API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Aug 26, 2026 Spektr-R Telescope (Spacecraft) -557 (Earth orbiting) http://www.spaceflightnow.com/news/n1107/18spektr/ BACKGROUND: Russian Earth-orbiting radio telescope funded by Russian Astro Space Center. It was launched from the Baikonur Cosmodrome on July 18, 2011 at 02:31 UTC by a Zenit-3M launcher with Fregat-SB upper stage. MISSION OBJECTIVES: The primary scientific goal of Spektr-R over the planned 5-year mission is the study of astronomical objects at an angular resolution of a few millionths of an arcsecond. This is accomplished by using the satellite interferometrically in conjunction with ground-based observatories, including Arecibo and Greenbank. The primary targets are extragalactic. Characteristics of near-Earth and interplanetary plasma will also be studied. Wavelengths used are 1.35-6.0, 18.0 and 92.0 cm. PHYSICAL DATA: Mass : 3295 kg Diameter: 10 m SPACECRAFT TRAJECTORY: Perigee: ~ 10,000 km Apogee : ~390,000 km TRAJECTORY: The IKI (Russian Space Research Institute) provided an official trajectory for Nov 1-16 (2011). TLEs are used for other times, and are low-precision, especially during the following intervals which are extrapolations over data gaps: 2011: 2012: 2013: Jul 22 - Aug 04 Feb 26 - Apr 24 Jan 16 - Jun 02 Aug 12 - Oct 04 May 11 - May 29 Jul 04 - Jul 14 Dec 09 - Feb 17 (2012) Jun 12 - Aug 30 Oct 16 - Nov 02 Sep 08 - Jan 08 (2013) Dec 24 - Jan 10 Jan 19 - Feb 22 May 09 - May 27 Trajectory name Start Stop ------------------------------ ----------------- ----------------- TLEs 2011-Jun-18 06:09 2011-Nov-01 11:01 spectr_111101_111116_111102 2011-Nov-01 11:01 2011-Nov-16 01:07 TLEs 2011-Nov-16 01:07 Current ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Wed Sep 16 12:01:00 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Spektr-R Observatory (spacecraft) (-557) {source: spektr-r_MERGED} Center body name: Earth (399) {source: DE441} Center-site name: El Berrueco ******************************************************************************* Start time : A.D. 2026-Sep-02 00:00:00.0000 UT Stop time : A.D. 2026-Sep-05 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.260915.p261212 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-15. PREDICTS-> 2026-DEC-11 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 .....