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Weird SNR

Started by XT10, 11/13/2010 02:28AM
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Posted 11/13/2010 02:28AM | Edited 11/13/2010 02:38AM Opening Post
David Tasch
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Join Date: Jun 2002

Location: Austin TX, US

Posts: 115

Here's 220 minutes (22x 10min)of HA (7nm) on Abell 85. (Intes MN61 with a SBIG ST-8300 binned 2x2) I was having problems with differential flexure and/or field rotation so it's pretty ugly, but I thought it was interesting enough to post. It's definitely worth revisiting. Jim, I really like the ST-8300. I did not keep my OSC camera.

Enjoy,

David

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Posted 11/13/2010 10:43PM #1
Charles Hakes
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Join Date: Jun 2001

Location: Durango CO, US

Posts: 690

That does sort of look like field rotation. But not quite the same as I saw with using the LX200 in alt-az. There is a photoshop trick with layers to reduce elongated stars, and I'll bet it would work with this too, just a bit more challenging to implement. Yes, definitely worth another visit.
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Fort Lewis Observatory: (37.238, -108.052) ~2360m (7744 ft.) elevation.
Darkness - typically 6.5+
Scope - Meade 16" LX200; f6.3 focal reducer
Focus - JMI Smart focus
Camera - SBIG ST-10XE; (~.5"/pixel)
Guiding - AO-8 and/or Meade 5"/DSI/PHD
http://www.fortlewis.edu/observatory
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