Deep Sky Object in Autumn
Sh2-181 & Sh2-182 (Diffused Nebulae in Cassiopeia)

Click on image to enlarge

Date & Time: Oct 21 2023, from 24:48 to 26:00 JST(+0900)
Composed 10 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with 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

Sh2-181 / Diffused Nebula, type 6 R
R.A.00h 49m 16.6s (2000.0)
Dec.+65°12' 43" (2000.0)
Apparent Size15.0×8.0'
Real Size28×15 light yrs.
Magnitude -
Distance6500 light yrs.
Other IDsLBN 614
Sh2-182 / Reflection Nebula, type R
R.A.00h 50m 11.8s (2000.0)
Dec.+64°45' 46" (2000.0)
Apparent Size2.0'
Real Size6 light yrs.
Magnitude -
Distance11000 light yrs.
This is a faint Hα emission nebula and a reflection nebula located approximately 4.5 degrees north of γ Cassiopeiae. The faint, red Hα emission nebula situated upper part of the frame is known as Sh2-181 and has a size of about 15 arc minutes. Its elongated shape in the north-south direction can be barely discerned. About 26 arc minutes south of Sh2-181, there is a smaller reflection nebula, Sh2-182, with a size of approximately 2 arc minutes. In the upper left corner of the frame, in the northeast part of Sh2-181, you can detect an even fainter Hα region extending.
Objects around Sh2-181, 182 Objects around Sh2-181, 182

Around Sh2-176


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