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{| class="wikitable" align="right" style="margin: 1em; margin-top: 0;"
{| class="wikitable floatright" style="font-size: 0.9em;"
|+ '''[[Asteroid]]s discovered: 8'''
|+ [[Minor planet]]s discovered: 8&thinsp;<ref name="MPC-Discoverers" />
|-
| [[1600 Vyssotsky]] || October 22, 1947
| [[1600 Vyssotsky]] || October 22, 1947
|-
|-
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| [[(29075) 1950 DA]] || February 22, 1950
| [[(29075) 1950 DA]] || February 22, 1950
|}
|}
'''Carl Alvar Wirtanen''' (November 11, 1910, [[Kenosha, Wisconsin]] – March 7, 1990 [[Santa Cruz, California]]) was an [[United States|American]] [[astronomer]] who worked at [[Lick Observatory]].


'''Carl Alvar Wirtanen''' (November 11, 1910, [[Kenosha, Wisconsin]] – March 7, 1990 [[Santa Cruz, California]]) was an [[United States|American]] [[astronomer]] and discoverer of [[comet]]s and [[minor planet]]s who worked at [[Lick Observatory]].<ref name="Obituary-by-Klemola" /><ref name="springer" />
He discovered periodic [[comet]] [[46P/Wirtanen]], as well as eight [[asteroid]]s, including notably the [[Apollo asteroid]] [[(29075) 1950 DA]], which may have a non-negligible probability of impacting the earth in the year 2880. He also discovered two other Apollo asteroids: [[1685 Toro]] and [[1863 Antinous]]. The Shane Wirtanen Catalogue, a count of galaxies, was his major work published in 1954.<ref>{{cite journal| bibcode= 1989ApJ...338..605B| title= The Shane Wirtanen counts: Observability of the galaxy correlation function| journal= Astrophysical Journal| volume= 338| pages= 605| author1= Brown| first1= Michael E.| last2= Groth| first2= Edward J.| year= 1989| doi= 10.1086/167222}}</ref> He was of Finnish ancestry.<ref>{{cite journal | bibcode= 1991BAAS...23.1495K| title= Obituary: Carl Alvar Wirtanen, 1910–1990| journal= Bulletin of the American Astronomical Society| volume= 23| pages= 1495| author1= Klemola| first1= Arnold Richard| year= 1991}}</ref>


He discovered periodic comet [[46P/Wirtanen]], as well as eight [[asteroid]]s, including notably the [[Apollo asteroid|Apollo]] asteroid [[(29075) 1950 DA]], which may have a non-negligible probability of impacting the Earth in the year 2880. He also discovered two other Apollo asteroids: [[1685 Toro]] and [[1863 Antinous]]. Based on the ''Shane–Wirtanen survey'', the Shane Wirtanen Catalogue, a count of galaxies, was his major work published in 1954.<ref name="Brown-1989" />
==References==

{{Reflist}}
Wirtanen was of Finnish ancestry.<ref name="Obituary-by-Klemola" />

The asteroid [[2044 Wirt]], discovered by himself at Lick Observatory in 1950, was named in his honor in on 1 January 1981 ({{small|[[Minor Planet Circulars|M.P.C.]] 5688}}). The name was proposed by his college [[Arnold Richard Klemola|Arnold Klemola]].<ref name="springer" /><ref name="MPC-Circulars-Archive" />

== References ==
{{reflist
|refs=

<ref name="MPC-Discoverers">{{cite web
|title = Minor Planet Discoverers (by number)
|work = Minor Planet Center
|url = http://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html
|date = 23 May 2016
|accessdate = June 2016}}</ref>

<ref name="Obituary-by-Klemola">{{Cite journal
|author = Klemola, Arnold Richard
|date = September 1991
|title = Obituary: Carl Alvar Wirtanen, 1910-1990
|url = http://articles.adsabs.harvard.edu/full/seri/BAAS./0023//0001495.000.html
|journal = Bulletin of the American Astronomical Society ; vol. 23
|pages = 1495–1496
|bibcode = 1991BAAS...23.1495K
|access-date= July 2016}}</ref>

<ref name="springer">{{cite book
|title = Dictionary of Minor Planet Names – (2044) Wirt
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 166
|date = 2007
|url = http://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_2045
|isbn = 978-3-540-00238-3
|accessdate = July 2016}}</ref>

