Deep Sky Object in Spring
NGC4527, NGC4536 (Galaxies in Virgo)


Click on image to enlarge

Date & Time: Dec 17 2023, from 28:19 to 29:14 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



NGC4527 / Galaxy, type SAB(s)bc
R.A.12h 34m 08.8s (2000.0)
Dec.+02°39' 13" (2000.0)
Apparent Size6.9×2.4'
Radial Velocity+1727km/s
Magnitude10.4
Distance49 million light yrs.
Group of GalaxiesVirgo II - M61 Group
Other IDsUGC 7721, CGCG 42-156
MCG +1-32-101, IRAS 12315+255
PGC 41789
NGC4536 / Galaxy, type SAB(rs)bc I-II
R.A.12h 34m 26.9s (2000.0)
Dec.+02° 11' 19" (2000.0)
Apparent Size7.6×3.2'
Radial Velocity+2140km/s
Magnitude10.9
Distance55 million light yrs.
Group of GalaxiesVirgo II - M61 Group
Other IDsUGC7732, MCG0-32-23
CGCG14-68, PGC41823
It is a pair of spiral galaxies arranged at intervals of 30 arc minutes in the north-south direction. They located approximately 4.5 degrees NNW of γVir (Porrima), around the southern edge of the Virgo Cluster. The northern galaxy, NGC4527, has an elliptical shape with a major axis of about 7 arc minutes and a brightness of 10th magnitude. It lacks a clear spiral structure, and complex dark bands surround its central bulge.
The southern galaxy, NGC4536, has a slightly larger major axis of about 7 arc minutes and is a faint galaxy with a brightness of 11th magnitude. Two arms can be observed, seemingly stretched out. Morphologically, it is classified as an intermediate between spiral and barred galaxy. Although it is sufficiently large, its low surface brightness makes it quite challenging to perceive its shape visually as seen in this image.




NGC4526, NGC4535

NGC4567 & NGC4568


Copyright(c) 2023 by Naoyuki Kurita, All rights reserved.
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