API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Dec 10, 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 03:10:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: MMS-3 (spacecraft) (-140484) {source: MMS-3} Center body name: Earth (399) {source: DE441} Center-site name: VdS Remote Observatory, Hakos ******************************************************************************* 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 : 16.3613, -23.2365766, 1.8515 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 16.3613,5865.52307,-2501.54567 {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 17:40 C 23 36 28.97 -11 23 07.1 13.909453 77.675697 n.a. n.a. 0.986355570444 0.0274069 0.00100861521331 -0.8220690 101.2971 /T 78.6453 107.5/ 0.4853 n.a. n.a. 40.015829 348.72498 -59.31233 2024-Nov-30 17:50 Ce 23 36 23.60 -11 16 31.7 2.197051 77.893387 n.a. n.a. 0.986355675018 0.0257878 0.00100533289779 -0.8124780 101.3170 /T 78.6256 107.4/ 0.4752 n.a. n.a. 40.586743 348.75098 -58.73989 2024-Nov-30 18:00 Nt 23 36 18.20 -11 09 50.8 350.518273 77.633381 n.a. n.a. 0.986355773049 0.0241420 0.00100208898608 -0.8029109 101.3373 /T 78.6055 107.4/ 0.4650 n.a. n.a. 41.144499 348.86729 -58.17121 2024-Nov-30 18:10 N 23 36 12.80 -11 03 04.2 339.681270 76.923409 n.a. n.a. 0.986355864428 0.0224689 0.00099888330723 -0.7934050 101.3582 /T 78.5847 107.3/ 0.4548 n.a. n.a. 41.688638 349.07124 -57.60771 2024-Nov-30 18:20 N 23 36 07.45 -10 56 12.0 330.181046 75.830457 n.a. n.a. 0.986355949045 0.0207679 0.00099571554028 -0.7839978 101.3800 /T 78.5631 107.2/ 0.4446 n.a. n.a. 42.219046 349.36030 -57.05072 2024-Nov-30 18:30 A 23 36 02.20 -10 49 14.2 322.143182 74.434712 n.a. n.a. 0.986356026786 0.0190385 0.00099258521424 -0.7747266 101.4027 /T 78.5406 107.2/ 0.4344 n.a. n.a. 42.735948 349.73206 -56.50144 2024-Nov-30 18:40 A 23 35 57.10 -10 42 10.8 315.452195 72.809669 n.a. n.a. 0.986356097536 0.0172800 0.00098949170850 -0.7656286 101.4265 /T 78.5170 107.1/ 0.4242 n.a. n.a. 43.239896 350.18415 -55.96098 2024-Nov-30 18:50 A 23 35 52.19 -10 35 01.9 309.897275 71.014157 n.a. n.a. 0.986356161177 0.0154919 0.00098643425368 -0.7567408 101.4517 /T 78.4920 107.1/ 0.4141 n.a. n.a. 43.731763 350.71430 -55.43036 2024-Nov-30 19:00 23 35 47.51 -10 27 47.5 305.260297 69.092212 n.a. n.a. 0.986356217589 0.0136735 0.00098341193267 -0.7480999 101.4782 /T 78.4656 107.0/ 0.4040 n.a. n.a. 44.212725 351.32025 -54.91049 2024-Nov-30 19:10 23 35 43.13 -10 20 27.6 301.351805 67.075876 n.a. n.a. 0.986356266649 0.0118241 0.00098042368223 -0.7397420 101.5065 /T 78.4376 106.9/ 0.3940 n.a. n.a. 44.684255 351.99974 -54.40221 2024-Nov-30 19:20 23 35 39.08 -10 13 02.3 298.019012 64.988308 n.a. n.a. 0.986356308232 0.0099432 0.00097746829495 -0.7317029 101.5365 /T 78.4077 106.9/ 0.3840 n.a. n.a. 45.148102 352.75047 -53.90626 2024-Nov-30 19:30 23 35 35.40 -10 05 31.7 295.142593 62.846344 n.a. n.a. 0.986356342208 