Deep Sky Object in Spring
Around NGC3447 (Galaxies in Leo)


Date & Time: Mar 9 2024, from 21:44 to 22:39 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression 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


Within the body of Leo, located 5.2 degrees northwest of θleo, are galaxies forming a small galaxy group. The largest among them is NGC3447 visible in the lower right of the image, classified as a spiral galaxy with indistinct structure. Its size is approximately 3.5 arc minutes, with the companion galaxy NGC3447A positioned just to the east. Separated 35 arc minutes north of NGC3447 are two spiral galaxies NGC3454 and NGC3455. These galaxies float at a distance of 40 to 60 million light-years. Additionally, just east of NGC 3447 lies the galaxy cluster Abell 1126, situated much farther at a distance of 750 million light-years.
Numbers with 4 digits represent NGC #
NGC3444 / Galaxy, type SAB(s)m pec
R.A.10h 53m 24.1s (2000.0)
Dec.+16°46' 19" (2000.0)
Apparent Size3.5×1.9'
Radial Velocity+1048km/s
Magnitude13.1
Distance44 million light yrs.
Group of GalaxiesNGC3370 Group
Other IDsUGC 6006, CGCG 95-58
MCG +3-28-27, IRAS 10507+1702
PGC 32694
NGC3454 / Galaxy, type SB(s)c? sp
R.A.10h 54m 29.4s (2000.0)
Dec.+17°20' 38" (2000.0)
Apparent Size2.6×0.4'
Radial Velocity+1153km/s
Magnitude14.2
Distance63 million light yrs.
Group of GalaxiesNGC3370 Group
Other IDsUGC 6026, CGCG 95-60
MCG +3-28-30, PGC 32763
NGC3455 / Galaxy, type (R')SAB(rs)b
R.A.10h 54m 31.1s (2000.0)
Dec.+17°17' 04" (2000.0)
Apparent Size2.6×2.0'
Radial Velocity+1113km/s
Magnitude12.8
Distance65 million light yrs.
Group of GalaxiesNGC3370 Group
Other IDsUGC 6028, CGCG 95-62
MCG +3-28-31, IRAS 10518+1733
PGC 32767



NGC3395, NGC3396
NGC3511, NGC3513

Copyright(c) 2024 by Naoyuki Kurita, All rights reserved.
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