This is one of many great Comet Catalina pictures that have been posted in the
December Recent Submissions thread in The Observation Deck forum. José J. Chambó's fine image was
posted there by Sandgirl on December 28 (note that she posted many other images too on the same day). Another great Comet Catalina image posted by Sandgirl on December 28 is David Eagle's
Comet Catalina Disconnection Event Animation - 21st December 2015. Do check it out! Both José J. Chambó's and David Eagle's images show the comet on the same day, December 21. Yet another fine Catalina image was posted by Sandgirl on the same day. That one was made by Fritz Helmut Hemmerich and is a composite image showing how the comet changed position and appearance in 24 hours.
It is interesting to see how the long ion tail changes appearance when it is pummeled by charged particles from the solar wind, while the stubby dust tail stays much the same. Today's APOD really gives us a good idea of how chaotic and rapidly variable the long ion tail is.
Anyway, I need your help. Can anyone tell me what galaxies are seen in today's APOD almost right "in front of" Comet Catalina? While you're at it, could you tell me what galaxies are seen at top right in Fritz Helmut Hemmerich's image, and what is that blue star at bottom right? And what is that bluish star seemingly tangled in the comet's tail in Eric Recurt's image,
posted by Sandgirl on December 26?
Thanks in advance for your help! And A Happy New Year to everyone!
Ann
This is one of many great Comet Catalina pictures that have been posted in the [url=http://asterisk.apod.com/viewtopic.php?f=29&t=35418]December Recent Submissions thread[/url] in The Observation Deck forum. José J. Chambó's fine image was [url=http://asterisk.apod.com/viewtopic.php?p=252139#p252139]posted there by Sandgirl[/url] on December 28 (note that she posted many other images too on the same day). Another great Comet Catalina image posted by Sandgirl on December 28 is David Eagle's [i]Comet Catalina Disconnection Event Animation - 21st December 2015[/i]. Do check it out! Both José J. Chambó's and David Eagle's images show the comet on the same day, December 21. Yet another fine Catalina image was posted by Sandgirl on the same day. That one was made by Fritz Helmut Hemmerich and is a composite image showing how the comet changed position and appearance in 24 hours.
It is interesting to see how the long ion tail changes appearance when it is pummeled by charged particles from the solar wind, while the stubby dust tail stays much the same. Today's APOD really gives us a good idea of how chaotic and rapidly variable the long ion tail is.
Anyway, I need your help. Can anyone tell me what galaxies are seen in today's APOD almost right "in front of" Comet Catalina? While you're at it, could you tell me what galaxies are seen at top right in Fritz Helmut Hemmerich's image, and what is that blue star at bottom right? And what is that bluish star seemingly tangled in the comet's tail in Eric Recurt's image, [url=http://asterisk.apod.com/viewtopic.php?p=252084#p252084]posted by Sandgirl[/url] on December 26?
Thanks in advance for your help! And A Happy New Year to everyone! :D
Ann