NGC 5139 (Omega Centauri) - Globular Cluster in Centaurus
NGC 5139 is a Globular Cluster in the Centaurus constellation. NGC 5139 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere.
See also NGC 5139 rise and set times.
Given its visual magnitude of 5.33, NGC 5139 is barely visible to the naked eye, easily visible with the help of a small binocular.
Photometric information of NGC 5139
The following table lists the magnitude of NGC 5139 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 of NGC 5139The following table reports NGC 5139 apparent angular size. The green area displayed on top of the DSS2 image of NGC 5139 is a visual representation of it.
Digitized Sky Survey image of NGC 5139
The image below is a photograph of NGC 5139 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 0.9x0.9 degrees (54x54 arcmins).
Celestial coordinates and finder chart of NGC 5139
Celestial coordinates for the J2000 equinox of NGC 5139 are provided in the following table:
The simplified sky charts below show the position of NGC 5139 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.