7P/Pons–Winnecke
| Discovery | |
|---|---|
| Discovered by | 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 | |
| Orbital characteristics | |
| Epoch | May 6, 2002 |
| Aphelion | 5.611 AU |
| Perihelion | 1.257 AU |
| Semi-major axis | 3.434 AU |
| Eccentricity | 0.634 |
| Orbital period | 6.37 a |
| Inclination | 22.28° |
| Last perihelion | September 26, 2008 |
| Next perihelion | January 30, 2015[1][2] |
7P/Pons–Winnecke (also known as Comet Pons–Winnecke) is a periodic Jupiter-family comet in the solar system.
The comet next comes to perihelion (closest approach to the Sun) on March 2, 2015,[1] but at perihelion passage it will have a solar elongation of 24 degrees.[3]
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;[4] but it will not come as close in the 21st century.
The comet nucleus is estimated at about 5.2 km in diameter.[5]
References
- ^ a b Seiichi Yoshida (2013-12-14). "7P/Pons-Winnecke". Seiichi Yoshida's Comet Catalog. Retrieved 2014-10-29.
- ^ Patrick Rocher (2008-12-23). "Note number : 0039 P/Pons-Winnecke : 7P". Institut de mecanique celeste et de calcul des ephemerides. Retrieved 2012-02-19.
- ^ "Elements and Ephemeris for 7P/Pons-Winnecke". Minor Planet Center. Retrieved 2014-10-29. (0007P)
- ^ "JPL Close-Approach Data: 7P/Pons-Winnecke" (last observation: 2014-03-28). Retrieved 2008-03-22.
- ^ "JPL Small-Body Database Browser: 7P/Pons-Winnecke" (last observation:2014-03-28). Jet Propulsion Laboratory. Retrieved 2010-02-25.
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- Elements and Ephemeris for 7P/Pons-Winnecke – Minor Planet Center
- 7P/Pons-Winnecke – Seiichi Yoshida @ aerith.net
- 7P – Gary W. Kronk's Cometography
- article on the nuclei of 7P, 14P, and 92P
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