NGC6888 NGC 6888, known as the Crescent Nebula for its…
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NGC6888
NGC 6888, known as the Crescent Nebula for its shape evoking that famous Viennese pastry, is an emission nebula in the constellation Cygnus. At its heart lies WR 136 (HD 192163), a Wolf-Rayet star whose intense UV radiation ionises the surrounding gas, which re-emits that energy as visible light — much like a neon sign the size of a solar system.
The nebula itself was sculpted by the collision between WR 136's current fast stellar wind and the slower wind it had ejected during an earlier phase of its life — a cosmic rear-end collision frozen in glowing gas. The expansion velocity of the shell, measured at \~85 km/s, gives a rough age of 250,000 years: a geological eyeblink, but a significant fraction of the star's remaining lifetime.
Constellation : Cygnus
Center RA : 20h 12' 23".539
Center Dec : 38d 23' 22.78"
Field of View : 42'43.7" x 1º15'57.8"
Inclination : approx -0.140º from north axis
Instrument : Seestar S50 dual band filter (brottle8)
Date : May - June 2026 (4 night)
Exposure : 1919 exposure of 20 second each
Processing: Pixinsight, Starnet, NoisXTerminator on starless image, HOO palette
Finition : Affinity Photo (saturation,vibrance,curve on starless-recombination with star mask)
#space
NGC 6888, known as the Crescent Nebula for its shape evoking that famous Viennese pastry, is an emission nebula in the constellation Cygnus. At its heart lies WR 136 (HD 192163), a Wolf-Rayet star whose intense UV radiation ionises the surrounding gas, which re-emits that energy as visible light — much like a neon sign the size of a solar system.
The nebula itself was sculpted by the collision between WR 136's current fast stellar wind and the slower wind it had ejected during an earlier phase of its life — a cosmic rear-end collision frozen in glowing gas. The expansion velocity of the shell, measured at \~85 km/s, gives a rough age of 250,000 years: a geological eyeblink, but a significant fraction of the star's remaining lifetime.
Constellation : Cygnus
Center RA : 20h 12' 23".539
Center Dec : 38d 23' 22.78"
Field of View : 42'43.7" x 1º15'57.8"
Inclination : approx -0.140º from north axis
Instrument : Seestar S50 dual band filter (brottle8)
Date : May - June 2026 (4 night)
Exposure : 1919 exposure of 20 second each
Processing: Pixinsight, Starnet, NoisXTerminator on starless image, HOO palette
Finition : Affinity Photo (saturation,vibrance,curve on starless-recombination with star mask)
#space
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