90P/Gehrels

90P/Gehrels, also known as Gehrels 1, is a Jupiter-family comet in the Solar System.^[1] The comet nucleus is about 7.8 km in diameter.^[1]

90P/Gehrels

Discovery
Discovered by	Tom Gehrels
Discovery date	11 October 1972
Designations
Alternative designations	Gehrels 1
Orbital characteristics
Epoch	15 June 2002
Observation arc	29 years (1972-2001)
Number of observations	52
Aphelion	9.110 AU
Perihelion	2.966 AU
Semi-major axis	6.038 AU
Eccentricity	0.5088
Orbital period	14.8 yr
Inclination	9.616°
Last perihelion	19 June 2017[1][2] 22 June 2002
Next perihelion	2032-May-19[2]
Physical characteristics
Dimensions	~7.8 km[1]