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CCD Images - Session 134 (2006-08-24)

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Objects Session Notes
Bullet Groombridge 1830 - Nearby star
Bullet Barnard's Star
Bullet U Her - Mira variable
- 40 min session,cut short by rapidly developing cloud
- CCD operation of -15 degC
- main objectives where to acquire images as part of ongoing project on nearby stars and specific variables, in the event only 3 targets were imaged before cloud forced the session to end.
- More Notes

Groombridge 1830 - Nearby star 

Astrometric measurements made, as part of a ongoing study to attempt to measure proper motion and annual parallax of Groombridge 1830.
(Groombridge 1830 Project )

Groombridge 1830  (Ursa Major)
Nearby star - 29.9 light years from the Sun
Star with 3rd largest proper motion

 
Astrometry measurement of Groombridge 1830  based on 12 images (#130009-24)
1x1 binning, 20s exposure, C Filter
Date/Time (UT) Star RA (epoch 2000) Dec (epoch 2000)  
2006-08-24 22:09  Groombridge 1830 11h 53m 00.99s +/-0.02s +37d 42m 28.29s +/-0.16s  
Average Position, Errors bars at +/-1 SD

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Barnard's Star (HIP 87937)

Astrometric measurements made, as part of a ongoing study to attempt to measure proper motion and annual parallax of Barnard's Star.  (Barnards Star Project)

Comparison of Barnard Star position at 
2006-05-06  & 2006-08-24 & (0.30 year period)
Image
Animated CCD Images
2006-05-06 : av5 x 10s, 1x1 binning, C Filter (#122252-56)
2006-08-24 : av7 x 10s,  1x1 binning, C Filter (#134030-36)

 

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U Her - Mira variable

Images collected as part of a ongoing study to develop a light curve for this Mira variable [U Her project

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This Web Page: CCD Images - Session 134 (2006-08-24)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site