Re: Sharpless 274

Bernard Miller



Excellent result. It compares very favorably to yesterday’s APOD.





From: On Behalf Of Dan Crowson
Sent: Friday, March 26, 2021 8:11 PM
To: 'Dan Crowson' <dcrowson@...>
Subject: [DarkSkyNewMexico] Sharpless 274


Sharpless 274 (Abell 21, LBN 1051 and the Medusa nebula) is a planetary nebula located approximately 1050 light-years away in Gemini.


Ha – 30x1800s – 900 minutes – binned 1x1

OIII – 24x1800s – 720 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2


1720 minutes total exposure – 29 hours


Imaged over 14 nights from February, 2016 through February, 2020 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.




My previous LRGB image can be found here -



Dan Crowson                          dcrowson@...
Dardenne Prairie MO     


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