I recorded several observations.
Smallest one was with a 99mm spotting scope. While I missed the galaxy under soso conditions, NGC 7640 was clearly visible under good transparency as a ghostly 3:1...
A little over 2 years ago I posted the text above in reply to this OotW.
Today, the mystery of components A & B of the "double star" Jonckheere 475 has become clearer to me, hence this post.
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With my 24-inch...
At 200x; bright, nearly edge-on 4:1 N-S, ~6.5'x1.5'. Very asymmetric appearance with a brighter, elongated core, ~1.0'x0.5', which is oddly angled NNW-SSE to the major axis. A...
Hi, here's my observation from 11/8/2009: ngc 7640 is a galaxy in Andromeda : mag: 11.3 ; size: 8.1' x 1.7' ; elongated and rather faint ,brighter central area and mottled edges. I used a 10mm Radian...
I remember this galaxy as being somewhat disappointing in my 6" Newtonian telescope because I always hoped to see more of it than an oval glow. With my 20" from Southern France 8 years ago I logged:...
NGC 7640 as perceived by A.L. with a 13" at 70x back in 1991: "Mottled glow amongst faint stars. Elongated. Hard to see where it ends." The mottledness is due to the AI's description of star forming...
