Deep Sky Object in Winter
Gum Nebula (Supernova Remnant in Puppis & Vela)


Date & Time: Dec 20 2014, from 26:49 to 27:18 JST(+0900)
Composed 10shots with 3 minutes exposed
Optical: SIGMA 18-35mm F1.8 DC HSM (f=35mm, F2.8)
with Astronomik CLS-CCD filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO800




Gum Nebula / Supernova Remnant
R.A.08h 34m (around center)
Dec.-45° 00' (around center)
Apparent Size40×90°
Real Size950 light yrs.
Magnitude -
Distance1500 light yrs.(center)
300 light yrs.(closest region)
In lower southern sky in winter night, an extraordinary vast but dimmed gGum Nebulah is spreading out with a size of 40×90 degrees. The nebula is positioned in the Milky Way of Puppis to Vela. The nebula with name of an astronomer, who investigated about the nebula, is considered a supernova remnant exploded about from 10 to 30 thousand years ago. In Japan, I can capture images of only northern part of Gum Nebula, but its low altitude of meridian transit make difficult to take pictures of the nebula clearly.
This image shows you a limited area of Gum Nebula around the border of Puppis and Vela, equivalent a part of northeast region. A circular nebulosity in center has an ID of Gum17. The Gum Nebula has been grouped into some regions and assigned ID numbers because it's too large to regard as single celestial object. Its whole figure has ring structure, looks like a swollen Veil Nebula in Cygnus.


To Monochrome emphasized image (109KB)

Constellations around Gum Nebula Constellations around Gum Nebula




Medusa Nebula

Red Rectangle


Copyright(c) 2015 by Naoyuki Kurita, All rights reserved.
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