Deep Sky Object in Spring
NGC5204 (Galaxy in Ursa Major)


Date & Time: Mar 20 2020, from 23:54 to 24:48 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


NGC5204 / Galaxy, type SA(s)m
R.A.13h 29m 36.3s (2000.0)
Dec.+58°25' 08" (2000.0)
Apparent Size5.0×3.0'
Radial Velocity+202km/s
Magnitude11.7
Distance14.5 million light yrs.
Group of GalaxiesM101 Group
Other IDsUGC 8490, CGCG 294-39
MCG +10-19-78, IRAS 13277+5840
PGC 47368
NGC5204 is a spiral galaxy positioned at about 3.5 degrees north of Mizar which forms the Big Dipper in Ursa Major. The galaxy's spiral structures are indistinct and seem only elliptic galaxy. An elongated figure in north south direction has a long axis of 5 arc minutes and a brightness of 11.7th magnitude.
It is known that the galaxy has an anomalous intensive X-ray source of NGC5204 X-1 in offset from its nucleus; many studies have been performed. The galaxy has been estimated as 14.5 million light years away, one of members of a galaxy group around the Pinwheel galaxy M101.



NGC5033
Around NGC5216, NGC5218

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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