Deep Sky Object in Spring
M108 (Galaxy in Ursa Major)

Date & Time: Jan 10 2016, from 23:39 to 24:30 JST(+0900)
Composed 6 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium UV/IR cut filter
Auto-guided with Meade LX200 Eqatorial & Pictor 201XT
Digital Camera: Canon EOS 600D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO1600

M108 (NGC3556) / Galaxy, type SB(s)cd III-IV
R.A.11h 11m 31.8s (2000.0)
Dec.+55° 40' 15" (2000.0)
Apparent Size8.7×2.3'
Radial Velocity865km/s
Distance23 million light yrs.
Group of GalaxiesUrsa Major N Group
Other IDsUGC6225, MCG9-18-98,
M108 is a faint irregular galaxy about 2 degrees southeast of beta UMa (Merak), it shows us its edge being on, and you can see a long ellipse via telescopes. It lookes like a shrinked M82, a irregular and bright galaxy in Ursa Major. The galaxy M108 has a length of about 8 arc minutes, but faint with a magnitude of 10.7, it's hard to enjoy the shape unless you have a high magnification and extremely good conditioned night.
You can find out a famous planetary nebula of M97, Owl Nebula, about 50 arc minutes southeast from M108. The distance is estimated about 23 million light years.

Jump to Wide field of M97 & M108
Finding chart of M97 & M108 Finding chart of M97 & M108

  You can find this pair easily by tracing 2 deg. SE of beta UMa. And they can be caught in same field of portable binoculars.
(Taken with f=200mm telephoto lens)



Copyright(c) 2016 by Naoyuki Kurita, All rights reserved.
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