Messier 13 (Hercules Globular Cluster) - Globular Cluster in Hercules
Messier 13 is a Globular Cluster in the Hercules constellation. Messier 13 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Photometric information of Messier 13
The following table lists the magnitude of Messier 13 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 Messier 13The following table reports Messier 13 apparent angular size. The green area displayed on top of the DSS2 image of Messier 13 is a visual representation of it.
Digitized Sky Survey image of Messier 13
The image below is a photograph of Messier 13 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 0.55x0.55 degrees (33x33 arcmins).
Celestial coordinates and finder chart of Messier 13
Celestial coordinates for the J2000 equinox of Messier 13 are provided in the following table:
The simplified sky charts below show the position of Messier 13 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 Messier 13 from your location
Today's Messier 13 (Hercules Globular Cluster) - Globular Cluster in Hercules rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):