Messier 39 - Open Cluster in Cygnus
Messier 39 is a Open Cluster in the Cygnus constellation. Messier 39 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
- Messier 39 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 10° above the horizon. See also rise and set times.
- Given its visual magnitude of 4.6, Messier 39 is barely visible to the naked eye, easily visible with the help of a small binocular.
Photometric information of Messier 39
The following table lists the magnitude of Messier 39 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 39The following table reports Messier 39 apparent angular size. The green area displayed on top of the DSS2 image of Messier 39 is a visual representation of it.
Digitized Sky Survey image of Messier 39
The image below is a photograph of Messier 39 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 0.65x0.65 degrees (39x39 arcmins).
Celestial coordinates and finder chart of Messier 39
Celestial coordinates for the J2000 equinox of Messier 39 are provided in the following table:
The simplified sky charts below show the position of Messier 39 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 39 from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Messier 39 - Open Cluster in Cygnus is circumpolar and transits at 09:21 UTC (altitude: 87.0°)