Helios 1 Ephemeris: Daily Heliocentric Trajectory Coordinates

Helios 1 spacecraft trajectory data in Heliographic, Heliographic Inertial, and Solar Ecliptic coordinates, produced daily. The data originates from NASA's JPL Horizons system and has been processed using the 'Mean of Date' method for the Equinox Epoch. The dataset is maintained by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Model solar wind propagation based on heliocentric spacecraft position.
• Correlate spacecraft instrument readings with its location in heliographic coordinates.
• Validate orbital mechanics simulations using precise ephemeris data.
• Study long-term solar system reference frame drift using the documented Equinox Epoch methods.

Strengths

• Data is sourced from the authoritative JPL Horizons system.
• Coordinates are calculated using a defined 'Mean of Date' method for consistency.
• Dataset is updated with a timestamp from March 2026.

Limitations

• Row count and data volume are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Description notes that more precise and planet-centered coordinates are available elsewhere.

Provenance

Source

National Aeronautics and Space Administration, JPL Horizons

Collection Method

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

Time Range

Daily data; specific temporal coverage is not stated.

Freshness

Last updated 2026-03-13 07:30:29.566704

Geography

Heliocentric (solar system).