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{{Short description|Periodic comet with 6 year orbit}}
{{Infobox Comet
{{Infobox comet
| name=76P/West–Kohoutek–Ikemura
| name=76P/West–Kohoutek–Ikemura
| image= 76P 2019-12-29 image ZTF-sso-752-zr-size-4.0arcmin.png
| image=
| discoverer=[[Richard M. West]] at the [[European Southern Observatory]] Sky Atlas Laboratory, Geneva, [[Lubos Kohoutek]] at the [[Hamburg Observatory]], Germany and [[Toshihiko Ikemura]] in Shinshiro, Japan
| discoverer=[[Richard M. West]] at the [[European Southern Observatory]] Sky Atlas Laboratory, Geneva, [[Lubos Kohoutek]] at the [[Hamburg Observatory]], Germany and [[Toshihiko Ikemura]] in Shinshiro, Japan
| discovery_date=January-March 1975
| discovery_date=January–March 1975
| designations=
| designations=
| epoch= 2014-Dec-9
| epoch= 2014-Dec-9
Line 12: Line 13:
| period=6.48 [[Julian year (astronomy)|yr]]
| period=6.48 [[Julian year (astronomy)|yr]]
| inclination= 30.48°
| inclination= 30.48°
| last_p= 7 May 2013
| last_p= 26 Oct 2019<ref name=MPC/><br/>7 May 2013
| next_p= 26 Oct 2019
| next_p= 2026-04-13<ref name=MPC/>
}}
}}


'''76P/West–Kohoutek–Ikemura''' is a Jupiter-family periodic comet in our Solar System with a current orbital period of 6.48 years. <ref> {{cite web|url = http://cometography.com/pcomets/076P.html| title= 76P/West-Kohoutek-Ikemura|accessdate = 25 February 2015}} </ref> <ref> {{cite web|url = http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0076P|title= Elements and Ephemeris for 76P/West-Kohoutek-Ikemura|publisher= International Astronomical Union|accessdate = 25 February 2015}} </ref>
'''76P/West–Kohoutek–Ikemura''' is a [[Jupiter]]-family [[List of periodic comets|periodic]] [[comet]] in the [[Solar System]] with a current orbital period of 6.48 years.<ref name=MPC/>


The comet was initially spotted on a photographic plate by [[Richard M. West]] at the [[European Southern Observatory]] Sky Atlas Laboratory, Geneva in January 1975, when it had a brightness of [[Magnitude (astronomy)|magnitude]] 12. Unable to predict its movement from a single image the comet was presumed lost.
The comet was initially spotted on a photographic plate by [[Richard M. West]] at the [[European Southern Observatory]] Sky Atlas Laboratory, Geneva in January 1975, when it had a brightness of [[Magnitude (astronomy)|magnitude]] 12.<ref name=kronk/> Inability to predict its movement from a single image meant the comet had to be presumed lost.


In late February it was accidentally rediscovered by [[Lubos Kohoutek]] at the [[Hamburg Observatory]], Germany and independently on 1 March by [[Toshihiko Ikemura]] in Shinshiro, Japan. After further observations the comets parabolic orbit was computed, which gave a perihelion date of 23 March 1975 and proved that all three sightings were of the same object, which was accordingly designated 76P/West–Kohoutek–Ikemura.
In late February it was accidentally rediscovered by [[Lubos Kohoutek]] at the [[Hamburg Observatory]], Germany and independently on 1 March by [[Toshihiko Ikemura]] in Shinshiro, Japan. After further observations the comets parabolic orbit was computed, which gave a perihelion date of 23 March 1975 and proved that all three sightings were of the same object, which was accordingly designated 76P/West–Kohoutek–Ikemura.


Further calculations by B.G.Marsden determined the comet's elliptical orbit and revealed that it had passed only 0.012 AU from Jupiter on 22 March 1972. This close approach had reduced its orbital frequency from some 30 years to the current 6.48 years and its perihelion distance from 4.78 AU to 1.60 AU.
Further calculations by [[Brian G. Marsden]] determined the comet's elliptical orbit and revealed that it had passed only 0.012 AU from Jupiter on 22 March 1972. This close approach had reduced its orbital frequency from some 30 years to the current 6.48 years and its perihelion distance from 4.78 AU to 1.60 AU.


The comet has been observed at its successive returns in 1987, 1993, 2000, 2006 and 2013.
The comet has been observed at its successive returns in 1987, 1993, 2000, 2006 and 2013.


