Horizons Heliocentric Ephemeris DEMO

Horizons Heliocentric Ephemeris DEMO
Built Around the NASA/JPL Horizons API
PHP Program by Jay Tanner of Geneva, NY, USA

NASA/JPL Body ID

Time Scale	Start Date and Time	Time Zone
Daylight/Summer Time	Stop Date and Time	Step Size

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                          HELIOCENTRIC COORDINATES TABLE
                      Computed via the NASA/JPL Horizons API


For JPL Body ID  = 399

Time Scale       = UT
Time Zone        = +00:00  (Time Zone ignored if using TT Time Scale)

Start Date/Time  = AD 2026-Sep-06  00:00:00
Stop  Date/Time  = AD 2026-Sep-06  23:00:01
Ephem Step Size  = 1 hour
Day/Sum     Y/N  = No
****************************************************************************
****************************************************************************

Calendar_Date     Time    Helio_Lon°  Helio_Lat°   Helio_Dist_AU
==============  ========  ==========  ==========  ================
AD 2026-Sep-06  00:00:00  343.060505    0.000548   1.008121231590 
AD 2026-Sep-06  01:00:00  343.100915    0.000547   1.008111160152 
AD 2026-Sep-06  02:00:00  343.141326    0.000545   1.008101083489 
AD 2026-Sep-06  03:00:00  343.181739    0.000544   1.008091001582 
AD 2026-Sep-06  04:00:00  343.222152    0.000542   1.008080914411 
AD 2026-Sep-06  05:00:00  343.262566    0.000541   1.008070821959 
AD 2026-Sep-06  06:00:00  343.302981    0.000540   1.008060724206 
AD 2026-Sep-06  07:00:00  343.343397    0.000538   1.008050621133 
AD 2026-Sep-06  08:00:00  343.383814    0.000537   1.008040512722 
AD 2026-Sep-06  09:00:00  343.424233    0.000536   1.008030398955 
AD 2026-Sep-06  10:00:00  343.464652    0.000534   1.008020279812 
AD 2026-Sep-06  11:00:00  343.505072    0.000533   1.008010155277 
AD 2026-Sep-06  12:00:00  343.545493    0.000532   1.008000025330 
AD 2026-Sep-06  13:00:00  343.585915    0.000530   1.007989889953 
AD 2026-Sep-06  14:00:00  343.626338    0.000529   1.007979749130 
AD 2026-Sep-06  15:00:00  343.666761    0.000528   1.007969602842 
AD 2026-Sep-06  16:00:00  343.707186    0.000527   1.007959451071 
AD 2026-Sep-06  17:00:00  343.747612    0.000525   1.007949293800 
AD 2026-Sep-06  18:00:00  343.788039    0.000524   1.007939131012 
AD 2026-Sep-06  19:00:00  343.828467    0.000523   1.007928962689 
AD 2026-Sep-06  20:00:00  343.868895    0.000522   1.007918788815 
AD 2026-Sep-06  21:00:00  343.909325    0.000520   1.007908609373 
AD 2026-Sep-06  22:00:00  343.949756    0.000519   1.007898424345 
AD 2026-Sep-06  23:00:00  343.990187    0.000518   1.007888233716

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Below is the raw ephemeris table from which the above table was extracted.
The customized smaller table is more compact and suitable for printing.

Notice that the table of interest is contained between two special markers:
$$SOE     Which means Start_Of_Ephemeris
and
$$EOE     Which means End_Of_Ephemeris

The table can consist of from 1 up to multiple lines, depending on Step Size.

The raw tables returned from the Horizons API may need to be reformatted to
a smaller format to be able to be printed on ordinary (80-column) paper.

This program is essentially a demo and does NOT extensively check for errors
in the input arguments, but it gets the basic job done.  Some argument errors
may cause a crash.  Generally, valid input should return valid output, but if
possible, cross-check.


API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

*******************************************************************************
 Revised: April 12, 2021                 Earth                              399
 
 GEOPHYSICAL PROPERTIES (revised May 9, 2022):
  Vol. Mean Radius (km)    = 6371.01+-0.02   Mass x10^24 (kg)= 5.97219+-0.0006
  Equ. radius, km          = 6378.137        Mass layers:
  Polar axis, km           = 6356.752          Atmos         = 5.1   x 10^18 kg
  Flattening               = 1/298.257223563   oceans        = 1.4   x 10^21 kg
  Density, g/cm^3          = 5.51              crust         = 2.6   x 10^22 kg
  J2 (IERS 2010)           = 0.00108262545     mantle        = 4.043 x 10^24 kg
  g_p, m/s^2  (polar)      = 9.8321863685      outer core    = 1.835 x 10^24 kg
  g_e, m/s^2  (equatorial) = 9.7803267715      inner core    = 9.675 x 10^22 kg
  g_o, m/s^2               = 9.82022         Fluid core rad  = 3480 km
  GM, km^3/s^2             = 398600.435436   Inner core rad  = 1215 km
  GM 1-sigma, km^3/s^2     =      0.0014     Escape velocity = 11.186 km/s
  Rot. Rate (rad/s)        = 0.00007292115   Surface area:
  Mean sidereal day, hr    = 23.9344695944     land          = 1.48 x 10^8 km
  Mean solar day 2000.0, s = 86400.002         sea           = 3.62 x 10^8 km
  Mean solar day 1820.0, s = 86400.0         Love no., k2    = 0.299
  Moment of inertia        = 0.3308          Atm. pressure   = 1.0 bar
  Mean surface temp (Ts), K= 287.6           Volume, km^3    = 1.08321 x 10^12
  Mean effect. temp (Te), K= 255             Magnetic moment = 0.61 gauss Rp^3
  Geometric albedo         = 0.367           Vis. mag. V(1,0)= -3.86
  Solar Constant (W/m^2)   = 1367.6 (mean), 1414 (perihelion), 1322 (aphelion)
 HELIOCENTRIC ORBIT CHARACTERISTICS:
  Obliquity to orbit, deg  = 23.4392911  Sidereal orb period  = 1.0000174 y
  Orbital speed, km/s      = 29.79       Sidereal orb period  = 365.25636 d
  Mean daily motion, deg/d = 0.9856474   Hill's sphere radius = 234.9       
*******************************************************************************


