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 02:43:26 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-4 (spacecraft) (-140485) {source: MMS-4} Center body name: Earth (399) {source: DE441} Center-site name: El Berrueco ******************************************************************************* 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 : 356.4134, 40.8833094, 1.06361 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 356.4134,4829.88693,4153.33056 {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 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2024-Nov-30 17:00 C 23 34 40.74 -15 24 05.6 144.658538 26.273403 n.a. n.a. 0.986335261206 0.0542565 0.00108350179669 -0.8528745 99.2005 /T 80.7372 104.9/ 0.5536 n.a. n.a. 29.304223 4.2851059 -65.77180 2024-Nov-30 17:10 C 23 34 42.03 -15 19 11.3 147.047759 27.408483 n.a. n.a. 0.986335474075 0.0530509 0.00108008610392 -0.8484147 99.2338 /T 80.7041 104.8/ 0.5454 n.a. n.a. 29.695223 3.0879789 -65.44122 2024-Nov-30 17:20 N 23 34 42.92 -15 14 12.6 149.501517 28.479318 n.a. n.a. 0.986335682075 0.0518263 0.00107668888053 -0.8436551 99.2662 /T 80.6719 104.8/ 0.5372 n.a. n.a. 30.108314 1.9955664 -65.08650 2024-Nov-30 17:30 N 23 34 43.45 -15 09 09.5 152.019474 29.482159 n.a. n.a. 0.986335885130 0.0505823 0.00107331128035 -0.8386201 99.2977 /T 80.6406 104.8/ 0.5288 n.a. n.a. 30.540292 1.0085151 -64.71036 2024-Nov-30 17:40 N 23 34 43.64 -15 04 01.9 154.600605 30.413259 n.a. n.a. 0.986336083161 0.0493186 0.00106995435824 -0.8333346 99.3285 /T 80.6100 104.7/ 0.5204 n.a. n.a. 30.988092 0.1266933 -64.31542 2024-Nov-30 17:50 N 23 34 43.52 -14 58 49.8 157.243130 31.268915 n.a. n.a. 0.986336276087 0.0480347 0.00106661906693 -0.8278245 99.3587 /T 80.5800 104.7/ 0.5120 n.a. n.a. 31.448826 359.34932 -63.90422 2024-Nov-30 18:00 A 23 34 43.12 -14 53 33.1 159.944452 32.045527 n.a. n.a. 0.986336463828 0.0467304 0.00106330625427 -0.8221163 99.3885 /T 80.5504 104.7/ 0.5035 n.a. n.a. 31.919802 358.67511 -63.47916 2024-Nov-30 18:10 A 23 34 42.48 -14 48 11.6 162.701121 32.739646 n.a. n.a. 0.986336646300 0.0454052 0.00106001666070 -0.8162370 99.4179 /T 80.5212 104.6/ 0.4950 n.a. n.a. 32.398551 358.10235 -63.04253 2024-Nov-30 18:20 A 23 34 41.62 -14 42 45.5 165.508813 33.348040 n.a. n.a. 0.986336823420 0.0440589 0.00105675091688 -0.8102143 99.4470 /T 80.4923 104.6/ 0.4864 n.a. n.a. 32.882837 357.62904 -62.59652 2024-Nov-30 18:30 23 34 40.58 -14 37 14.6 168.362336 33.867753 n.a. n.a. 0.986336995101 0.0426909 0.00105350954165 -0.8040763 99.4760 /T 80.4635 104.5/ 0.4779 n.a. n.a. 33.370669 357.25293 -62.14314 2024-Nov-30 18:40 23 34 39.39 -14 31 38.9 171.255674 34.296172 n.a. n.a. 0.986337161255 0.0413009 0.00105029294010 -0.7978516 99.5051 /T 80.4346 104.5/ 0.4693 n.a. n.a. 33.860307 356.97164 -61.68433 2024-Nov-30 18:50 23 34 38.09 -14 25 58.3 174.182055 34.631078 n.a. n.a. 0.986337321793 0.0398885 0.00104710140199 -0.7915691 99.5342 /T 80.4056 104.5/ 0.4607 n.a. n.a. 34.350267 356.78267 -61.22186 2024-Nov-30 19:00 23 34 36.72 -14 20 13.0 177.134060 34.870710 n.a. n.a. 0.986337476625 0.0384533 0.00104393510049 -0.7852580 99.5637 /T 80.3764 104.4/ 0.4520 n.a. n.a. 