<ref name="Brown-1989">{{Cite journal
|first1 = Michael E. |last1 = Brown
|first2 = Edward J. |last2 = Groth
|date = March 1989
|title = The Shane Wirtanen counts – Observability of the galaxy correlation function
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1989ApJ...338..605B
|journal = Astrophysical Journal
|pages = 605–617
|issn = 0004-637X
|bibcode = 1989ApJ...338..605B
|doi = 10.1086/167222
|access-date= July 2016}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = July 2016}}</ref>

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


{{DEFAULTSORT:Wirtanen, Carl}}
{{DEFAULTSORT:Wirtanen, Carl}}
[[Category:1910 births]]
[[Category:1910 births]]
[[Category:1990 deaths]]
[[Category:1990 deaths]]
[[Category:People from Kenosha, Wisconsin]]
[[Category:American people of Finnish descent]]
[[Category:20th-century astronomers]]
[[Category:20th-century astronomers]]
[[Category:20th-century American scientists]]
[[Category:American astronomers]]
[[Category:American astronomers]]
[[Category:American people of Finnish descent]]
[[Category:Discoverers of asteroids]]
[[Category:Discoverers of asteroids]]
[[Category:Discoverers of comets]]
[[Category:Discoverers of comets]]
[[Category:Discoveries by Carl A. Wirtanen|*]]
[[Category:Lick Observatory]]
[[Category:Lick Observatory]]
[[Category:People from Kenosha, Wisconsin]]
[[Category:University of Virginia alumni]]
[[Category:University of Virginia alumni]]
[[Category:20th-century American scientists]]





Revision as of 11:41, 12 July 2016

Minor planets discovered: 8 [1]
1600 Vyssotsky October 22, 1947
1685 Toro July 17, 1948
1747 Wright July 14, 1947
1863 Antinous March 7, 1948
1951 Lick July 26, 1949
2044 Wirt November 8, 1950
6107 Osterbrock January 14, 1948
(29075) 1950 DA February 22, 1950

Carl Alvar Wirtanen (November 11, 1910, Kenosha, Wisconsin – March 7, 1990 Santa Cruz, California) was an American astronomer and discoverer of comets and minor planets who worked at Lick Observatory.[2][3]

He discovered periodic comet 46P/Wirtanen, as well as eight asteroids, including notably the Apollo asteroid (29075) 1950 DA, which may have a non-negligible probability of impacting the Earth in the year 2880. He also discovered two other Apollo asteroids: 1685 Toro and 1863 Antinous. Based on the Shane–Wirtanen survey, the Shane Wirtanen Catalogue, a count of galaxies, was his major work published in 1954.[4]

Wirtanen was of Finnish ancestry.[2]

The asteroid 2044 Wirt, discovered by himself at Lick Observatory in 1950, was named in his honor in on 1 January 1981 (M.P.C. 5688). The name was proposed by his college Arnold Klemola.[3][5]

References

  1. ^ "Minor Planet Discoverers (by number)". Minor Planet Center. 23 May 2016. Retrieved June 2016. {{cite web}}: Check date values in: |accessdate= (help)
  2. ^ a b Klemola, Arnold Richard (September 1991). "Obituary: Carl Alvar Wirtanen, 1910-1990". Bulletin of the American Astronomical Society ; vol. 23: 1495–1496. Bibcode:1991BAAS...23.1495K. Retrieved July 2016. {{cite journal}}: Check date values in: |access-date= (help)
  3. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2044) Wirt. Springer Berlin Heidelberg. p. 166. ISBN 978-3-540-00238-3. Retrieved July 2016. {{cite book}}: Check date values in: |accessdate= (help)
  4. ^ Brown, Michael E.; Groth, Edward J. (March 1989). "The Shane Wirtanen counts – Observability of the galaxy correlation function". Astrophysical Journal: 605–617. Bibcode:1989ApJ...338..605B. doi:10.1086/167222. ISSN 0004-637X. Retrieved July 2016. {{cite journal}}: Check date values in: |access-date= (help)
  5. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved July 2016. {{cite web}}: Check date values in: |accessdate= (help)