Deep Sky Object in Spring
NGC3166 & NGC3169 (Galaxies in Sextans)


Date & Time: May 4 2018, from 20:14 to 21:03 JST(+0900)
Composed 12 shots with 4 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 & Pictor 201XT
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


NGC3166 / Galaxy, type SAB(rs)0/a
R.A.10h 13m 44.9s (2000.0)
Dec.+03° 25' 31" (2000.0)
Apparent Size4.8×2.4'
Radial Velocity+1127km/s
Magnitude11.3
Distance65 million light yrs.
Group of GalaxiesNGC3166 Group
Other IDsUGC5516, MCG1-26-24
CGCG36-64, PGC29814
NGC3169 / Galaxy, type SA(s)a pec
R.A.10h 14m 14.3s (2000.0)
Dec.+03° 28' 08" (2000.0)
Apparent Size4.4×2.8'
Radial Velocity+1127km/s
Magnitude11.5“™
Distance65 million light yrs.
Group of GalaxiesNGC3166 Group
Other IDsUGC5525, MCG1-26-26
CGCG36-66, PGC29855
These galaxies are a pair lying at northern field of Sextans. A left one(eastern galaxy) is NGC3169 and a right galaxy (western one) is NGC3166, two galaxies are about 7 arc minutes apart. Both galaxies are compact spirals having diameters of 5 arc minutes and 11th magnitude. You can observe those only as very dimmed lumps of light through telescopes. This image shows you a slant dark lane in eastern NGC3169.



Around NGC3158
Around NGC3190

Copyright(c) 2018 by Naoyuki Kurita, All rights reserved.
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