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Comet

PANSTARRS

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C/2021 S3 (PANSTARRS)

Orbital elements

Semi-major axis
-5,378.326 AU
Eccentricity
1.0002
Inclination
58.53°
Perihelion
1.32 AU
Longitude of ascending node
215.62°
Argument of periapsis
6.85°
Epoch · J2000
JD 2460355.21037 (perihelion)
Orbit class · HYP
Hyperbolic comet
Earth MOID · 123.8 LD
0.318 AU
Tisserand (Jupiter)
0.744

Orbit quality

Observations used
4,867
Data arc
5.06 years
First observed
6 December 2020
Last observed
27 December 2025
Residual RMS
0.42 ″
Solution · Otto Matic
28 July 2026

Visual & observation

Absolute magnitude (H)
10.7
Total magnitude M₁ · K₁ 4.5
10.7

Discovery & classification

Also known as 2021 S3

Named

Sources