Arp 172 (Galaxy cluster)

R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.

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From South El Monte , Arp 172 will become visible at around 20:35 (PDT), 62° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 01:51.

Name Arp 172
Object type Galaxy cluster
Comprised of IC1178
IC1181
Position
Right ascension:16h05m [1]
Declination:+17°35' [1]
Constellation:Hercules
Magnitude:15.20 (V) [1]

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