332P/Ikeya–Murakami

332P/Ikeya–Murakami

332P/Ikeya–Murakami photographed by the Hubble Space Telescope in January 2016.[1]
Discovery
Discovered by Kaoru Ikeya and Shigeki Murakami
Discovery date November 3, 2010
Alternative
designations		 2010 V1; 2015 Y2
Orbital characteristics A
Epoch 2016 Jan. 13[2]
Perihelion 1.573 AU (q)
Eccentricity 0.4904
Orbital period 5.42 yr[2]
Inclination 9.387°
Last perihelion 2010-Oct-13[2]
2005-May
Next perihelion 2016 Mar. 17 (A)[2]
2016 Mar. 17 (B)[3]

332P/Ikeya–Murakami (P/2010 V1) is a short-period comet with period of approximately 5.4 years[2] first identified independently by the two Japanese amateur astronomers Kaoru Ikeya and Shigeki Murakami on November 3, 2010.[4][5] Ikeya identified the comet using a 25-centimeter (10-inch) reflector at 39×, while Murakami used a 46 cm (18-inch) reflector at 78×.[4] Photographic confirmation of the comet was obtained by Ernesto Guido and Giovanni Sostero using a Global-Rent-a-Scope (GRAS) telescope in New Mexico. Both Ikeya and Murakami discovered the comet using manual observation through optical telescopes. Such visual discoveries have become rare in recent years.[4]

At the start of November 2010, a few weeks past perihelion passage, it was discovered the comet had undergone a major outburst between October 31 and November 3.[6] After the 2010 perihelion passage, the comet only had about an 80-day observation arc.[6]

The recovery of P/2010 V1 on December 31, 2015, at magnitude 20 was announced on January 2, 2016, and designated as P/2015 Y2.[2] A secondary fragment (B) was confirmed and announced on January 5, 2016.[3] The comet is now composed of component A and B with two different comas, envelopes and tails.[3] Around January 11, 2016, two fainter potential fragments, designated P/2010 V1-C and P/2010 V1-D have been located, both likely having been fragmented from P/2010 V1-B. As of January 29, fragments B and D have nearly entirely disintegrated, and C is undergoing an outburst, making it as bright as P/2010 V1-A

Comet fragment semimajor axis (AU) perihelion eccentricity inclination M2 approximate size (m) ascending node argument of peri Discovery date
A 3.08642 1.572883 0.49039 9.3869 19.3 470 3.7827 152.442 2016/01/02
B 3.0834 1.57287 0.48989 9.3824 20.8 240 3.796 152.378 2016/01/01
C 3.0894 1.57293 0.49086 9.3870 12.5 10900 3.7810 152.430 2010/11/03
D 3.083 1.5714 0.4904 9.379 19.5 430 3.76 152.6 2016/02/01
E 3.09 1.573 0.491 9.39 22.5 110 3.8 152.5 2016/01/18
F 3.15 1.585 0.496 9.51 22.1 130 3.60 152.4 2016/02/05
G 3.06 1.551 0.494 9.27 20.6 260 3.6 154.5 2016/02/10
H 3.0860 1.57283 0.49033 9.3857 18.9 570 3.786 152.421 2016/02/05
I 3.083 1.5730 0.490 9.38 21.7 160 3.80 152.4 2016/02/05

References

  1. ↑ "Cosmic Fragments". www.spacetelescope.org. Retrieved 20 September 2016.
  2. 1 2 3 4 5 6 "MPEC 2016-A10 : COMET P/2010 V1 = 2015 Y2 (Ikeya-Murakami)". IAU Minor Planet Center. 2016-01-02. Retrieved 2016-01-12. (PK15Y020)
  3. 1 2 3 "COMET P/2015 Y2 (IKEYA-MURAKAMI)". Central Bureau for Astronomical Telegrams. 2016-01-05.
  4. 1 2 3 Sinnott, Roger (2010-11-04). "New Binocular Comet in the Morning Sky". Sky & Telescope. Retrieved 2010-11-05.
  5. ↑ "Ikeya–Murakami: The New Comet on the Cosmic Block". NASA. November 17, 2010. Retrieved 14 December 2010.
  6. 1 2 Ishiguro, Masateru; Jewitt, David; Hanayama, Hidekazu; Usui, Fumihiko; Sekiguchi, Tomohiko; Yanagisawa, Kenshi; Kuroda, Daisuke; Yoshida, Michitoshi; Ohta, Kouji (2014-05-20). "Outbursting Comet P/2010 V1 (Ikeya-Murakami): A Miniature Comet Holmes". The Astrophysical Journal. 787 (1): 55. arXiv:1404.1630Freely accessible. doi:10.1088/0004-637X/787/1/55. ISSN 0004-637X.

External links

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