185P/Petriew

Last updated
185P/Petriew
Discovery [1]
Discovered by Vance Avery Petriew
Discovery date18 August 2001
Designations
P/2001 Q2, P/2007 A3
Orbital characteristics [2]
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 perihelion12 July 2023
Next perihelion26 December 2028 [3]
TJupiter 2.750
Earth MOID 0.061 AU
Comet total
magnitude
(M1)
13.6 [2]

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]

Contents

Observational history

Vance 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 [2] 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

185P/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]

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References

  1. 1 2 3 4 5 Kronk, Gary. "185P/Petriew". cometography.com. Retrieved 3 November 2024.
  2. 1 2 3 "Small-Body Database Lookup: 185P/Petriew". ssd.jpl.nasa.gov. Retrieved 3 November 2024.
  3. Yoshida, Seiichi. "185P/Petriew". www.aerith.net. Retrieved 3 November 2024.
  4. "Newest comet named for Saskatchewan man". CBC News. 23 August 2001. Retrieved 3 November 2024.
  5. 1 2 Green, Daniel. "IAUC 7686: 2001 Q2; N Cyg 2001 No. 2". www.cbat.eps.harvard.edu. Retrieved 3 November 2024.
  6. "The Edgar Wilson Award Recipients". www.cbat.eps.harvard.edu. Retrieved 7 November 2024.
  7. 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.
  8. Green, Daniel. "IAUC 8795: P/2007 A3". www.cbat.eps.harvard.edu. Retrieved 3 November 2024.
  9. Green, D. W. E. (1 February 2007). "Comets 184P/Lovas and 185P/Petriew". International Astronomical Union Circular. 8803: 4. ISSN   0081-0304.
  10. Green, Daniel (3 November 2024). "NEW METEOR SHOWER M2024-U1 IN LYRA". Central Bureau for Astronomical Telegrams. 5470. Retrieved 3 November 2024.
Numbered comets
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