View source for 105P/Singer Brewster

{{Short description|Periodic comet with 6 year orbit}}
{{Use mdy dates|date=November 2012}}
{{Infobox comet
| name=105P/Singer Brewster
| image= 105P 2018-05-19 image ZTF-sso-473-zr-fov-2.8arcmin.png
| discoverer=[[Stephen Singer-Brewster]]
| discovery_date=May 3, 1986
| designations=1986 XI; 1992 XXVI
| epoch=2011-Feb-08<br/>([[Julian day|JD]] 2455600.5)
| semimajor=3.4709 AU
| perihelion=2.0502 AU
| aphelion=4.8915 [[Astronomical Unit|AU]]
| eccentricity=0.40929
| period=6.47 [[Julian year (astronomy)|yr]]
| inclination=9.1706°
| last_p=2018-Aug-10<ref name=MPC/><br/>February 26, 2012<ref name="Yoshida-105p"/><ref name="NK1762"/><br/>September 11, 2005<br/>April 6, 1999
| next_p=2025-Jan-22<ref name=MPC>{{mpc|105p}}</ref>
}}

'''105P/Singer Brewster''' is a periodic [[comet]] in the [[Solar System]]. It was discovered in 1986, and received the name of '''1986d''' under the old naming system.<ref name=nca/>

Because 105P/Singer Brewster only comes within 2&nbsp;[[Astronomical Unit|AU]] of the Sun,<ref name="jpldata"/> during the 2012 [[Apsis|perihelion]] passage it is only expected to brighten to about [[apparent magnitude]] 17.<ref name="mag2012"/>

The [[comet nucleus]] is estimated to be 2.2 kilometers in diameter.<ref name="jpldata"/>

The orbit of Comet Singer Brewster was altered significantly in August 1976 when it passed within 0.376&nbsp;AU of Jupiter and will be altered again in August 2059.<ref name="kronkscomets"/><ref name=jpl-close/>

The single discoverer bears a hyphenated surname (Singer-Brewster), but co-discovered comets bear the names of the co-discoverers linked by [[hyphen]]s, e.g. [[Comet Shoemaker–Levy 9|Shoemaker-Levy 9]], [[Comet Swift–Tuttle|Swift-Tuttle]], etc. In these cases, the IAU either removes one of the parts of the name or replaces the hyphen by a space.<ref>{{citation|title=IAU Comet-naming Guidelines |publisher=[[International Astronomical Union]] |url=http://www.cbat.eps.harvard.edu/cometnameg.html |url-status=dead |archive-url=https://web.archive.org/web/20160304050435/https://www.cbat.eps.harvard.edu/cometnameg.html |archive-date=March 4, 2016 |df=mdy }}</ref><ref>{{citation |journal= Journal of the Association of Lunar and Planetary Observers  |title= Comet Corner |url=http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?journal=JALPO&year=%3f%3f%3f%3f&volume=..33&letter=.&db_key=GEN&page_ind=26&plate_select=NO&data_type=GIF&type=SCREEN_GIF&classic=YES |author= Don E. Machholz |author-link= Donald Machholz |volume= 33 |pages= 25–28, 26 |issue= 1 |date= 1989 |quote= A hyphen (-) is used in a comet's name only to separate the discoverers. Thus, when sometimes the discover has a double name, the hyphen is dropped from the comet's name in order to show that there was only one discoverer. For example, in 1986 Stephen Singer-Brewster discovered a comet. It is known as "Comet Singer Brewster." |bibcode = 1989JALPO..33...25M }}</ref>

== References ==
{{Reflist
| refs =

<ref name="Yoshida-105p">{{cite web
  |date=2011-02-19
  |title=105P/Singer Brewster
  |publisher=Seiichi Yoshida's Comet Catalog
  |author=Seiichi Yoshida
  |url=http://www.aerith.net/comet/catalog/0105P/index.html
  |access-date=2011-05-03| archive-url= https://web.archive.org/web/20110427031539/http://aerith.net/comet/catalog/0105P/index.html| archive-date= April 27, 2011 <!--Added by DASHBot-->}}</ref>

<ref name="NK1762">{{cite web
  |date=2009-04-21
  |title=105P/Singer Brewster (NK 1762)
  |publisher=OAA Computing and Minor Planet Sections
  |author=Syuichi Nakano
  |author-link=Syuichi Nakano
  |url=http://www.oaa.gr.jp/~oaacs/nk/nk1762.htm
  |access-date=2011-05-03}}</ref>

<ref name="jpldata">{{cite web
  |date=2011-02-05
  |title=JPL Small-Body Database Browser: 105P/Singer Brewster
  |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=105P
  |access-date=2011-05-03}}</ref>

<ref name=nca>[http://www.capitalastronomers.org/SD_year/1986/StarDust_1986_06.pdf Excerpts from the IAU circulars, May 3, 1986], in ''Stardust'' June 1986, issue 10, volume XLII, published by National Capital Astronomers</ref>

<ref name="mag2012">{{cite web
  |title=Magnitude plot for 105P/Singer Brewster in 2012
  |publisher=Comet for Windows
  |url=http://www.aerith.net/comet/catalog/0105P/2012-mag.gif
  |access-date=2011-05-03}}</ref>

<ref name="kronkscomets">{{cite web  
 |title=C&MS: 105P/Singer Brewster
 |url=http://cometography.com/pcomets/105p.html
 |access-date=2012-01-13}}</ref>

<ref name=jpl-close>{{cite web
  |date=2011-02-05
  |title=JPL Close-Approach Data: 105P/Singer Brewster
  |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=105P;cad=1#cad
  |access-date=2012-02-17}}</ref>

}}

==External links==
* {{JPL Small Body|id=1000086}}
*[http://www.aerith.net/comet/catalog/0105P/index.html 105P/Singer Brewster] – Seiichi Yoshida @ aerith.net
*[https://web.archive.org/web/20160304102346/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0105P Elements and Ephemeris for 105P/Singer Brewster] – [[Minor Planet Center]]

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{{DEFAULTSORT:Singer Brewster, 105P}}
[[Category:Periodic comets]]
[[Category:Numbered comets|0105]]
[[Category:Jupiter-family comets|105P]]
[[Category:Comets in 2018|105P]]
[[Category:Astronomical objects discovered in 1986|19860503]]