API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Jul 08, 2025 Hubble Space Telescope -48 http://hubblesite.org BACKGROUND: Launched: April 24, 1990 [from space shuttle Discovery (STS-31)] Deployed: April 25, 1990 NOTE: HST ephemeris data can be unreliable during times of the following space shuttle servicing missions Servicing Mission 1 : 1993 (December 02-14) Servicing Mission 2 : 1997 (February 11-21) Servicing Mission 3A: 1999 (December 19-28) Servicing Mission 3B: 2002 (March 01-12) Servicing Mission 4 : 2009 (May 11-25) HUBBLE SPACE TELESCOPE: Length : 43.5 ft (13.2 m) Weight : 24,500 lb (11,110 kg) Maximum Diameter: 14 ft (4.2 m) Data return : ~120 Gigabytes (GB)/week Generic orbit facts: Altitude : 569 km, or 353 miles Inclination : 28.5 deg. to equator Orbit period : 97 minutes Orbital speed: 28,000 kph (17500 mph) SPACECRAFT TRAJECTORY: The trajectory here is a concatenation of publicly released JSpOC two-line elements. These can usually only be propagated reliably "days" into the future, and are updated frequently to maintain accuracy. ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Tue Jul 8 20:18:46 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: Hubble Space Telescope (spacecraft) (-48) {source: hst} Center body name: Earth (399) {source: DE441} Center-site name: Swan Reach Imaging, Glenalta ******************************************************************************* Start time : A.D. 2025-Jul-06 00:00:00.0000 UT Stop time : A.D. 2025-Jul-20 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 139.5701, -34.5440227, .056888 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 139.5701,5259.32258,-3596.34777 {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.250708.p251004 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-JUL-08. PREDICTS-> 2025-OCT-03 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 .....< >..... Solar Elongation Cut-off Requested .....< 2025-Jul-06 08:00 Ct 17 40 49.53 +11 55 11.1 75.338619 0.218218 n.a. n.a. 1.016645896988 6.3849478 0.00001693367195 6.4166554 140.1527 /T 39.8473 49.0/ 81.3910 n.a. n.a. 16622.102 91.346871 62.066569 >..... Elevation Cut-off Requested .....< 2025-Jul-06 09:30 r 08 47 31.04 +10 06 06.4 287.142700 6.812639 n.a. n.a. 1.016633618444 6.8490254 0.00001278355201 -5.8076778 28.2321 /T 151.7675 101.4/ 81.7060 n.a. n.a. 28157.143 72.873682 -53.16172 >..... Elevation Cut-off Requested .....< 2025-Jul-06 11:10 r 10 36 56.88 +17 51 42.1 294.650242 3.863771 n.a. n.a. 1.016647791059 6.0997104 0.00001444936513 -4.4351396 50.3646 /T 129.6346 80.8/ 82.0138 n.a. n.a. 33056.122 57.556529 -37.53138 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-07 09:10 At 16 36 44.12 +29 53 55.5 40.243246 11.949068 n.a. n.a. 1.016634038265 6.0260660 0.00001039003458 5.1415034 116.4673 /T 63.5328 56.0/ 88.4994 n.a. n.a. 40690.017 99.362190 45.175991 >..... Elevation Cut-off Requested .....< 2025-Jul-07 10:50 t 17 00 04.61 +48 07 28.5 17.987443 3.795998 n.a. n.a. 1.016645176410 4.5386794 0.00001441655498 4.2959351 103.8743 /T 76.1255 74.8/ 88.7718 n.a. n.a. 33646.174 94.575805 36.232380 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-08 08:40 Nr 11 21 23.38 +27 46 01.5 335.512369 23.329343 n.a. n.a. 1.016604994682 6.3806172 0.00000714267412 -1.2868000 56.5863 /T 123.4139 99.1/ 93.8900 n.a. n.a. 82579.516 73.850599 -10.23190 >..... Elevation Cut-off Requested .....< 2025-Jul-08 10:20 r 12 41 09.16 +41 01 40.9 337.035506 9.482384 n.a. n.a. 1.016617598373 5.6528221 0.00001141086260 0.0589694 70.2058 /T 109.7940 92.3/ 94.1200 n.a. n.a. 52690.106 64.859618 0.4662851 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-09 08:10 Cr 07 43 00.86 +10 42 10.2 288.236410 7.196663 n.a. n.a. 1.016572736111 6.0061778 0.00001258841798 -5.6584899 13.5765 /T 166.4232 150.3/ 97.6683 n.a. n.a. 29863.422 70.638243 -51.23463 >..... Elevation Cut-off Requested .....< 2025-Jul-09 09:50 r 09 33 27.05 +19 44 59.3 296.876813 3.594730 n.a. n.a. 1.016585180723 6.0725395 0.00001461601397 -4.1340558 32.5379 /T 147.4620 131.7/ 97.8299 n.a. n.a. 33934.254 56.063883 -34.58964 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-10 07:50 Ct 15 28 15.01 +31 46 50.8 39.079414 10.498000 n.a. n.a. 1.016561396026 5.8671237 0.00001098620643 5.1748252 102.9831 /T 77.0171 76.9/ 99.6360 n.a. n.a. 38249.821 99.587258 45.533605 >..... Elevation Cut-off Requested .....< 2025-Jul-10 09:30 t 15 49 11.12 +49 46 59.4 17.001861 2.447384 n.a. n.a. 1.016572429043 5.2222762 0.00001527576880 4.2952092 94.4293 /T 85.5706 87.8/ 99.6887 n.a. n.a. 31773.740 94.231479 36.209654 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Solar Elongation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-11 09:00 Ar 11 39 58.98 +43 13 43.4 339.212245 8.042783 n.a. n.a. 1.016533770807 5.5738233 0.00001209070008 0.4266043 56.7210 /T 123.2792 130.8/ 99.5206 n.a. n.a. 49657.476 65.164640 3.3638887 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-12 08:30 Nr 08 32 23.42 +22 07 27.2 299.833772 3.417692 n.a. n.a. 1.016492074621 5.2208548 0.00001472943720 -3.7544948 15.3432 /T 164.6573 176.2/ 97.2707 n.a. n.a. 35056.142 54.676966 -31.03037 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-13 08:10 Ct 14 41 53.44 +51 19 37.1 16.611613 0.972594 n.a. n.a. 1.016468259364 5.1516513 0.00001628711467 4.3369006 83.5960 /T 96.4041 111.4/ 92.9197 n.a. n.a. 29659.861 94.268337 36.602610 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Solar Elongation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Solar Elongation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Solar Elongation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-18 21:10 Nt 06 36 55.39 +30 20 33.2 51.846291 0.402897 n.a. n.a. 1.016200335251 -4.9655521 0.00001676888887 2.4365630 19.4346 /L 160.5641 60.0/ 40.1095 n.a. n.a. 33924.454 129.58683 19.507227 >..... Elevation Cut-off Requested .....< >..... Solar Elongation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2025-Jul-19 20:40 At 03 48 24.88 +49 12 08.5 19.110930 2.013688 n.a. n.a. 1.016152312640 -5.4636835 0.00001558500885 -1.0993018 56.2980 /L 123.7003 26.9/ 29.1488 n.a. n.a. 38202.780 117.68334 -8.685647 >..... Elevation Cut-off Requested .....< >..... 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 Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************