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P/2011 S1 (Gibbs)

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P/2011 S1 (Gibbs)
Discovery[1]
Discovered byAlex R. Gibbs
Discovery siteMount Lemmon Survey
Discovery date19 September 2011
Orbital characteristics[2]
Epoch5 June 2013 (JD 2456448.5)
Observation arc8.26 years
Earliest precovery date29 September 2010
Number of
observations
148
Aphelion10.409 AU
Perihelion6.894 AU
Semi-major axis8.652 AU
Eccentricity0.20315
Orbital period25.448 years
Inclination2.679°
218.89°
Argument of
periapsis
193.37°
Mean anomaly342.76°
Last perihelion24 August 2014
Next perihelion2 November 2039[3]
TJupiter3.124
Earth MOID5.903 AU
Jupiter MOID1.885 AU
Physical characteristics[2]
Mean radius
4.0 km (2.5 mi)[4]
  • (B–V) = 0.96±0.11[5]
  • (V–R) = 0.11±0.09[6]
  • (R–I) = 0.26±0.06[6]
  • (B–R) = 1.55±0.11[5]
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

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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.[6]

References

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  1. 1 2 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.
  2. 1 2 "P/2011 S1 (Gibbs) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 6 May 2025.
  3. S. Yoshida (6 February 2022). "P/2011 S1 (Gibbs)". www.aerith.net. Retrieved 6 May 2025.
  4. 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.
  5. 1 2 D. C. Jewitt (2015). "Color Systematics of Comets and Related Bodies". The Astronomical Journal. 150 (6): 201–219. arXiv:1510.07069. Bibcode:2015AJ....150..201J. doi:10.1088/0004-6256/150/6/201.
  6. 1 2 3 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.
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