NGC 6939 - Open Cluster in Cepheus
NGC 6939 is a Open Cluster in the Cepheus constellation. NGC 6939 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.
The image below is a photograph of NGC 6939 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 0.4x0.4 degrees (24x24 arcmins).
Key facts about NGC 6939
NGC 6939 is above the horizon from Greenwich, United Kingdom.
Altitude: 66.2°
Azimuth: 51.7°
Direction: North-East
See also NGC 6939 rise and set times.
Given its visual magnitude of 7.8, NGC 6939 is visible with the help of a binocular with a 40-50mm aperture or a small telescope.
Photometric information of NGC 6939
The following table lists the magnitude of NGC 6939 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 NGC 6939
The following table reports NGC 6939 apparent angular size. The green area displayed on top of the DSS2 image of NGC 6939 is a visual representation of it.Celestial coordinates and finder chart of NGC 6939
Celestial coordinates for the J2000 equinox of NGC 6939 are provided in the following table:
The simplified sky charts below show the position of NGC 6939 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 and set times of NGC 6939 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
NGC 6939 - Open Cluster in Cepheus is circumpolar and transits at 05:41 UTC (altitude: 80.8°)