D7200 DSLR Astrophotography: Crescent Moon, M77 Galaxy
Posted: 23 November 2017
The sky was cloudy on Monday and Tuesday, 20-21 November 2017.
Open: Wednesday, 22 November 2017, 1808 MST
12" f/8 LX600 w/StarLock
2" 24mm UWA eyepiece
1815 MST: LX600 ON, StarLock OFF, High Precision OFF.
Viewed the crescent Moon, 102X.
Then began setting up for imaging. Mounted the D7200 DSLR at prime focus + focal reducer.
Moon, 1/250sec, ISO 400, White Balance Auto
Earthshine and some stars, 1 second, ISO 400, White Balance Auto
1833 MST: did some mirror lock tests.
1857 MST: slewed to M77 (galaxy). I wanted to re-image this galaxy as my previous image (January 2017) had some slight trailing. Began waiting for M77 to rise higher in the sky. Once it did I slewed to the star Algol, focused using a Bahtinov Mask, and locked the mirror. Slewed back to M77. The galaxy was visible in the camera viewfinder.
1942 MST: StarLock ON. Seeing at times was poor, which made autoguiding difficult. But eventually seeing improved. This is a StarLock autoguided, 5 minutes, ISO 6400, White Balance 3570K, image of M77, showing its outer spiral arms:
2003 MST: StarLock OFF. Ended imaging. Removed camera from 12" telescope.
Viewed M77, 102X. Then viewed the star Mira, 102X.
Next, did a tour of some Deep Sky Objects (DSOs) in the constellation of Cetus, 102X: NGC246 (planetary nebula), NGC247 (galaxy), and Caldwell 51 (galaxy). SYNCed on NGC247. I will image NGC247 on a future session. I had previously imaged it with the 8" LX200-ACF and D7000 (October 2012).
2032 MST: LX600 OFF.
Close: Wednesday, 22 November 2017, 2040 MST
Session Length: 2h 32m|
Conditions: Clear, breezy
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