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Barnard's Star


From the author of   Sizing Up The Universe


TYC 425-2502-1
RA = 17h:58m:26.60s, Dec = +04d:45m:16.5s

Stack/overlay of six images taken over the course of 28 months.
Barnard's star is the jagged sequence near the center of the image.
Use "mouse over" to see dates.




Barnard's Star 2012 to 2014

 

Here's a close-up of five images aligned on the other stars and then stacked together. Also shown is the best-fit regression curve.
Barnard's Star Best Fit

Based on these six observations...
The measured parallax is 0.547757 arcseconds, which corresponds to a distance of 1.826 ± 0.061 parsecs.
High precision professional measurements give it a distance of 1.834 ± 0.001 parsecs.

The computed proper motion is a whopping 10.46 arcseconds/yr.
The professional measurement of Barnard star's proper motion is 10.37 arcseconds/yr.

For an explanation of the proper motion and parallax, see http://www.princeton.edu/~rvdb/images/NJP/BSaaap.pdf.

For a detailed explanation of how the best-fit curve was found, see http://www.princeton.edu/~rvdb/tex/BarnardStar/BS.pdf .


Barnard's Star 2014-10-27

19:33 EDT, Oct 27, 2014
Starlight Express SXV-H9 on 10" RC
Luminance = best 121 out of 234 eight-second frames
Fat-tail Richardson-Lucy deconv


Barnard's Star 2014-07-05

23:23 EDT, Jul 05, 2014
Starlight Express SXV-H9 on 10" RC
Luminance = best 130 out of 200 eight-second frames
Fat-tail Richardson-Lucy deconv


Barnard's Star 2014-04-10

05:40 EDT, Apr 10, 2014
Starlight Express SXV-H9 on 10" RC
Luminance = best 90 out of 100 eight-second frames
Fat-tail Richardson-Lucy deconv


Barnard's Star 2013-09-05

21:25 EDT, Sept 6, 2013
Starlight Express SXV-H9 on 10" RC
Luminance = best 120 out of 150 eight-second frames
Fat-tail Richardson-Lucy deconv


Barnard's Star 2013-06-05

02:44 EDT, June 6, 2013
Starlight Express SXV-H9 on 10" RC
Luminance = best 125 out of 140 eight-second frames
Fat-tail Richardson-Lucy deconv


Barnard's Star 2012-06-21

03:21 EDT, June 21, 2012
Starlight Express SXV-H9 on 10" RC
Luminance = best 85 out of 110 eight-second frames
Fat-tail Richardson-Lucy deconv

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