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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:58 
Transit: 13:04 
Sunset: 21:09
sunny   (Daytime)   What's Visible Now?
All Constellations »  Tucana »  Deep Sky Objects » 

NGC 231 - Open Cluster in Tucana

Below the horizon.  Never rises today
Altitude: -66.1°   Azimuth: 164.3°   Direction: South-South-East

NGC 231 is a Open Cluster in the Tucana constellation. NGC 231 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere. Given its visual magnitude of 12.87, NGC 231 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 231 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 231 - Open Cluster in Tucana star
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DSS2 image of NGC 231 in the Red band. The green region on the image is a representation of the major (1.8 arcmin) and minor (1.8 arcmin) axes of the object's apparent size.

Apparent Coordinates

00h 42m 01s
-73° 13’ 05”
13h 28m 55s

J2000 Coordinates

00h 41m 06s
-73° 21’ 09”

Finder Chart

The simplified sky charts below show the position of NGC 231 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 231 - Open Cluster in Tucana star
Simplified finder chart for NGC 231 - Open Cluster in Tucana.

Finder chart NGC 231 - Open Cluster in Tucana star
Simplified finder chart for NGC 231 - Open Cluster in Tucana.

Photometric Information

The following table lists the magnitude of NGC 231 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).

13.14
12.87

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

Apparent Size

The following table reports NGC 231 apparent angular size. The green area displayed on top of the DSS2 image of NGC 231 is a visual representation of it.
1.8 arcmin
1.8 arcmin

Rise and Set Times

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

NGC 231 - Open Cluster in Tucana is currently not visible from Greenwich, UK