87P/Bus: Difference between revisions

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Updated orbital elements from the Minor Planet Center database and the relocation of references to reflist (WP:ILCLUTTER)
 
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{{Short description|Periodic comet with 6 year orbit}}
{{short description|Periodic comet}}
{{Use dmy dates|date=June 2025}}
{{Infobox comet
{{Infobox comet
| name=87P/Bus
| name           = 87P/Bus
| image= Comet 87P Bus u65z1f02r.fits.gz sci.jpg
| image           = Comet 87P Bus u65z1f02r.fits.gz sci.jpg
| discoverer=[[Schelte J. Bus]]
| caption        = Comet 87P/Bus photographed by the [[Hubble Space Telescope]] on 7 June 2001
| discovery_date=1981
| discovery_ref  = {{r|IAUC_3578}}
| designations=Bus/1981b; Bus/1981 XI;
| discoverer     = [[Schelte J. Bus]]
| epoch=March 6, 2006
| discovery_site  = [[UK Schmidt Telescope]]
| semimajor=3.486 [[Astronomical Unit|AU]]
| discovery_date = 2 March 1981
| perihelion=2.174 AU
| mpc_name        = P/1981 E1, P/1987 B4
| aphelion=4.798 AU
| designations    = {{unbulleted|1981 XI, 1987 XXXIV|1994 XVI|1981b, 1987f, 1993b}}
| eccentricity=0.3764
| orbit_ref      = {{r|jpldata|MPC}}
| period=6.509 [[Julian year (astronomy)|a]]
| epoch          = 31 May 2025 ([[Julian day|JD]] 2459000.5)
| inclination= 2.5768°
| observation_arc = 39.57 years
| last_p=May 9, 2020<ref name=MPC>{{cite web
| earliest_precovery_date = 9 February 1981
  |title=87P/Bus Orbit
| obs            = 801
  |url=https://www.minorplanetcenter.net/db_search/show_object?object_id=87P
| perihelion     = 2.099 AU
  |publisher=[[Minor Planet Center]]
| aphelion       = 4.776 AU
  |access-date=2014-06-16}}</ref><br/>{{nobr|December 19, 2013<ref name="NK1931">{{cite web
| semimajor      = 3.438 AU
  |date=2010-04-29
| eccentricity   = 0.38918
  |title=87P/Bus (NK 1931)
| period         = 6.374 years
  |publisher=OAA Computing and Minor Planet Sections
| inclination     = 2.603°
  |author=Syuichi Nakano
| asc_node        = 181.87°
  |author-link=Syuichi Nakano
| arg_peri        = 24.932°
  |url=https://www.oaa.gr.jp/~oaacs/nk/nk1931.htm
| mean            = 3.356°
  |access-date=2012-02-18}}</ref><ref>[https://jcometobs.web.fc2.com/pcmtn/0087p.htm 87P past, present and future orbital elements]</ref>}}<br />July 7, 2007
| tjup            = 3.009
| next_p=2029-Jun-07<ref name="Horizons2029"/>
| Earth_moid      = 1.098 AU
| Jupiter_moid    = 0.181 AU
| physical_ref    = {{r|Lamy_2009}}
| mean_radius    = {{val|0.27|0.01}} km
| rotation        = {{val|32.0|9.0}} hours
| M1              = 12.7
| M2              = 16.1
| magnitude      =  
| last_p          = 9 May 2020
| next_p         = 7 June 2029{{r|Horizons2029}}
}}
}}


Comet '''87P/Bus''' is a [[List of periodic comets|periodic]] [[comet]] with an [[orbital period]] of 6.5 years. It fits the definition of an Encke-type comet with ([[Tisserand's parameter|T<sub>Jupiter</sub>]] > 3; [[Semi-major axis|a]] < a<sub>Jupiter</sub>). It was discovered by [[Schelte J. Bus]] in 1981 on a plate taken with the 1.2m UK Schmidt telescope at [[Siding Spring Observatory|Siding Spring]], Australia. The discovery was announced in [[IAU Circular]] 3578 on March 4, 1981.<ref>{{cite journal |last1=Bus |first1=S. J. |last2=Russell |first2=K. S. |title=Comet Bus (1981b) |journal=International Astronomical Union Circular |date=1 March 1981 |issue=3578 |pages=1 |url=http://www.cbat.eps.harvard.edu/iauc/03500/03578.html |issn=0081-0304}}</ref> It has been observed on each of its subsequent apparitions, most recently in 2020.<ref>{{cite web|url= http://www.aerith.net/comet/catalog/0087P/index.html|title= 87/P Bus|publisher= Seiichi Yoshida| access-date = 15 May 2015}}</ref>
'''87P/Bus''' is a [[List of numbered comets|periodic comet]] with a current orbital period of 6.37 years around the [[Sun]].


