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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations »  Andromeda »  Deep Sky Objects » 

NGC 818 - Spiral Galaxy in Andromeda

Above the horizon.  Circumpolar today
Alt: 55.72°   Az: 93.04°   Direction: East

NGC 818 is a Spiral Galaxy in the Andromeda constellation. NGC 818 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its B magnitude of 12.7, NGC 818 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.

The image below is a photograph of NGC 818 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 818 - Spiral Galaxy in Andromeda star
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DSS2 image of NGC 818 in the Red band. The green region on the image is a representation of the major (2.2 arcmin) and minor (0.76 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

02h 10m 14s
+38° 53’ 33”
20h 54m 54s
23h 05m 09s

J2000

02h 08m 44s
+38° 46’ 37”

Finder Chart

The simplified sky charts below show the position of NGC 818 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

Finder chart NGC 818 - Spiral Galaxy in Andromeda star
Simplified finder chart for NGC 818 - Spiral Galaxy in Andromeda.

Finder chart NGC 818 - Spiral Galaxy in Andromeda star
Simplified finder chart for NGC 818 - Spiral Galaxy in Andromeda.

Photometric Information

The following table lists the magnitude of NGC 818 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).

12.7
10.37
9.83
9.42

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 818.

22.8 mag/arcsec2

Apparent Size

The following table reports NGC 818 apparent angular size. The green area displayed on top of the DSS2 image of NGC 818 is a visual representation of it.
2.2 arcmin
0.76 arcmin
112°

Morphological Classification

NGC 818 - Spiral Galaxy in Andromeda is classified as Spiral (SAbc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 818 - Spiral Galaxy in Andromeda in the Hubble de Vaucouleurs sequence.

NGC 818 - Spiral Galaxy in Andromeda
Visualization of the morphological classification of NGC 818 - Spiral Galaxy in Andromeda, Spiral (SAbc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Rise and Set Times

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

NGC 818 - Spiral Galaxy in Andromeda is circumpolar and transits at 05:56 UTC (altitude: 77.4°)