147P/Kushida–Muramatsu

{{Short description|Periodic comet with 7 year orbit}}

{{Use dmy dates|date=May 2025}}

{{Infobox comet

| name =147P/Kushida–Muramatsu

| image =

| caption =

| discoverer = Yoshio Kushida and Osamu Muramatsu

| discovery_date = 10 December 1993

| designations = 1993 X1, 2000 T2

| aphelion = {{val|4.856927}}

| perihelion = {{val|2.756415}}

| semimajor = {{val|3.806671}}

| eccentricity = {{val|0.275899}}

| period = 7.43

| inclination = 2.3673°

| last_p = February 27, 2016
September 22, 2008

| next_p = 2023-Dec-06{{cite web

|title=Horizons Batch for 147P/Kushida-Muramatsu (90001071) on 2023-Dec-06

|publisher=JPL Horizons

|type=Perihelion occurs when rdot flips from negative to positive

|url=https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D147P%3BCAP%27&START_TIME=%272023-Dec-06%27&STOP_TIME=%272023-Dec-07%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27

|accessdate=2023-04-29}} (JPL#K083/2 Soln.date: 2009-Mar-12)

| dimensions = 0.42 km{{cite journal |last1=Lamy |first1=P. L. |last2=Toth |first2=I. |last3=Weaver |first3=H. A. |last4=A'Hearn |first4=M. F. |last5=Jorda |first5=L. |title=Properties of the nuclei and comae of 10 ecliptic comets from Hubble Space Telescope multi-orbit observations★: HST observations of 10 ecliptic comets |journal=Monthly Notices of the Royal Astronomical Society |date=11 April 2011 |volume=412 |issue=3 |pages=1573–1590 |doi=10.1111/j.1365-2966.2010.17934.x|doi-access=free }}

}}

147P/Kushida–Muramatsu is a quasi-Hilda comet discovered in 1993 by Japanese astronomers Yoshio Kushida and Osamu Muramatsu.

According to calculations made by Katsuhiko Ohtsuka of the Tokyo Meteor Network and David Asher of Armagh Observatory, Kushida–Muramatsu was temporarily captured by Jupiter as an irregular moon between 14 May 1949, and 15 July 1962, ({{val|12.17|+0.29|-0.27}} years). It is the fifth such object known to have been captured.{{cite web

|author=Kerensa McElroy

|title=Captured comet becomes moon of Jupiter

|url=http://www.cosmosmagazine.com/news/3003/captured-comet-becomes-moon-jupiter

|date=14 September 2009

|work=Cosmos Online

|access-date=14 September 2009

|archive-url=https://web.archive.org/web/20090918085932/http://www.cosmosmagazine.com/news/3003/captured-comet-becomes-moon-jupiter

|archive-date=18 September 2009

|url-status=dead

}}

It is thought that quasi-Hilda comets may be escaped Hilda asteroids. Comet Shoemaker–Levy 9, which collided with Jupiter in 1994, is a more famous example of a quasi-Hilda comet.