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  Summary: Comet 17P/Holmes shocked astronomers on Oct. 24, 2007, with a spectacular eruption. In less than 24 hours, the 17th magnitude comet brightened by a factor of nearly a million, becoming a naked-eye object in the evening sky. By mid-November the expanding comet was the largest object in the solar system--bigger even than the Sun. Since then, the comet has faded back to invisibility. A leading model of the blast posits a deep cavern of ice changing phase, from amorphous to crystalline, releasing in transition enough heat to cause Holmes to blow its top. The comet probably contains many such caverns so, one day, it could happen again. [ephemeris] [3D orbit]
 
  Photographer, Location Images Comments


Martin Wagner,
72820 Sonnenbuehl, Germany
Nov. 19, 2007		 #1, more

Here is Comet Holmes, 9x30s at 1600 ASA, 150mm Newton, f=750mm on 19.11.2007 at 1:30.


Farzad Zamanfar & Babak Tafreshi,
Polur, slopes of Mount Damavand, Iran
Nov. 18, 2007		 #1, #2, more

Comet Holmes meets bright star Mirfak. A wide view, show the comet as a ghostly dot very close to Mirfak. The landscape is slopes of huge volcano, Mount Damavand, nearly 5700- meter high mountain. The telescopic view is taken through a 10-inch SCT.


Carlos Reis,
Garcia Marinha Grande, Portugal
Nov. 18, 2007		 #1, more

Comet 17p/Holmes near Mirfak 11-18-2007 04.00 T.U Canon 350D 2X960s ISO 1600 Telescope : Orion 80ED Filter : Deep Sky


Lorenzo Comolli,
Tradate, VA, Italy
Nov. 2, 2007		 #1, more

A wide field view of the sky with autumnal constellations, and 17P/Holmes with a fireball. Canon 350D, 8mm f3.5, 200 ISO, exp 60s, 2 Nov 2007, 23.21 UT. Tradate, VA, Italy.

Laurence Harry,
Nanaimo BC Canada
Nov. 18, 2007		 #1

The Comet was very close to Mirfak and I was able to get this photo just before the clouds rolled in.Canon 20D,20 sec exposure,f/2, prime focus Konus 8" Newtonian, EQ 6 goto mount.


Peter von Bagh,
Porvoo, Finland
Nov. 16, 2007		 #1, #2, #3

It was possible to take pictures of the comet even near an illuminated church in Porvoo, Finland.


André Müller,
Aachen, Germany
Nov. 18, 2007		 #1, more

After three weeks of rain we had another chance of seeing the cosmic jellyfish. In comparison to the view at the end of oktober there had been some impressive developments in the comet. Very Amazing!


John Stetson,
Falmouth, Maine
Nov. 17, 2007		 #1

From the 11th of November to the 17th, Comet Holmes has become larger, more diffuse, fainter, and more stars are visible through it (especially in the cluster of stars near Mirfak).


Dennis Mammana,
Borrego Springs, California, USA
Nov. 17, 2007		 #1, more

After photographing Comet Holmes every night for 2+ weeks I thought it was time for something different! Here's Holmes with an artsy "flare", provided by some dramatic and colorful diffraction spikes, courtesy of Noel Carboni's "Astronomy Tools" actions set for PhotoShop. Canon 20D, Tamron 28-300 zoom at 300mm, f/9, ISO 800, 4-minute exposure.


Philippe Moussette,
Observatoire de la Découverte Québec Canada
Nov. 17, 2007		 #1, more

Canon 40D 100mm 400mm Lents f 5.6 at 3200 ISO 1 minutes exposed

more images (Nov. 18-19): from Markus Weber of Trier, Germany; from Günther Strauch of Borken, NRW, Germany; from Bum-Suk Yeom of Bohyunsan, Yeongcheon-city, Gyeongsangbuk-do, South Korea;

more images (Nov. 16-17): from Terry Mclean of Alexandria, Ontario, Canada; from Ron Baart of Alphen aan den Rijn, The Netherlands; from John Hacker of Lamar, Missouri; from Danilo Pivato of Rome - Italy; from the Associazione Astronomica Cortina of Cortina d'Ampezzo (Italy); from John Henley of Starfield Observatory, Nambour, Queensland. Australia; from Tuguldur Sukhbold of Tucson, Arizona;