| 词条 | 31P/Schwassmann–Wachmann |
| 释义 |
| name=31P/Schwassmann–Wachmann | image= | discoverer= Arnold Schwassmann Arno Arthur Wachmann | discovery_date=January 17, 1929 | designations=1929 I; 1935 III; 1942 I; 1948 VII; 1955 I; 1961 VII; 1968 II; 1974 XIII; 1981 VI; 1987 XIX; 1994 II | epoch=March 6, 2006 | semimajor=4.232 AU | perihelion=3.416 AU | aphelion=5.048 AU | eccentricity=0.1928 | period=8.705 a | inclination= 4.5487° | last_p=September 29, 2010[1] January 18, 2002[1] | next_p=2019-Jul-06[2] }} 31P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 2, is a periodic comet in the Solar System. It was discovered on January 17, 1929, at an apparent magnitude of 11.[3] The comet has been seen at every apparition. The comet nucleus is estimated to be 6.2 kilometers in diameter.[4] In 1929, the astronomer Anne Sewell Young identified the comet with an object that had been misidentified as the minor planet "Adelaide" (A904 EB).[5] References1. ^1 {{cite web |date=2008-10-26 |title=31P/Schwassmann-Wachmann 2 |publisher=Seiichi Yoshida's Comet Catalog |author=Seiichi Yoshida |url=http://www.aerith.net/comet/catalog/0031P/index.html |accessdate=2010-01-24}} 2. ^{{cite web |date=2011-06-13 |title=Note number : 0016 P/Schwassmann-Wachmann 2 : 31P |publisher=Institut de mécanique céleste et de calcul des éphémérides |author=Patrick Rocher |url=http://www.imcce.fr/en/ephemerides/donnees/comets/FICH/CIF0016.php |accessdate=2012-02-18}} 3. ^{{cite web |first=Gary W |last=Kronk |title=31P/Schwassmann–Wachmann 2 |url=http://cometography.com/pcomets/031p.html |accessdate=2010-01-24}} (Cometography Home Page) 4. ^{{cite web |type=2010-01-21 last obs |title=JPL Small-Body Database Browser: 31P/Schwassmann–Wachmann 2 |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=31P |publisher=Jet Propulsion Laboratory |accessdate=2010-02-26}} 5. ^{{cite news|title=Long 'Lost' Planet Found Masquerading as Comet|url=https://www.newspapers.com/clip/14987519/anne_sewell_young_18711961/|newspaper=Oakland Tribune|date=June 21, 1929|page=31|via = Newspapers.com|accessdate = November 9, 2017}} {{Open access}} External links
3 : Periodic comets|Discoveries by Friedrich Karl Arnold Schwassmann|Astronomical objects discovered in 1929 |
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