IC 5148, also called the Spare Tire Nebula, is a small (2 arcmin) and faint planetary nebula in the constellation Grus. This nebula has beautiful colors that can be shown with narrowband images. Interesting is the presence of a very faint, but visible, halo around the nebula. This halo is visible in the larger image, but it is more clearly seen in the negative image above.
Additional Information
Object
Name(s): IC 5148, Spare Tire Nebula
Type: Planetary Nebula
RA: 21h 59m 30.4s
Dec: -39º 22’ 38.3”
Constellation: Grus
Size (arcmin): 2×2
Magnitude: +11
Distance: 3,000 ly
Image
Date: 2015 October-November
Location: iTelescope.net, SSO near Coonabarabran, NSW Australia
Size (arcmin): 24×21
Telescope: Planewave CDK 20” f/6.8
Camera: SBIG STX16803 (4096x4096pix)
Guiding: Astrodon MonsterMOAG off-axis guider
Total exposure: 18.5 hours (Halpha: 8.5hs; OIII: 8.5hs, RGB: 1.5hs)
Processing: CCDStack, Photoshop CC 2016