Its nucleus is estimated to have an [[effective radius]] of 0.27 ± 0.01 kilometers and to be elongated, with an a/b ratio greater than 2.2. Its rotational period is estimated to be 32 ± 9 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>
== Observational history ==
It was discovered by [[Schelte J. Bus]] in 1981 on a plate taken with the 1.2m UK Schmidt telescope at [[Siding Spring Observatory|Siding Spring]], Australia. The discovery was announced in [[IAU Circular]] 3578 on March 4, 1981.{{r|IAUC_3578}} It has been observed on each of its subsequent apparitions, most recently in 2020.{{r|Yoshida}}


A close approach to [[Jupiter (planet)|Jupiter]] on 13 May 1952, at a distance of 0.0668 AU, lowered the orbital period from 12.46 years and the perihelion distance from 4.43 AU to 6.43 years and 2.13 AU respectively. Another close approach to Jupiter on 24 February 2023, at a distance of 0.182 AU, raised the perihelion to 3.62 AU and the orbital period to 9.58 years.<ref name="Kinoshita">{{cite web
== Physical characteristics ==
  |title=87P/Bus past, present and future orbital elements
Its nucleus is estimated to have an [[effective radius]] of {{val|0.27|0.01}} km and to be elongated, with an a/b ratio greater than 2.2. Its rotational period is estimated to be {{val|32.0|9.0}} hours.{{r|Lamy_2009}}
  |url=https://jcometobs.web.fc2.com/pcmtn/0087p.htm
 
  |work=Comet Orbit
== Orbit ==
  |first=Kazuo |last=Kinoshita
A close approach to [[Jupiter (planet)|Jupiter]] on 13 May 1952, at a distance of {{convert|0.0668|AU|e6km|abbr=unit}}, lowered the orbital period from 12.46 years and the perihelion distance from 4.43 AU to 6.43 years and 2.13 AU respectively. Another close approach to Jupiter on 24 February 2023, at a distance of {{convert|0.182|AU|e6km|abbr=unit}}, raised the perihelion to 3.62 AU and the orbital period to 9.58 years.{{r|Kinoshita}}
  |date=2014-02-13
  |access-date=2024-11-13}}</ref>


== References ==
== References ==
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<ref name="Horizons2029">{{cite web
<ref name="Horizons2029">{{cite web
  |title=Horizons Batch for 87P/Bus (90000883) on 2029-Jun-07
| title= Horizons Batch for 87P/Bus (90000883) on 2029-Jun-07
  |publisher=[[JPL Horizons On-Line Ephemeris System|JPL Horizons]]
| publisher= [[JPL Horizons On-Line Ephemeris System|JPL Horizons]]
  |type=Perihelion occurs when rdot flips from negative to positive
| type= Perihelion occurs when rdot flips from negative to positive
  |url=https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D87P%3BCAP%27&START_TIME=%272029-Jun-05%27&STOP_TIME=%272029-Jun-10%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
| url= https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D87P%3BCAP%27&START_TIME=%272029-Jun-05%27&STOP_TIME=%272029-Jun-10%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
  |accessdate=2022-06-27}} (JPL#K203/18 Soln.date: 2020-Sep-28)</ref>
| access-date= 27 June 2022 }} (JPL#K203/18 Soln.date: 2020-Sep-28)
</ref>
 
<ref name="IAUC_3578">{{cite journal
| author1= S. J. Bus
| author2= K. S. Russell
| editor1= D. W. Green
| title= Comet Bus (1981b)
| url= http://www.cbat.eps.harvard.edu/iauc/03500/03578.html
| journal= IAU Circular
| date= 1 March 1981
| volume= 3578
| issue= 1
| bibcode= 1981IAUC.3578....1B
| issn= 0081-0304 }}
</ref>
 
