185P/Petriew is a periodic comet with an orbital period of 5.5 years. It was discovered by amateur astronomer Vance Avery Petriew on 18 August 2001.[1]
| Discovery[1] | |
|---|---|
| Discovered by | Vance Avery Petriew |
| Discovery date | 18 August 2001 |
| Designations | |
| P/2001 Q2, P/2007 A3 | |
| Orbital characteristics[3] | |
| Epoch | 17 April 2015 |
| Aphelion | 5.267 AU |
| Perihelion | 0.934 AU |
| Semi-major axis | 3.100 AU |
| Eccentricity | 0.6988 |
| Orbital period | 5.46 years |
| Inclination | 13.997° |
| 214.101° | |
| Argument of periapsis | 181.938° |
| Last perihelion | 12 July 2023 |
| Next perihelion | 26 December 2028[2] |
| TJupiter | 2.750 |
| Earth MOID | 0.061 AU |
| Comet total magnitude (M1) | 13.6[3] |
Observational history
editVance Avery Petriew discovered the comet visually with a 0.51-m reflector telescope during a star party in Cypress Hills, Canada, on 18 August 2001, while he was searching for the Crab Nebula.[1] He became the third amateur Canadian to discover a comet.[4] Petriew estimated that the comet had an apparent magnitude of 11, a coma about three arcminutes across and no tail.[5] For the discovery V. A. Petriew was awarded the Edgar Wilson Award in 2002.[6] The comet was also observed by other participants of the party. Alan Hale imaged the comet with a CCD on 19 August and estimated the comet had an apparent magnitude of about 13.[5]
The comet continued to brighten during August, reaching magnitude 10. The coma diameter was reported to be 2 to 4 arcminutes. No tail was observed visually, but CCD imaging revealed the presence of a narrow tail.[1] The comet was observed spectographically in September 2001 and was found to have normal production rates of diatomic carbon and water for a Halley-type comet.[7] The comet was quickly found to be periodic, with a period of about 5.5 years. The comet had approached Jupiter to a distance of 0.146 AU (21.8 million km) on 3 July 1982[3] and as a result its perihelion distance was decreased from 1.37 AU to 1.00 AU.[1]
The comet was recovered on 11 January 2007 by F. Fratev, E. Mihaylova, and A. Kirchev using a 0.25m reflector telescope at Zvezdno Obshtestvo Observatory in Plana, Bulgaria. The comet then had an apparent magnitude of 16.1 and a diffuse coma 0.2 arcminutes across.[8] After recovery, the comet was given the number 185P.[9]
Meteor showers
edit185P/Petriew could be the parent body of a meteor shower that was first observed on 26–27 October 2024 with a radiant in Lyra.[10]
References
edit- ^ a b c d e Kronk, Gary. "185P/Petriew". cometography.com. Retrieved 3 November 2024.
- ^ Yoshida, Seiichi. "185P/Petriew". www.aerith.net. Retrieved 3 November 2024.
- ^ a b c "Small-Body Database Lookup: 185P/Petriew". ssd.jpl.nasa.gov. Retrieved 3 November 2024.
- ^ "Newest comet named for Saskatchewan man". CBC News. 23 August 2001. Retrieved 3 November 2024.
- ^ a b Green, Daniel. "IAUC 7686: 2001 Q2; N Cyg 2001 No. 2". www.cbat.eps.harvard.edu. Retrieved 3 November 2024.
- ^ "The Edgar Wilson Award Recipients". www.cbat.eps.harvard.edu. Retrieved 7 November 2024.
- ^ Hicks, Michael D.; Buratti, Bonnie J. (1 November 2002). "Long-slit spectrophotometry of P/Borrelly near the time of the deep space 1 encounter". Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference. 500: 665–668.
- ^ Green, Daniel. "IAUC 8795: P/2007 A3". www.cbat.eps.harvard.edu. Retrieved 3 November 2024.
- ^ Green, D. W. E. (1 February 2007). "Comets 184P/Lovas and 185P/Petriew". International Astronomical Union Circular. 8803: 4. ISSN 0081-0304.
- ^ Green, Daniel (3 November 2024). "NEW METEOR SHOWER M2024-U1 IN LYRA". Central Bureau for Astronomical Telegrams. 5470. Retrieved 3 November 2024.
External links
edit- 185P/Petriew at the JPL Small-Body Database
- The Discovery of Comet Petriew in Vance Petriew's website