Its nucleus is estimated to have an [[effective radius]] of 0.31 ± 0.01 kilometers and its rotational period is estimated to be 6.6 ± 1 hours.<ref>{{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 }}</ref>

==References==
{{reflist}}


==See also==
==See also==
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==References==
==References==
{{reflist}}
{{reflist
| refs =


<ref name=kronk>{{Cite web
⚫
{{Comets}}
|first=Gary W.
⚫
{{PeriodicComets Navigator|75D/Kohoutek|77P/Longmore}}
|last=Kronk
|author-link=Gary W. Kronk
|title=76P/West-Kohoutek-Ikemura
|url=http://cometography.com/pcomets/076p.html
|access-date=2019-02-26
|archive-url=https://web.archive.org/web/20090808230143/http://www.cometography.com/pcomets/076p.html
|archive-date=2009-08-08
|url-status=dead
}} ([http://cometography.com Cometography Home Page])</ref>


<ref name=MPC>{{cite web
⚫
{{DEFAULTSORT:West–Kohoutek–Ikemura, P076}}
|title=76P/West-Kohoutek-Ikemura Orbit
⚫
[[Category:Comets]]
|url=https://www.minorplanetcenter.net/db_search/show_object?object_id=76P
⚫
[[Category:Astronomical objects discovered in 1975]]
|publisher=[[Minor Planet Center]]
⚫
[[Category:Periodic comets]]
|access-date=2019-02-24}}</ref>


}} <!-- end of reflist-->


== External links ==
{{comet-stub}}
* [https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=76P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=76P Horizons Ephemeris]
* [http://www.aerith.net/comet/catalog/0076P/index.html 76P/West-Kohoutek-Ikemura] – Seiichi Yoshida @ aerith.net

⚫
{{PeriodicComets Navigator|75D/Kohoutek|77P/Longmore}}
⚫
{{Comets}}

⚫
{{DEFAULTSORT:West-Kohoutek-Ikemura, P076}}
⚫
[[Category:Periodic comets]]
[[Category:Numbered comets|0076]]
⚫
[[Category:Comets in 2013]]
⚫
[[Category:Astronomical objects discovered in 1975]]
[[Category:Recovered astronomical objects]]

Latest revision as of 08:45, 26 August 2024

76P/West–Kohoutek–Ikemura
Discovery
Discovered byRichard M. West at the European Southern Observatory Sky Atlas Laboratory, Geneva, Lubos Kohoutek at the Hamburg Observatory, Germany and Toshihiko Ikemura in Shinshiro, Japan
Discovery dateJanuary–March 1975
Orbital characteristics
Epoch2014-Dec-9
Aphelion5.345 AU
Perihelion1.6012 AU
Semi-major axis3.4707 AU
Eccentricity0.5387
Orbital period6.48 yr
Inclination30.48°
Last perihelion26 Oct 2019[1]
7 May 2013
Next perihelion2026-04-13[1]

76P/West–Kohoutek–Ikemura is a Jupiter-family periodic comet in the Solar System with a current orbital period of 6.48 years.[1]

The comet was initially spotted on a photographic plate by Richard M. West at the European Southern Observatory Sky Atlas Laboratory, Geneva in January 1975, when it had a brightness of magnitude 12.[2] Inability to predict its movement from a single image meant the comet had to be presumed lost.

In late February it was accidentally rediscovered by Lubos Kohoutek at the Hamburg Observatory, Germany and independently on 1 March by Toshihiko Ikemura in Shinshiro, Japan. After further observations the comets parabolic orbit was computed, which gave a perihelion date of 23 March 1975 and proved that all three sightings were of the same object, which was accordingly designated 76P/West–Kohoutek–Ikemura.

Further calculations by Brian G. Marsden determined the comet's elliptical orbit and revealed that it had passed only 0.012 AU from Jupiter on 22 March 1972. This close approach had reduced its orbital frequency from some 30 years to the current 6.48 years and its perihelion distance from 4.78 AU to 1.60 AU.

The comet has been observed at its successive returns in 1987, 1993, 2000, 2006 and 2013.

Its nucleus is estimated to have an effective radius of 0.31 ± 0.01 kilometers and its rotational period is estimated to be 6.6 ± 1 hours.[3]

See also

[edit]

References

[edit]
  1. ^ a b c "76P/West-Kohoutek-Ikemura Orbit". Minor Planet Center. Retrieved 2019-02-24.
  2. ^ Kronk, Gary W. "76P/West-Kohoutek-Ikemura". Archived from the original on 2009-08-08. Retrieved 2019-02-26. (Cometography Home Page)
  3. ^ Lamy, P. L.; Toth, I.; Weaver, H. A.; A'Hearn, M. F.; Jorda, L. (11 April 2011). "Properties of the nuclei and comae of 10 ecliptic comets from Hubble Space Telescope multi-orbit observations★: HST observations of 10 ecliptic comets". Monthly Notices of the Royal Astronomical Society. 412 (3): 1573–1590. doi:10.1111/j.1365-2966.2010.17934.x.
[edit]


Numbered comets
Previous
75D/Kohoutek 		76P/West–Kohoutek–Ikemura Next
77P/Longmore
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