M25

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dcrowson United States of America
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TSS Photo of the Day

M25

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Post by dcrowson »

M25 (IC 4725) is a trumpler (https://en.wikipedia.org/wiki/Trumpler_classification) class I 2 p, I 3 n or IV 3 r (depending on the source quoted) open cluster approximately 5,538 light-years away in Sagittarius.

Luminance – 24x300s – binned 1x1 – 120 minutes
RGB – 8x180s – 24 minutes each – binned 2x2

182 minutes total exposure – 3 hours 2 minutes

Imaged August 15th and September 5th, 15th and 17th, 2023 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.

LRGB - https://www.flickr.com/photos/dcrowson/ ... 0/sizes/l/

Image

Dan
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