Deep Sky Object in Summer
Arp 254 (Galaxies in Libra)

Date & Time: Mar 13 2010, from 26:56 to 27:33 JST(+0900)
Composed 4 shots with 12 minutes exposed
Optical: VIXEN 20cm(7.9") VISAC (f=1800mm, F9.0)
Auto-guided with VIXEN ATLUX Equatorial & Meade Pictor 201XT
Digital Camera: Nikon D50 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1600

Arp 254(NGC5917) / Galaxy, type Sb pec?
R.A.15h 21m 32.6s (2000.0)
Dec.-07° 22' 37" (2000.0)
Apparent Size1.5×0.8'
Radial VelocityN/A
Group of Galaxies -
Other IDsMCG -1-39-2, IRAS 15188-711
PGC 54809
Arp 254 is an interacting galaxy pair lying at 2 degrees NNE from beta Librae. A northern galaxy is NGC5917 and a southern dimmed and elongated one is MCG-1-39-3 with a brightness of 14th magnitude. Both galaxies are connected by a dimmed light bridge, considered that the influence of interaction made MCG-1-39-3 elongated.

Arp 101

Arp 330

Copyright(c) 2010 by Naoyuki Kurita, All rights reserved.
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