Deep Sky Object in Summer
NGC5897 (Globular Cluster in Libra)

Date & Time: Mar 4 2017, from 25:52 to 26:14 JST(+0900)
Composed 8 shots with 3 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...ISO6400, White Balance...Daylight

NGC5897 / Globular Cluster, type XI
R.A.15h 17m 24.0s (2000.0)
Dec.-21° 01' 00" (2000.0)
Apparent Size7.3'
Real Size114 light yrs.
Distance45 thousand light yrs.
NGC5897 is a globular cluster about 5 degrees northeast of sigma Librae, a southern star of warped square of Libra. The cluster has an apparent size of 7 arc minutes; can be classed as one of fairly large globular clusters. But unfortunately it's considerably dimmed and has no Messier's number. As this picture shoes you the cluster has very low concentration level. Compact scopes can easily resolve central member stars. And you will be fascinated with the view under high-powered telescopes with about 8-inch aperture or so. Although NGC5897 is not so celebrated, unexpectedly really worth seeing.



Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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