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108P/Ciffréo

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Also known as 1985p Ciffreo, 1985 XVI Ciffreo, 1992s Ciffreo, 1993 I Ciffreo

108P/Ciffréo is a Jupiter-family comet with an orbital period of 7.25 years around the Sun. It is the only comet discovered by French astronomer, Jacqueline Ciffréo. The comet is noted for having a peculiar double morphology, in which the nucleus is accompanied by a comoving, detached, diffuse tail, which is probably a perspective artifact of particles ejected sunwards and then repelled by solar wind.

Key facts

Comet.semimajor
3.744 AU
Comet.eccentricity
0.581
Comet.name
108P/Ciffréo
Comet.image
Comet 108PCiffreo - Ajacba07f2 hr.jpg
Comet.caption
Comet Ciffréo imaged by the Hubble Space Telescope from 31 January to 24 May 2022.
Comet.discoverer
Jacqueline Ciffréo
Comet.discovery_site
Caussols, France
Comet.discovery_date
8 November 1985
Comet.mpc_name
P/1985 V1, P/1992 S1
Comet.epoch
21 November 2025 (JD 2461000.5)
Comet.observation_arc
36.38 years
Comet.obs
2,612
Comet.perihelion
1.664 AU
Comet.aphelion
5.824 AU
Comet.period
7.245 years
Comet.inclination
11.432°
Comet.asc_node
50.274°
Comet.arg_peri
354.56°

via Wikipedia infobox

Wikidata facts

Parent body
Sun
Diameter
3.2
Orbital period
2539.121660463486
Image
Comet 108PCiffreo - Ajacba07f2 hr.jpg
Show 13 more facts
time of discovery or invention
1985-11-08
provisional designation
1985p
absolute magnitude
10.9
orbital eccentricity
0.5810134476572392
semi-major axis of an orbit
3.642420282502351
periapsis
1.526125116349005
apoapsis
5.758715448655698
orbital inclination
13.98015613499469
longitude of ascending node
52.40239463092706
argument of periapsis
356.8617072910779
mean anomaly
184.0170422340704
time of periapsis
2459498.7281664885
Sources (3)

via Wikidata · CC0

~3 min read

Encyclopedic overview

4 sections
Contents
  • Observational history
  • Orbit
  • References
  • External links

108P/Ciffréo is a Jupiter-family comet with an orbital period of 7.25 years around the Sun. It is the only comet discovered by French astronomer, Jacqueline Ciffréo. The comet is noted for having a peculiar double morphology, in which the nucleus is accompanied by a comoving, detached, diffuse tail, which is probably a perspective artifact of particles ejected sunwards and then repelled by solar wind.

== Observational history == The comet was discovered by Jacqueline Ciffréo on 8 November 1985 using a 0.9 m Schmidt camera at Caussols. The comet was then a diffuse object with an apparent magnitude of 10. H. Kosai from the Tokyo Observatory noticed on 9 November that it also had a faint tail about 1.5 arcminutes long. An elliptical orbit was published by Daniel W. E. Green on 18 November, with an estimated orbital period of 7.81 years, while perihelion had taken place on 28 October 1985 at a distance of . Further observations revealed that the perihelion was on 30 October and the orbital period of the comet was 7.22 years. In December 1985, a detacted coma or tail was detected 6 arcseconds from the nucleus of the comet and extending for 20 arcseconds to the north-east. The visual magnitude of the comet was estimated to be 12.5.

Excerpted from Wikipedia’s “108P/Ciffréo” article, available under the CC BY-SA 4.0 licence.