Deep Sky Object in Winter
Red Rectangle (Planetary Nebula in Monoceros)

Date & Time: Nov 23 2008, from 24:56 to 25:26 JST(+0900)
Composed 4 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D50 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1600

Red Rectangle / Emission Nebula, type R bipolar
R.A.06h 19m 58.1s (2000.0)
Dec.-10° 38' 14" (2000.0)
Apparent Size4.0×3.0"
Real SizeN/A
Magnitude -
Distance2300 light yrs.
Other IDs -
This image has captured a tiny celestial object near a boundary between Monoceros and Canis Major. This object has been classified as an emission nebula with a size of only 4 arc seconds, but it's considered that the nebula is a "Proto-Planetary Nebula" just started to release gaseous matters from a dead star. It was discovered in 1973 so registered in no any object catalogues. We have a nickname of "Red Rectangle" from its shape and unique color, became comparatively popular object after the Hubble Space Telescope (HST) captured its detailed and marvelous image.

Gum Nebula

Around Taurus Molecular Cloud

Copyright(c) 2009 by Naoyuki Kurita, All rights reserved.
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