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Artists Concept 1921 Pons–Winnecke.jpg
Contemporary 1921 illustration of Pons–Winnecke comet.
Discovered by Jean Louis Pons &
Friedrich Winnecke
Discovery date June 12, 1819 &
March 9, 1858
1858 E1, 1858 II, 1819 III,
1927c, 1933b, 1939c,
1945a, 1951c, 1964b,
1970b, 1976f, 1983b,
Orbital characteristics A
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°
Dimensions 5.2 km[4]
Last perihelion January 30, 2015[1][2]
September 26, 2008
Next perihelion 2021-May-27[3]

7P/Pons–Winnecke (also known as Comet Pons–Winnecke) is a periodic Jupiter-family comet in the solar system.

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.[5]

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;[6] but it will not come as close in the 21st century.

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


  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. ^ MPC
  4. ^ a b "JPL Small-Body Database Browser: 7P/Pons-Winnecke" (last observation:2014-03-28). Jet Propulsion Laboratory. Retrieved 2010-02-25. 
  5. ^ "Elements and Ephemeris for 7P/Pons-Winnecke". Minor Planet Center. Archived from the original on 2014-10-29. Retrieved 2014-10-29.  (0007P)
  6. ^ "JPL Close-Approach Data: 7P/Pons-Winnecke" (last observation: 2014-03-28). Retrieved 2008-03-22. 

External links[edit]

Numbered comets
7P/Pons–Winnecke Next