<ref name="jpldata">{{cite web
| title= 87P/Bus – JPL Small-Body Database Lookup
| url= https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=87P
| website= ssd.jpl.nasa.gov
| publisher= [[Jet Propulsion Laboratory]]
| access-date= 20 March 2016 }}
</ref>
 
<ref name="Kinoshita">{{cite web
| author1= K. Kinoshita
| title= 87P/Bus: Past, Present and Future orbital elements
| url= https://jcometobs.web.fc2.com/pcmtn/0087p.htm
| work= Comet Orbit
| date= 13 February 2014
| access-date= 13 November 2024 }}
</ref>
 
<ref name="Lamy_2009">{{cite journal
| author1= P. L. Lamy
| author2= I. Toth
| author3= H. A. Weaver
| author4= M. F. A'Hearn
| author5= L. Jorda
| title= Properties of the nuclei and comae of 10 ecliptic comets from Hubble Space Telescope multi-orbit observations
| url= https://academic.oup.com/mnras/article-pdf/412/3/1573/3580898/mnras0412-1573.pdf
| journal= Monthly Notices of the Royal Astronomical Society
| year= 2011
| volume= 412
| issue= 3
| pages= 1573–1590
| doi= 10.1111/j.1365-2966.2010.17934.x
| doi-access= free }}
</ref>
 
<ref name="MPC">{{cite web
| title= 87P/Bus Orbit
| url= https://www.minorplanetcenter.net/db_search/show_object?object_id=87P
| publisher= [[Minor Planet Center]]
| access-date= 16 June 2014 }}
</ref>
 
<ref name="Yoshida">{{cite web
| author1= S. Yoshida
| title= 87P/Bus
| url= http://www.aerith.net/comet/catalog/0087P/index.html
| website= www.aerith.net
| access-date= 15 May 2015 }}
</ref>


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


== External links ==
== External links ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=87P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=87P Horizons Ephemeris]
* {{JPL Small Body|id=1000010}}
* [http://www.aerith.net/comet/catalog/0087P/index.html 87P/Bus] – Seiichi Yoshida @ aerith.net
* [http://www.aerith.net/comet/catalog/0087P/index.html 87P/Bus] at Seiichi Yoshida's website


{{PeriodicComets Navigator|86P/Wild|88P/Howell}}
{{PeriodicComets Navigator|86P/Wild|88P/Howell}}
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{{Authority control}}
{{Authority control}}


{{DEFAULTSORT:Bus}}
{{DEFAULTSORT:Bus, 087P}}
[[Category:Periodic comets]]
[[Category:Periodic comets]]
[[Category:Numbered comets|0087]]
[[Category:Numbered comets|0087]]
[[Category:Encke-type comets]]
[[Category:Encke-type comets|087P]]
[[Category:Comets in 2013|087P]]
[[Category:Discoveries by Schelte J. Bus]]
[[Category:Discoveries by Schelte J. Bus]]
[[Category:Comets in 2013|087P]]
[[Category:Astronomical objects discovered in 1981]]
[[Category:Astronomical objects discovered in 1981]]
{{comet-stub}}

Latest revision as of 21:36, 10 June 2025

Template:Short description Template:Use dmy dates Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters".

87P/Bus is a periodic comet with a current orbital period of 6.37 years around the Sun.

Observational history

It was discovered by Schelte J. Bus in 1981 on a plate taken with the 1.2m UK Schmidt telescope at Siding Spring, Australia. The discovery was announced in IAU Circular 3578 on March 4, 1981.Template:R It has been observed on each of its subsequent apparitions, most recently in 2020.Template:R

Physical characteristics

Its nucleus is estimated to have an effective radius of Template:Val km and to be elongated, with an a/b ratio greater than 2.2. Its rotational period is estimated to be Template:Val hours.Template:R

Orbit

A close approach to Jupiter on 13 May 1952, at a distance of Template:Convert, lowered the orbital period from 12.46 years and the perihelion distance from 4.43 AU to 6.43 years and 2.13 AU respectively. Another close approach to Jupiter on 24 February 2023, at a distance of Template:Convert, raised the perihelion to 3.62 AU and the orbital period to 9.58 years.Template:R

References

Template:Reflist

External links


Numbered comets

Template:S-break

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