Deep Sky Object in Summer
M39 (Open Cluster in Cygnus)

Click on image to enlarge

Date & Time: Nov 19 2023, from 20:14 to 20:50 JST(+0900)
Composed 10 shots with 4 minutes exposed
Optical: APM 15cm(6.0") ED refractor with conversion lens (f=850mm, F5.6)
with IDAS LPS-V4 Light-pollution suppression filter
Auto-guided with Losmandy G11 Equatorial & ZWO ASI183MC + PHD2
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device size...36×24mm, Sensitivity...ISO1600


M39 (NGC7092) / Open Cluster, type e, III 2 m
R.A.21h 32m 11.9s (2000.0)
Dec.+48° 26' 00" (2000.0)
Apparent Size30'
Real Size7 light yrs.
# of Stars30
Magnitude5.2
Distance810 light yrs.
M39 is an open cluster about 7 degrees north-east of North American Nebula (NGC7000). You can find the cluster just in the Milky Way between the tail of Cygnus and Cassiopeia, there are plenty of faint stars that form the autumnal Milky Way around this field. M39 is large and scattered, telescope is unsuitable for appreciating that, and you should need a small binocular. About 20 faint stars with about 7th magnitude are forming a rough triangle. The cluster is about 810 light years away.



M29
NGC6124

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