Spiral galaxy · Andromeda

NGC 891

Also known as: C23

mag 10.013′ across

About

NGC 891 is a spiral galaxy of magnitude 10.0 in Andromeda, about 13′ across.

NGC 891 is in the constellation Andromeda.
Best evenings: around mid-December 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 38° 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)Too faint for binoculars.
Telescope (6–8 inch)A thin spindle of light, sometimes with a dark dust lane along it.

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

Designations	NGC 891, C23, PGC 9031, UGC 1831
Type	Spiral galaxy (Sb)
Magnitude	10.0The smaller the number, the brighter.
Apparent size	13′ × 3′position angle 22°; the full Moon is 31′ across
Surface brightness	24.2 mag/arcsec²Average over its disc, in the blue band: the lower the number, the easier it is to see.
Constellation	Andromeda
Right ascension (J2000)	02h 22m 33.4s
Declination (J2000)	+42° 20′ 57″