Lemmon

Orbital elements

Semi-major axis

-6,188.362 AU

Eccentricity

1.0008

Inclination

108.3°

Perihelion

4.994 AU

Longitude of ascending node

75.48°

Argument of periapsis

180.42°

Epoch · J2000

JD 2459521.30501 (perihelion)

Orbit class · HYP

Hyperbolic comet

Earth MOID · 1,548.6 LD

3.9793 AU

Orbit quality

Observations used

2,459

Data arc

4.62 years

First observed

27 October 2018

Last observed

9 June 2023

Residual RMS

0.49 ″

Solution · Otto Matic

11 April 2025

Visual & observation

Absolute magnitude (H)

6.4

Total magnitude M₁ · K₁ 8.8

6.4

Discovery & classification

Also known as 2018 U1