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CCD Images - Session 131 (2006-07-23)

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Objects Session Notes
Bullet XO-1 - Parent Star to exosolar planet
Bullet U Her - Mira variable
Bullet HD 149026 - Parent Star to exosolar planet
Bullet SS Cyg - Variable Star
Bullet TrES-1 - Parent Star to exosolar planet
Bullet 61 Cygni - Star (the 'flying star')
Bullet Gliese 1245 - Nearby Star System - 14.8 ly
Bullet Groombridge 34 - Nearby double star
Bullet Ross 248 (HH And) - Variable Star
- 2 hr 35m session 
- main aim was to acquire baseline images of of HD 149026 and TrES-1 (exosolar planet parent star project) , Gliese 1245 (nearby star project),
- also acquired were images of SS Cyg (variable star project),  61 Cygni, Ross 248 and Groombridge 34 (nearby stars project) and the mira variable (U Her)
- developing cloud prevented acquisition of planned infrared imaging of Maffei 1, Maffei 2 (galaxies largely obscured by Milky Way dust)
- More Notes

XO-1 - Parent Star to Exosolar Planet 

Further baseline images of XO-1 were acquired as part of a project to detect the transit of an exosolar planet, that is known to orbit this star
(exosolar planet project).

XO-1 (Corona Borealis)
XO-1 : GSC 2041:1657
1 : GSC 2041:186,   2 : GSC 2041:976

Image
Annotated CCD Image
60s exposure, 2x2 binning, R Filter 
2006-07-23 22:31 hUT (#131021)

 

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U Her - Mira variable

U Her (Hercules)

U Her is a mira variable with catalog period of 406.1 days and magnitude range of +6.4 to +13.4.
Images were acquired in C, B, V, R & I filters
A magnitude of +7.5 (V band) is estimated fro U Her using the comparison star technique, 
suggesting that the variable is near peak brightness. 
Image 
(V) :  U Her (SAO 102160)
(C) :  SAO 102156  (B: 11.44, V 9.53)
(K) :  GSC 1514:1226

 

Annotated CCD Image
3 x 20s exposure, 2x2 binning, C Filter 
2006-07-23 22:36 hUT (#131027-29)
 

  

 The comparative brightness of U Her in Infrared band is 
shown in the following series of images (2006-07-23)

Image 

CCD Images (cropped) 
5s sec exp, 2x2 binning, 
2006-07-23
B: #131030, V: #131045, R: #131039, I: # 13143

 

Colour analysis of U Her
Although U Her (1.98) and SAO 102156 (1.91) have similar B-V values, 
U Her is relatively much brighter in red and infrared than the B-V value would suggest
(put another way, U Her is brighter in blue than might be expected, given its redness) 
 [ U Her spectral type : M6.5e-M9.5e ]

 Image

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HD 149026 - Parent Star to Exosolar Planet

Baseline images of HD 149026 were acquired as part of a project to detect the transit of an exosolar planet, that is known to orbit this star
(exosolar planet project).

HD 149026 (Hercules)
Image
Annotated CCD Image 
3 x 30s (average combine), C filter)
2006-07-23 22:50h UT (#131053-55)
 
Monitoring HD 149026 for small magnitude changes during exosolar 
planet transits will be difficult due to the lack of a suitable 
reference star of similar brightness within the same field of view.

Less accurate method of monitoring will be to alternate frames of 
HD 149026 with frames from offset reference star.
 Possible offset stars :
 
HIP 80885  (Hercules)
HIP 80885 is actually a double star (Struve 2059) 
with 1 arc sec separation (too small to be 
seen at resolution of image)
Image 
CCD Image 
3 x 15s (average combine), C filter)
2006-07-23 23:14h UT (#131092-94)

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SS Cyg - Variable Star

Measurements made in B, V, R filters as part of ongoing study.    

SS Cyg (Cygnus)

SS Cyg variation between 2006-05-24 and 2006-07-23 
Image 

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TrES-1 - Parent Star to Exosolar Planet

Baseline images of TrES-1 parent star were acquired as part of a project to detect the transit of an exosolar planet, that is known to orbit this star
(exosolar planet project).

TrES-1 Parent Star (Lyra)
~ 500 light years, distance
Planet orbit 3.03 days
Image
Annotated CCD Image 
3 x 20s (average combine), C filter)
2006-07-23 23:32h UT (#131124-26)
 
Note : Discrepancy seen with GSC 2652:1291 (V Band) mag.
Catalog +11.2,  Measured Estimate +10.3. 
Recommend monitoring for variability

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61 Cygni - Star (The 'flying star')

Astrometric measurements made, as part of a ongoing study to attempt to measure proper motion and annual parallax of 61 Cygni.
( 61 Cygni Project )

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Gliese 1245 - Nearby Star System - 14.8 ly

Gliese 1245 (Cygnus)
(Alt Name V1581 Cyg)
Image
Annotated CCD Image (50% size)
7 x 60s (average median combine), 1x1 binning, C filter
2006-07-23 23:49h UT (#131146-52)
 
Gliese 1245 - detail 
A, B, C : can't be resolved)
Image 
Annotated CCD Image (200% size)
Images details as above

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Groombridge 34 - Nearby Double Star - 11.7 ly

Astrometric measurements made, as part of a ongoing study to attempt to measure proper motion and annual parallax of Groombridge 34 
(Groombridge 34 Project).

Groombridge 34 (Andromeda)
A - GX And, HD 1326
B - GQ And
Image
Annotated CCD Image (50% size)
7 x 20s (average combine), 1x1 binning, C filter
2006-07-24 00:09h UT (#131156-62)

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Ross 248 (HH And) - Nearby Star & Variable Star - 10.3 ly

Astrometric measurements made, as part of a ongoing study to attempt to measure proper motion and annual parallax of Ross 248 (And HH)
(Ross 248 Project)

Ross 248 (Andromeda)
Also known as HH And
Image
CCD Image
3 x 30s (average combine), 1x1 binning, C filter
2006-07-24 00:17h UT (#131169-71)

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This Web Page: CCD Images - Session 131 (2006-07-23)
Last Updated : 2018-07-31
Site Owner : David Richards
Home Page : David's Astronomy Web Site