Basic NASA/JPL Horizons Pluto Ephemeris
Built Around The NASA/JPL Horizons API
PHP Program by Jay Tanner of Geneva, NY, USA
Optional Location Label
± GPS Longitude °
± GPS Latitude °
± Sea Level Altitude in Meters
Base Time Scale
START
Date and Time
Time Zone
Daylight / Summer Time
STOP
Date and Time
Step Size
Coords Output Mode
Range (Distance) Units
Apply Refraction
Include Object Data
View/Copy Source Code
Double-Click Within Text Area to Select ALL Text
############################################################################# BASIC NASA/JPL HORIZONS TOPOCENTRIC PLUTO EPHEMERIS EPHEMERIS SPAN: AD 1800-JAN-02 23:59:41.3795 UT to AD 2199-DEC-28 23:58:50.8163 UT --------------------------------------------------- NASA/JPL Database ID = 134340 Pluto (999) Base Time Scale = UT Local Time Zone Offset = UT-05:00 (Ignored if using TT scale.) Daylight / Summer Time = No Optional Location Label = Geneva, NY, USA GPS Longitude = -76.996491 ° (+Pos = East) GPS Latitude = +42.868473 ° (+Pos = North) START Era / Date / Time = AD 2026-Oct-11 00:00:00 STOP Era / Date / Time = AD 2026-Oct-31 00:00:01 Ephemeris Step Size = 1 day ******************************************************************* NASA/JPL HORIZONS PLUTO EPHEMERIS DATA OUTPUT FOLLOWS BELOW ******************************************************************* Calend_Date Time RA__HMS Declin__DMS Dist_AU Vis_Mag ----------- -------- ----------- ----------- ------------- ------- 2026-Oct-11 00:00:00 20 25 46.67 -23 38 17.8 35.3436994159 +14.563 2026-Oct-12 00:00:00 20 25 46.09 -23 38 17.4 35.3610250375 +14.565 2026-Oct-13 00:00:00 20 25 45.63 -23 38 16.4 35.3784200665 +14.566 2026-Oct-14 00:00:00 20 25 45.28 -23 38 15.0 35.3958755911 +14.567 2026-Oct-15 00:00:00 20 25 45.07 -23 38 13.0 35.4133884500 +14.569 2026-Oct-16 00:00:00 20 25 44.98 -23 38 10.8 35.4309593624 +14.570 2026-Oct-17 00:00:00 20 25 45.02 -23 38 08.1 35.4485876064 +14.571 2026-Oct-18 00:00:00 20 25 45.17 -23 38 05.1 35.4662670139 +14.573 2026-Oct-19 00:00:00 20 25 45.43 -23 38 01.7 35.4839868499 +14.574 2026-Oct-20 00:00:00 20 25 45.81 -23 37 57.8 35.5017367897 +14.575 2026-Oct-21 00:00:00 20 25 46.31 -23 37 53.4 35.5195115718 +14.576 2026-Oct-22 00:00:00 20 25 46.94 -23 37 48.7 35.5373111807 +14.578 2026-Oct-23 00:00:00 20 25 47.69 -23 37 43.5 35.5551363885 +14.579 2026-Oct-24 00:00:00 20 25 48.55 -23 37 38.0 35.5729836541 +14.580 2026-Oct-25 00:00:00 20 25 49.53 -23 37 32.1 35.5908439347 +14.581 2026-Oct-26 00:00:00 20 25 50.63 -23 37 25.7 35.6087064559 +14.582 2026-Oct-27 00:00:00 20 25 51.86 -23 37 18.8 35.6265640774 +14.583 2026-Oct-28 00:00:00 20 25 53.22 -23 37 11.5 35.6444154564 +14.584 2026-Oct-29 00:00:00 20 25 54.71 -23 37 03.8 35.6622620426 +14.586 2026-Oct-30 00:00:00 20 25 56.31 -23 36 55.8 35.6801025616 +14.587 2026-Oct-31 00:00:00 20 25 58.04 -23 36 47.5 35.6979298933 +14.588 *********************************************************************** BELOW IS THE RAW HORIZONS EPHEMERIS FROM WHICH THE ABOVE WAS EXTRACTED. *********************************************************************** API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Apr 03, 2024 134340 Pluto 999 Pre-computed solution PLU060/DE440. Fit to post New Horizons encounter and Gaia data through 2023. For discussion, see ... M. Brozovic, R. A. Jacobson (2024) "Post-New Horizons orbits and masses for the satellites of Pluto". AJ (in press) PHYSICAL DATA (updated 2021-Jun-07; Mc= Charon mass, radius is IAU 2015): Mass x10^22 (kg) = 1.307+-0.018 Volume, 10^10 km^3 = 0.697 GM (planet) km^3/s^2 = 869.326 Density (R=1195 km) = 1.86 g/cm^3 