DeepSky Object in Spring
Around NGC3684 (Galaxies in Leo)


Date & Time: May 3 2022, from 20:19 to 21:14 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


This image shows you three paralleling small galaxies in eastern region of Leo, about 6 degrees WNW of Denebola. They has numbers of NGC3686, NGC3684 and NGC3681 from upper right, respectively. All galaxies are spirals, having brightness of 12th magnitude and sizes of 2 or 3 arc minutes. The larger one of NGC3686 can be seen clear arms in this image.

NGC3681 / Galaxy, type SAB(r)bc I-II
R.A.11h 26m 29.4s (2000.0)
Dec.+16° 51' 51" (2000.0)
Apparent Size2.5×2.0'
Radial Velocity+991km/s
Magnitude12.4
Distance75 million light yrs.
Group of GalaxiesNGC3607 Group
Other IDsUGC6445, MCG3-29-48
CGCG96-45, PGC35193
NGC3684 / Galaxy, type SA(rs)bc II-III
R.A.11h 27m 11.1s (2000.0)
Dec.+17° 01' 48" (2000.0)
Apparent Size3.0×2.1'
Radial Velocity+991km/s
Magnitude12.2
Distance75 million light yrs.
Group of GalaxiesNGC3607 Group
Other IDsUGC6453, MCG3-29-50
CGCG96-47, PGC35224
NGC3686 / Galaxy, type SB(s)bc II
R.A.11h 27m 44.1s (2000.0)
Dec.+17° 13' 25" (2000.0)
Apparent Size3.2×2.5'
Radial Velocity+991km/s
Magnitude11.8
Distance75 million light yrs.
Group of GalaxiesNGC3607 Group
Other IDsUGC6460, MCG3-29-51
CGCG96-49, PGC35268



NGC3672
NGC3705

Copyright(c) 2022 by Naoyuki Kurita, All rights reserved.
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