Deep Sky Object in Autumn
Around Sh2-163 (Diffused Nebulae in Cassiopeia)

Click on image to enlarge

Date & Time: Dec 23 2016, from 20:09 to 21:05 JST(+0900)
Composed 10 shots with 6 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
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX formet (36×24mm)
Sensitivity...ISO3200, White Balance...Daylight

This image has captured minor H-alpha nebulae floating in the Milky Way of western Cassiopeia. The field is equivalent between beta Cas and an major open cluster of M52. Sh2-163 in right hand and SH2-166 in center has sized of about 10 arc minutes. And the brightest one of Sh2-168 in left edge has a span of about 5 arc minutes.

Sh2-163 / Diffused Nebula, type 4 E
R.A.23h 33m 19.4s (2000.0)
Dec.+60°47' 08" (2000.0)
Apparent Size10.0'
Real Size36 light yrs.
Magnitude -
Distance12500 light yrs.
Other IDsLBN 557
Sh2-166 / Diffused Nebula, type 6 E
R.A.23h 42m 10.3s (2000.0)
Dec.+60°58' 16" (2000.0)
Apparent Size10.0'
Real Size22 light yrs.
Magnitude -
Distance7800 light yrs.
Other IDsLBN 566
Sh2-168 / Diffused Nebula, type 3 E
R.A.23h 53m 01.8s (2000.0)
Dec.+60°29' 12" (2000.0)
Apparent Size5.0'
Real Size17 light yrs.
Magnitude -
Distance11600 light yrs.
Other IDsLBN 568



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