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


Date & Time: Feb 23 2020, from 20:58 to 22:05 JST(+0900)
Composed 4 min.×15shots & 1min.×5shots
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


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) 2020 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Winter index Monoceros