7P/Pons–Winnecke (also known as Comet Pons–Winnecke) is a periodicJupiter-familycomet with a six-year orbit. Early calculations for the 1921 apparition suggested that the orbit of the comet might collide with Earth in June, but observations on 10 April ruled out an impact.[1] It made a very close approach to Earth in June 1927.[7] The outward migration of perihelion created impressive meteor showers in 1916, 1921 and 1927.[8]
7P/Pons–Winnecke
Contemporary 1921 illustration of Pons–Winnecke comet[1]
The next perihelion passage is 25 August 2027[4] when the comet will have a solar elongation of 63 degrees. The last perihelion passage was 27 May 2021 when the comet had a solar elongation of 107 degrees at approximately apparent magnitude 11.[3] It passed 0.44 AU (66 million km) from Earth on 12 June 2021. Before that it came to perihelion on 30 January 2015[3] with a solar elongation of 24 degrees.[9]
7P has an orbital period of 6.3 years. It currently has a perihelion of 1.2 AU (outside the orbit of Earth) and an aphelion of 5.6 AU (past the orbit of Jupiter). It passed within 0.04 AU (6.0 million km; 16 LD) of Earth in June 1927, and 0.1 AU (15 million km) in 1939;[6] but it will not come as close in the 21st century. A close approach to Jupiter in July 2037[6] will drop perihelion to 0.982 AU, and by 2062 perihelion will be further reduced to 0.85 AU.[5]
7P/Pons–Winnecke closest Earth approach on 2062-Jun-12[6]
The Jet Propulsion Laboratory proposed a flyby of the comet with a flight spare of Mariner 4 with the closest approach taking place in 1969.[10] The probe was instead used for a Venus flyby as Mariner 5.[10]
^ ab"Horizons Batch for 7P/Pons-Winnecke (90000167) on 2027-Aug-25" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2022-06-15. (JPL#24/Soln.date: 2021-Dec-20)
^ abcKinoshita, Kazuo (2016-07-31). "7P/Pons-Winnecke past, present and future orbital elements". Comet Orbit. from the original on 2011-05-20. Retrieved 2023-07-27.
^ abcde"JPL Small-Body Database Browser: 7P/Pons-Winnecke" (last observation:2014-03-28). Jet Propulsion Laboratory. Archived from the original on 2012-12-13. Retrieved 2010-02-25.
^Kronk, Gary W. "7P/Pons-Winnecker". Retrieved 2019-03-05. (Cometography Home Page)
^. Minor Planet Center. Archived from the original on 2014-10-29. Retrieved 2014-10-29. (0007P)
^ abUlivi, Paolo; Harland, David M (2007). Robotic Exploration of the Solar System Part I: The Golden Age 1957-1982. Springer. pp. 57–58. ISBN9780387493268.
External linksedit
Orbital simulation from JPL (Java) / Horizons Ephemeris
pons, winnecke, also, known, comet, pons, winnecke, periodic, jupiter, family, comet, with, year, orbit, early, calculations, 1921, apparition, suggested, that, orbit, comet, might, collide, with, earth, june, observations, april, ruled, impact, made, very, cl. 7P Pons Winnecke also known as Comet Pons Winnecke is a periodic Jupiter family comet with a six year orbit Early calculations for the 1921 apparition suggested that the orbit of the comet might collide with Earth in June but observations on 10 April ruled out an impact 1 It made a very close approach to Earth in June 1927 7 The outward migration of perihelion created impressive meteor showers in 1916 1921 and 1927 8 7P Pons WinneckeContemporary 1921 illustration of Pons Winnecke comet 1 DiscoveryDiscovered byJean Louis Pons amp Friedrich WinneckeDiscovery dateJune 12 1819 amp March 9 1858DesignationsAlternative designations1858 E1 1858 II 1819 III 1927c 1933b 1939c 1945a 1951c 1964b 1970b 1976f 1983b 1989gOrbital characteristicsEpoch2023 