34.839323 356.68346 -60.75742 2024-Nov-30 19:10 t 23 34 35.30 -14 14 22.8 180.103754 35.013799 n.a. n.a. 0.986337625658 0.0369948 0.00104079409108 -0.7789477 99.5935 /T 80.3467 104.4/ 0.4434 n.a. n.a. 35.326503 356.67144 -60.29253 2024-Nov-30 19:20 e 23 34 33.87 -14 08 27.7 183.082855 35.059609 n.a. n.a. 0.986337768798 0.0355126 0.00103767831071 -0.7726679 99.6238 /T 80.3166 104.3/ 0.4349 n.a. n.a. 35.811088 356.74402 -59.82866 2024-Nov-30 19:30 23 34 32.48 -14 02 27.7 186.062910 35.007954 n.a. n.a. 0.986337905948 0.0340062 0.00103458757745 -0.7664483 99.6548 /T 80.2858 104.3/ 0.4263 n.a. n.a. 36.292610 356.89861 -59.36712 2024-Nov-30 19:40 23 34 31.16 -13 56 22.9 189.035484 34.859207 n.a. n.a. 0.986338037010 0.0324751 0.00103152159001 -0.7603185 99.6866 /T 80.2541 104.2/ 0.4178 n.a. n.a. 36.770840 357.13265 -58.90914 2024-Nov-30 19:50 23 34 29.93 -13 50 13.2 191.992350 34.614290 n.a. n.a. 0.986338161885 0.0309189 0.00102847992815 -0.7543083 99.7194 /T 80.2216 104.2/ 0.4093 n.a. n.a. 37.245788 357.44357 -58.45584 2024-Nov-30 20:00 23 34 28.85 -13 43 58.7 194.925667 34.274649 n.a. n.a. 0.986338280470 0.0293370 0.00102546205268 -0.7484472 99.7531 /T 80.1880 104.2/ 0.4008 n.a. n.a. 37.717691 357.82882 -58.00827 2024-Nov-30 20:10 23 34 27.95 -13 37 39.4 197.828138 33.842223 n.a. n.a. 0.986338392661 0.0277290 0.00102246730629 -0.7427646 99.7881 /T 80.1532 104.1/ 0.3924 n.a. n.a. 38.187001 358.28586 -57.56735 2024-Nov-30 20:20 23 34 27.27 -13 31 15.4 200.693140 33.319397 n.a. n.a. 0.986338498353 0.0260943 0.00101949491441 -0.7372895 99.8244 /T 80.1171 104.1/ 0.3841 n.a. n.a. 38.654381 358.81209 -57.13396 2024-Nov-30 20:30 23 34 26.84 -13 24 46.5 203.514826 32.708946 n.a. n.a. 0.986338597437 0.0244324 0.00101654398645 -0.7320508 99.8621 /T 80.0796 104.0/ 0.3758 n.a. n.a. 39.120683 359.40494 -56.70886 2024-Nov-30 20:40 23 34 26.69 -13 18 13.0 206.288193 32.013977 n.a. n.a. 0.986338689803 0.0227426 0.00101361351713 -0.7270767 99.9014 /T 80.0404 104.0/ 0.3677 n.a. n.a. 39.586945 0.0617721 -56.29276 2024-Nov-30 20:50 23 34 26.88 -13 11 34.8 209.009115 31.237866 n.a. n.a. 0.986338775337 0.0210245 0.00101070238839 -0.7223952 99.9424 /T 79.9996 103.9/ 0.3596 n.a. n.a. 40.054368 0.7798837 -55.88630 2024-Nov-30 21:00 23 34 27.42 -13 04 52.0 211.674344 30.384197 n.a. n.a. 0.986338853925 0.0192774 0.00100780937126 -0.7180336 99.9853 /T 79.9569 103.9/ 0.3516 n.a. n.a. 40.524304 1.5565187 -55.49005 2024-Nov-30 21:10 23 34 28.37 -12 58 04.6 214.281492 29.456703 n.a. n.a. 0.986338925449 0.0175007 0.00100493312816 -0.7140187 100.0301 /T 79.9122 103.8/ 0.3437 n.a. n.a. 40.998236 2.3888332 -55.10451 2024-Nov-30 21:20 23 34 29.74 -12 51 12.8 216.828985 28.459209 n.a. n.a. 0.986338989789 0.0156938 0.00100207221546 -0.7103767 100.0771 /T 79.8655 103.8/ 0.3359 n.a. n.a. 41.477763 3.2738899 -54.73016 2024-Nov-30 21:30 23 34 31.59 -12 44 16.5 219.316003 27.395585 n.a. n.a. 0.986339046823 0.0138560 0.00099922508610 -0.7071329 100.1262 /T 79.8165 103.8/ 0.3283 n.a. n.a. 41.964576 4.2086484 -54.36741 2024-Nov-30 21:40 23 34 33.93 -12 37 15.8 221.742410 26.269699 n.a. n.a. 0.986339096425 0.0119867 0.00099639009269 -0.7043120 100.1777 /T 