IC 4791 - Galaxy in Hercules
IC 4791 is a Galaxy in the Hercules constellation. IC 4791 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year.
See also IC 4791 rise and set times.
Given its B magnitude of 14.01, IC 4791 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.
Photometric information of IC 4791
The following table lists the magnitude of IC 4791 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.
The surface brightess reported below is an indication of the brightness per unit of angular area of IC 4791.
Apparent size of IC 4791The following table reports IC 4791 apparent angular size. The green area displayed on top of the DSS2 image of IC 4791 is a visual representation of it.
Digitized Sky Survey image of IC 4791
The image below is a photograph of IC 4791 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 IC 4791
Celestial coordinates for the J2000 equinox of IC 4791 are provided in the following table:
The simplified sky charts below show the position of IC 4791 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.
Rise ans set times of IC 4791 from your location
Today's IC 4791 - Galaxy in Hercules rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):