Deep Sky Object in Winter
Sh2-261 (Diffused Nebula in Orion)


Date & Time: Jan 12 2013, from 25:24 to 25:49 JST(+0900)
Composed 4shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with Astronomik CLS-CCD filter
Auto-guided with TAKAHASHI JP Equatorial &SBIG STV
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO1600




Sh2-261 / Diffused Nebula, type 4 E
R.A.06h 10m (2000.0)
Dec.+15° 35' (2000.0)
Apparent Size50.0×30.0'
Real Size43 light yrs.
Magnitude-
Distance3250 light yrs.
Other IDsLBN863
A dimmed reddish diffused nebula distributed around one degree north of nu Ori, marks a cudgel of Orion, is called Sh2-261. The nebula has approximate sizes of 50 arc minutes in east-west direction and 30 arc minutes in north south, and it has complicated patterns in the oval cloud region. This nebula has an impression like a crushed Rosette nebula in north south direction. It can easily be captured only with small photo lenses because the nebula has enough apparent size. In spite of its fairly noticeable appearance, the nebula has no number of NGC nor IC catalogues. Many major star charts have forgotten to include the shape of the nebula, so it's a deep sky object to which many amateur astrophotographers do not give an attention.




Sh2-253

Sh2-263, Sh2-265


Copyright(c) 2013 by Naoyuki Kurita, All rights reserved.
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