Editing Clyde Tombaugh (section)

===Asteroids===
[[File:Lowell blink comparator.jpg|thumb|Tombaugh compared his photographic plates using this blink comparator.]]
Tombaugh is officially credited by the Minor Planet Center with discovering 15 asteroids, and he observed nearly 800 [[asteroid]]s<ref name = "asteroids">{{Cite encyclopedia|last=Darling|first=David|author-link=David Darling (astronomer)|title=Tombaugh, Clyde William (1906–1997)|url=http://www.daviddarling.info/encyclopedia/ETEmain.html|encyclopedia=The Internet Encyclopedia of Science|access-date=April 25, 2010|archive-date=July 17, 2017|archive-url=https://web.archive.org/web/20170717012700/http://www.daviddarling.info/encyclopedia/ETEmain.html|url-status=live}}</ref> during his search for Pluto and years of follow-up searches looking for another candidate for the postulated Planet X. Tombaugh is also credited with the discovery of periodic comet 274P/Tombaugh–Tenagra.<ref name=Levy2003>{{cite book|first=David|last=Levy|date=2003|title=David Levy's Guide to Observing and Discovering Comets|publisher=Cambridge University Press|url=https://books.google.com/books?id=2AzBYCYV9ucC&q=Tombaugh+comet&pg=PA79|isbn=978-0521520515|access-date=December 9, 2020|archive-date=May 19, 2024|archive-url=https://web.archive.org/web/20240519235618/https://books.google.com/books?id=2AzBYCYV9ucC&q=Tombaugh+comet&pg=PA79#v=snippet&q=Tombaugh%20comet&f=false|url-status=live}}</ref> He also discovered hundreds of [[variable star]]s, as well as [[star cluster]]s, [[galaxy cluster]]s, and a galaxy [[supercluster]].<ref name="Academy"/>
{| class="wikitable"
|+ Minor planets discovered by Tombaugh
|-
!scope="col"| Designation
!scope="col"| Discovery
|-
!scope="row"| [[2839 Annette]]
| October 5, 1929
|-
!scope="row"| [[2941 Alden]]
| December 24, 1930
|-
!scope="row"| [[3310 Patsy]]
| October 9, 1931
|-
!scope="row"| [[3583 Burdett]]
| October 5, 1929
|-
!scope="row"| [[3754 Kathleen]]
| March 16, 1931
|-
!scope="row"| [[3775 Ellenbeth]]
| October 6, 1931
|-
!scope="row"| [[3824 Brendalee]]
| October 5, 1929
|-
!scope="row"| [[4510 Shawna]]
| December 13, 1930
|-
!scope="row"| [[4755 Nicky]]
| October 6, 1931
|-
!scope="row"| [[5701 Baltuck]]
| November 3, 1929
|-
!scope="row"| [[6618 Jimsimons]]
| September 16, 1936
|-
!scope="row"| [[7101 Haritina]]
| October 17, 1930
|-
!scope="row"| [[7150 McKellar]]
| October 11, 1929
|-
!scope="row"| {{mpl|(8778) 1931 TD|3}}
| October 10, 1931
|-
!scope="row"| [[134340 Pluto]]
| January 23, 1930
|}

The [[asteroid]] [[1604 Tombaugh]],<ref>{{cite web|title=(1604) Tombaugh|publisher=Asteroid Dynamic Site|url=https://newton.spacedys.com/astdys/index.php?pc=1.1.0&n=1604 |access-date=February 28, 2007|url-status=live |archive-url=https://web.archive.org/web/20060223122659/http://hamilton.dm.unipi.it/cgi-bin/astdys/astibo?objects%3ATombaugh%3Bmain|archive-date=February 23, 2006}}</ref> discovered in 1931, is named after him. He discovered hundreds of asteroids, beginning with 2839 Annette in 1929, mostly as a by-product of his search for Pluto and his searches for other celestial objects.<ref name="Academy"/> Tombaugh named some of them after his wife, children and grandchildren. The [[Royal Astronomical Society]] awarded him the [[Jackson-Gwilt Medal]] in 1931.<ref>{{cite web|title=Jackson-Gwilt Medal Winners|url=https://www.ras.org.uk/awards-and-grants/awards/2275-jackson-gwilt-medal|website=RAS website|publisher=[[Royal Astronomical Society]]|access-date=July 14, 2015|format=PDF|archive-date=August 5, 2020|archive-url=https://web.archive.org/web/20200805174452/https://ras.ac.uk/|url-status=live}}</ref>