HelioWeb

Heliocentric Trajectories for Selected Spacecraft, Planets, and Comets
Positions are available in Solar Ecliptic (SE) and Heliographic (HG) (rotating and inertial) systems for 17 Spacecraft, 2 Planets and 8 Comets. These positions, and position differences between any pair of spacecraft, can be obtained as lists or plots, for user-specified time period and time resolution (up to daily resolution). Positions for additional planets are available from the option near the bottom of this page.
These codes were written to support multi-spacecraft studies of solar wind and cosmic ray phenomena; accuracy is tailored to facilitate these studies only. Radial distances should be good at an accuracy of 1%, and angles at 0.1 degree. More accurate data may be available at the JPL (Pasadena,CA) and US Naval Observatory, Washington, DC.
NSSDC has also created a series of Heliospheric Trajectory DATA BOOKS whose text, tables, and plots are accessible.
* DESCRIPTION OF COORDINATE SYSTEMS

List of Heliospheric Objects and their time spans available

 
 
CASSINI            1997  289 - 2004  183  PIONEER 10      1972  063 - 2005  365
EARTH (IMP8,etc *) 1965  001 - 2015  365  PIONEER 11      1973  096 - 1999  365
GALILEO            1989  299 - 2015  365  PHOBOS 2        1988  195 - 1989  030
GIOTTO             1992  001 - 1992  366  SAKIGAKE        1985  021 - 1997  365 
HELIOS 1           1974  345 - 1985  365  STEREOA         2007  001 - 2009  365 
HELIOS 2           1976  001 - 1985  365  STEREOB         2007  001 - 2009  365 
ICE                1984  001 - 1999  365  SUISEI          1989  001 - 1999  365  
MESSENGER          2004  217 - 2010  181  ULYSSES         1990  292 - 2015  343
NEWHORIZONS        2006  033 - 2015  181  VENUS (PVO *)   1978  001 - 1999  365
PIONEER 10         1972  063 - 2005  365  VOYAGER 1       1977  252 - 2015  343 
PIONEER 11         1973  096 - 1999  365  VOYAGER 2       1977  237 - 2015  343

COMET GRIGG-SKJLP  1992  001 - 1993  001  COMET BORRELLY  2000  001 - 2002  365 
COMET H-M-P        1996  001 - 1996  062  COMET WILD 2    2002  001 - 2004  366 
COMET HALE-BOPP    1997  001 - 1997  365  COMET HYAKUTAKE 1995  244 - 1996  366 
COMET HALLEY       1984  001 - 1987  365  COMET GACOBINI-ZINNER 1984  001 - 1986  365
*Orbit data are for the planets and not specifically for the spacecraft in orbit about the planets. On a heliospheric scale, differences are very small. For instance, the heliocentric longitudes of an L1 spacecraft at Ygse = 100 Re and the Earth differ by only 0.25 degrees

Please Click and Fill the Form below, then Submit Query to request parameters


Select an activity
List data Create file Plot data

Name of main S/C or object:

Output coordinate system:

Start year: Start day: Stop year: Stop day:

Time resolution (in days): Equinox Epoch:

Optional: Name of additional S/C or object 2*:
*In this case the difference of between coordinates of main and additional objects will be calculated

If you have any question/comments about the ephemerides data, contact: R. Parthasarathy, Mail Code 690, E-mail: sardi@mail630.gsfc.nasa.gov,
about WWW access to the ephemerides data, contact: Dr. Natalia Papitashvili, E-mail:Natalia.E.Papitashvili@gsfc.nasa.gov, Mail Code 672, NASA/Goddard Spaceflight Center, Greenbelt, MD 20771
NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility