. 0.986339014098 0.0920880 0.00119247921884 -0.0211563 93.3924 /T 86.5384 103.0/ 1.0454 n.a. n.a. 37.883636 19.335591 -2.219419 2024-Nov-30 07:10 23 12 58.93 -18 49 34.3 246.129461 -0.043068 n.a. n.a. 0.986339379687 0.0915025 0.00119238800076 -0.0233131 93.4594 /T 86.4714 103.0/ 1.0276 n.a. n.a. 38.336889 20.773210 -2.416625 >..... 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 ***************************************************************************************************************************************************************************************************************************************************