Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  B85  ·  HD164294  ·  HD164384  ·  HD164402  ·  HD164452  ·  HD164492  ·  HD164514  ·  HD164534  ·  HD164637  ·  HD164704  ·  HD164739  ·  HD313595  ·  HD313596  ·  HD313597  ·  HD313598  ·  HD313606  ·  HD313607  ·  HD313608  ·  HD313710  ·  HD313711  ·  HD313713  ·  HD313714  ·  HD313715  ·  HD313716  ·  HD313718  ·  HD313731  ·  HD313732  ·  HD313733  ·  HD313734  ·  HD313735  ·  And 9 more.
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M20 Triffid Nebula, Chris Ashford
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M20 Triffid Nebula

Getting plate-solving status, please wait...
M20 Triffid Nebula, Chris Ashford
Powered byPixInsight

M20 Triffid Nebula

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Description

Imaged over 2 nights. 

This is the first time I've had the courage to follow the optimum exposure time using Robin Glover's calculator, which told me I needed to take 30 second exposures. I took a few 120s exposures and did a small test, 14 minutes of 120s versus 14 minutes of 30 seconds.....and the winner was the 30 second exposures, so that's what I used.

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M20 Triffid Nebula, Chris Ashford