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


Date & Time: Jan 10 2021, from 23:07 to 24:13 JST(+0900)
Composed 12 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...10×10mm
Sensitivity...ISO4000, White Balance...Daylight


NGC2371 / Planetary Nebula, type IIIa+II
R.A.07h 25m 36.0s (2000.0)
Dec.+29° 29' 00" (2000.0)
Apparent Size0.9'
Real Size1.2 light yrs.
Magnitude13.0
Distance4400 light yrs.
Other IDsPK 189+19.1
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) 2021 by Naoyuki Kurita, All rights reserved.
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