API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 2024 MMS-4 Spacecraft / (Earth) -140485 https://www.nasa.gov/mission_pages/mms/index.html MMS 4 Magnetospheric Multiscale (MMS) mission: the fourth 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 02:31:36 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-4 (spacecraft) (-140485) {source: MMS-4} 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 09 36.11 -23 16 29.1 155.088516 24.891435 n.a. n.a. 0.986299289026 0.1115004 0.00121140075635 -0.1481277 91.1851 /T 88.7446 103.9/ 1.7904 n.a. n.a. 23.160501 353.14917 -23.59548 2024-Nov-30 00:40 C 23 09 33.92 -23 12 37.3 157.465928 25.752415 n.a. n.a. 0.986299732662 0.1113627 0.00121081926447 -0.1411718 91.1971 /T 88.7325 103.8/ 1.7729 n.a. n.a. 23.617542 352.22825 -22.21639 2024-Nov-30 00:50 N 23 09 31.43 -23 08 41.4 159.894332 26.538499 n.a. n.a. 0.986300175745 0.1112177 0.00121026620101 -0.1339500 91.2086 /T 88.7211 103.8/ 1.7552 n.a. n.a. 24.079295 351.44819 -20.82064 2024-Nov-30 01:00 N 23 09 28.68 -23 04 41.3 162.370917 27.246650 n.a. n.a. 0.986300618245 0.1110653 0.00120974258040 -0.1264884 91.2196 /T 88.7102 103.7/ 1.7374 n.a. n.a. 24.542653 350.80297 -19.41595 2024-Nov-30 01:10 N 23 09 25.70 -23 00 37.1 164.892222 27.873999 n.a. n.a. 0.986301060133 0.1109055 0.00120924931058 -0.1188139 91.2302 /T 88.6995 103.7/ 1.7193 n.a. n.a. 25.004880 350.28647 -18.00921 2024-Nov-30 01:20 A 23 09 22.53 -22 56 28.7 167.454138 28.417894 n.a. n.a. 0.986301501378 0.1107384 0.00120878719088 -0.1109538 91.2406 /T 88.6891 103.6/ 1.7011 n.a. n.a. 25.463594 349.89272 -16.60657 2024-Nov-30 01:30 A 23 09 19.19 -22 52 16.0 170.051937 28.875951 n.a. n.a. 0.986301941952 0.1105638 0.00120835690999 -0.1029359 91.2510 /T 88.6788 103.6/ 1.6826 n.a. n.a. 25.916758 349.61588 -15.21352 2024-Nov-30 01:40 A 23 09 15.73 -22 47 59.1 172.680309 29.246093 n.a. n.a. 0.986302381824 0.1103819 0.00120795904409 -0.0947886 91.2613 /T 88.6685 103.5/ 1.6640 n.a. n.a. 26.362660 349.45039 -13.83496 2024-Nov-30 01:50 23 09 12.17 -22 43 37.9 175.333435 29.526599 n.a. n.a. 0.986302820965 0.1101925 0.00120759405536 -0.0865402 91.2717 /T 88.6581 103.5/ 1.6452 n.a. n.a. 26.799899 349.39098 -12.47527 2024-Nov-30 02:00 23 09 08.55 -22 39 12.5 178.005070 29.716134 n.a. n.a. 0.986303259345 0.1099957 0.00120726229082 -0.0782198 91.2825 /T 88.6474 103.4/ 1.6263 n.a. n.a. 27.227368 349.43266 -11.13838 2024-Nov-30 02:10 t 23 09 04.92 -22 34 42.8 180.688653 29.813782 n.a. n.a. 0.986303696934 0.1097915 0.00120696398132 -0.0698564 91.2936 /T 88.6363 103.3/ 1.6073 n.a. n.a. 27.644234 349.57077 -9.827848 2024-Nov-30 02:20 e 23 09 01.29 -22 30 09.0 183.377421 29.819067 n.a. n.a. 0.986304133701 0.1095797 0.00120669924073 -0.0614791 91.3051 /T 88.6248 103.3/ 1.5881 n.a. n.a. 28.049931 349.80093 -8.546892 2024-Nov-30 02:30 23 08 57.71 -22 25 31.0 186.064539 29.731962 n.a. n.a. 0.986304569617 