128P/Shoemaker–Holt
{{Short description|Periodic comet with 9 year orbit}}
{{For|other comets discovered by Carolyn and Eugene Shoemaker|Comet Shoemaker}}
{{Infobox comet
| name=128P/Shoemaker-Holt
| image=
| discoverer=Carolyn S. Shoemaker
Eugene Merle Shoemaker
Henry E. Holt
| discovery_date=October 18, 1987
| designations=1988 VII; 1996 S2
| epoch=March 6, 2006
| Jupiter_moid = {{Convert|0.153|AU|km|abbr=on}}
| semimajor=4.51 AU
| perihelion=3.068 AU
| aphelion=5.952 AU
| eccentricity=0.3197
| period=9.579 a
| inclination= 4.3555°
| last_p=May 6, 2017? (A)
January 10, 2017{{mpc|128p}}
June 13, 2007
| next_p=2026-Jul-17
2026-Jul-17 (B)
2027-Jan-10? (A)
}}
128P/Shoemaker–Holt, also known as Shoemaker-Holt 1, is a periodic comet in the Solar System. The comet passed close to Jupiter in 1982 and was discovered in 1987. The comet was last observed in March 2018.
The nucleus was split into two pieces (A+B) during the 1997 apparition. Fragment A was last observed in 1996 and only has a 79-day observation arc. Fragment B is estimated to be 4.6 km in diameter.
References
{{reflist
| refs =
|title=128P/Shoemaker-Holt 1 – B (NK 2190)
|publisher=OAA Computing and Minor Planet Sections
|author=Syuichi Nakano
|author-link=Syuichi Nakano
|url=http://www.oaa.gr.jp/~oaacs/nk/nk1367.htm
|date=2006-09-30
|access-date=2012-02-25}}
|title=128P/Shoemaker-Holt 1 – B (NK 3529)
|publisher=OAA Computing and Minor Planet Sections
|author=Syuichi Nakano
|author-link=Syuichi Nakano
|url=http://www.oaa.gr.jp/~oaacs/nk/nk3529.htm
|date=2018-02-01
|access-date=2020-07-11}}
|date=2008-08-10
|title=128P/Shoemaker-Holt 1
|publisher=Seiichi Yoshida's Comet Catalog
|author=Seiichi Yoshida
|url=http://www.aerith.net/comet/catalog/0128P/index.html
|access-date=2012-02-25}}
|type=last observation: 2018-03-21
|title=JPL Small-Body Database Browser: 128P/Shoemaker-Holt 1
|url=https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?des=128P&view=OPC
|publisher=Jet Propulsion Laboratory
|access-date=2017-04-07}}
|type=last observation: 1996-12-04
|title=JPL Small-Body Database Browser: 128P/Shoemaker-Holt 1-A
|url=https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?des=128P-A
|publisher=Jet Propulsion Laboratory
|access-date=2017-04-07}}
|type=last observation: 1999-04-16
|title=JPL Small-Body Database Browser: 128P/Shoemaker-Holt 1-B
|url=https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?des=128P-B&view=OPC
|publisher=Jet Propulsion Laboratory
|access-date=2017-04-08}}
}}
External links
- [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=128P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=128P Horizons Ephemeris]
- [http://www.aerith.net/comet/catalog/0128P/index.html 128P/Shoemaker-Holt 1] – Seiichi Yoshida @ aerith.net
- [http://cometography.com/pcomets/128p.html 128P at Kronk's Cometography]
{{PeriodicComets Navigator|127P/Holt–Olmstead|129P/Shoemaker–Levy}}
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