NGC4236, Caldwell 3 - a photo on Flickriver

            NGC4236 is a famously difficult target to observe. It is a barred spiral galaxy with a large extent in the sky. Its length is more than 2/3 the Moon’s width, but it has a very low surface brightness, barely brighter than the background glow of the sky. The mean surface brightness is 24.3 mag/asec2; the outer arms are much fainter. Given that there are magnitude 9 and 10 stars nearby, which I did not want to overexpose, I elected to try and capture the galaxy with many short exposures. The clusters of faint background galaxies at the northern end of 4236 are worth inspecting.

80 x 120s Lum, 15 x 300s RGB, 

T: 250mm RC with 0,72 reducer
C: QSI 683 
M: SW EQ8

Taken on: March 8, 2023

Tags:

Caldwell 3

NGC4236

Sets appears in: • Galaxies

Groups appears in: • Astronomers Talk • LDAS Astrophotography Group more » • ARTISTIC EXPRESSION - ASTROPHOTOGRAPHY - By Invitation Only « less

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