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Images of Comet 2009 P1 Garradd and the Coathanger

BAA members around the country managed to combine to produce a fine set of images over four nights to capture the passing of Comet 2009 P1 Garradd over the Coathanger.

 

2011 September 1 - Maurice Gavin, Worcester Park

 

2011 September 2 - John Vetterlein, Rousay, Orkney

 

2011 September 2 - Maurice Gavin, Worcester Park

 

2011 September 3 - Martin Mobberley, GRAS remote telescope

 

2011 September 4 - Alan Tough - Elgin, Scotland

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Garradd passing Collinder 399 by Martin Mobberley

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Martin Mobberley
Time of observation
04/09/2011 - 11:59
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This image of comet Garrad was taken on 20090903 by Martin using a remote scope (GRAS 20 in New Mexico). It isa 4 minute exposure usinga Takahashi FSQ106 4 inch refractor and a one shot colour camera.Martin preferred this mono image to the colour one.
Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.
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Comet Garradd and M71 by Dennis Boon

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Dennis Boon
Time of observation
04/09/2011 - 11:45
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BAA member Dennis Boon captured this image of comet Garrad passing Messier 71 on20110826 at BST 22.10. Dennis used an RC10 telescope and aCanon 500D digital camera -2minute exposure at ISO 1600. You can see other Garrad images, including an excellent shot of the comet passing the "Coathanger" (Colliner 399) in the Comet Gallery.

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Comet 2009P1 Garradd

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Time of observation
02/09/2011 - 11:04
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ccd image and observation
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BAA Articles

Comet Garradd sweeps past the Coathanger

As Comet Garradd makes its lazy sweep across the night sky, after last weeks close encounter with M71, this week the comet will cross just under the popular asterism known as the Coathanger. Also known as Brocchi’s Cluster and catalogued as Collinder 399 – today, though, it is generally recognised to be just an asterism, a chance collection of stars making up a pattern, rather than a true cluster of stars that were created at much the same time.

The Coathanger also has a special place in the heart of the BAA, as one of the Association’s most active observers, George Alcock, discovered a nova there in 1976.

This chart shows the comets path over the next few days.

This comet is easy with 10×50 binoculars, and is straightforward to find by locating the lovely double star Albireo (Beta Cygni), then hang down south and you will come to the Coathanger, and just under the Coathanger will be found comet Garradd.

If you manage to capture an image of this, please send it in for our picture of the week spot.

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C/2011L3 McNaught

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Time of observation
01/09/2011 - 09:46
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C/2011L3 McNaught

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01/09/2011 - 09:46
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Eratosthenes - Sketch by Sally Russell

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Sally Russell
Time of observation
31/08/2011 - 12:08
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Sketch of Eratosthenes as seen on the terminator. Sketch was made with white pastel and Conte crayon on black Canford paper, using a 105mm F6 refractor at 140x (binoviewers).

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SN 2011fe in M101 by Loyd Overcash

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Loyd Overcash
Time of observation
31/08/2011 - 11:15
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Loyd Overcash is a member of the Houston Astronomical Society, with an observatory in Fort Davis, west Texas, USA. He took this image of supernova SN2011fe on 28th August using a 16 inch RCOS telescope operating at f/9 and an SBIG STL-6303 camera. This image is a stack of 6 x 5 minutes exposures in Luminance, Red, Green and Blue. The image is reproduced here with his permission

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.
BAA Articles

Supernova in M101

The Palomar Transient Factory (PTF) discovered a supernova in M101 on August 24th. At magnitude 17.2 it was pretty faint, but as this supernova was discovered ‘on the rise’ it has been steadily brightening, and may reach mag. 10 or 11 – making it easily visible in binoculars or a small telescope.

Image of supernova PTF11kly in M101 by BAA Member Denis Buczyski

Although M101 is in the circumpolar constellation of Ursa Major, and so will never set from UK locations, it does not attain a very high altitude, and will be best placed for observation as soon as the sky becomes dark.

The observations of supernovae are important, because they are a key component of the distance ladder. This is a series of stepping stone techniques used to measure distances to far-off galaxies. It is thought that type Ia supernovae explode with much the same brightness due to the physical nature of the star, so finding a supernova relatively close-by helps our understanding of the physics of the explosion, and further help the calibration of the distance scale.

Amateur astronomers can best contribute to the science by measuring the brightness of the supernova, and contribute to it’s light curve.

But there is also a great pleasure in seeing for yourself one of the greatest cosmic events, which happened 23 million years ago and the light of the event has just reached us.

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