Deep Sky Object in Autumn
IC1805 (Diffused Nebula in Cassiopeia)


Click on image to enlarge

Date & Time: Dec 23 2016, from 21:24 to 23:16 JST(+0900)
Mosaic of 2 flames of 6min.×8shots
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



IC1805 / Diffused Nebula, type 3 E
R.A.02h 32m 42.0s (2000.0)
Dec.+61° 27' 00" (2000.0)
Apparent Size50×44'
Real Size37×32 light yrs.
Magnitude -
Distance2500 light yrs.
Other IDsSh2-190, LBN654
There are many gaseous regions and star clusters around the Milky Way flowing from Cepheus, Cassiopeia to Perseus. This attractive reddish nebula, IC1805, is unfortunately invisible with our eyes, but very photogenic and one of the largest ones around this field. The nebula has a span of about one-degree, floating 2500 light years away.
IC1805 shows us a bit warped heart-shape. You can see a small and bright region in the upper right-hand side, which has an another number of NGC1795. And the nebula has a neighbor of IC1848 at just east, this couple can be captured with medium-ranged telephoto lenses.

To Wide-field image around IC1805 & IC1848(913KB)




IC1470

IC1848


Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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