P/2011 S1 (Gibbs)
| Discovery[1] | |
|---|---|
| Discovered by | Alex R. Gibbs |
| Discovery site | Mount Lemmon Survey |
| Discovery date | 19 September 2011 |
| Orbital characteristics[3] | |
| Epoch | 5 June 2013 (JD 2456448.5) |
| Observation arc | 8.26 years |
| Earliest precovery date | 29 September 2010 |
| Number of observations | 148 |
| Aphelion | 10.409 AU |
| Perihelion | 6.894 AU |
| Semi-major axis | 8.652 AU |
| Eccentricity | 0.20315 |
| Orbital period | 25.448 years |
| Inclination | 2.679° |
| 218.89° | |
| Argument of periapsis | 193.37° |
| Mean anomaly | 342.76° |
| Last perihelion | 24 August 2014 |
| Next perihelion | 2 November 2039[2] |
| TJupiter | 3.124 |
| Earth MOID | 5.903 AU |
| Jupiter MOID | 1.885 AU |
| Physical characteristics[3][4][5] | |
Mean diameter | < 8.0 km (5.0 mi) |
| (V–R) = 0.11±0.09 (R–I) = 0.26±0.06 | |
| Comet total magnitude (M1) | 7.1 |
| Comet nuclear magnitude (M2) | 11.5 |
P/2011 S1 (Gibbs) is a periodic comet or an active centaur with a 25-year orbit around the Sun.
Discovery
[edit]American astronomer, Alex R. Gibbs, reported the discovery of a new object from CCD images obtained from the 1.5 m (4.9 ft) reflector telescope from the Mount Lemmon Survey on 19 September 2011.[1] Precovery images show that the object produced comet-like activity as early as September 2010, a year before its discovery.[5]
References
[edit]- ^ a b A. R. Gibbs; S. F. Tornero; G. V. Williams (November 2011). D. W. Green (ed.). "Comet P/2011 S1 (Gibbs)". IAU Circular. 9234. Bibcode:2011IAUC.9234....1G.
- ^ S. Yoshida (6 February 2022). "P/2011 S1 (Gibbs)". www.aerith.net. Retrieved 6 May 2025.
- ^ a b "P/2011 S1 (Gibbs) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 6 May 2025.
- ^ I. Kulyk; P. Korsun; P. Rousselot; V. Afanasiev; O. Ivanova (2016). "P/2008 CL94 (Lemmon) and P/2011 S1 (Gibbs): Comet-like Activity at Large Heliocentric Distances". Icarus. 271: 314–325. doi:10.1016/j.icarus.2016.01.037.
- ^ a b H. W. Lin; Y. T. Chen; P. Lacerda; W. H. Ip; M. Holman; et al. (2014). "Pan-STARRS 1 Observations of the Unusual Active Centaur P/2011 S1(Gibbs)". The Astronomical Journal. 147 (5): 114–121. arXiv:1402.6403. Bibcode:2014AJ....147..114L. doi:10.1088/0004-6256/147/5/114.
External links
[edit]- P/2011 S1 at the JPL Small-Body Database
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