Cl399 (Brocchi's Cluster) - Association of Stars in Vulpecula
Cl399 is a Association of Stars in the Vulpecula constellation. Cl399 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 Cl399 rise and set times.
Given its visual magnitude of 3.6, Cl399 is barely visible to the naked eye, easily visible with the help of a small binocular.
Photometric information of Cl399
The following table lists the magnitude of Cl399 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 Cl399The following table reports Cl399 apparent angular size. The green area displayed on top of the DSS2 image of Cl399 is a visual representation of it.
Digitized Sky Survey image of Cl399
The image below is a photograph of Cl399 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 2.3333333333333x2.3333333333333 degrees (140x140 arcmins).
Celestial coordinates and finder chart of Cl399
Celestial coordinates for the J2000 equinox of Cl399 are provided in the following table:
The simplified sky charts below show the position of Cl399 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 Cl399 from your location
Today's Cl399 (Brocchi's Cluster) - Association of Stars in Vulpecula rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):