Comet Halley Heliocentric Trajectories in HG, HGI, and SE Coordinates

Heliocentric trajectory data for Comet Halley, calculated using the 'Mean of Date' method for the Equinox Epoch. The original trajectory data are sourced from NASA JPL's Horizons system, which contains many more objects. The dataset provides daily data in Heliographic, Heliographic Inertial, and Solar Ecliptic coordinate systems.

Use Cases

• Modeling the heliocentric trajectory of Comet Halley based on coordinate data
• Comparing coordinate transformations between HG, HGI, and SE systems
• Using comet orbit data as a proxy for spacecraft ephemeris near planetary Lagrange points
• Analyzing the drift of the First Point of Aries reference direction over time

Strengths

• Data originates from the authoritative NASA JPL Horizons system
• Coordinates are calculated using a defined 'Mean of Date' method for the Equinox Epoch
• Trajectory data is provided 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
• The description notes that more precise coordinates are found in other NASA directories

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Calculated from original trajectory data taken from NASA JPL's Horizons system

Freshness

Last updated 2026-03-13 11:07:33.718581