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{{Infobox Comet
| name=7P/Pons–Winnecke
| image=Artists Concept 1921 Pons–Winnecke.jpg
| caption=Contemporary 1921 illustration of Pons–Winnecke comet.
| discoverer=Jean Louis Pons &
Friedrich Winnecke
| discovery_date=June 12, 1819 &
March 9, 1858
| designations=1858 E1, 1858 II, 1819 III,
1927c, 1933b, 1939c,
1945a, 1951c, 1964b,
1970b, 1976f, 1983b,
1989g
| epoch=May 6, 2002
| semimajor=3.434 AU
| perihelion=1.257 AU
| aphelion=5.611 AU
| eccentricity=0.634
| period=6.37 a
| inclination= 22.28°
| last_p=January 30, 2015[1][2]
September 26, 2008
| next_p=2021-May-27
| dimensions=5.2 km[4]
}}Perihelion distance
at different epochs | | Epoch | Perihelion
(AU) |
|---|
| 1819 | 0.77 | | 1875 | 0.83 | | 1886 | 0.89 | | 1898 | 0.92 | | 1909 | 0.97 | | 1921 | 1.04 | | 1933 | 1.10 | | 1945 | 1.16 |
7P/Pons–Winnecke (also known as Comet Pons–Winnecke) is a periodic Jupiter-family comet in the solar system. It made a very close approach to Earth in June 1927.[1] The outward migration of perihelion created impressive meteor showers in 1916, 1921, and 1927.[7]The comet most recently came to perihelion (closest approach to the Sun) on January 30, 2015,[1] and at perihelion passage it had a solar elongation of 24 degrees.[9] Jean Louis Pons (Marseille) originally discovered the comet on June 12, 1819, it was later rediscovered by Friedrich August Theodor Winnecke (Bonn) on March 9, 1858. It is believed to be the parent body of the June Bootids of late June. 7P has an orbital period of 6.37 years. It has a perihelion of 1.3 AU and an aphelion of 5.6 AU (past the orbit of Jupiter). It passed within 6 million km (0.04 AU) of Earth in June 1927, and 16 million km (0.1 AU) in 1939;[10] but it will not come as close in the 21st century. A close approach to Jupiter in July 2037[10] will drop perihelion back to 0.982 AU. The comet nucleus is estimated at about 5.2 km in diameter.[4] References 1. ^http://cometography.com/nearcomet.html
2. ^1 2 {{cite web |date=2013-12-14 |title=7P/Pons-Winnecke |publisher=Seiichi Yoshida's Comet Catalog |author=Seiichi Yoshida |url=http://www.aerith.net/comet/catalog/0007P/index.html |accessdate=2014-10-29}}
3. ^1 {{Cite web |first=Gary W. |last=Kronk |authorlink=Gary W. Kronk |title=7P/Pons-Winnecker |url=http://cometography.com/pcomets/007p.html |accessdate=2019-03-05}} (Cometography Home Page)
4. ^1 {{cite web |title = Elements and Ephemeris for 7P/Pons-Winnecke |publisher = Minor Planet Center |url = http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0007P |accessdate = 2014-10-29 |deadurl = yes |archiveurl = https://web.archive.org/web/20141029160327/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0007P |archivedate = 2014-10-29 |df = }} (0007P)
5. ^1 {{cite web |date=2008-12-23 |title=Note number : 0039 P/Pons-Winnecke : 7P |publisher=Institut de mécanique céleste et de calcul des éphémérides |author=Patrick Rocher |url=http://www.imcce.fr/en/ephemerides/donnees/comets/FICH/CIF0039.php |accessdate=2012-02-19}}
6. ^1 2 {{cite web |type=last observation:2014-03-28 |title=JPL Small-Body Database Browser: 7P/Pons-Winnecke |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=7P |publisher=Jet Propulsion Laboratory |accessdate=2010-02-25}}
7. ^1 2 {{cite web |type=last observation: 2014-03-28 |title=JPL Close-Approach Data: 7P/Pons-Winnecke |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=7P;cad=1#cad |accessdate=2008-03-22}}
}} External links - Orbital simulation from JPL (Java) / Horizons Ephemeris
- [https://web.archive.org/web/20141029160327/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0007P Elements and Ephemeris for 7P/Pons-Winnecke] – Minor Planet Center
- 7P/Pons-Winnecke – Seiichi Yoshida @ aerith.net
- 7P – Gary W. Kronk's Cometography
- [https://arxiv.org/abs/astro-ph/0509115v1 article on the nuclei of 7P, 14P, and 92P]
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