*******************************************************************************
Ephemeris / API_USER Sun Sep  6 10:52:21 2026 Pasadena, USA      / Horizons    
*******************************************************************************
Target body name: Earth (399)                     {source: DE441}
Center body name: Sun (10)                        {source: DE441}
Center-site name: BODYCENTRIC
*******************************************************************************
Start time      : A.D. 2026-Sep-06 00:00:00.0000 UT      
Stop  time      : A.D. 2026-Sep-06 23:00:01.0000 UT      
Step-size       : 60 minutes
*******************************************************************************
Target pole/equ : ITRF93 (high precision)         {East-longitude positive}
Target radii    : 6378.137, 6378.137, 6356.752 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: DE441}
Rel. lght bnd GM: 1.3271E+11 km^3/s^2                                          
Atmos refraction: NO (AIRLESS)
RA format       : HMS
Time format     : BOTH
Calendar mode   : Mixed Julian/Gregorian
EOP file        : eop.260904.p261201                                           
EOP coverage    : DATA-BASED 1962-JAN-20 TO 2026-SEP-04. PREDICTS-> 2026-NOV-30
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 )                           
Table format    : Comma Separated Values (spreadsheet)
**************************************************************************************
 Date__(UT)__HR:MN:SS, Date_________JDUT, , ,   hEcl-Lon,  hEcl-Lat,                r 
**************************************************************************************
$$SOE
 2026-Sep-06 00:00:00, 2461289.500000000, , , 343.060505,  0.000548,   1.008121231590 
 2026-Sep-06 01:00:00, 2461289.541666667, , , 343.100915,  0.000547,   1.008111160152 
 2026-Sep-06 02:00:00, 2461289.583333333, , , 343.141326,  0.000545,   1.008101083489 
 2026-Sep-06 03:00:00, 2461289.625000000, , , 343.181739,  0.000544,   1.008091001582 
 2026-Sep-06 04:00:00, 2461289.666666667, , , 343.222152,  0.000542,   1.008080914411 
 2026-Sep-06 05:00:00, 2461289.708333333, , , 343.262566,  0.000541,   1.008070821959 
 2026-Sep-06 06:00:00, 2461289.750000000, , , 343.302981,  0.000540,   1.008060724206 
 2026-Sep-06 07:00:00, 2461289.791666667, , , 343.343397,  0.000538,   1.008050621133 
 2026-Sep-06 08:00:00, 2461289.833333333, , , 343.383814,  0.000537,   1.008040512722 
 2026-Sep-06 09:00:00, 2461289.875000000, , , 343.424233,  0.000536,   1.008030398955 
 2026-Sep-06 10:00:00, 2461289.916666667, , , 343.464652,  0.000534,   1.008020279812 
 2026-Sep-06 11:00:00, 2461289.958333333, , , 343.505072,  0.000533,   1.008010155277 
 2026-Sep-06 12:00:00, 2461290.000000000, , , 343.545493,  0.000532,   1.008000025330 
 2026-Sep-06 13:00:00, 2461290.041666667, , , 343.585915,  0.000530,   1.007989889953 
 2026-Sep-06 14:00:00, 2461290.083333333, , , 343.626338,  0.000529,   1.007979749130 
 2026-Sep-06 15:00:00, 2461290.125000000, , , 343.666761,  0.000528,   1.007969602842 
 2026-Sep-06 16:00:00, 2461290.166666667, , , 343.707186,  0.000527,   1.007959451071 
 2026-Sep-06 17:00:00, 2461290.208333333, , , 343.747612,  0.000525,   1.007949293800 
 2026-Sep-06 18:00:00, 2461290.250000000, , , 343.788039,  0.000524,   1.007939131012 
 2026-Sep-06 19:00:00, 2461290.291666667, , , 343.828467,  0.000523,   1.007928962689 
 2026-Sep-06 20:00:00, 2461290.333333333, , , 343.868895,  0.000522,   1.007918788815 
 2026-Sep-06 21:00:00, 2461290.375000000, , , 343.909325,  0.000520,   1.007908609373 
 2026-Sep-06 22:00:00, 2461290.416666667, , , 343.949756,  0.000519,   1.007898424345 
 2026-Sep-06 23:00:00, 2461290.458333333, , , 343.990187,  0.000518,   1.007888233716 
$$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.
 
 'hEcl-Lon,  hEcl-Lat,' =
     Geometric heliocentric J2000 ecliptic longitude and latitude of target
center at the instant light leaves it to be observed at print time (print time
minus down-leg light-time).  Units: DEGREES
 
 'r,' =
   The Sun's apparent range ("r", light-time aberrated) relative to the target
center, as seen by the observer.  Units: AU

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

**************************************************************************************

PHP Program by Jay Tanner
v1.00 - Revised: 1970-January-01-Thursday at Local Time 12:00:00 AM (UTC−05:00)