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Example Ephemeris

The text below shows what a typical ephemeris generated by HORIZONS should look like - it was copied and pasted directly out of a browser window. Ephemerides that do not conform to the HORIZONS format will be rejected by the OT.

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 Revised: June 21, 2016                 Mars                            499 / 4
 
 PHYSICAL DATA (updated 2019-Oct-29):
  Vol. mean radius (km) = 3389.92+-0.04   Density (g/cm^3)      =  3.933(5+-4)
  Mass x10^23 (kg)      =    6.4171       Flattening, f         =  1/169.779
  Volume (x10^10 km^3)  =   16.318        Equatorial radius (km)=  3396.19
  Sidereal rot. period  =   24.622962 hr  Sid. rot. rate, rad/s =  0.0000708822 
  Mean solar day (sol)  =   88775.24415 s Polar gravity m/s^2   =  3.758
  Core radius (km)      = ~1700           Equ. gravity  m/s^2   =  3.71
  Geometric Albedo      =    0.150                                              

  GM (km^3/s^2)         = 42828.375214    Mass ratio (Sun/Mars) = 3098703.59
  GM 1-sigma (km^3/s^2) = +- 0.00028      Mass of atmosphere, kg= ~ 2.5 x 10^16
  Mean temperature (K)  =  210            Atmos. pressure (bar) =    0.0056 
  Obliquity to orbit    =   25.19 deg     Max. angular diam.    =  17.9"
  Mean sidereal orb per =    1.88081578 y Visual mag. V(1,0)    =  -1.52
  Mean sidereal orb per =  686.98 d       Orbital speed,  km/s  =  24.13
  Hill's sphere rad. Rp =  319.8          Escape speed, km/s    =   5.027
                                 Perihelion  Aphelion    Mean
  Solar Constant (W/m^2)         717         493         589
  Maximum Planetary IR (W/m^2)   470         315         390
  Minimum Planetary IR (W/m^2)    30          30          30
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Ephemeris / WWW_USER Wed Feb 26 02:44:17 2020 Pasadena, USA      / Horizons    
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Target body name: Mars (499)                      {source: mar097}
Center body name: Earth (399)                     {source: mar097}
Center-site name: Atacama Large mm/sub-mm Array (ALMA) Center of Array
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Start time      : A.D. 2020-Feb-26 00:00:00.0000 UT      
Stop  time      : A.D. 2020-Mar-27 00:00:00.0000 UT      
Step-size       : 20 minutes
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Target pole/equ : IAU_MARS                        {West-longitude positive}
Target radii    : 3396.2 x 3396.2 x 3376.2 km     {Equator, meridian, pole}    
Center geodetic : 292.245252,-23.029211,5.0748870 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 292.245252,5877.51430,-2481.682 {E-lon(deg),Dxy(km),Dz(km)}
Center pole/equ : High-precision EOP model        {East-longitude positive}
Center radii    : 6378.1 x 6378.1 x 6356.8 km     {Equator, meridian, pole}    
Target primary  : Sun
Vis. interferer : MOON (R_eq= 1737.400) km        {source: mar097}
Rel. light bend : Sun, EARTH                      {source: mar097}
Rel. lght bnd GM: 1.3271E+11, 3.9860E+05 km^3/s^2                              
Atmos refraction: NO (AIRLESS)
RA format       : HMS
Time format     : CAL 
RTS-only print  : NO       
EOP file        : eop.200212.p200505                                           
EOP coverage    : DATA-BASED 1962-JAN-20 TO 2020-FEB-12. PREDICTS-> 2020-MAY-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 )                           
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 Date__(UT)__HR:MN     R.A._________(ICRF)_________DEC            delta      deldot
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$$SOE
 2020-Feb-26 00:00 Am  18 27 26.444179 -23 37 59.47962 1.74527309827464 -14.1434211
 2020-Feb-26 00:20 Am  18 27 28.983357 -23 37 58.60534 1.74515951510102 -14.1774174
 2020-Feb-26 00:40  m  18 27 31.522745 -23 37 57.74278 1.74504565810281 -14.2116532
 2020-Feb-26 01:00     18 27 34.062118 -23 37 56.89199 1.74493152640344 -14.2458679
 2020-Feb-26 01:20     18 27 36.601251 -23 37 56.05289 1.74481712121645 -14.2798013
 2020-Feb-26 01:40     18 27 39.139922 -23 37 55.22531 1.74470244583624 -14.3131951
 2020-Feb-26 02:00     18 27 41.677912 -23 37 54.40897 1.74458750561302 -14.3457953
 2020-Feb-26 02:20     18 27 44.215007 -23 37 53.60348 1.74447230791205 -14.3773539
 2020-Feb-26 02:40     18 27 46.750998 -23 37 52.80837 1.74435686205759 -14.4076306
 2020-Feb-26 03:00     18 27 49.285688 -23 37 52.02304 1.74424117926187 -14.4363953
$$EOE
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The ALMA OT Team, 2021 Feb 03