02 25 2 Aphelion5 59 AUPerihelion1 233 AUSemi major axis3 41 AUEccentricity0 6385Orbital period6 30 yrsInclination22 373 Last perihelionMay 27 2021 2 January 30 2015 3 September 26 2008Next perihelion2027 Aug 25 4 5 Earth MOID0 24 AU 36 million km Physical characteristicsDimensions5 2 km 6 Perihelion distanceat different epochs 5 Epoch Perihelion AU 1819 0 771875 0 831886 0 891898 0 921909 0 971921 1 041933 1 101989 1 262027 1 132039 0 9822062 0 847The next perihelion passage is 25 August 2027 4 when the comet will have a solar elongation of 63 degrees The last perihelion passage was 27 May 2021 when the comet had a solar elongation of 107 degrees at approximately apparent magnitude 11 3 It passed 0 44 AU 66 million km from Earth on 12 June 2021 Before that it came to perihelion on 30 January 2015 3 with a solar elongation of 24 degrees 9 Jean Louis Pons Marseille originally discovered the comet on 12 June 1819 it was later rediscovered by Friedrich August Theodor Winnecke Bonn on 9 March 1858 It is the parent body of the June Bootids of late June 7P has an orbital period of 6 3 years It currently has a perihelion of 1 2 AU outside the orbit of Earth and an aphelion of 5 6 AU past the orbit of Jupiter It passed within 0 04 AU 6 0 million km 16 LD of Earth in June 1927 and 0 1 AU 15 million km in 1939 6 but it will not come as close in the 21st century A close approach to Jupiter in July 2037 6 will drop perihelion to 0 982 AU and by 2062 perihelion will be further reduced to 0 85 AU 5 7P Pons Winnecke closest Earth approach on 2062 Jun 12 6 Date amp time ofclosest approach Earth distance AU Sun distance AU Velocitywrt Earth km s Velocitywrt Sun km s Uncertaintyregion 3 sigma Reference2062 Jun 12 18 25 10 min 0 1676 AU 25 07 million km 15 58 million mi 65 2 LD 0 8499 AU 127 14 million km 79 00 million mi 330 8 LD 16 3 42 5 312 km HorizonsThe comet nucleus is estimated at about 5 2 km in diameter 6 Proposed exploration editThe Jet Propulsion Laboratory proposed a flyby of the comet with a flight spare of Mariner 4 with the closest approach taking place in 1969 10 The probe was instead used for a Venus flyby as Mariner 5 10 References edit a b Popular Science July 1921 a b 7P Pons Winnecke Minor Planet Center Retrieved 2019 03 05 a b c Seiichi Yoshida 2013 12 14 7P Pons Winnecke Seiichi Yoshida s Comet Catalog Retrieved 2014 10 29 a b Horizons Batch for 7P Pons Winnecke 90000167 on 2027 Aug 25 Perihelion occurs when rdot flips from negative to positive JPL Horizons Retrieved 2022 06 15 JPL 24 Soln date 2021 Dec 20 a b c Kinoshita Kazuo 2016 07 31 7P Pons Winnecke past present and future orbital elements Comet Orbit Archived from the original on 2011 05 20 Retrieved 2023 07 27 a b c d e JPL Small Body Database Browser 7P Pons Winnecke last observation 2014 03 28 Jet Propulsion Laboratory Archived from the original on 2012 12 13 Retrieved 2010 02 25 Record Close Comet Distances from Earth Kronk Gary W 7P Pons Winnecker Retrieved 2019 03 05 Cometography Home Page Elements and Ephemeris for 7P Pons Winnecke Minor Planet Center Archived from the original on 2014 10 29 Retrieved 2014 10 29 0007P a b Ulivi Paolo Harland David M 2007 Robotic Exploration of the Solar System Part I The Golden Age 1957 1982 Springer pp 57 58 ISBN 9780387493268 External links editOrbital 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 Numbered cometsPrevious6P d Arrest 7P Pons Winnecke Next8P Tuttle Retrieved from https en wikipedia org w index php title 7P Pons Winnecke amp oldid 1191614045, wikipedia, wiki, book, books, library,
