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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.[5] The outward migration of perihelion created impressive meteor showers in 1916, 1921, and 1927.[6]

7P/Pons–Winnecke
Artists Concept 1921 Pons–Winnecke.jpg
Contemporary 1921 illustration of Pons–Winnecke comet.
Discovery
Discovered byJean Louis Pons &
Friedrich Winnecke
Discovery dateJune 12, 1819 &
March 9, 1858
Alternative
designations
1858 E1, 1858 II, 1819 III,
1927c, 1933b, 1939c,
1945a, 1951c, 1964b,
1970b, 1976f, 1983b,
1989g
Orbital characteristics A
EpochMay 6, 2002
Aphelion5.611 AU
Perihelion1.257 AU
Semi-major axis3.434 AU
Eccentricity0.634
Orbital period6.37 a
Inclination22.28°
Dimensions5.2 km[4]
Last perihelionJanuary 30, 2015[1][2]
September 26, 2008
Next perihelion2021-May-27[3]
Perihelion distance
at different epochs
[3]
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

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.[7]

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;[8] but it will not come as close in the 21st century. A close approach to Jupiter in July 2037[8] will drop perihelion back to 0.982 AU.

The comet nucleus is estimated at about 5.2 km in diameter.[4]

ReferencesEdit

  1. ^ a b Seiichi Yoshida (2013-12-14). "7P/Pons-Winnecke". Seiichi Yoshida's Comet Catalog. Retrieved 2014-10-29.
  2. ^ Patrick Rocher (2008-12-23). "Note number : 0039 P/Pons-Winnecke : 7P". Institut de mécanique céleste et de calcul des éphémérides. Retrieved 2012-02-19.
  3. ^ a b "7P/Pons-Winnecke". Minor Planet Center. Retrieved 2019-03-05.
  4. ^ a b "JPL Small-Body Database Browser: 7P/Pons-Winnecke" (last observation:2014-03-28). Jet Propulsion Laboratory. Retrieved 2010-02-25.
  5. ^ http://cometography.com/nearcomet.html
  6. ^ Kronk, Gary W. "7P/Pons-Winnecker". Retrieved 2019-03-05. (Cometography Home Page)
  7. ^ "Elements and Ephemeris for 7P/Pons-Winnecke". Minor Planet Center. Archived from the original on 2014-10-29. Retrieved 2014-10-29. (0007P)
  8. ^ a b "JPL Close-Approach Data: 7P/Pons-Winnecke" (last observation: 2014-03-28). Retrieved 2008-03-22.

External linksEdit

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