<pre>API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

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 Revised: April 12, 2021               Jupiter                              599
 
 PHYSICAL DATA (revised 2025-Jan-30):
  Mass x 10^26 (kg)     = 18.9819           Density (g/cm^3)  = 1.3262 +- .0003
  Equat. radius (1 bar) = 71492+-4 km       Polar radius (km)     = 66854+-10
  Vol. Mean Radius (km) = 69911+-6          Flattening            = 0.06487
  Geometric Albedo      = 0.52              Rocky core mass (Mc/M)= 0.0261
  Sid. rot. period (III)= 9h 55m 29.711 s   Sid. rot. rate (rad/s)= 0.00017585
  Mean solar day, hrs   = ~9.9259         
  GM (km^3/s^2)         = 126686531.900     GM 1-sigma (km^3/s^2) =  +- 1.2732
  Equ. grav, ge (m/s^2) = 24.79             Pol. grav, gp (m/s^2) =  28.34
  Vis. magnitude V(1,0) = -9.40
  Vis. mag. (opposition)= -2.70             Obliquity to orbit    =  3.13 deg
  Sidereal orbit period = 11.861982204 y    Sidereal orbit period = 4332.589 d
  Mean daily motion     = 0.0831294 deg/d   Mean orbit speed, km/s= 13.0697
  Atmos. temp. (1 bar)  = 165+-5 K          Escape speed, km/s    =  59.5           
  A_roche(ice)/Rp       =  2.76             Hill&#039;s sphere rad. Rp = 740
                                 Perihelion   Aphelion     Mean
  Solar Constant (W/m^2)         56           46           51
  Maximum Planetary IR (W/m^2)   13.7         13.4         13.6
  Minimum Planetary IR (W/m^2)   13.7         13.4         13.6
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Ephemeris / API_USER Fri Apr  4 09:30:08 2025 Pasadena, USA      / Horizons    
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Target body name: Jupiter (599)                   {source: jup365_merged}
Center body name: Sun (10)                        {source: jup365_merged}
Center-site name: BODYCENTRIC
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Start time      : A.D. 2025-Apr-04 00:00:00.0000 UT      
Stop  time      : A.D. 2025-Apr-11 00:00:00.0000 UT      
Step-size       : 1440 minutes
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Target pole/equ : IAU_JUPITER                     {West-longitude positive}
Target radii    : 71492.0, 71492.0, 66854.0 km    {Equator_a, b, pole_c}       
Center geodetic : 0.0, 0.0, -695700.0             {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 0.0, 0.0, 0.0                   {E-lon(deg),Dxy(km),Dz(km)}
Center pole/equ : IAU_SUN                         {East-longitude positive}
Center radii    : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c}       
Target primary  : Sun
Vis. interferer : None
Rel. light bend : Sun                             {source: jup365_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
EOP file        : eop.250403.p250630                                           
EOP coverage    : DATA-BASED 1962-JAN-20 TO 2025-APR-03. PREDICTS-&gt; 2025-JUN-29
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     n.a.    , 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 )                           
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 Date__(UT)__HR:MN                   r        rdot
**************************************************
$$SOE
 2025-Apr-04 00:00      5.113977314490   0.5986498
 2025-Apr-05 00:00      5.114323758590   0.5999402
 2025-Apr-06 00:00      5.114670131534   0.6006847
 2025-Apr-07 00:00      5.115017326337   0.6006627
 2025-Apr-08 00:00      5.115364735236   0.6031393
 2025-Apr-09 00:00      5.115712895840   0.6019534
 2025-Apr-10 00:00      5.116060856243   0.6027556
 2025-Apr-11 00:00      5.116408295464   0.6012665
$$EOE
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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 &quot;wall-clock&quot; 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 &quot;UT&quot;
may be defined for that location.

  Any &#039;b&#039; symbol in the 1st-column denotes a B.C. date. First-column blank
(&quot; &quot;) 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&#039;s orbital motion and seasons. A &quot;Gregorian-only&quot; calendar mode is
available if such physical events are the primary interest.

  NOTE: &quot;n.a.&quot; in output means quantity &quot;not available&quot; at the print-time.
 
 &#039;r        rdot&#039; =
   The Sun&#039;s apparent range (&quot;r&quot;, light-time aberrated) and range-rate (&quot;rdot&quot;)
relative to the target center, as seen by the observer. A positive &quot;rdot&quot; means
the target center was moving away from the Sun, negative means moving toward
the Sun.  Units: AU and KM/S

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

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