91P/Russell

91P/Russell
Discovery
Discovered by	Kenneth S. Russell
Discovery site	Siding Spring Observatory, Australia
Discovery date	14 June 1983
Designations
MPC designation	P/1983 L1; P/1989 A4
Alternative designations	Russell 3; 1982 IX, 1990 VII; 1983i, 1989d;
Orbital characteristics
Epoch	21 November 2025 (JD 2461000.5)
Observation arc	38.21 years
Number of; observations	423
Aphelion	5.207 AU
Perihelion	3.106 AU
Semi-major axis	4.156 AU
Eccentricity	0.25276
Orbital period	8.473 years
Inclination	16.015°
Longitude of; ascending node	242.12°
Argument of; periapsis	356.97°
Mean anomaly	235.59°
Last perihelion	9 November 2020
Next perihelion	26 October 2028
TJupiter	2.921
Earth MOID	1.593 AU
Jupiter MOID	0.084 AU
Physical characteristics
Mean radius	1.26 km (0.78 mi)
Comet total; magnitude (M1)	7.7
Comet nuclear; magnitude (M2)	15.6

91P/Russell, also known as Russell 3, is a Jupiter-family comet with an 8.47-year orbit around the Sun. It was discovered by Kenneth S. Russell in 1983.

References

↑ K. S. Russell (17 June 1983). B. G. Marsden (ed.). "Comet Russell (1983i)". IAU Circular. 3828 (1). Bibcode:1983IAUC.3828....1R.
1 2 "91P/Russell – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 13 April 2026.
↑ "91P/Russell Orbit". Minor Planet Center. Retrieved 16 June 2014.
↑ "Horizons Batch for 91P/Russell (90000904) on 2028-Oct-26" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 29 April 2023. (Soln.date: 2021-Sep-07)
↑ G. Tancredi; J. A. Fernández; H. Rickman; J. Licandro (2006). "Nuclear magnitudes and the size distribution of Jupiter family comets". Icarus. 182 (2): 527–549. Bibcode:2006Icar..182..527T. doi:10.1016/j.icarus.2006.01.007.