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Updated on March 12, 2017


* Profile

New periodic comet discovered in 1999. But in the next return in 2008, it became fainter by 2 mag.

Kazuo Kinoshita's calculation revealed that the perihelion distance has been almost constant at 3.6 - 3.7 A.U. since 1952. Therefore, the brightness of the comet should be also stable.

In the apparition in 1999, the comet was not observed in 2000, one year after the discovery, although it must have been almost as bright as at the discovery. It suggests that the comet was temporarily bright in outburst in 1999.

* Returns and Appearances

!Discovered *Appeared -Not observed #Appeared before discovery +Not observed before discovery .Returns in the future
* 187P
2018 May 26
* 187P/2007 E3
2008 Oct. 6
! 187P/1999 J5
1999 May 12


Orbital elements in the past and future are calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmt/j99j5.htm).


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