117P/Helin–Roman–Alu

117P/Helin–Roman–Alu, also known as Helin-Roman-Alu 1, is a periodic comet in the Solar System. It is a Quasi-Hilda comet.^[4]

117P/Helin-Roman-Alu

Discovery
Discovered by	Eleanor F. Helin Brian P. Roman Jeff Alu
Discovery date	October 2, 1989
Designations
Alternative designations	1987 XXXVII
Orbital characteristics
Epoch	March 6, 2006
Aphelion	5.123 AU
Perihelion	3.037 AU
Semi-major axis	4.08 AU
Eccentricity	0.2556
Orbital period	8.24 a
Inclination	8.7080°
Last perihelion	2022-Jul-07[1] March 27, 2014[2] December 19, 2005
Next perihelion	2030-Nov-26[3]