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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

Animated GIF showing four images taken over the course of 15 months.
Barnard's star is the one that moves (heading south).



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 five observations...
The measured parallax is 0.5487 arcseconds, which corresponds to a distance of 1.817 ± 0.07 parsecs.
High precision professional measurements give it a distance of 1.834 ± 0.001 parsecs.

The computed proper motion is a whopping 10.52 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/ms.pdf .


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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