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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°
Last perihelion September 26, 2008
Next perihelion January 30, 2015[1]

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

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

The comet nucleus is estimated at about 5.2 km in diameter.[3]


  1. ^ 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. 
  2. ^ "JPL Close-Approach Data: 7P/Pons-Winnecke". 2008-10-19 last obs. Retrieved 2008-03-22.  Check date values in: |date= (help)
  3. ^ "JPL Small-Body Database Browser: 7P/Pons-Winnecke". Jet Propulsion Laboratory. 2008-10-19 last obs. Retrieved 2010-02-25.  Check date values in: |date= (help)

External links[edit]

Periodic comets (by number)
7P/Pons–Winnecke Next