Around M106 & NGC4217

Deep Sky Object in Spring

Around M106 & NGC4217 (Galaxies in Canes Venatici)

Click on image to enlarge

Date & Time:	Dec 28 2019, from 27:50 to 29:13 JST(+0900)
	Mosaic of 2 flames 7 shots composed 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

M106 (NGC4258) / Galaxy, type SAB(s)bc II-III
R.A.	12h 18m 57.8s (2000.0)
Dec.	+47° 18' 16" (2000.0)
Apparent Size	19.5×7.0'
Radial Velocity	+656km/s
Magnitude	8.6
Distance	21 million light yrs.
Group of Galaxies	Canes II Group
Other IDs	UGC7353, MCG8-22-104, PGC39600

NGC4217 / Galaxy, type Sb
R.A.	12h 15m 50.8s (2000.0)
Dec.	+47° 05' 32" (2000.0)
Apparent Size	5.2×1.5'
Radial Velocity	1232km/s
Magnitude	12.0
Distance	55 million light yrs.
Group of Galaxies	Ursa Major S Group
Other IDs	UGC7282, MCG8-22-87 CGCG243-53, PGC39241

M106 (NGC4258) is a spiral galaxy about 7.5 degree south-east of gamma UMa. Although this galaxy is in Canes Venatici, it's easy to search that from the Big Dipper.
In spring skies, you can find plenty of galaxies, M106 is fairly bright and easy to appreciate in them. The galaxy has visual magnitude of 8.6 and a size of 20 arc minutes, and you can see that the galaxy is stretching north-south direction through a medium-sized telescope. The distance of M106 is estimated about 21 million light years.
An edge-on galaxy lying only 30 arc minutes southwest from M106 is NGC4217. The galaxy has a length of 5 arc minutes and 12th magnitude in brightness, you can detect a clear central dark lane in this picture.

⇒ Display the spectral profile of M106 (in new window)

Galaxies around M106

Finding chart of M106

M106 is rather apart from gamma UMa, you can find it easier by tracing eastward from kai UMa just south of gamma UMa.
(Taken with f=100mm telephoto lens)

NGC5866(M102)

M108

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