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public  Greenwich, UK Greenwich, UK  ⓘ
Timezone: Europe/London
Sunrise: 5:06 
Transit: 12:56 
Sunset: 20:47
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In Evidence

New Comet C/2025 J1 (Borisov) Discovered in May 2025
Detailed information about the discovery of Comet C/2025 J1 (Borisov) and pointers to useful resources to track and observe it. Read more...

Other deep sky objects in Andromeda
All Constellations »  Andromeda »  Deep Sky Objects » 

NGC 81 - Galaxy in Andromeda

Above the horizon.  Rise: 1:38 | Tran: 9:41 | Set: 17:44
Alt: 35.99°   Az: 261.25°   Direction: West

NGC 81 is a Galaxy in the Andromeda constellation. NGC 81 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its B magnitude of 17.74, NGC 81 is visible only through long exposure photography.

The image below is a photograph of NGC 81 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5000x0.5000 degrees (30.00x30.00 arcmins).

Image of NGC 81 - Galaxy in Andromeda star
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DSS2 image of NGC 81 in the Red band. The green region on the image is a representation of the major (0.41 arcmin) and minor (0.3 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

00h 22m 32s
+22° 31’ 24”
03h 59m 53s
04h 22m 25s

J2000

00h 21m 12s
+22° 22’ 58”

Finder Chart

The simplified sky charts below show the position of NGC 81 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

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Finder chart for NGC 81 - Galaxy in Andromeda.

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Finder chart for NGC 81 - Galaxy in Andromeda.

Photometric Information

The following table lists the magnitude of NGC 81 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).

17.74
12.87
12.17
11.93

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

The surface brightess reported below is an indication of the brightness per unit of angular area of NGC 81.

23.25 mag/arcsec2

Apparent Size

The following table reports NGC 81 apparent angular size. The green area displayed on top of the DSS2 image of NGC 81 is a visual representation of it.
0.41 arcmin
0.3 arcmin
88°

Rise and Set Times

Location: Greenwich, UK
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's NGC 81 - Galaxy in Andromeda rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 67.5°
Max altitude: 61.0°
Azimuth: 292.5°