122P/de Vico

122P/de Vico
Discovery
Discovered by Francesco de Vico
Discovery date 20 February 1846
Alternative
designations		 1846 IV, P/1846 D1, P/1995 S1
Orbital characteristics A
Aphelion 34.70 AU
Perihelion 0.659337 AU
Semi-major axis 17.6808 AU
Eccentricity 0.962709
Orbital period 74.35 yr
Inclination 85.3828°
Last perihelion October 6, 1995
Next perihelion 2069-Oct-14[1][2][3]
October 21, 2069[4]

122P/de Vico (provisional designation: 1846 D1) is a periodic comet with an orbital period of 74 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).[5] It was discovered by Francesco de Vico in Rome on February 20, 1846.

On 3 December 2153 the comet will pass about 0.694 AU (103,800,000 km; 64,500,000 mi) from Uranus.[6]

Daniel Kirkwood in 1884 noticed that the comet shares elements with comet 12P/Pons-Brooks. He suggested that 122P had calved off Pons-Brooks some centuries prior. Later he identified the two comets' capture into their elliptical orbits (or their parent body's capture) with their shared aphelion close to Neptune 991 CE.[7]


References

  1. ↑ Syuichi Nakano (19 November 1999). "122P/de Vico (NK 724)". OAA Computing and Minor Planet Sections. Retrieved 2 February 2012.
  2. ↑ Horizons output. "Observer Table for Comet 122P/de Vico (1996)". Retrieved 13 June 2011. (Observer Location:@sun)
  3. ↑ "122P/de Vico Orbit". Minor Planet Center. Retrieved 17 June 2014.
  4. ↑ Seiichi Yoshida (9 November 2005). "122P/de Vico". Seiichi Yoshida's Comet Catalog. Retrieved 20 February 2012.
  5. ↑ "JPL Small-Body Database Browser: 122P/de Vico". Jet Propulsion Laboratory. 25 June 1996. Retrieved 26 July 2012.
  6. ↑ "JPL Close-Approach Data: 122P/de Vico". 25 June 1996. Retrieved 24 February 2012.
  7. ↑ Daniel Kirkwood (1886). "The Comets 1812 I, and 1846 IV". The Sidereal Messenger. 5: 13–14.
Numbered comets
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121P/Shoemaker–Holt 		122P/de Vico Next
123P/West–Hartley
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