161P/Hartley-IRAS

Japanese version
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Updated on July 16, 2006

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* Profile

The light curve is strongly asymmetric to the perihelion. The brightening and fading is rapid, and it becomes brightest after the perihelion passage.

The light curve was very strange in 1984. It brightened after the perihelion passage by 3 mag. It was probably an unusual outburst.

In 2005, the brightness at the perihelion passage was similar to the brightness in 1984. But after that, it kept the same brightness for a while, then it faded very rapidly.

* Returns and Appearances

!Discovered *Appeared -Not observed #Appeared before discovery +Not observed before discovery .Returns in the future
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2026 Nov. 27
* 161P/2004 V2
2005 June 20
! 161P/1983 V1
1984 Jan. 8

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Information on the discovery and historical highlights are available at General Comet Info (Gary W. Kronk).
The past and future orbital elements calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmtn/0161p.htm).

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