0.1093604 0.00120646806578 -0.0531173 91.3173 /T 88.6126 103.2/ 1.5687 n.a. n.a. 28.444133 350.11902 -7.298467 2024-Nov-30 02:40 23 08 54.21 -22 20 48.8 188.743236 29.552891 n.a. n.a. 0.986305004652 0.1091336 0.00120627033562 -0.0448001 91.3303 /T 88.5997 103.2/ 1.5493 n.a. n.a. 28.826747 350.52118 -6.085290 2024-Nov-30 02:50 23 08 50.83 -22 16 02.6 191.406928 29.282720 n.a. n.a. 0.986305438774 0.1088993 0.00120610581220 -0.0365569 91.3441 /T 88.5859 103.1/ 1.5298 n.a. n.a. 29.197894 351.00379 -4.909890 2024-Nov-30 03:00 23 08 47.60 -22 11 12.3 194.049344 28.922736 n.a. n.a. 0.986305871954 0.1086573 0.00120597414061 -0.0284166 91.3588 /T 88.5712 103.0/ 1.5102 n.a. n.a. 29.557896 351.56338 -3.774631 2024-Nov-30 03:10 23 08 44.55 -22 06 18.1 196.664629 28.474622 n.a. n.a. 0.986306304162 0.1084077 0.00120587484977 -0.0204082 91.3746 /T 88.5554 103.0/ 1.4905 n.a. n.a. 29.907260 352.19666 -2.681742 2024-Nov-30 03:20 23 08 41.72 -22 01 19.9 199.247437 27.940417 n.a. n.a. 0.986306735365 0.1081505 0.00120580735346 -0.0125601 91.3916 /T 88.5384 102.9/ 1.4707 n.a. n.a. 30.246660 352.90047 -1.633337 2024-Nov-30 03:30 23 08 39.14 -21 56 18.0 201.793002 27.322480 n.a. n.a. 0.986307165534 0.1078857 0.00120577095154 -0.0049006 91.4099 /T 88.5201 102.9/ 1.4509 n.a. n.a. 30.576927 353.67173 -0.631428 2024-Nov-30 03:40 23 08 36.84 -21 51 12.4 204.297178 26.623439 n.a. n.a. 0.986307594638 0.1076131 0.00120576483148 0.0025426 91.4295 /T 88.5004 102.8/ 1.4311 n.a. n.a. 30.899031 354.50741 0.3220634 2024-Nov-30 03:50 23 08 34.85 -21 46 03.2 206.756477 25.846153 n.a. n.a. 0.986308022646 0.1073327 0.00120578807019 0.0097420 91.4507 /T 88.4793 102.7/ 1.4112 n.a. n.a. 31.214061 355.40454 1.2252989 2024-Nov-30 04:00 23 08 33.21 -21 40 50.4 209.168067 24.993655 n.a. n.a. 0.986308449526 0.1070446 0.00120583963605 0.0166710 91.4735 /T 88.4565 102.7/ 1.3913 n.a. n.a. 31.523215 356.36014 2.0765234 2024-Nov-30 04:10 23 08 31.95 -21 35 34.3 211.529764 24.069113 n.a. n.a. 0.986308875247 0.1067487 0.00120591839116 0.0233032 91.4979 /T 88.4320 102.6/ 1.3714 n.a. n.a. 31.827777 357.37121 2.8740649 2024-Nov-30 04:20 23 08 31.09 -21 30 14.8 213.840008 23.075783 n.a. n.a. 0.986309299777 0.1064449 0.00120602309390 0.0296133 91.5242 /T 88.4058 102.6/ 1.3516 n.a. n.a. 32.129102 358.43472 3.6163389 2024-Nov-30 04:30 23 08 30.66 -21 24 52.2 216.097826 22.016974 n.a. n.a. 0.986309723085 0.1061332 0.00120615240174 0.0355764 91.5523 /T 88.3776 102.5/ 1.3317 n.a. n.a. 32.428597 359.54757 4.3018557 2024-Nov-30 04:40 23 08 30.69 -21 19 26.6 218.302782 20.896006 n.a. n.a. 0.986310145139 0.1058135 0.00120630487419 0.0411685 91.5824 /T 88.3476 102.4/ 1.3119 n.a. n.a. 32.727702 0.7065887 4.9292289 2024-Nov-30 04:50 23 08 31.20 -21 13 58.0 220.454931 19.716182 n.a. n.a. 0.986310565908 0.1054859 0.00120647897592 0.0463663 91.6145 /T 88.3154 102.4/ 1.2922 n.a. n.a. 33.027871 1.9085279 