Comet hunter Tsutomu Seki's web-page[Top]

• What's New.

• My Diary.
• Reports from Geisei Observatory.
• A list of comets discovered by Tsutomu Seki.
• A list of minor planets discovered by Tsutomu Seki.
• Monthly Astrophoto Gallery.
• Memorable Comets.
• When Comets Shine.

• Biography.
• Telescopes of Geisei Observatory.

• Astronomy Links

• From the Translator

Japanese page is here >>

Last update: 31-August-2011

Click for a larger image

213P/Van Ness Components A and B
Composite of 16 10-minute exposures
0:37-3:27, August 7, 2011
Copyright (C) 2011 Geisei Observatory

This is Comet Van Ness. It was discovered on July 30 by Ishigakijima Astronomical Observatory (NAOJ) to have been split into two fragments. Geisei Observatory has also captured it. This image was made by 3-hour continuous exposure making the best use of the observatory's facilities.

The Discovery story of Comet Seki-Lines

[My book "Seeking Unknown Stars" in 1993.]

Comet Seki-Lines (1962 C1) was discovered on February 4, 1962, my second comet discovery. This is my account of the moment of discovery, anxiety before and after reporting the discovery, and a sense of relief and achievement after the confirmation.
(The story was previously published in my book "Seeking Unknown Stars" in 1993.)

The Story of a Comet Hunter's Life

Part 11 Updated now!!

11-March-2008

Tsutomu Seki and the Great Comet of 1965
- The year 2005 marks the 40th anniversary
of a great sungrazing comet -
Sky & Telescope, January 2006

• Production and copyright:
Tsutomu Seki
e-mail:

• English language translation:
Eiji Kato
e-mail:

• Technical staff and web designer:
Shigeo Shimomoto
e-mail:

You can add this site to your links without contacting us.
Here are our suggested banners for linking to this site: