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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:59 
Transit: 13:04 
Sunset: 21:08
sunny   (Daytime)   What's Visible Now?
All Constellations »  Cygnus »  Deep Sky Objects » 

Messier 39 - Open Cluster in Cygnus

Above the horizon.  Circumpolar today
Alt: 10.03°   Az: 0.88°   Direction: North

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. 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.

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 0.6500x0.6500 degrees (39.00x39.00 arcmins).

Image of Messier 39 - Open Cluster in Cygnus star
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DSS2 image of Messier 39 in the Red band. The green region on the image is a representation of the major (19.5 arcmin) and minor (19.5 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

21h 32m 41s
+48° 32’ 50”
12h 05m 15s

J2000

21h 31m 48s
+48° 26’ 17”

Finder Chart

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°.

Finder chart Messier 39 - Open Cluster in Cygnus star
Simplified finder chart for Messier 39 - Open Cluster in Cygnus.

Finder chart Messier 39 - Open Cluster in Cygnus star
Simplified finder chart for Messier 39 - Open Cluster in Cygnus.

Photometric Information

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).

4.66
4.6

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

Apparent Size

The 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.
19.5 arcmin
19.5 arcmin

Rise and Set Times

Location: Greenwich, UK
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Messier 39 - Open Cluster in Cygnus is circumpolar and transits at 02:02 UTC (altitude: 87.1°)