GM 1-sigma, km^3/s^2 = 0.4 Surface gravity = 0.611 m/s^2 Vol. mean radius (km) = 1188.3+-1.6 Mass ratio (Mc/Mp) = 0.122 Sidereal rot. period = 153.29335198 h Sid. rot. rat, rad/s = 0.0000113856 Mean solar day, h = 153.2820 Mean orbit velocity = 4.67 km/s Sidereal orbit period = 249.58932 yr Escape speed, km/s = 1.21 Perihelion Aphelion Mean Solar Constant (W/m^2) 1.56 0.56 0.88 Maximum Planetary IR (W/m^2) 0.8 0.3 0.5 Minimum Planetary IR (W/m^2) 0.8 0.3 0.5 ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun Oct 11 13:56:10 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Pluto (999) {source: plu060_merged} Center body name: Earth (399) {source: DE441} Center-site name: (user defined site below) ******************************************************************************* Start time : A.D. 2026-Oct-11 00:00:00.0000 UT-05:00 Stop time : A.D. 2026-Oct-31 00:00:01.0000 UT-05:00 Step-size : 1440 minutes ******************************************************************************* Target pole/equ : IAU_PLUTO {East-longitude positive} Target radii : 1188.3, 1188.3, 1188.3 km {Equator_a, b, pole_c} Center geodetic : 283.003509, 42.868473, 0.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 283.003509,4681.90607,4316.80414 {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 : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: plu060_merged} 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 Time zone : UT-05:00 EOP file : eop.261009.p270105 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-OCT-09. PREDICTS-> 2027-JAN-04 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) Table format : Comma Separated Values (spreadsheet) ********************************************************************************************************************** Date_(ZONE)_HR:MN:SS, , , R.A.__(a-app), DEC_(a-app), delta, Azi_(a-app), Elev_(a-app), APmag, S-brt ********************************************************************************************************************** $$SOE 2026-Oct-11 00:00:00, , , 20 25 46.67, -23 38 17.8, 35.3436994158897, 240.405784, -3.338768, 14.563, 9.137 2026-Oct-12 00:00:00, , , 20 25 46.09, -23 38 17.4, 35.3610250375068, 241.055459, -3.970381, 14.565, 9.137 2026-Oct-13 00:00:00, , , 20 25 45.63, -23 38 16.4, 35.3784200665363, 241.701519, -4.605552, 14.566, 9.137 2026-Oct-14 00:00:00, , , 20 25 45.28, -23 38 15.0, 35.3958755910820, 242.344092, -5.244161, 14.567, 9.138 2026-Oct-15 00:00:00, , , 20 25 45.07, -23 38 13.0, 35.4133884500119, 242.983293, -5.886100, 14.569, 9.138 2026-Oct-16 00:00:00, , , 20 25 44.98, -23 38 10.8, 35.4309593623730, 243.619248, -6.531279, 14.570, 9.138 2026-Oct-17 00:00:00, , , 20 25 45.02, -23 38 08.1, 35.4485876064195, 244.252099, -7.179615, 14.571, 9.138 2026-Oct-18 00:00:00, , , 20 25 45.17, -23 38 05.1, 35.4662670139404, 244.882005, -7.831019, 14.573, 9.138 2026-Oct-19 00:00:00, , , 20 25 45.43, -23 38 01.7, 35.4839868499485, 245.509123, -8.485385, 14.574, 9.139 2026-Oct-20 00:00:00, ,m, 20 25 45.81, -23 37 57.8, 35.5017367896589, 246.133597, -9.142601, 14.575, 9.139 2026-Oct-21 00:00:00, ,m, 20 25 46.31, -23 37 53.4, 35.5195115718478, 246.755557, -9.802562, 14.576, 9.139 2026-Oct-22 00:00:00, ,m, 20 25 46.94, -23 37 48.7, 35.5373111806591, 247.375134, -10.465180, 14.578, 9.139 2026-Oct-23 00:00:00, ,m, 20 25 47.69, -23 37 43.5, 35.5551363884733, 247.992477, -11.130378, 14.579, 9.139 2026-Oct-24 00:00:00, ,m, 20 25 48.55, -23 37 38.0, 35.5729836541254, 248.607751, -11.798080, 14.580, 9.139 2026-Oct-25 00:00:00, ,m, 20 25 49.53, -23 37 32.1, 35.5908439346576, 