79.7652 103.7/ 0.3208 n.a. n.a. 42.460439 5.1899594 -54.01662 2024-Nov-30 21:50 23 34 36.82 -12 30 10.7 224.108674 25.085379 n.a. n.a. 0.986339138467 0.0100851 0.00099356549062 -0.7019378 100.2316 /T 79.7115 103.7/ 0.3134 n.a. n.a. 42.967169 6.2145619 -53.67815 2024-Nov-30 22:00 23 34 40.27 -12 23 01.5 226.415796 23.846388 n.a. n.a. 0.986339172818 0.0081505 0.00099074944152 -0.7000332 100.2881 /T 79.6551 103.7/ 0.3062 n.a. n.a. 43.486611 7.2790835 -53.35230 2024-Nov-30 22:10 23 34 44.32 -12 15 48.1 228.665225 22.556380 n.a. n.a. 0.986339199021 0.0060237 0.00098793920011 -0.6990204 100.3472 /T 79.5962 103.6/ 0.2991 n.a. n.a. 44.012741 8.3753780 -53.06008 2024-Nov-30 22:20 23 34 49.00 -12 08 30.6 230.858789 21.218902 n.a. n.a. 0.986339216667 0.0038844 0.00098513207263 -0.6984606 100.4092 /T 79.5344 103.6/ 0.2922 n.a. n.a. 44.556280 9.5055850 -52.77814 2024-Nov-30 22:30 23 34 54.34 -12 01 09.2 232.998628 19.837388 n.a. n.a. 0.986339225724 0.0017408 0.00098232624953 -0.6983519 100.4740 /T 79.4698 103.6/ 0.2854 n.a. n.a. 45.119487 10.666202 -52.50552 2024-Nov-30 22:40 23 35 00.37 -11 53 43.9 235.087133 18.415141 n.a. n.a. 0.986339226184 -0.0004021 0.00097951991294 -0.6986994 100.5418 /T 79.4021 103.5/ 0.2788 n.a. n.a. 45.704422 11.853527 -52.24170 2024-Nov-30 22:50 23 35 07.11 -11 46 14.6 237.126896 16.955326 n.a. n.a. 0.986339218057 -0.0025420 0.00097671121189 -0.6995146 100.6127 /T 79.3314 103.5/ 0.2724 n.a. n.a. 46.312934 13.063697 -51.98652 2024-Nov-30 23:00 23 35 14.60 -11 38 41.6 239.120659 15.460965 n.a. n.a. 0.986339201353 -0.0046797 0.00097389823596 -0.7008156 100.6867 /T 79.2575 103.5/ 0.2662 n.a. n.a. 46.946624 14.292734 -51.74028 2024-Nov-30 23:10 23 35 22.87 -11 31 04.8 241.071279 13.934943 n.a. n.a. 0.986339176075 -0.0068188 0.00097107898974 -0.7026264 100.7641 /T 79.1803 103.5/ 0.2602 n.a. n.a. 47.606834 15.536597 -51.50364 2024-Nov-30 23:20 23 35 31.94 -11 23 24.3 242.981694 12.380007 n.a. n.a. 0.986339142206 -0.0089655 0.00096825137035 -0.7049765 100.8448 /T 79.0998 103.5/ 0.2543 n.a. n.a. 48.294645 16.791230 -51.27763 2024-Nov-30 23:30 23 35 41.83 -11 15 40.1 244.854899 10.798773 n.a. n.a. 0.986339099698 -0.0111281 0.00096541314959 -0.7078986 100.9291 /T 79.0157 103.5/ 0.2487 n.a. n.a. 49.010885 18.052627 -51.06352 2024-Nov-30 23:40 23 35 52.57 -11 07 52.3 246.693924 9.193730 n.a. n.a. 0.986339048469 -0.0133163 0.00096256196262 -0.7114276 101.0168 /T 78.9281 103.4/ 0.2433 n.a. n.a. 49.756150 19.316880 -50.86279 2024-Nov-30 23:50 23 36 04.18 -11 00 01.0 248.501821 7.567250 n.a. n.a. 0.986338988396 -0.0155404 0.00095969530371 -0.7155986 101.1082 /T 78.8369 103.4/ 0.2380 n.a. n.a. 50.530830 20.580229 -50.67692 2024-Dec-01 00:00 23 36 16.68 -10 52 06.2 250.281651 5.921593 n.a. n.a. 0.986338919314 -0.0178109 0.00095681052953 -0.7204449 101.2034 /T 78.7420 103.4/ 0.2330 n.a. n.a. 51.335144 21.839097 -50.50738 $$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 ***************************************************************************************************************************************************************************************************************************************************