332P/Ikeya–Murakami (P/2010 V1) is a short-period comet with period of approximately 5.4 years first identified independently by the two Japanese amateur astronomers Kaoru Ikeya and Shigeki Murakami on November 3, 2010. Ikeya identified the comet using a 25-centimeter (10-inch) reflector at 39×, while Murakami used a 46 cm (18-inch) reflector at 78×. 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.
|Discovered by||Kaoru Ikeya and Shigeki Murakami|
|Discovery date||November 3, 2010|
|2010 V1; 2015 Y2|
|Orbital characteristics A|
|Epoch||2016 Jan. 13|
|Observation arc||124 days (fragment A)|
|Perihelion||1.573 AU (q)|
|Orbital period||5.42 yr|
|Last perihelion||2021-Aug-18 (A)|
2016 Mar. 17 (A)
2016 Mar. 17 (B)
|Next perihelion||2027-Jan-19? (A)|
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. After the 2010 perihelion passage, the comet only had about an 80-day observation arc.
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. A secondary fragment (B) was confirmed and announced on January 5, 2016. The comet is now composed of component A and B with two different comas, envelopes and tails. 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 had nearly entirely disintegrated, and fragment C hade undergone 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|
- "Cosmic Fragments". www.spacetelescope.org. Retrieved 20 September 2016.
- "MPEC 2016-A10 : COMET P/2010 V1 = 2015 Y2 (Ikeya-Murakami)". IAU Minor Planet Center. 2016-01-02. Retrieved 2016-01-12. (PK15Y020)
- "332P/Ikeya-Murakami Orbit". Minor Planet Center. Retrieved 2017-04-10.
- "COMET P/2015 Y2 (IKEYA-MURAKAMI)". Central Bureau for Astronomical Telegrams. 2016-01-05.
- "Horizons Batch for 332P/Ikeya-Murakami-A (90001260) on 2027-Jan-19?" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2021-09-17. (JPL#15 / Soln.date: 2021-Feb-24 / last obs: 2016-05-05)
- "JPL Small-Body Database Browser: 332P/Ikeya-Murakami-A" (2016-05-05 last obs). Retrieved 2021-09-17.
- Sinnott, Roger (2010-11-04). "New Binocular Comet in the Morning Sky". Sky & Telescope. Archived from the original on 2010-11-10. Retrieved 2010-11-05.
- "Ikeya–Murakami: The New Comet on the Cosmic Block". NASA. November 17, 2010. Retrieved 14 December 2010.
- 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. Bibcode:2014ApJ...787...55I. doi:10.1088/0004-637X/787/1/55. ISSN 0004-637X.