Deep Sky Object in Spring
M48 (Open Cluster in Hydra)

Date & Time: Dec 20 2014, from 26:30 to 26:50 JST(+0900)
Composed 5 shots with 4 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Nikon D700
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(2784×1848)
Device Size...DX Format (24mm×16mm)
Sensitivity...ISO1600, White Balance...Daylight

M48 (NGC2548) / Open Cluster, type f, I 3 r
R.A.08h 13m 48.0s (2000.0)
Dec.-05° 48' 00" (2000.0)
Apparent Size30.0'
Real Size27 light yrs.
# of Stars80
Distance3090 light yrs.
M48 (NGC2548) is a medium-sized open cluster at the western-edge of Hydra closing to Monoceros.
The cluster contains about 80 fine stars, has a diameter of about 30 arc minutes, almost same as that of full-moon. You can perfectly resolve individual stars only with the portable binoculars, and enjoy various stellar series through small scopes. The distance from the solar system is estimated around 3000 light years.

M44(The Praesepe)


Copyright(c) 2015 by Naoyuki Kurita, All rights reserved.
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