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Discovered by Kaoru Ikeya and Shigeki Murakami
Discovery date November 3, 2010
2010 V1; 2015 Y2
Orbital characteristics A
Epoch 2016 Jan. 13[1]
Perihelion 1.573 AU (q)
Eccentricity 0.4904
Orbital period 5.42 yr[1]
Inclination 9.387°
Last perihelion 2010-Oct-13[1]
Next perihelion 2016 Mar. 17 (A)[1]
2016 Mar. 17 (B)[2]

332P/Ikeya–Murakami (P/2010 V1) is a short-period comet with period of approximately 5.4 years[1] first identified independently by the two Japanese amateur astronomers Kaoru Ikeya and Shigeki Murakami on November 3, 2010.[3][4] Ikeya identified the comet using a 25-centimeter (10-inch) reflector at 39×, while Murakami used a 46 cm (18-inch) reflector at 78×.[3] 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.[3]

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.[5] After the 2010 perihelion passage, the comet only had about an 80-day observation arc.[5]

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.[1] A secondary fragment (B) was confirmed and announced on January 5, 2016.[2] The comet is now composed of component A and B with two different comas, envelopes and tails.[2] 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


  1. ^ a b c d e f "MPEC 2016-A10 : COMET P/2010 V1 = 2015 Y2 (Ikeya-Murakami)". IAU Minor Planet Center. 2016-01-02. Retrieved 2016-01-12.  (PK15Y020)
  2. ^ a b c "COMET P/2015 Y2 (IKEYA-MURAKAMI)". Central Bureau for Astronomical Telegrams. 2016-01-05. 
  3. ^ a b c Sinnott, Roger (2010-11-04). "New Binocular Comet in the Morning Sky". Sky & Telescope. Retrieved 2010-11-05. 
  4. ^ "Ikeya–Murakami: The New Comet on the Cosmic Block". NASA. November 17, 2010. Retrieved 14 December 2010. 
  5. ^ a b 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:1404.1630. doi:10.1088/0004-637X/787/1/55. ISSN 0004-637X. 

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