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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

Günther Strauch,
Borken, NRW, Germany
Nov. 22, 2007
#1, #2

Today the moon was very bright. It was not easy to see the comet Holmes with the necked eyes. So, I create one picture of the moon and one of comet Holmes and create one out of two. Canon EOS 20D, focus distance 100/1000 refractor and 80/600 refractor. Moon 100 ASA/125 secondes, Comet Holmes 1600 ASA, 60 secondes Kind regards Günther

Bill Williams,
Chiefland Astronomy Village, Florida
Nov. 9, 2007
#1, #2, #3

"Comet Holmes Swallows Star" - a mere snack! This comet consumed a whole GALAXY, magnitude 17.2 PGC 166473 on Nov. 9, 2007 as seen in image #1. This distant galaxy resides at a distance of 200 million LIGHT YEARS shining feebly through the blue-green coma of Holmes at a neighborly distance of about 200 million MILES! Image #2 defines the field of image #1 (yellow box) when the tail detached approaching the star 34 Persei. Image #3 is a Sky Tools chart with Holmes' coma superimposed at the time it transited the PGC galaxy. Images were taken with 6-inch Astro-Physics refractor and STL-11K CCD camera.

Martin Wagner,
Sonnenbuehl-Genkingen, Germany
Nov. 20, 2007
#1, more

I photographed with my 10" Newton, f=1300mm and a Canon EOS 300D with Baader H Alpha filter about 50x15s. It was on 20.11.2007 at about 2:00 UT.

Mila Zinkova,
San Francisco, California, USA
Nov. 22, 2007
#1, more

The Moon or not the Moon, but I simply cannot get enough from the amazing comet. We were clouded out for many days before and now the comet is fading, yet she is still bright enough to see and to photograph her even with the Moon light and even with 18 mm lens and it is what I'm doing every evening and every morning.

Michael Zolnowski-Tiamat,
Solaris Observatory
Nov. 22, 2007
#1, more

In a few weeks Comet Holmes will start closing in on the California nebula, one of the biggest deep sky objects in the northern hemisphere. Now the comet is 15 degrees from this amazing nebula. In March the comet will be passing very close to this object but we don't know in what condition will be this strange comet. This picture is made using H-alpha narrowband filter and astrocamera. This is stack of five 30 minutes images.

Erno Berko,
Ludanyhalaszi, HUNGARY
Nov. 20, 2007

Perseus and the Medusa. The beautiful comet 17P near the Mirfak. The sky is very bright (80% Moon). 19:00(UT) The image made with 100mm/f6 refractor and Canon 350D camera. 10x80sec in IRIS.

Gote Flodqvist,
Stockholm, Sweden
Nov. 21, 2007
#1, more

A sigh from history......

Jimmy Westlake,
Mt. Wilson near Pasadena, California USA
Nov. 18, 2007
#1, #2, more

The Colorado Mountain College SKY Club spent a night observing with the historic 60-inch Hale Telescope on Mt. Wilson Nov. 17-18, 2007. While the telescope was aimed at the Blue Snowball Nebula (NGC7662), I photographed the constellation Perseus and Comet Holmes through the open dome. 1) Fuji FinePix S2 digital camera at ISO 800, 16 mm Nikkor lens at f2.8, 15-second tripod mounted exposure. 2) Fuji FinePix S2 digital camera at ISO 800, 35 mm Nikkor lens at f3.3, 30-second tripod mounted exposure.

Jari Kankaanpää,
Kauhava, Finland
Nov. 19, 2007
#1, more

400mm IF-ED Nikkor 5,6 & Nikon D 80 Tracking: 12" Meade LX-200 telescope.

Michael Novak,
Commerce Township, Mi, USA
Nov. 18, 2007

I finally got my shot set and this pesky plane flew through the FOV. Nice detail on the planes wings. Canon 40D 30S ISO800

Richard McCoy,
Mead, Colorado
Nov. 19, 2007
#1, more

Holmes and Mirfak: An awesome sight! Photo Details: Takahashi FSQ and SBIG ST-2000XM

Pavol Rapavy,
Rimavska Sobota, Slovakia
Nov. 21, 2007
#1, #2, more

Morphing images comet 17P/Holmes between Nov.1 and Nov.21, CCD camera SHT 1.3, f=300 mm, crop

more images (Nov. 20-21): from Jan Timmermans of Valkenswaard, The Netherlands; from Rick Baldridge of Oakridge Observatory, Los Gatos; from Jan Koeman of Kloetinge, The Netherlands; from Florin Marc of Tg.Mures, Romania; from Claudio Pincelli of Holyoke, Mass.; from Konstantinos Christodoulopoulos of Korinth, Greece;

more images (Nov. 18-19): from Dave Jurasevich of Mount Wilson Observatory, Mount Wilson, CA; from Rembert Melman of Dieren, Netherlands; from Manuel Cabrera of Mina N.L. México; from Dale J Martin of Lunenburg, MA; from Andres Posada of Medellin, Colombia;

more images (Nov. 16-17): from Chiara Riedo of Mottarone, Novara, Italy; from Tom Teters of Ft. Collins, Colorado; from Lynn van Rooijen of North Holland, Netherlands;

more images (Nov. 14-15): from Denis Goyette of Fort El Kantoui, Tunisia;