David's Astronomy Pages Images - Session 598 (2016-12-27)

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Abell 10 - Planetary Nebula (PLN 197-14.1)     Photometric Monitoring - Variables   - None     Astrometric Monitoring - Nearby Stars   - None

- Evening session (4 hrs duration). Clear skies. Wind 0-5 mph.  - Session operated mainly from the observatory  - Ambient Temperature:  -1.5°C (minimum) - CCD operation -25°C and -30°C (at % average cooling).  - Planned objectives of the session were to return 12" LX200 scope back to observing/imaging following replacement of Main Board and to examine impact of RA drive on telescope tracking - Notes from 2016-12-27 >> (includes notes for the period 2016-11-23 to 2016-12-29, with details about LX200 failure in Nov (main board), RA Drive Issue/Fix and plans for new equipment in 2017

Abell 10 - Planetary Nebula (PLN 197-14.1)

Abell 10 / PLN 197-14.1 (Orion) Deep sky challenge object in the Jan 2017 edition of Astronomy Now magazine

CCD Image (50% size) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2016-12-27 22:57h UT (#598220-39) 12" LX200R  (at f/10.4) + ST-10XME

Abell 10 - detail

CCD Image (100% size, cropped) Image details as above

Abell 10 - Imaging Problems due to RA gear slip Poor telescope tracking with 40-50 arc sec jumps in RA every 105 seconds due to worm gear slippage resulted in only 4 usable frames out of 27 frames taken  (an 85% wastage factor). The image below shows an example of a rejected frame

Annotated CCD Image (50% size) 30s exposure, 3x3 binning, C Filter 2016-12-27 23:02h UT (#598235) 12" LX200R  + ST-10XME

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