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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:00 
Transit: 13:04 
Sunset: 21:07
sunny   (Daytime)   What's Visible Now?
All Constellations »  Andromeda »  Deep Sky Objects » 

NGC 23 - Spiral Galaxy in Andromeda

Above the horizon.  Rise: 21:04 | Tran: 5:37 | Set: 14:05
Alt: 35.17°   Az: 268.73°   Direction: West

NGC 23 is a Spiral Galaxy in the Andromeda constellation. NGC 23 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its B magnitude of 12.5, NGC 23 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 23 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 23 - Spiral Galaxy in Andromeda star
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DSS2 image of NGC 23 in the Red band. The green region on the image is a representation of the major (1.55 arcmin) and minor (1.22 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

00h 11m 09s
+26° 03’ 36”
04h 21m 53s
04h 33m 02s

J2000

00h 09m 52s
+25° 55’ 25”

Finder Chart

The simplified sky charts below show the position of NGC 23 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 23 - Spiral Galaxy in Andromeda star
Simplified finder chart for NGC 23 - Spiral Galaxy in Andromeda.

Finder chart NGC 23 - Spiral Galaxy in Andromeda star
Simplified finder chart for NGC 23 - Spiral Galaxy in Andromeda.

Photometric Information

The following table lists the magnitude of NGC 23 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).

12.5
9.91
9.21
8.88

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 23.

22.41 mag/arcsec2

Apparent Size

The following table reports NGC 23 apparent angular size. The green area displayed on top of the DSS2 image of NGC 23 is a visual representation of it.
1.55 arcmin
1.22 arcmin
175°

Morphological Classification

NGC 23 - Spiral Galaxy in Andromeda is classified as Spiral (SAa) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 23 - Spiral Galaxy in Andromeda in the Hubble de Vaucouleurs sequence.

NGC 23 - Spiral Galaxy in Andromeda
Visualization of the morphological classification of NGC 23 - Spiral Galaxy in Andromeda, Spiral (SAa).
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

Today's NGC 23 - Spiral Galaxy in Andromeda rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.9°
Max altitude: 64.6°
Azimuth: 296.1°