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CCD Images - Session 371 (2009-05-30)

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 (S372) 		 
Objects Session Notes
Bullet M3 - Globular Cluster
Bullet M24 - Open Cluster
Bullet M17 - Nebula (Swan Nebula)
Bullet Pluto - Dwarf Planet
Bullet V2491 Cyg - Nova
Bullet Photometric Monitoring - Variables
- R CrB, AM CVn, CI Cyg, SS Cyg,
- SS Her, U Her, CY Lyr, RZ LMi
- FG Sge, WZ Sge, ER UMa
Bullet Photometric Monitoring - Nearby Stars
- 61 Cyg, Barnards Star  
- Late Evening Session (2.4 hrs), cloud/murky sky developing towards end of session.
- Operated under automated control with remote control monitoring
- Ambient Temperature  initially 10 deg C, decreasing to 8 deg C.
- CCD operation -25 degC (at 84% average cooling).  
- main objective of the session was to acquire images of key selected stars for ongoing photometric and astrometric analysis. 
- opportunity taken to acquire images of certain gallery objects including 17 and M24
-
- [Attempt at session on 2009-05-29, but aborted after x minutes due to xx]

M3 - Globular Cluster

M3 (Canes Venatici)

Image
CCD Image (50% size reduction, log scaling cropped)
15s sec exposure (single frame), 3x3 binning, C Filter
2009-05-51 00:08 h UT (#371125)
12" LX200R  (at f/5.7) + ST-10XME
[Larger Image - detail ]

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M24 - Open Cluster

M24 (Sagittarus)

Image
CCD Image (50% size reduction)
5 x 30s sec exposure (average combine), 3x3 binning, C Filter
2009-05-51 00:23 h UT (#371139-43)
12" LX200R  (at f/5.7) + ST-10XME
[Larger Image 70% size reduction]

M24 - detail

Image
CCD Image (cropped to central area)
7 x 10s sec exposure (average combine), 1x1 binning, C Filter
2009-05-51 00:26 h UT (#371144-50)
12" LX200R  (at f/5.7) + ST-10XME

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M17 - Nebula (Swan Nebula) 

M17 (Sagittarus)

Image
CCD Image (70% size reduction)
10 x 30s sec exposure (average combine), 3x3 binning, C Filter
2009-05-31 00:36 h UT (#371155-64)
12" LX200R  (at f/5.7) + ST-10XME
[ Full Size ]

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Pluto - Dwarf Planet

(134340) Pluto 
moving through starfield in Sagittarus 
Animation show 5 arc min motion over 96 hour interval (4 days)

Image
CCD Animation
Frames : 3 x 20s exposures (aligned, average combine & cropped),  
3x3 binning , C Filter
1) 2009-05-27 00:59 h UT (#369205-07)
2) 2009-05-29 00:56 h UT (#370020-22)
3) 2009-05-31 00:18 h UT (#371134-36)

12" LX200R  (at f/5.7) + ST-10XME

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V2491 Cyg - Nova

V2491 Cyg (Cygnus) 
Nova 'V2491 Cyg' was discovered in Cygnus by 
Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, and Fujio Kabashima, Miyaki-cho, Saga-ken, Japan, 
on unfiltered CCD images taken 2008-04-10.728 UT  at magnitude 7.7 (IAU Circular No. 8934)
(AAVSO Special Notice #103)
 
Latest image of V2491 Cyg compared with early post-discovery image 
showing that Cyg V2491 has dropped some 8 magnitudes 
and returned to pre-nova levels

415 days (mag < +16 )

4.25 days (mag +8.5)

Image Image
3 x 45s exposure (average combine), 
3x23 binning, C Filter 
2009-05-31 01:02hUT (#371200-02)
12" LX200 R + ST-10XME		 3x20s exposure (average combine), 
2x2 binning, C Filter 
2008-04-14 23:48hUT (#281164-66)
8" LX200 Classic + ST-7E

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 371  (2009-05-30)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site