Copyright © 2000 by Akimasa Nakamura (Kuma Kogen Astronomical Observatory, Japan)
Nakamura obtained this image on 2000 November 22.62, while using a 60-cm f/6 reflector and a CCD camera.
Copyright © 2007 by Rolando Ligustri (Italy)
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
This image is composed of two images obtained by G. W. Kronk of comet 17P/Holmes on 2007 October 25, after it had undergone a brightness outburst of 12-13 magnitudes. The image reveals the comet's increase in size during a seven-hour period. To the naked-eye, the comet's brightness did not seem to change during this period. Each image is a combination of 38 images obtained over a period of two minutes using a 20-cm Meade SCT, an f/3.3 focal reducer, and a MallinCam Hyper video camera.
Copyright © 2007 by Javier Alonso Labrador (Agrupacin Astronmica de Tenerife, A.A.T.)
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
G. W. Kronk obtained this image of comet 17P/Holmes on 2007 October 28. It is a 30-second exposure obtained using a Canon Digital Rebel XTi at the prime focus of a 20-cm Meade SCT.
Copyright © 2007 by Rolando Ligustri (Italy)
Copyright © 2007 by Jose Francisco Hernandez (Observatorio Altamira Fasnia, Tenerife)
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
G. W. Kronk obtained this image of comet 17P/Holmes on 2007 November 5. It is a 30-second exposure obtained using a Canon Digital Rebel XTi at the prime focus of a 20-cm Meade SCT.
Copyright © 2007 by Rolando Ligustri (Italy)
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
G. W. Kronk obtained this image of comet 17P/Holmes on 2007 November 7. It is a 30-second exposure obtained using a Canon Digital Rebel XTi at the prime focus of a 20-cm Meade SCT.
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA) and Jan Timmermans (Valkenswaard, The Netherlands)
Two images obtained about 13 hours apart from two different continents were put together by Timmermans to create an animation showing the comet's motion.
Copyright © 2007 by Ian Wheelband (near Thornbury, Ontario, Canada)
I. Wheelband stacked ten 1-minute exposures that he obtained on 2007 November 10, using a Skywatcher ED100 Pro telescope and an SBIG STL-11000M camera. The stack was centered on the nucleus. He processed the image to bring out details within the coma.
Copyright © 2007 by Len Benschop (Charleston Lake, Ontario, Canada)
L. Benschop obtained this image of comet 17P/Holmes on 2007 November 11. It is composed of three 30-second exposures obtained using a Canon 400D with a 75-300mm USM lens @ 75mm. The camera was set at ISO 1600 and was mounted on a tracking platform. The Alpha Persei Cluster, also known as "Mel 20" is just below the comet.
Copyright © 2007 by Jan Timmermans (Valkenswaard, The Netherlands)
J. Timmermans obtained this image on 2007 November 11 using his William Optics Zenithstar 80 ED II APO with Meade 3.3 Focal Reducer, and an ATK16IC Monochrome Camera.
Copyright © 2007 by Howard Eskildsen (Ocala, Florida, USA)
Copyright © 2007 by Jan Timmermans (Valkenswaard, The Netherlands)
J. Timmermans obtained this image on 2007 November 18 using his William Optics Zenithstar 80 ED II APO, a Meade 3.3 Focal Reducer at f/3 [focal length 240 mm], an ATK16IC camera, and Astronomik LRGB filters.
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
G. W. Kronk obtained this image of comet 17P/Holmes on 2007 November 18.03-18.04. It is composed of ten 30-second exposures obtained using a MallinCam Hyper at the prime focus of a 20-cm Meade LX200.
Copyright © 2007 by Gary W. Kronk (Kronk Observatory, Illinois, USA)
G. W. Kronk obtained this image of comet 17P/Holmes on 2007 November 19.98-19.99. It is composed of thirteen 30-second exposures obtained using a MallinCam Hyper at the prime focus of a 20-cm Meade LX200.
Copyright © 2007 by Howard Eskildsen (Ocala, Florida, USA)