117P/Helin–Roman–Alu
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] |
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]
References
- ^ "117P/Helin-Roman-Alu Orbit". Minor Planet Center. Retrieved 2014-06-17.
- Syuichi Nakano (2011-04-06). "117P/Helin-Roman-Alu 1 (NK 2051)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-20.
- ^ "Horizons Batch for 117P/Helin-Roman-Alu 1 (90001003) on 2030-Nov-26" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2023-07-06. (JPL#K222/63 Soln.date: 2023-Jul-06)
- .
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 117P/Helin-Roman-Alu 1 – Seiichi Yoshida @ aerith.net
- Elements and Ephemeris for 117P/Helin-Roman-Alu – Minor Planet Center
- 117P at Kronk's Cometography
- Images of 117P by Roger Groom
.png)
 | This comet-related article is a stub. You can help Wikipedia by expanding it. |