 | |
| Discovery | |
|---|---|
| Discovered by | Eleanor F. Helin Brian P. Roman Jeff Alu |
| Discovery date | October 2, 1989 |
| Designations | |
| 1987 XXXVII | |
| Orbital characteristics | |
| Epoch | March 6, 2006 |
| Aphelion | 5.123 AU |
| Perihelion | 3.037 AU |
| Semi-major axis | 4.08AU |
| Eccentricity | 0.2556 |
| Orbital period | 8.24a |
| Inclination | 8.7080° |
| Last perihelion | 2022-Jul-07[1] March 27, 2014[2] December 19, 2005 |
| Next perihelion | 2030-Nov-26[3] |
117P/Helin–Roman–Alu, also known asHelin-Roman-Alu 1, is aperiodiccomet in theSolar System. It is aQuasi-Hilda comet.[4]
| Numbered comets | ||
|---|---|---|
| Previous 116P/Wild | 117P/Helin–Roman–Alu | Next 118P/Shoemaker–Levy |
 | This comet-related article is astub. You can help Wikipedia byexpanding it. |
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