Helin-Lawrence

Orbital elements

Semi-major axis

-3,604.186 AU

Eccentricity

1.0004

Inclination

95.46°

Perihelion

1.518 AU

Longitude of ascending node

11.84°

Argument of periapsis

271.16°

Epoch · J2000

JD 2448641.52620 (perihelion)

Orbit class · HYP

Hyperbolic comet

Earth MOID · 478.5 LD

1.2296 AU

Orbit quality

Observations used

108

Data arc

585 days

First observed

23 February 1991

Last observed

30 September 1992

Residual RMS

0.59 ″

Solution · Otto Matic

15 April 2021

Visual & observation

Absolute magnitude (H)

9.1

Total magnitude M₁ · K₁ 5.5

9.1

Discovery & classification

Also known as 1991 F2