M57 Ring Nebula

Image information:

Date: 08/14/2007
Equipment: SBIG ST2000XM with CFW8a and Astronomik type 2c LRGB filter set through WO ZS105ED telescope on Losmandy GM8 mount. WO ZS105ED working at f7.
Image type: LRGB
Exposure time: 11X4min Luminance binned 1X1, RG&B 6X3min each binned 2X2.

Object information:

Object designations:

M57, NGC6720, Ring Nebula
Object type:
Planetary nebula
Object size:
1.4' X 1.0'
Constellation: Lyra
M57 is one of the best known planetary nebulae. Ring Nebula is actually shaped like torus, and we look at it down one of its poles. Torus surrounds its central star, which is a planet sized white dwarf. Hot gas near the energizing central star is blue in color, progressively cooler gas at greater distances is green and yellow and the coolest gas along the outer nebula boundary is red. The nebula is more than 1 ly across and 2.3 kly distant.

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