< 2026-Sep-02 02:40 m 06 16 32.39 -15 28 37.2 110.266818 -0.443377 n.a. n.a. 1.008894621847 -2.4004195 0.00049260312596 2.3447980 70.1669 /L 109.8072 66.5/ 74.1394 n.a. n.a. 180.37664 71.355364 65.389259 2026-Sep-02 02:50 m 06 18 27.41 -15 19 04.4 111.481156 1.096032 n.a. n.a. 1.008885013305 -2.3871904 0.00050197458194 2.3146891 69.6846 /L 110.2890 66.8/ 74.0914 n.a. n.a. 171.74040 71.090421 65.762292 2026-Sep-02 03:00 m 06 20 16.71 -15 09 51.3 112.731965 2.637518 n.a. n.a. 1.008875457651 -2.3740962 0.00051122813814 2.2861349 69.2256 /L 110.7476 67.0/ 74.0438 n.a. n.a. 163.65907 70.811401 66.135860 2026-Sep-02 03:10 m 06 22 00.64 -15 00 56.5 114.020015 4.178916 n.a. n.a. 1.008865954319 -2.3611476 0.00052036992304 2.2590768 68.7883 /L 111.1845 67.3/ 73.9966 n.a. n.a. 156.08582 70.517784 66.509866 2026-Sep-02 03:20 m 06 23 39.53 -14 52 18.7 115.346281 5.718057 n.a. n.a. 1.008856502701 -2.3483525 0.00052940583844 2.2334607 68.3716 /L 111.6008 67.5/ 73.9496 n.a. n.a. 148.97942 70.209128 66.884115 2026-Sep-02 03:30 m 06 25 13.70 -14 43 56.6 116.711921 7.252756 n.a. n.a. 1.008847102166 -2.3357169 0.00053834157438 2.2092354 67.9740 /L 111.9980 67.8/ 73.9029 n.a. n.a. 142.30347 69.885073 67.258318 2026-Sep-02 03:40 m 06 26 43.43 -14 35 49.3 118.118267 8.780799 n.a. n.a. 1.008837752061 -2.3232450 0.00054718262201 2.1863530 67.5946 /L 112.3770 68.0/ 73.8564 n.a. n.a. 136.02569 69.545353 67.632103 2026-Sep-02 03:50 m 06 28 08.97 -14 27 55.8 119.566805 10.299926 n.a. n.a. 1.008828451718 -2.3109394 0.00055593428445 2.1647681 67.2321 /L 112.7391 68.2/ 73.8100 n.a. n.a. 130.11740 69.189796 68.005019 2026-Sep-02 04:00 m 06 29 30.57 -14 20 15.1 121.059166 11.807825 n.a. n.a. 1.008819200464 -2.2988017 0.00056460168619 2.1444372 66.8857 /L 113.0851 68.4/ 73.7639 n.a. n.a. 124.55299 68.818345 68.376541 2026-Sep-02 04:10 Am 06 30 48.46 -14 12 46.5 122.597109 13.302114 n.a. n.a. 1.008809997619 -2.2868325 0.00057318978104 2.1253188 66.5545 /L 113.4160 68.5/ 73.7178 n.a. n.a. 119.30957 68.431059 68.746082 2026-Sep-02 04:20 Am 06 32 02.84 -14 05 29.0 124.182501 14.780334 n.a. n.a. 1.008800842504 -2.2750317 0.00058170335872 2.1073728 66.2375 /L 113.7326 68.7/ 73.6717 n.a. n.a. 114.36657 68.028131 69.113000 2026-Sep-02 04:30 Am 06 33 13.91 -13 58 22.1 125.817307 16.239938 n.a. n.a. 1.008791734442 -2.2633985 0.00059014705050 2.0905604 65.9340 /L 114.0357 68.9/ 73.6257 n.a. n.a. 109.70546 67.609898 69.476602 2026-Sep-02 04:40 Am 06 34 21.86 -13 51 25.1 127.503562 17.678280 n.a. n.a. 1.008782672758 -2.2519316 0.00059852533395 2.0748440 65.6432 /L 114.3261 69.0/ 73.5797 n.a. n.a. 105.30950 67.176852 69.836160 2026-Sep-02 04:50 Nm 06 35 26.86 -13 44 37.3 129.243351 19.092609 n.a. n.a. 1.008773656787 -2.2406292 0.00060684253665 2.0601866 65.3645 /L 114.6045 69.2/ 73.5335 n.a. n.a. 101.16347 66.729655 70.190913 2026-Sep-02 05:00 Nm 06 36 29.07 -13 37 58.2 131.038778 20.480059 n.a. n.a. 1.008764685869 -2.2294895 0.00061510283943 2.0465521 65.0971 /L 114.8715 69.3/ 73.4873 n.a. n.a. 97.253535 66.269149 70.540080 2026-Sep-02 