249.221126, -12.468194, 14.581, 9.139 2026-Oct-26 00:00:00, ,m, 20 25 50.63, -23 37 25.7, 35.6087064558957, 249.832764, -13.140618, 14.582, 9.139 2026-Oct-27 00:00:00, ,m, 20 25 51.86, -23 37 18.8, 35.6265640774129, 250.442806, -13.815249, 14.583, 9.139 2026-Oct-28 00:00:00, ,m, 20 25 53.22, -23 37 11.5, 35.6444154563996, 251.051388, -14.492004, 14.584, 9.139 2026-Oct-29 00:00:00, ,m, 20 25 54.71, -23 37 03.8, 35.6622620425897, 251.658654, -15.170813, 14.586, 9.139 2026-Oct-30 00:00:00, ,m, 20 25 56.31, -23 36 55.8, 35.6801025615662, 252.264769, -15.851613, 14.587, 9.139 2026-Oct-31 00:00:00, ,m, 20 25 58.04, -23 36 47.5, 35.6979298933278, 252.869915, -16.534331, 14.588, 9.139 $$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: A time-zone correction has been requested. See header. 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 symbol: '*' 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 (OBSERVING SITE) The solar-presence symbol is immediately followed by a lunar-presence symbol: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric ephemeris 'R.A.__(a-app), DEC_(a-app),' = Airless apparent right ascension and declination of the target center with respect to an instantaneous reference frame defined by the Earth equator of-date (z-axis) and meridian containing the Earth equinox of-date (x-axis EOP-corrected IAU76/80). Compensated for down-leg light-time delay gravitational deflection of light, stellar aberration, precession & nutation. Note: equinox (RA origin) is offset -53 mas from the of-date frame defined by the IAU06/00a P & N system. 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} 'delta,' = Apparent range ("delta", light-time aberrated) of the target center relative to the observer. Units: AU 'Azi_(a-app), Elev_(a-app),' = 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,' = Pluto's approximate apparent visual magnitude and surface brightness. The computed value includes Charon. Values are available only for solar phase angles in the range generally visible from Earth. If that occurs, "n.a." is output. This is to avoid error due to extrapolation of the model beyond its valid data-based limit. 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. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 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 **********************************************************************************************************************
Double-Click Within Text Area to Select ALL Text
NOTE: This ephemeris replaces the older DE405 ephemeris model and uses the newer official NASA/JPL Horizons API to perform the ephemeris computations for im- proved accuracy. When the New Horizons spacecraft flew by Pluto in 2015, it gathered much new data about it, including many detailed images of the system and its moons. Consequently, M. Brozovic and R. A. Jacobson of JPL updated the orbital and other physical data on the Pluto system, including its five satellites. This new data is used in this program to compute the position and distance of Pluto via the NASA/JPL Horizons API, which gives much improved accuracy over older developmental (DExxx) ephemeris models used prior to the fly-by. For the technical details, see: https://iopscience.iop.org/article/10.3847/1538-3881/ad39f0 Post-new-horizons Orbits and Masses for the Satellites of Pluto Marina Brozović and Robert A. Jacobson. Published 2024 May 8 • © 2024. The Author(s). Published by the American Astronomical Society.
PHP Program by Jay Tanner of Geneva, NY, USA
v1.00 - Revised: 1970-January-01-Thursday at Time 00:00:00 (UTC)