Deep Sky Object in Winter
NGC2371 (Dogborn Nebula in Gemini)

Date & Time: Jan 29 2011, from 19:28 to 19:40 JST(+0900)
Composed 2shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain (f=2500mm, F10.0)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D700
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(2784×1848)
Device Size...DX Format (24×16mm)
CCD Sensitivity...ISO3200

NGC2371 / Planetary Nebula, type IIIa+II
R.A.07h 25m 36.0s (2000.0)
Dec.+29° 29' 00" (2000.0)
Apparent Size0.9'
Real SizeN/A
NGC2371, The Dogborn Nebula, is a very tiny planetary nebula squeezed between Castor and Pollux in the constellation of Gemini. The nebula has a brightness of 13th magnitude and a diameter of only 0.9-arc minute. You might need a fairly large-sized telescope with a magnifying power over 100 to see it. A long exposed image shows you a bit bright central nucleus and an asymmetric rounded structure that surrounds the nucleus. Same as many other planetary nebulae, this NGC2371 is an appearance of a dead star with its matter gushed out in space.

NGC2264 & Corn Nebula

Eskimo Nebula(NGC2392)

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