ARTEMIS-P2 Ephemeris: Daily Heliocentric Trajectories in HG, HGI, and SE Coordinates

Heliocentric trajectory data for the ARTEMIS-P2 spacecraft is derived from NASA JPL's Horizons system. The data provides daily positions in three coordinate systems: Heliographic (HG), Heliographic Inertial (HGI), and Solar Ecliptic (SE), calculated using the 'Mean of Date' method for the Equinox Epoch. NASA maintains this dataset, with a last recorded update in March 2026.

Use Cases

• Modeling spacecraft solar orbit trajectories based on heliocentric coordinate data.
• Comparing spacecraft and planetary orbital paths based on the description of small longitude differences.
• Analyzing coordinate system transformations based on the defined HG, HGI, and SE frames.
• Studying the drift of the First Point of Aries based on the described 1.4° per century rate.

Strengths

• Data originates from the authoritative NASA JPL Horizons system.
• Coordinates are calculated using a specific, documented 'Mean of Date' method for the Equinox Epoch.
• Provides trajectories in three distinct coordinate systems: HG, HGI, and SE.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 10:41:51.893631; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Derived from trajectory data from NASA JPL's Horizons system (http://ssd.jpl.nasa.gov/horizons.cgi).

Freshness

Last updated 2026-03-13 10:41:51.893631.