Deep Sky Object in Summer
Draco Dwarf (Galaxy in Draco)

Click on image to enlarge

Date & Time: Apr 8 2022, from 25:22 to 26:45 JST(+0900)
Composed 11 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -20°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


Draco Dwarf / Galaxy, type E pec
R.A.17h 20m 07.7s (2000.0)
Dec.+57°54' 58" (2000.0)
Apparent Size35.5×24.5'
Radial Velocity-281km/s
Magnitude10.9
Distance260 thousand light yrs.
Group og GalaxiesLocal Group
Other IDsUGC 10822, CGCG 300-12
MCG +10-25-8, DDO 208
PGC 60095
This image shows you a vast but extraordinary faint dwarf galaxy lying at 5 degrees west of xi Dra at the head of Draco. This is one of companion galaxies of our Galaxy, floating at only 260 thousand light years away. Although the galaxy has an apparent span of over 30 arc minutes, amateur telescopes are needed a long-exposed photographing to detect the vague figure somehow.
It is considered that the Draco Dwarf includes the most massive dark matter in all known galaxies. Astronomical attention has been paid on this dwarf elliptical galaxy.



Tadpole galaxy(UGC10214)
Arp101

Copyright(c) 2022 by Naoyuki Kurita, All rights reserved.
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