NGC 1791 - Open Cluster in Mensa
NGC 1791 is a Open Cluster in the Mensa constellation. NGC 1791 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere.
See also NGC 1791 rise and set times.
Given its visual magnitude of 13.12, NGC 1791 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.
Photometric information of NGC 1791
The following table lists the magnitude of NGC 1791 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 1791The following table reports NGC 1791 apparent angular size. The green area displayed on top of the DSS2 image of NGC 1791 is a visual representation of it.
Digitized Sky Survey image of NGC 1791
The image below is a photograph of NGC 1791 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 0.5x0.5 degrees (30x30 arcmins).
Celestial coordinates and finder chart of NGC 1791
Celestial coordinates for the J2000 equinox of NGC 1791 are provided in the following table:
The simplified sky charts below show the position of NGC 1791 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.