5.4971864 2024-Nov-30 05:00 23 08 32.23 -21 08 26.7 222.554765 18.480763 n.a. n.a. 0.986310985357 0.1051502 0.00120667308035 0.0511476 91.6487 /T 88.2812 102.3/ 1.2725 n.a. n.a. 33.330555 3.1500474 6.0045825 2024-Nov-30 05:10 23 08 33.79 -21 02 52.7 224.603157 17.192943 n.a. n.a. 0.986311403457 0.1048065 0.00120688547301 0.0554908 91.6852 /T 88.2448 102.3/ 1.2528 n.a. n.a. 33.637180 4.4277173 6.4504104 2024-Nov-30 05:20 23 08 35.91 -20 57 16.3 226.601309 15.855834 n.a. n.a. 0.986311820173 0.1044546 0.00120711435544 0.0593756 91.7239 /T 88.2061 102.2/ 1.2333 n.a. n.a. 33.949131 5.7380211 6.8338154 2024-Nov-30 05:30 23 08 38.60 -20 51 37.5 228.550707 14.472450 n.a. n.a. 0.986312235472 0.1040945 0.00120735784908 0.0627825 91.7649 /T 88.1650 102.2/ 1.2139 n.a. n.a. 34.267732 7.0773629 7.1541075 2024-Nov-30 05:40 23 08 41.90 -20 45 56.5 230.453068 13.045699 n.a. n.a. 0.986312649323 0.1037262 0.00120761399929 0.0656930 91.8082 /T 88.1216 102.1/ 1.1946 n.a. n.a. 34.594229 8.4420797 7.4107737 2024-Nov-30 05:50 23 08 45.81 -20 40 13.5 232.310307 11.578375 n.a. n.a. 0.986313061692 0.1033496 0.00120788077963 0.0680897 91.8541 /T 88.0758 102.1/ 1.1754 n.a. n.a. 34.929778 9.8284577 7.6034881 2024-Nov-30 06:00 23 08 50.36 -20 34 28.5 234.124494 10.073154 n.a. n.a. 0.986313472545 0.1029647 0.00120815609612 0.0699564 91.9024 /T 88.0275 102.1/ 1.1563 n.a. n.a. 35.275424 11.232751 7.7321217 2024-Nov-30 06:10 23 08 55.57 -20 28 41.8 235.897829 8.532594 n.a. n.a. 0.986313881848 0.1025714 0.00120843779168 0.0712780 91.9532 /T 87.9766 102.0/ 1.1374 n.a. n.a. 35.632093 12.651206 7.7967490 2024-Nov-30 06:20 23 09 01.44 -20 22 53.6 237.632609 6.959133 n.a. n.a. 0.986314289568 0.1021695 0.00120872365071 0.0720403 92.0067 /T 87.9232 102.0/ 1.1186 n.a. n.a. 36.000579 14.080082 7.7976532 2024-Nov-30 06:30 23 09 07.99 -20 17 03.9 239.331213 5.355092 n.a. n.a. 0.986314695671 0.1017592 0.00120901140369 0.0722305 92.0627 /T 87.8671 101.9/ 1.1000 n.a. n.a. 36.381535 15.515682 7.7353278 2024-Nov-30 06:40 23 09 15.24 -20 11 12.9 240.996079 3.722679 n.a. n.a. 0.986315100121 0.1013403 0.00120929873181 0.0718369 92.1214 /T 87.8084 101.9/ 1.0816 n.a. n.a. 36.775465 16.954377 7.6104764 2024-Nov-30 06:50 23 09 23.19 -20 05 20.7 242.629693 2.063990 n.a. n.a. 0.986315502885 0.1009127 0.00120958327173 0.0708491 92.1827 /T 87.7471 101.9/ 1.0634 n.a. n.a. 37.182721 18.392632 7.4240096 2024-Nov-30 07:00 23 09 31.86 -19 59 27.6 244.234583 0.381019 n.a. n.a. 0.986315903928 0.1004763 0.00120986262042 0.0692577 92.2468 /T 87.6830 101.8/ 1.0454 n.a. n.a. 37.603500 19.827032 7.1770384 >..... 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 ***************************************************************************************************************************************************************************************************************************************************