Emission nebula · Cygnus

NGC 6888 Crescent Nebula

Also known as: C27, LBN 203

mag 7.420′ across

About

NGC 6888, the Crescent Nebula, is an emission nebula of magnitude 7.4 in Cygnus, about 20′ across.

NGC 6888 is in the constellation Cygnus.
Best evenings: around early September it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 42° S.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesNot visible to the naked eye.
Binoculars (10×50)A faint glow from a dark site; a nebula filter helps.
Telescope (6–8 inch)A faint glow — a UHC or OIII filter and a dark sky make the difference.

For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.

Designations	NGC 6888, C27, HD 192163, HIP 99546, LBN 203
Type	Emission nebula
Magnitude	7.4The smaller the number, the brighter.
Apparent size	20′ × 10′the full Moon is 31′ across
Constellation	Cygnus
Right ascension (J2000)	20h 12m 06.6s
Declination (J2000)	+38° 21′ 18″