Messier 25 - Open Cluster in Sagittarius
Messier 25 is a Open Cluster in the Sagittarius constellation. Messier 25 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 Messier 25 rise and set times.
Given its visual magnitude of 4.6, Messier 25 is barely visible to the naked eye, easily visible with the help of a small binocular.
Photometric information of Messier 25
The following table lists the magnitude of Messier 25 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 25The following table reports Messier 25 apparent angular size. The green area displayed on top of the DSS2 image of Messier 25 is a visual representation of it.
Digitized Sky Survey image of Messier 25
The image below is a photograph of Messier 25 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 0.47x0.47 degrees (28.2x28.2 arcmins).
Celestial coordinates and finder chart of Messier 25
Celestial coordinates for the J2000 equinox of Messier 25 are provided in the following table:
The simplified sky charts below show the position of Messier 25 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 25 from your location
Today's Messier 25 - Open Cluster in Sagittarius rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):