Deep Sky Object in Winter
Horse head Nebula (B&W wide field)

Click on image to enlarge

Date & Time: Dec 4 2010, from 25:26 to 26:04 JST(+0900)
Composed 4shots with 12 minutes exposed
Optical: PENTAX 7.5cm(2.9") ED refractor with a conversion lens (f=360mm, F4.8)
with IDAS LPS-V4 Light-pollution suppression 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)
CCD Sensitivity...ISO1600


This is another Horse head Nebula image captured wider field than one in previous page. I have picked up only red channel of color image to show you distribution of dimmed nebulosities clearly.
You can see black shadow of the horse head with its head turning right. To be precise, the dark nebula that forms the head of horse has been registered as B33, and a diffused nebula in background has a number of IC434. To say, B33 is thrusting its head into IC434 from the direction of east. And this image tells us that IC434 is spread out toward far west (right in this image) from the Horse head Nebula, the whole of the diffused nebula has a round shape with a diameter of about 2 degrees or so.

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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
IC434 / Diffused Nebula, type 1 E
R.A.05h 41m 0.0s (2000.0)
Dec.-02° 24' 00" (2000.0)
Apparent Size60×10'
Real Size22.7×3.8 light yrs.
Magnitude -
Distance1300 light yrs.
Other IDsLBN954
NGC2024 / Diffused Nebula, type 1 E
R.A.05h 41m 54.0s (2000.0)
Dec.-01° 51' 00" (2000.0)
Apparent Size30'
Real Size11 light yrs.
Magnitude -
Distance1300 light yrs.
Other IDsSh2-277



NGC2022
Monkey Nebula(NGC2174-5)

Copyright(c) 2011 by Naoyuki Kurita, All rights reserved.
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