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Images - Session 533 (2012-12-16)

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Objects Session Notes
Bullet (1107) Lictoria - Minor Planet
 
Bullet Photometric Monitoring - Variables
- CI Cyg

- DY Per attempt failed (due to cloud)
   
Bullet Astrometric Monitoring - Nearby Stars
- None
- Late Evening session (1.3 hrs duration). 
Sky rapidly clouding over.
- Session operated under semi-automated control, with remote monitoring from indoors computer.  
- Ambient Temperature: +1.5°C (minimum) before rising to +3.5°C as cloud developed.
- CCD operation -30°C (at 87% average cooling).  
- main objectives of the session were to acquire images of selected project stars for ongoing photometric and astrometric analysis. Opportunity was taken to acquire an image of Lictoria as it moves towards it forthcoming occultation of HIP 20885 on Dec 27th.
-

(1107) Lictoria - Minor Planet

(1107) Lictoria - moving through starfield in Taurus

Lictoria is highlighted in images below by the white cross hairs.

Image

Annotated CCD Image (50% size)
30s exposure (single frame), 3x3 binning, C Filter 
2012-12-16 19:55 hUT (#533014)
12" LX200R  (at f/9.7) + ST-10XME

 

Image

Annotated CCD Image (cropped)
Image details as above

Note : (1107) Lictoria is predicted to occult the 3.2 magnitude star HIP 20885 (77-Theta1 Tauri)  
on 2012-12-27 at around 19:23/19:25 h UT as seen from NE Scotland
http://www.asteroidoccultation.com/2012_12/1227_1107_27189_Map.gif

In preparation for this event some test images of HIP 20885 (77-Theta1 Tauri)  were acquired.
Due to cloud 1s exposure were required to capture a decent image of the star and its double star partner.
However even with shortest exposure of 0.05 to 0.12s and playing with the subframe size around the star it was not
possible to an image more frequently than once very 3 secs (due to download/display turnaround), 
rather than the 0.5s turnaround hoped for.   
In the next session I will try using the autoguider on my ST10 camera to see if I can achieve a faster frame rate.

HIP 20885 (Taurus) 
image taken through light cloud

Image

Annotated CCD Image (cropped)
1s exposure (single frame), 9x9 binning, C Filter 
2012-12-16 20:40 hUT (#533180)
12" LX200R  (at f/9.7) + ST-10XME

Star Chart showing the predicted forthcoming occultation of HIP 20885 (77 Tauri)
(made using TheSky)
Image

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Last Updated : 2024-06-13
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