3I/ATLAS (C/2025 N1): Ephemeris Data and Orbital Elements

This page provides the current orbital elements and dynamically generated ephemeris data for the interstellar comet 3I/ATLAS. This data is crucial for astronomers tracking the comet's trajectory and planning observations. The information presented here matches the data used in our Live 2D Tracker.

Current Orbital Elements

Data Source: NASA JPL Horizons Small-Body Database.
Solution: JPL#26.
Epoch: 2460978.0 (2025-Oct-29.0) TDB.
Element Symbol Value Description
Eccentricitye6.139587836355706Shape of the orbit (Hyperbolic)
Semi-major Axisa (AU)-0.26391591751781Size of the orbit (Negative for hyperbolic)
Inclinationi (deg)175.1131015287974Tilt relative to the ecliptic (Retrograde)
Long. of Asc. NodeΩ (deg)322.1568699043938Where the orbit crosses the ecliptic
Arg. of Perihelionω (deg)128.0099421020839Orientation of the perihelion
Time of PerihelionTp (JD)2460977.98143925942025-Oct-29 (Approx)

Generated Ephemeris (Geocentric)

The following table provides the predicted position of 3I/ATLAS as seen from Earth (Geocentric coordinates). The data is generated for the next 90 days at 00:00 UTC.

Date (UTC) RA (h m s) Dec (d m s) Delta (AU) r (AU) Mag (V)
Calculating ephemeris data...