Deep Sky Object in Spring
Sh2-290 (Planetary Nebula in Cancer)

Click on image to enlarge

Date & Time: Dec 12 2020, from 27:10 to 29:05 JST(+0900)
Composed 20 shots with 6 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-V4 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
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)
Sensitivity...ISO3200


Sh2-290 / Planetary Nebula, type IIIa
R.A.08h 54m 13.2s (2000.0)
Dec.+08°°53' 59" (2000.0)
Apparent Size16.2'
Real Size22.8 light yrs.
Magnitude12.2
Distance152 light yrs.
Other IDsAbell 31, PK 219+31.1
At the southern region of Cancer, Sh2-290 is a dimmed but fairly larger-scaled planetary nebula positioned at about 3 degrees south of alpha Cnc. We can capture faint figure of the nebula only with a telephoto lenses. This image shows the nebula has a bluish color in central and a reddish region surrounds around it. It's considered that Sh2-290 is one of most ancient and the largest known planetary nebulae, with a real diameter of about a bit smaller than 23 light years.
This image has been cropped with an equivalent focal length of 700mm.



IC972
Sh2-313

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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