ASTRO: Barnard's Star 2011 added

I've added 2011 making it a 5 year animation.

As mentioned before I wasn't planning an animation when I started this 5
years ago. Exposure times varied greatly making a mess of the
animation. I did the 4 year animation several ways. First using 2010's
star background and pasting overlaying it with the star's image plus
that of the stars around it. I enhanced each so Barnard's star was
rather constant ignoring how it messed up the background. So right
around the star you will see the stars changing greatly but the rest
stays constant. For 2011 I used the same exposure time as 2010 so the
last frame is used in its entirety. A few fainter stars change but for
the most part it is a good match to 2010 used for the rest of the
background.

The second link uses the entire frames for each year. I set the black
point to match that of the shortest exposure. This cost most of the
dimmer stars but makes for a true animation. Seeing changed greatly
some years to the stars really show this effect. I lucked out in that
2010 and 2011 were taken under very similar seeing so little change is
seen.

Please let me know which you prefer. The first with the nearly constant
background or the second pure animation with far fewer stars.

http://www.prairieastronomyclub.org/...os/BS07-11.gif

http://lh6.googleusercontent.com/-Ps...BS07-11RAW.gif

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Very nice Rick. Now this would be even more fun if this was a double star
that could be seen orbiting each other while moving among the other stars
:-)

Stefan

"Rick Johnson" schrieb im Newsbeitrag
om...
I've added 2011 making it a 5 year animation.

As mentioned before I wasn't planning an animation when I started this 5
years ago. Exposure times varied greatly making a mess of the
animation. I did the 4 year animation several ways. First using 2010's
star background and pasting overlaying it with the star's image plus
that of the stars around it. I enhanced each so Barnard's star was
rather constant ignoring how it messed up the background. So right
around the star you will see the stars changing greatly but the rest
stays constant. For 2011 I used the same exposure time as 2010 so the
last frame is used in its entirety. A few fainter stars change but for
the most part it is a good match to 2010 used for the rest of the
background.

The second link uses the entire frames for each year. I set the black
point to match that of the shortest exposure. This cost most of the
dimmer stars but makes for a true animation. Seeing changed greatly
some years to the stars really show this effect. I lucked out in that
2010 and 2011 were taken under very similar seeing so little change is
seen.

Please let me know which you prefer. The first with the nearly constant
background or the second pure animation with far fewer stars.

http://www.prairieastronomyclub.org/...os/BS07-11.gif

http://lh6.googleusercontent.com/-Ps...BS07-11RAW.gif

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".