COMET IMAGE GALLERY (comets 401-500)
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COMET IMAGE GALLERY (comets 401-500)
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| Unless otherwise specified, all photographs on this and subsequent pages are copyright Alan Hale, and all CCD images are copyright Earthrise Institute. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet LINEAR C/2006 XA1 (no. 401). CCD image taken evening of March 1, 2007 (eight days before I picked it up visually). This is a combination of four 1-minute exposures taken over the course of about 20 minutes. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 2P/Encke (no. 402). Two images taken by "Countdown" mentor Mike Holloway in Van Buren, Arkansas. Left: Evening of February 21, 2007 (almost three weeks before I picked it up visually). To the upper left and lower right of the comet can (faintly) be seen a "trail" of debris in Comet Encke's orbit. (Mike explains this more fully in a recent article on the Sky & Telescope web site). Right: Evening of March 17, 2007. Both images used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 2P/Encke (continued). Left: as viewed with the SECCHI Heliospheric Imager 1 camera aboard NASA's recently-launched Solar TErrestrial RElations Observatory (STEREO) spacecraft on April 3, 2007. A faint, straight and narrow tail can be seen extending to the comet's upper left. SECCHI data courtesy NASA, image processing provided by Alan Watson, used with permission. Right: CCD image taken by "Countdown" mentor Mike Holloway on evening of April 11, 2007. Because of the comet's low elongation at the time (22 degrees) the tail structure was not detectable visually. Image used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 2P/Encke (continued). Image taken with the LASCO C3 coronagraph aboard SOHO on April 28, 2007; the comet is just above the "18" in the time tag. Image courtesy NASA and ESA. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 2P/Encke (continued). These are two images taken on April 20, 2007, by the Heliospheric Imager aboard the STEREO spacecraft, and show the comet's tail being ripped away by a passing coronal mass ejection. The event is described in an October 1, 2007 NASA press release (which includes a detailed movie showing the event in its entirety) and in a published scientific paper. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet Garradd C/2007 E1 (no. 403). Left: CCD image taken March 24, 2007 by John Drummond from Gisborne, New Zealand. Used with permission. Right: CCD image taken April 12, 2007 by "Countdown" mentor Mike Holloway, Van Buren, Arkansas. Used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet Garradd C/2007 E1 (continued). Image taken with Earthrise Institute CCD system, night of April 17-18, 2007. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet Lovejoy C/2007 E2 (no. 404). Left: CCD image taken March 16, 2007 (the morning after Terry Lovejoy's discovery) by John Drummond from Gisborne, New Zealand. Used with permission. Right: CCD image obtained by "Countdown" mentor Mike Holloway from Van Buren, Arkansas on April 12, 2007. While the coloration wasn't noticeable, this image otherwise accurately reflects the comet's visual appearance when I observed it later that same morning. Used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet Lovejoy C/2007 E2 (continued). Left: Image taken with Earthrise Institute CCD system, April 18, 2007. Right: CCD image obtained by "Countdown" mentor Mike Holloway from Van Buren, Arkansas on May 13, 2007, showing the faint tail that is also detectable visually. Used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 96P/Machholz 1 (no. 405). Left: in LASCO C3 coronagraph aboard SOHO on April 4, 2007, approximately 8 1/2 hours after perihelion passage. Image courtesy NASA and ESA. Right: SECCHI Heliospheric Imager 1 camera aboard STEREO, April 6, 2007. SECCHI data courtesy NASA, image processing provided by Rainer Kracht, used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Comet 96P/Machholz 1 (continued). Image taken by "Countdown" mentor Mike Holloway from Van Buren, Arkansas, April 12, 2007. Used with permission. | ||||||||||||||||||||||||||||||||||||||||||||||||
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