Basic object information
Name: NGC 6888
Popular name: Crescent Nebula
Type of object: Bright nebula
Magnitude: 10.0
Size: 20.0'x10.0'
Object classification: E
Description: F,vL,vmE,** att
Notes: H IV 72;Crescent Neb;Wolf-Rayet * invl

Catalog position for epoch J2000.0
Right ascension: 20h 12m 48.0s
Declination: +38 19' 00"

Constellation: Cygnus

Observer: Iiro Sairanen
Obs. place: Ahola, Joutseno, Finland
Date/Time: 18/19.10.2003 22:20

Telescope: 16" Dobson f 4.5

Magn: 146x

Filter: O-III

Field: 12'

NE Lim.mag: 6.2

Background sky: 3

Seeing: 3

Height: 55
Visuality: II

Weather: weak northern lights, 47% moon has just risen, -2.5C

Much larger than I expected. Southern parts are out of the field because of too high magnification. A huge crescent shape is easily seen and two smooth spots are apart of the main nebula. Few stars are involved within the nebula. O-III filter helps a lot.

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