Gum 15. RCW 32

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This emission nebula is part of a larger HII region, located just 1.5 degrees North of the Vela Supernova Remnant. The bright star in the middle of the nebula is HD 74804, a 9.26 magnitude star, spectral type B3/5II D. The brightest star in the field (lower right) is HD 75081, a 6.14 magnitude star, spectral type B9V C. In this region, three nebula types can be seen: emission (red) reflection (blue) and dark. This image was taken in narrowband (Halpha and OIII) as well as in RGB (in order to better show the reflection nebula).

Additional Information


Name(s): Gum 15. RCW 32

Type: Emission-Reflection-Dark Nebula

RA:  08h 44m 56s

Dec: -41º 17’ 43”

Constellation: Vela

Size (arcmin): 31×22 arcmin

Magnitude: +10.0

Distance: 3,000 ly


Date: 2019-02-21 to 2019-05-12

Location:, SSO near Coonabarabran, NSW Australia

Size (arcmin): 34×34 arcmin

Telescope: 20” f/6.8 Reflector

Camera: SBIG STX16803 (4096x4096pix)

Guiding: Astrodon MonsterMOAG off-axis guider

Total exposure: 16.5 hours (Ha: 6.5h; OIII: 6.5h; RGB: 3.5h)

Processing: CCDStack, Photoshop CC 2020

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