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CCD Images - Session 246 (2007-12-24)

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Objects Session Notes
Bullet Z And - variable star
Bullet 2007 XH16 - Near Earth Asteroid (NEA) / Minor Planet
Bullet PGC 1772934 and adjacent galaxies
Bullet Astrometric & Photometric Monitoring
- SS Cyg  (dwarf nova)
- BL Lac (Blazar)
- U And  (mira variables)
- Z And, TT Ari, RZ LMi, RX And, DY Per (variables)
- Evening session (4.6hr).  Operated under automated control  
- CCD operation of -25 degC (at 61% average cooling). 
- main objectives were to acquire images of certain selected stars of ongoing photometric and astrometric analysis. 
- secondary objective was to record passage of NEA 2007 XH16 (565m diameter) as it passed earth at a distance of ~ 8 LD.
- CCDSoft application froze during image linking on the 5th target and the imaging had to be kicked off to secure the planned target list.
- Short mapping problems that have hampered the past few sessions were overcome in this session, by manually mapping the first synced star 5 times before commencing an automated short mapping run.

Z And (ZAND)

Z And  (Andromeda)
Brightening of Z And noted in photometric measurements of Z And on 2007-12-24, 
(confirmed by further measurements on 2007-12-25 & 2007-12-27)
Image
 
Earlier image of Z And
Image
 
Photometry  V & B  Bands
Image
Image
Image

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2007 XH16 - Near Earth Asteroid (NEA) / Minor Planet

2007 XH16 is a 565m diameter asteroid which passed by the earth on 2007-12-24 at a distance of 8.1 lunar distance (LD). A sequence of images of 2007 XH16 were recorded streaking through a star field in Aries

MPL 2007 XH16 passing through star field in Aries
Asteroid appears as a 30 arc sec streak in this 30 sec exposure
Image
CCD Image 
30 sec, 2x2 binning, C Filter
2007-12-25 00:24hUT (#246134)
 
   
 MPL 2007 XH16 - showing motion across star field in Aries
Image
Stacked CCD Image 
10 x 30 sec exposures with 45 sec gaps between frames
 (sum combine),  2x2 binning, C Filter
2007-12-25 00:21 to 00:32hUT (#246129-47)
 
  
 MPL 2007 XH16 - showing rapid motion (1.0 arc min per minute)
Image
Annotated CCD Image 
30 sec exposures with 45 sec gaps between frames
Image details as above
  
Image
CCD Image Animation 
30 sec exposures / 20 frames
  2x2 binning, C Filter
2007-12-25 00:21 to 00:33hUT (#246129-48)
 

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PGC 1772934 and adjacent galaxies

PGC 1772934 and adjacent faint galaxies (Aries)
| PGC 1772934 catalog mag +16.3 | PGC 1775172 catalog mag +17.5 |
| PGC 1774800 catalog mag +17.9 | PGC 1773637 catalog mag +16.6 |
| PGC 1773576 catalog mag +17.1 |
Image
Annotated CCD Image 
25 x 30 sec exposure (sum combine),  2x2 binning, C Filter
2007-12-25 00:29 hUT (#246129-53)
 
13 min total exposure 

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 246  (2007-12-24)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site