| Object: |
|
Groombridge 1830 (SAO 62738), a 6.4 Magnitude star in Ursa
Major with an unusually high proper motion.
|
| Comments: |
|
The
clip here consists of 2 image frames taken 2 year apart. The clip
mimics the old (and now obsolete) mechanical blink comparator, and
it clearly shows the change in the star's position from April 2014 to May
2016. Groombridge 1830 has a
proper motion of 7.04" per year. Only 2 other stars have a higher
proper motion; Barnard's Star (10.29" per year) and Kapteyn's Star
(8.70" per year). North is up in the image, and the
star's direction of motion is towards the lower left (PA 145.5°). The distance to Groombridge 1830 is 29 light years. |
| Telescope: |
|
Meade 10" f/8 ACF |
| Mount: |
|
Losmandy
G11 German
Equatorial |
| Guide
Scope: |
|
Orion
ShortTube 80 refractor |
| Guide
Camera: |
|
Orion
StarShoot
AutoGuider
with PHD guiding software |
| Imaging
Camera: |
|
QSI
583ws
|
| Filters/Exposures: |
|
Five 15-second exposures through Astrodon RGB
filters (repeated 2 years later). Processed in MaximDl and
Photoshop CS6.
|
| Shooting
Location: |
|
Virginia Beach, VA
|
| Date/Time: |
|
April
2014 (frame 1), and May 2016 (frame 2)
|
| Coordinates: |
|
RA
= 11h 53m, DEC = +37° 43' |
