IC 646 - Spiral Galaxy in Ursa Major
IC 646 is a Spiral Galaxy in the Ursa Major constellation. IC 646 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
See also IC 646 rise and set times.
Given its B magnitude of 15.7, IC 646 is visible only through long exposure photography.
Photometric information of IC 646
The following table lists the magnitude of IC 646 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.
The surface brightess reported below is an indication of the brightness per unit of angular area of IC 646.
Apparent size of IC 646The following table reports IC 646 apparent angular size. The green area displayed on top of the DSS2 image of IC 646 is a visual representation of it.
Digitized Sky Survey image of IC 646
The image below is a photograph of IC 646 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 0.5x0.5 degrees (30x30 arcmins).
IC 646 - Spiral Galaxy in Ursa Major morphological classification
IC 646 - Spiral Galaxy in Ursa Major is classified as Spiral (SAa) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 646 - Spiral Galaxy in Ursa Major in the Hubble de Vaucouleurs sequence.
Celestial coordinates and finder chart of IC 646
Celestial coordinates for the J2000 equinox of IC 646 are provided in the following table:
The simplified sky charts below show the position of IC 646 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 IC 646 from your location
IC 646 - Spiral Galaxy in Ursa Major is circumpolar and transits at 06:20 UTC (altitude: 86.0°)