Deep Sky Object in Winter
Close-up of Horse-head Nebula

Click on image to enlarge

Date & Time: Dec 19 2020, from 21:26 to 22:42 JST(+0900)
Composed 15 shots with 5 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
CMOS Camera: ZWO ASI183MC
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...32bit FITS(2×2 binning), converted to 16bit TIFF(2744×1836)
Device Size...13.2×8.8mm, Gain...400


B33 / Dark Nebula, type 4 Ir
R.A.05h 41m 1.8s (2000.0)
Dec.-02°24' 40" (2000.0)
Apparent Size -
Real SizeN/A
Magnitude -
Distance1300 light yrs.
Other IDsLDN1630
This is a close-up image of the Horse-head Nebula (B33). We can see so-called "bright-rim structure" that a background diffused nebula of IC434 looks a bit brighter around edge of B33.
(An arch light in upper of image is artifact of ζOri)

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