0.0080298 0.00097454442142 -0.7240175 101.5685 /T 78.3759 106.8/ 0.3741 n.a. n.a. 45.606273 353.57010 -53.42330 2024-Nov-30 19:40 23 35 32.15 -09 57 55.8 292.630428 60.662364 n.a. n.a. 0.986356368447 0.0060835 0.00097165057298 -0.7167204 101.6026 /T 78.3420 106.8/ 0.3643 n.a. n.a. 46.061017 354.45618 -52.95390 2024-Nov-30 19:50 23 35 29.37 -09 50 14.6 290.411468 58.445605 n.a. n.a. 0.986356386816 0.0041034 0.00096878512468 -0.7098449 101.6390 /T 78.3058 106.7/ 0.3546 n.a. n.a. 46.514801 355.40614 -52.49859 2024-Nov-30 20:00 23 35 27.10 -09 42 28.3 288.430646 56.203072 n.a. n.a. 0.986356397175 0.0020888 0.00096594631857 -0.7034239 101.6778 /T 78.2671 106.7/ 0.3450 n.a. n.a. 46.970281 356.41725 -52.05779 2024-Nov-30 20:10 23 35 25.39 -09 34 36.9 286.644956 53.940162 n.a. n.a. 0.986356399387 0.0000388 0.00096313226739 -0.6974892 101.7193 /T 78.2258 106.6/ 0.3355 n.a. n.a. 47.430279 357.48661 -51.63190 2024-Nov-30 20:20 23 35 24.28 -09 26 40.5 285.020498 51.661101 n.a. n.a. 0.986356393306 -0.0020472 0.00096034095847 -0.6920714 101.7635 /T 78.1818 106.6/ 0.3261 n.a. n.a. 47.897751 358.61113 -51.22122 2024-Nov-30 20:30 23 35 23.81 -09 18 39.1 283.530285 49.369252 n.a. n.a. 0.986356378787 -0.0041703 0.00095757025805 -0.6872001 101.8106 /T 78.1348 106.5/ 0.3169 n.a. n.a. 48.375755 359.78749 -50.82605 2024-Nov-30 20:40 23 35 24.03 -09 10 32.8 282.152616 47.067325 n.a. n.a. 0.986356355679 -0.0063312 0.00095481791572 -0.6829040 101.8608 /T 78.0848 106.5/ 0.3078 n.a. n.a. 48.867416 1.0121498 -50.44661 2024-Nov-30 20:50 23 35 24.97 -09 02 21.7 280.869866 44.757544 n.a. n.a. 0.986356323828 -0.0085308 0.00095208156932 -0.6792101 101.9142 /T 78.0316 106.4/ 0.2989 n.a. n.a. 49.375889 2.2813408 -50.08312 2024-Nov-30 21:00 23 35 26.67 -08 54 05.9 279.667581 42.441752 n.a. n.a. 0.986356283078 -0.0107701 0.00094935874978 -0.6761447 101.9709 /T 77.9750 106.4/ 0.2901 n.a. n.a. 49.904326 3.5910667 -49.73575 2024-Nov-30 21:10 23 35 29.18 -08 45 45.4 278.533788 40.121500 n.a. n.a. 0.986356233267 -0.0130499 0.00094664688642 -0.6737321 102.0311 /T 77.9149 106.3/ 0.2815 n.a. n.a. 50.455833 4.9371158 -49.40468 2024-Nov-30 21:20 23 35 32.52 -08 37 20.3 277.458480 37.798109 n.a. n.a. 0.986356174230 -0.0153714 0.00094394331242 -0.6719959 102.0950 /T 77.8513 106.3/ 0.2731 n.a. n.a. 51.033437 6.3150790 -49.09008 2024-Nov-30 21:30 23 35 36.74 -08 28 50.7 276.433215 35.472717 n.a. n.a. 0.986356105798 -0.0177355 0.00094124527034 -0.6709578 102.1626 /T 77.7839 106.3/ 0.2649 n.a. n.a. 51.640049 7.7203757 -48.79209 2024-Nov-30 21:40 23 35 41.86 -08 20 16.7 275.450803 33.146317 n.a. n.a. 0.986356027798 -0.0201432 0.00093854991788 -0.6706383 102.2340 /T 77.7126 106.2/ 0.2568 n.a. n.a. 52.278426 9.1482873 -48.51091 2024-Nov-30 21:50 23 35 47.93 -08 11 38.3 274.505069 30.819782 n.a. n.a. 0.986355940053 -0.0225957 0.00093585433380 -0.6710563 102.3094 /T 77.6373 106.2/ 0.2490 n.a. n.a. 52.951144 10.593997 -48.24669 2024-Nov-30 22:00 23 35 54.97 -08 02 55.6 273.590657 28.493893 n.a. n.a. 0.986355842381 -0.0250941 0.00093315552377 -0.6722293 102.3890 /T 77.5579 106.2/ 0.2414 n.a. n.a. 53.660567 12.052632 -47.99965 2024-Nov-30 22:10 23 36 03.01 -07 54 08.6 272.702862 26.169349 n.a. n.a. 0.986355734312 -0.0277779 0.00093045012597 -0.6743192 102.4727 /T 77.4744 106.2/ 0.2340 n.a. n.a. 54.397764 13.515426 -47.78195 2024-Nov-30 22:20 23 36 12.07 -07 45 17.5 271.837529 23.846782 n.a. n.a. 0.986355615421 -0.0304891 0.00092773478847 -0.6771652 102.5608 /T 77.3865 106.1/ 0.2268 n.a. n.a. 55.176963 14.982602 -47.57975 2024-Nov-30 22:30 23 36 22.19 -07 36 22.4 270.990972 21.526781 n.a. n.a. 0.986355485613 -0.0332213 0.00092500646800 -0.6807729 102.6532 /T 77.2942 106.1/ 0.2198 n.a. n.a. 56.000450 16.449457 -47.39264 2024-Nov-30 22:40 23 36 33.39 -07 27 23.2 270.159871 19.209888 n.a. n.a. 0.986355344811 -0.0359712 0.00092226209310 -0.6851504 102.7501 /T 77.1975 106.1/ 0.2131 n.a. n.a. 56.870038 17.911298 -47.22048 2024-Nov-30 22:50 23 36 45.70 -07 18 19.9 269.341206 16.896613 n.a. n.a. 0.986355192945 -0.0387380 0.00091949855718 -0.6903072 102.8517 /T 77.0961 106.1/ 0.2066 n.a. n.a. 57.787059 19.363527 -47.06343 2024-Nov-30 23:00 23 36 59.14 -07 09 12.6 268.532196 14.587434 n.a. n.a. 0.986355029945 -0.0415236 0.00091671271170 -0.6962546 102.9579 /T 76.9900 106.1/ 0.2003 n.a. n.a. 58.752348 20.801711 -46.92185 2024-Nov-30 23:10 23 37 13.73 -07 00 01.3 267.730257 12.282811 n.a. n.a. 0.986354855728 -0.0443326 0.00091390136058 -0.7030048 103.0689 /T 76.8792 106.1/ 0.1943 n.a. n.a. 59.766247 22.221653 -46.79632 2024-Nov-30 23:20 23 37 29.49 -06 50 45.9 266.932954 9.983183 n.a. n.a. 0.986354670185 -0.0471716 0.00091106125673 -0.7105710 103.1848 /T 76.7635 106.1/ 0.1885 n.a. n.a. 60.828636 23.619459 -46.68758 2024-Nov-30 23:30 23 37 46.44 -06 41 26.4 266.137969 7.688977 n.a. n.a. 0.986354473181 -0.0500491 0.00090818910098 -0.7189659 103.3056 /T 76.6429 106.2/ 0.1830 n.a. n.a. 61.938978 24.991581 -46.59643 2024-Nov-30 23:40 23 38 04.61 -06 32 02.9 265.343069 5.400613 n.a. n.a. 0.986354264542 -0.0529746 0.00090528154458 -0.7282013 103.4314 /T 76.5173 106.2/ 0.1777 n.a. n.a. 63.096382 26.334854 -46.52365 2024-Nov-30 23:50 23 38 24.00 -06 22 35.2 264.546073 3.118502 n.a. n.a. 0.986354044055 -0.0559581 0.00090233519462 -0.7382872 103.5623 /T 76.3865 106.2/ 0.1726 n.a. n.a. 64.299675 27.646517 -46.46996 2024-Dec-01 00:00 23 38 44.62 -06 13 03.5 263.744831 0.843057 n.a. n.a. 0.986353811468 -0.0590095 0.00089934662274 -0.7492311 103.6984 /T 76.2507 106.2/ 0.1679 n.a. n.a. 65.547481 28.924210 -46.43595 $$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 ***************************************************************************************************************************************************************************************************************************************************