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Posters

Posters have been made from six of the images that appear below. They can be viewed here.

Copyright

My lack of any formal statement on these pages has caused some confusion about the ownership and use of the images on these pages. All images on this page are copyright Robert H. McNaught. They can be freely used at the resolution given here on any web site, presentation or educational publication that is non-commercial, provided that appropriate credit is given. It is requested however that no more than three images be used, otherwise a link should be given to this page. These images were obtained by Rob McNaught with his own equipment in his own time and are not the property of the ANU. There have been so many requests for high resolution copies of these images that I ask that all enquiries for these to go directly to Science Photo Library.

2007 Jan 18

From SSO on Jan 18

C/2006 P1 on Jan 18, 10:22 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 135mm, f/2.0, 2 sec exp., ISO 1600

Viewing the comet's tail with the naked eye at the time of the above image, the appearance was very strongly that of de Cheseaux's wookcut of the 1744 comet, long believed to have had six separate tails. Even the circumstances of the observation were similar to de Cheseaux's, but in the case of P1, we know these are not separate tails but structures within a single dust tail (be these structures synchrones or striae). This presumably is the explanation of de Cheseaux's drawing.

2007 Jan 19

From SSO on Jan 19

C/2006 P1 on Jan 19, 10:22 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 135mm, f/2.2, 30 sec exp., ISO 200

From SSO on Jan 19

C/2006 P1 on Jan 19, 10:28 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 50mm, f/2.0, 30 sec exp., ISO 200

2007 Jan 20

Note that the camera mount has been moved from yesterday, so the grass tree is in a different azimuth. However the images cover the same angular field of view on the sky as yesterday, so it is clear how the tail has enlarged in 24 hours. All images on this page are uncropped.

From SSO on Jan 20

C/2006 P1 on Jan 20, 10:26 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 50mm, f/2.8, 90 sec exp., ISO 200

From SSO on Jan 20

C/2006 P1 on Jan 20, 10:46 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 50mm, f/2.0, 50 sec exp., ISO 640

From SSO on Jan 20

C/2006 P1 on Jan 20, 10:38 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 135mm, f/2.0, 120 sec exp., ISO 200

2007 Jan 21

Widespread cloud. Not practical to drive to clear skies.

2007 Jan 22

Cloud at SSO required a dash to the west and then south to escape encroaching cloud. Ended up near Dubbo with the lights of Narromine to the right of the setting comet.

From Dubbo on Jan 22

C/2006 P1 on Jan 22, 10:55 UT. Photo: R. H. McNaught, near Dubbo, NSW. Canon 5D, 135mm, f/2.0, 50 sec exp., ISO 400

From Dubbo on Jan 22

C/2006 P1 on Jan 22, 11:12 UT. Photo: R. H. McNaught, near Dubbo, NSW. Canon 5D, 50mm, f/2.0, 110 sec exp., ISO 400

2007 Jan 23

Widespread cloud. Not practical to drive to clear skies.

2007 Jan 24

Cloud at SSO, so headed south eventually setting up about 40km SW of Dubbo.

From Dubbo on Jan 24

C/2006 P1 on Jan 24, 10:39 UT. Photo: R. H. McNaught, near Dubbo, NSW. Canon 5D, 50mm, f/2.8, 360 sec exp., ISO 400. Medium combine of 3x120sec exps

From Dubbo on Jan 24

C/2006 P1 on Jan 24, 10:49 UT. Photo: R. H. McNaught, near Dubbo, NSW. Canon 5D, 50mm, f/2.8, 120 sec exp., ISO 400

2007 Jan 25

From SSO on Jan 25

C/2006 P1 on Jan 25, 10:26 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 24mm, f/4.0, 300 sec exp., ISO 400. Medium combine of 5x60sec exps

From SSO on Jan 25

C/2006 P1 on Jan 25, 10:45 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 50mm, f/2.8, 600 sec exp., ISO 400. Medium combine of 5x120sec exps

Discovery Team!

Rob McNaught and Uppsala Telescope

Rob McNaught with the Uppsala Schmidt telescope and 4Kx4K CCD.

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