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Updated on January 4, 2023


* Profile

It comes close to the Sun at the perihelion passage, with a distance of 0.5-0.6 A.U. But the brightening and fading is rapid even around the perihelion passage.

The light curve is strongly asymmetric to the perihelion passage. Before the perihelion passage, the brightness evolution is extremely rapid along a 30 log r formula, and the comet becomes bright in a short time. After the perihelion passage, the fading is along a 15 log r formula, somewhat slower than the brightening.

Kazuo Kinoshita's calculation revealed that it passes near by Earth and Jupiter frequently, but the shape of the orbit does not change so much.

Kazuo Kinoshita's calculation revealed that it will pass only within 0.1 A.U. from the Earth in 2011 August and 2017 February. The approaches will happen about 1 month and a half after the perihelion passage. So the comet will be diffuse but very bright.

* Returns and Appearances

!Discovered *Appeared -Not observed #Appeared before discovery +Not observed before discovery .Returns in the future
2027 Aug. 31
* 45P
2022 Apr. 26
* 45P
2016 Dec. 31
* 45P
2011 Sept. 28
* 45P
2006 June 29
* 45P
2001 Mar. 29
* 45P
1995 Dec. 25
* 45P
1990 Sept.12
* 45P
1985 May 23
* 45P
1980 Apr. 11
* 45P
1974 Dec. 28
* 45P
1969 Sept.22
* 45P
1964 July 6
1959 Apr. 22
* 45P/1954 C1
1954 Feb. 5
! 45P/1948 X1
1948 Nov. 17


The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996.
The perihelion date in 1959 is calculated using the Minor Planet & Comet Ephemeris Service.
Information on the discovery and historical highlights are available at General Comet Info (Gary W. Kronk).
Orbital elements in the past and future are calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmtn/0045p.htm).


Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.