Caldwell 40
Caldwell 40 (also known as NGC 3626 and NGC 3632) is a lenticular galaxy in Leo, showing a bright central bulge and a smooth disk without
prominent spiral arms.
Several faint dust lanes cross the inner regions, giving subtle texture to the galaxy’s core.
Deep imaging reveals a diffuse outer envelope and a well‑defined disk that appears slightly inclined. The galaxy is notable for
its counter‑rotating gas component, evidence of past accretion or interaction. Caldwell 40 is a member of the NGC 3686 Group.
Object Data
Caldwell:Caldwell 40
Object:NGC 3626 = NGC 3632
Type:Lenticular galaxy (type S0/a)
Constellation:Leo
Distance:64–70 million light‑years
Observation Data
Location:Pollux Observatory, Zuidlaren
Date:2026-03-22
Technical Data
Exposure time:L- 20x 180 sec
R- 120x 180 sec
G- 10 x 120sec
B- 10 x 180 sec
Total: 2.5 h
R- 120x 180 sec
G- 10 x 120sec
B- 10 x 180 sec
Total: 2.5 h
Telescope:Takahashi FSQ106 ED
Camera:ZWO ASI 1600mm Pro
Color palette:LRGB
Filters:Astronomik 6 nm