Neptune Heliocentric Trajectory Data in Multiple Coordinate Systems

Heliocentric trajectory data for the planet Neptune, provided in Heliographic, Heliographic Inertial, and Solar Ecliptic coordinates. The data is produced by NASA using the 'Mean of Date' method for the Equinox Epoch and is sourced from JPL's Horizons system. The dataset was last updated in March 2026.

Use Cases

• Modeling solar wind interactions based on heliocentric trajectory data
• Calculating spacecraft ephemeris proxies based on planetary orbit data
• Analyzing coordinate system transformations between HG, HGI, and SE frames
• Studying long-term orbital drift based on the described FPA drift of about 1.4° per century

Strengths

• Data originates from NASA's authoritative JPL Horizons system
• Coordinates are calculated using the defined 'Mean of Date' method for the Equinox Epoch
• Includes trajectory data in three coordinate systems: Heliographic, Heliographic Inertial, and Solar Ecliptic

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Description metadata is limited; actual data quality requires manual inspection after download

Provenance

Source

National Aeronautics and Space Administration (NASA), sourced from JPL Horizons system

Collection Method

Calculated from original trajectory data using the 'Mean of Date' method for the Equinox Epoch

Time Range

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Freshness

Last updated 2026-03-13 07:41:05.121027; freshness should be verified

Geography

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