NGC 6231 - Open Cluster in Scorpius
NGC 6231 is a Open Cluster in the Scorpius constellation. NGC 6231 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere. Given its visual magnitude of 2.6, NGC 6231 is visible to the naked eye under a clear and dark sky, or with the help of a small binocular.
The image below is a photograph of NGC 6231 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 0.4600x0.4600 degrees (27.60x27.60 arcmins).
Celestial Coordinates
Apparent
J2000
Finder Chart
The simplified sky charts below show the position of NGC 6231 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.
Photometric Information
The following table lists the magnitude of NGC 6231 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).
For more information about photometry in astronomy, check the photometric system article on Wikipedia.
Apparent Size
The following table reports NGC 6231 apparent angular size. The green area displayed on top of the DSS2 image of NGC 6231 is a visual representation of it.Rise and Set Times
Location: Greenwich, UK
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
NGC 6231 - Open Cluster in Scorpius is currently not visible from Greenwich, UK