Deep Sky Object in Summer
UGC10214 (Tadpole Galaxy in Draco)

Date & Time: Mar 26 2004, from 24:31 to 25:00 JST(+0900)
Composed 4 shots with 8 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Fujifilm FinePix S2 Pro
Location: Ooizumi vil., Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

UGC10214 / Galaxy, type SB(s)c pec
R.A.16h 06m 8.5s (2000.0)
Dec.+55° 25' 01" (2000.0)
Apparent Size3.6×0.8'
Radial VelocityN/A
Diatnce450 million light yrs.
Group of GalaxiesN/A
Other IDsMCG9-26-56, CGCG275-23
Arp 188, PGC57129
Around the middle of Dragon's body, this is a deep-deep sky object at 3.2 degrees SSE of beta Draconis. It's a very dimmed galaxy without NGC numbers, recognized by catalogue numbers of UGC10214, Arp 188 and so on. The galaxy has a long axis of only 3 arc minutes and a brightness of 14.4th magnitude.
The galaxy has captured by the Hubble Space Telescope (HST) and its anomalous shape has been become clear. The galaxy has a tail structure stretching toward east with a length of 3 arc minutes; this fact has given this galaxy a nickname of "Tadpole Galaxy". It's considered that the tail with a real length of 300 or 400 thousand light years has formed by a collision with a companion galaxy. Another collided galaxy is concealed just behind UGC10214. It's estimated that the galaxy is about 45 millions light years away.

Tadpole Galaxy captured by HST Tadpole Galaxy captured by HST

Abell 2199

Arp 101

Copyright(c) 2004 by Naoyuki Kurita, All rights reserved.
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