astro.wikisort.org - Comet167P/CINEOS (P/2004 PY42) is a large periodic comet and active, grey centaur, approximately 66 kilometers (41 miles) in diameter, orbiting the Sun outside the orbit of Saturn in the Solar System. It was discovered on August 10, 2004, by astronomers with the CINEOS survey at Gran Sasso in Italy. It is one of only a handful known Chiron-type comets.
Periodic comet with 65 year orbit
167P/CINEOS|
Discovered by | CINEOS |
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Discovery date | August 10, 2004 |
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Alternative designations | P/2004 PY42 |
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Epoch | 2066-03-11 |
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Aphelion | 20.8 AU |
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Perihelion | 11.77 AU (outside Saturn's orbit) |
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Semi-major axis | 16.28 AU |
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Eccentricity | 0.27705 |
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Orbital period | 65.67 yr |
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Max. orbital speed | 9.8 km/s |
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Min. orbital speed | 5.6 km/s (2033-Nov-30) |
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Inclination | 19.0529° |
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TJupiter | 3.52 |
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Dimensions | 66.17±22.9 km[1] |
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Nucleus albedo | 0.053±0.019 |
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Last perihelion | April 24, 2001[2] |
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Next perihelion |
- March 18, 2066[3]
- March 22, 2066[2]
- March 23, 2066[4]
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The comet nucleus (~66 km) is roughly half the size of C/2014 UN271 (Bernardinelli–Bernstein) and it has a similar perihelion point just outside the orbit of Saturn.
Large comets with perihelion near Saturn's orbit at 10 AU
Comet |
Nucleus diameter |
Perihelion (Sun approach) |
95P/Chiron | 215 km | 8.5 AU |
C/2014 UN271 (Bernardinelli–Bernstein) | 120 km | 10.95 AU |
167P/CINEOS | 66 km | 11.77 AU |
Description
Due to its high Jupiter tisserand of 3.5, and a semi-major axis larger than that of Jupiter, 167P/CINEOS is classified as a Chiron-type comet, named after the groups namesake, 2060 Chiron or 95P/Chiron, designated as both minor planet and comet.[1]
167P/CINEOS was first reported as a minor planet, designated 2004 PY42, but was found to have a very faint asymmetric cometary coma.[5] Contrary to Chiron, which is the prototype object for the dynamical group of centaurs, 167P/CINEOS has no "dual status" as comet and minor planet, and demonstrates the inconsistencies in applying the current rules for designating small Solar System bodies.[6] 167P/CINEOS not only has orbital parameters similar to those of Chiron, but also a low B–R magnitude of 1.29±0.03, which places it into the group grey centaurs.[7]
In June 2039, 167P/CINEOS will pass 1.64 AU from Uranus.[1]
References
- "JPL Small-Body Database Browser: 167P/CINEOS" (2011-10-19 last obs (arc=9.35 years)). Retrieved July 12, 2012.
- "167P/CINEOS Orbit". Minor Planet Center. Retrieved June 18, 2014.
- "Horizons Batch for 167P/CINEOS on 2066-Mar-18" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved June 24, 2022. (JPL#22 Soln.date: 2021-Apr-15)
- Syuichi Nakano (June 18, 2005). "167P/CINEOS (2004 PY42) (NK 1185)". OAA Computing and Minor Planet Sections. Retrieved February 20, 2012.
- Romanishin, W.; Tegler, S. C.; Boattini, A.; de Luise, F.; di Paola, A. (June 2005). "Comet C/2004 PY_42 (cineos)". International Astronomical Union Circular – Central Bureau for Astronomical Telegrams. 8545: 1. Bibcode:2005IAUC.8545....1R. ISSN 0081-0304.
- Green, D. W. E. (June 2005). "Comets 165P/2000 B4, 166P/2001 T4, and 167P/2004 PY_42". International Astronomical Union Circular – Central Bureau for Astronomical Telegrams. 8552: 2. Bibcode:2005IAUC.8552....2G. ISSN 0081-0304.
- Tegler, S. C.; Romanishin, W.; Consolmagno, G. J.; J., S. (December 2016). "Two Color Populations of Kuiper Belt and Centaur Objects and the Smaller Orbital Inclinations of Red Centaur Objects". The Astronomical Journal. 152 (6): 210. Bibcode:2016AJ....152..210T. doi:10.3847/0004-6256/152/6/210. ISSN 0004-6256.
External links
Comets |
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Features |
- Nucleus
- Coma
- Tails
- Antitail
- Comet dust
- Meteor shower
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Types |
- Periodic
- Numbered
- Lost
- Long period
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- Main-belt
- Non-periodic
- Near-parabolic
- Hyperbolic
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- Great Comet
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- Extinct
- Exocomet
- Interstellar
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Related |
- Naming of comets
- Centaur
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- Extraterrestrial atmosphere
- Oort cloud
- Small Solar System body
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Exploration |
- List of missions to comets
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Latest | |
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Culture and speculation |
- Antimatter comet
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Lists of comets (more) |
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Periodic comets | Until 1985 (all) | |
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After 1985 (notable) | |
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Comet-like asteroids | |
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Lost | Recovered | |
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Destroyed | |
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Not found | |
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Visited by spacecraft | |
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Near-Parabolic comets (notable) | Until 1910 | |
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After 1910 | |
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After 1910 (by name) | |
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На других языках
- [en] 167P/CINEOS
[ru] 167P/CINEOS
167P/CINEOS (167P/CINEOS) — короткопериодическая комета из семейства Хирона, которая была открыта 10 августа 2004 года в рамках программы CINEOS. Обладает довольно длинным периодом обращения вокруг Солнца — всего чуть менее 65 лет.
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