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Comet

Leonard

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C/2021 A1 (Leonard)

Orbital elements

Semi-major axis
-6,122.882 AU
Eccentricity
1.0001
Inclination
132.69°
Perihelion
0.615 AU
Longitude of ascending node
255.89°
Argument of periapsis
225.09°
Epoch · J2000
JD 2459582.79268 (perihelion)
Orbit class · HYP
Hyperbolic comet
Earth MOID · 90.3 LD
0.232 AU

Orbit quality

Observations used
2,422
Data arc
651 days
First observed
11 April 2020
Last observed
22 January 2022
Residual RMS
0.65 ″
Solution · Otto Matic
2 January 2025

Visual & observation

Absolute magnitude (H)
12.5
Total magnitude M₁ · K₁ 4.5
12.5

Discovery & classification

Also known as 2021 A1

Named

Sources