Ulysses Ephemeris: Heliocentric Trajectories in HG, HGI, and SE Coordinates

Daily trajectory data for the Ulysses spacecraft, calculated using the 'Mean of Date' method for the Equinox Epoch. The data provides heliocentric positions in Heliographic (HG), Heliographic Inertial (HGI), and Solar Ecliptic (SE) coordinate systems. The original trajectory data are sourced from NASA JPL's Horizons system and processed by NASA.

Use Cases

• Modeling spacecraft trajectories based on heliocentric coordinate data.
• Analyzing solar wind interactions based on spacecraft position relative to the sun.
• Comparing coordinate systems (HG, HGI, SE) for astronomical calculations.
• Validating orbital models using precise ephemeris data from NASA JPL.

Strengths

• Data is derived from NASA JPL's Horizons system, an authoritative source for ephemeris.
• Coordinates are calculated using the 'Mean of Date' method for the Equinox Epoch, a defined standard.
• The dataset provides daily data points, suggesting regular temporal coverage.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats include BIN and HTML, which may require specialized tools for processing.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Original trajectory data taken from NASA JPL's Horizons system and processed into HG, HGI, and SE coordinates.

Freshness

Last updated 2026-03-13 09:10:55.937979; freshness should be verified.