Deep Sky Object in Spring
Around NGC3972 (Galaxies in Ursa Major)


Date & Time: Dec 27 2019, from 27:47 to 28:29 JST(+0900)
Composed 8 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


In the square of the Big Dipper, this image shows you distributed galaxies around 2 degrees north from gamma UMa. Edge-on NGC3972, and face-on NGC3982 and 3998 without definite inner structures have been classified as spirals of SA or SAB types. They are belonging to a widely-spread group of north-Ursa Major galaxy group and 60 to 70 million light years away.

NGC3972 / Galaxy, type SA(s)bc
R.A.11h 55m 46.1s (2000.0)
Dec.+55°19' 07" (2000.0)
Apparent Size4.2×0.9'
Radial Velocity+609km/s
Magnitude13.0
Distance70 million light yrs.
Group of GalaxiesUrsa Major N Group
Other IDsUGC 6904, CGCG 269-16
MCG +9-20-32, IRAS 11531+5535
PGC 37466
NGC3982 / Galaxy, type SAB(r)b: III
R.A.11h 56m 28.1s (2000.0)
Dec.+55°07' 29" (2000.0)
Apparent Size2.3×2.0'
Radial Velocity+924km/s
Magnitude11.8
Distance64 million light yrs.
Group of GalaxiesUrsa Major N Group
Other IDsUGC 6918, CGCG 269-19
MCG +9-20-36, IRAS 11538+5524
PGC 37520
NGC3998 / Galaxy, type SAB(r)b: III
R.A.11h 57m 56.6s (2000.0)
Dec.+55°27' 15" (2000.0)
Apparent Size3.0×2.4'
Radial Velocity+1066km/s
Magnitude11.6
Distance70 million light yrs.
Group of GalaxiesUrsa Major N Group
Other IDsUGC 6946, CGCG 269-25
MCG +9-20-46, PGC 37642
Glaxies around NGC3972
4 digits in image indicate NGC #




NGC3953
NGC4005 Group

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