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)|
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.
|NGC2371 / Planetary Nebula, type IIIa+II|
|R.A.||07h 25m 36.0s (2000.0)|
|Dec.||+29° 29' 00" (2000.0)|