Deep Sky Object in Winter
Sh2-253 (Diffused Nebula in Gemini)

Click on image to enlarge

Date & Time: Dec 27 2019, from 23:45 to 24:41 JST(+0900)
Composed 12 shots with 5 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)
Device Size...35×24mm, Sensitivity...ISO3200


Sh2-253/ Diffused Nebula
R.A.06h 25m 40.5s (2000.0)
Dec.+20°00' 46" (2000.0)
Apparent Size5.0'
Real Size12 light yrs.
Magnitude -
Distance8500 light yrs.
Other IDs-
A minor emission nebula of Sh2-253 is lying 50 arc minutes west of a 4th star (ν Gem) seen in left hand side of the image at the western edge of Gemini, near a boundary on Orion. We can find the nebula at about 3 degrees south of a unique-shaped H-alpha nebula of the Jerry-fish nebula (IC443) at the leg of Castor. Sh2-253 has a size of only 5 arc minutes at most, moreover the nebula is extraordinary dimmed. It's not a striking target for telescope-aided observation.
This image has been cropped with a focal length of 700mm.



Sh2-250, Sh2-251
Sh2-260, Sh2-262

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