05:10 Nm 06 37 28.65 -13 31 27.2 132.891936 21.837647 n.a. n.a. 1.008755759352 -2.2185100 0.00062331027877 2.0339048 64.8405 /L 115.1278 69.4/ 73.4409 n.a. n.a. 93.567031 65.796365 70.882871 2026-Sep-02 05:20 Cm 06 38 25.75 -13 25 03.9 134.804868 23.162264 n.a. n.a. 1.008746876597 -2.2076884 0.00063146874884 2.0222096 64.5939 /L 115.3740 69.5/ 73.3943 n.a. n.a. 90.092330 65.312537 71.218490 2026-Sep-02 05:30 Cm 06 39 20.51 -13 18 47.9 136.779519 24.450676 n.a. n.a. 1.008738036973 -2.1970219 0.00063958200297 2.0114314 64.3570 /L 115.6105 69.6/ 73.3475 n.a. n.a. 86.818707 64.819105 71.546151 >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2026-Sep-03 03:40 r 07 49 02.82 -06 51 38.1 99.234884 0.066878 n.a. n.a. 1.007805192909 -1.4393199 0.00147222668477 0.7525019 46.7611 /L 133.1779 71.1/ 63.2464 n.a. n.a. 20.898387 74.733000 63.699449 2026-Sep-03 03:50 m 07 49 16.00 -06 50 42.2 100.833839 1.902383 n.a. n.a. 1.007799419000 -1.4359281 0.00147525352359 0.7498941 46.7097 /L 133.2293 71.1/ 63.1938 n.a. n.a. 19.996285 74.061679 64.567612 2026-Sep-03 04:00 m 07 49 28.55 -06 49 46.5 102.447430 3.730092 n.a. n.a. 1.007793658652 -1.4325526 0.00147827114282 0.7479328 46.6608 /L 133.2781 71.1/ 63.1417 n.a. n.a. 19.109331 73.324477 65.460537 2026-Sep-03 04:10 Am 07 49 40.50 -06 48 50.8 104.078924 5.548427 n.a. n.a. 1.007787911798 -1.4291934 0.00148128213079 0.7466155 46.6143 /L 133.3246 71.1/ 63.0899 n.a. n.a. 18.239279 72.515076 66.374058 2026-Sep-03 04:20 Am 07 49 51.83 -06 47 55.1 105.731628 7.355741 n.a. n.a. 1.007782178375 -1.4258501 0.00148428906282 0.7459383 46.5701 /L 133.3686 71.1/ 63.0384 n.a. n.a. 17.387924 71.626569 67.303562 2026-Sep-03 04:30 Am 07 50 02.58 -06 46 59.5 107.408908 9.150304 n.a. n.a. 1.007776458318 -1.4225227 0.00148729449625 0.7458960 46.5284 /L 133.4103 71.1/ 62.9872 n.a. n.a. 16.557097 70.651459 68.244028 2026-Sep-03 04:40 Am 07 50 12.73 -06 46 03.8 109.114193 10.930297 n.a. n.a. 1.007770751565 -1.4192109 0.00149030096562 0.7464825 46.4889 /L 133.4497 71.0/ 62.9362 n.a. n.a. 15.748668 69.581666 69.190077 2026-Sep-03 04:50 Nm 07 50 22.32 -06 45 08.0 110.850987 12.693798 n.a. n.a. 1.007765058054 -1.4159147 0.00149331097776 0.7476901 46.4517 /L 133.4869 71.0/ 62.8855 n.a. n.a. 14.964545 68.408584 70.136035 2026-Sep-03 05:00 Nm 07 50 31.34 -06 44 12.1 112.622877 14.438767 n.a. n.a. 1.007759377723 -1.4126337 0.00149632700695 0.7495101 46.4166 /L 133.5218 71.0/ 62.8348 n.a. n.a. 14.206673 67.123169 71.076008 2026-Sep-03 05:10 Nm 07 50 39.82 -06 43 16.0 114.433528 16.163037 n.a. n.a. 1.007753710510 -1.4093680 0.00149935149003 0.7519327 46.3837 /L 133.5546 71.0/ 62.7842 n.a. n.a. 13.477030 65.716112 72.003965 2026-Sep-03 05:20 Cm 07 50 47.76 -06 42 19.7 116.286692 17.864301 n.a. n.a. 1.007748056357 -1.4061172 0.00150238682165 0.7549467 46.3529 /L 133.5853 70.9/ 62.7337 n.a. n.a. 12.777616 64.178089 72.913832 2026-Sep-03 05:30 Cm 07 50 55.19 -06 41 23.2 118.186194 19.540099 n.a. n.a. 1.007742415203 -1.4028812 0.00150543534940 0.7585398 46.3242 /L 133.6140 70.9/ 62.6832 n.a. n.a. 12.110445 62.500129 73.799591 >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2026-Sep-04 04:00 m 08 15 48.80 -04 32 03.3 97.038649 1.067096 n.a. n.a. 1.007081852971 -1.0577352 0.00196061023419 0.2688529 40.4797 /L 139.4479 63.3/ 51.7037 n.a. n.a. 11.854190 74.747452 43.738880 2026-Sep-04 04:10 Am 08 15 56.24 -04 31 31.1 98.661523 2.927181 n.a. n.a. 1.007077607478 -1.0556372 0.00196169293242 0.2680098 40.4529 /L 139.4747 63.2/ 51.6475 n.a. n.a. 11.222852 73.857026 45.200673 2026-Sep-04 04:20 Am 08 16 03.24 -04 30 58.9 100.297469 4.780645 n.a. n.a. 1.007073370406 -1.0535438 0.00196277350131 0.2678152 40.4278 /L 139.4998 63.2/ 51.5918 n.a. n.a. 10.599919 72.857421 46.798982 2026-Sep-04 04:30 Am 08 16 09.81 -04 30 26.7 101.949941 6.625887 n.a. n.a. 1.007069141738 -1.0514548 0.00196385453599 0.2682660 40.4044 /L 139.5232 63.1/ 51.5367 n.a. n.a. 9.9870858 71.732743 48.529814 2026-Sep-04 04:40 Am 08 16 15.94 -04 29 54.4 103.622446 8.461243 n.a. n.a. 1.007064921455 -1.0493704 0.00196493861698 0.2693580 40.3827 /L 139.5449 63.1/ 51.4821 n.a. n.a. 9.3861512 70.464337 50.385289 2026-Sep-04 04:50 Nm 08 16 21.66 -04 29 22.1 105.318556 10.284969 n.a. n.a. 1.007060709540 -1.0472903 0.00196602830530 0.2710857 40.3627 /L 139.5649 63.1/ 51.4279 n.a. n.a. 8.7990358 69.030316 52.353063 2026-Sep-04 05:00 Nm 08 16 26.96 -04 28 49.6 107.041926 12.095238 n.a. n.a. 1.007056505976 -1.0452147 0.00196712613744 0.2734424 40.3444 /L 139.5832 63.0/ 51.3741 n.a. n.a. 8.2278094 67.405053 54.415916 2026-Sep-04 05:10 Nm 08 16 31.84 -04 28 17.0 108.796304 13.890116 n.a. n.a. 1.007052310744 -1.0431435 0.00196823462050 0.2764202 40.3276 /L 139.5999 63.0/ 51.3206 n.a. n.a. 7.6747216 65.558689 56.551594 2026-Sep-04 05:20 Cm 08 16 36.32 -04 27 44.3 110.585536 15.667557 n.a. n.a. 1.007048123827 -1.0410766 0.00196935622711 0.2800097 40.3125 /L 139.6150 62.9/ 51.2675 n.a. n.a. 7.1422383 63.456726 58.732995 2026-Sep-04 05:30 Cm 08 16 40.41 -04 27 11.4 112.413578 17.425386 n.a. n.a. 1.007043945208 -1.0390140 0.00197049339067 0.2842007 40.2989 /L 139.6286 62.9/ 51.2146 n.a. n.a. 6.6330827 61.059891 60.928740 >..... Daylight Cut-off Requested .....< >..... Elevation 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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Inquiries : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************