Messier 81 (Bode's Galaxy) - Spiral Galaxy
Messier 81 is a Spiral Galaxy in the Ursa Major constellation. Messier 81 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.
Photometric information of Messier 81
The following table lists the magnitude of Messier 81 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 Messier 81.
Apparent size of Messier 81The following table reports Messier 81 apparent angular size. The green area displayed on top of the DSS2 image of Messier 81 is a visual representation of it.
Digitized Sky Survey image of Messier 81
The image below is a photograph of Messier 81 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 0.721x0.721 degrees (43.26x43.26 arcmins).
Messier 81 (Bode's Galaxy) - Spiral Galaxy morphological classification
Messier 81 (Bode's Galaxy) - Spiral Galaxy is classified as Spiral (SAab) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of Messier 81 (Bode's Galaxy) - Spiral Galaxy in the Hubble de Vaucouleurs sequence.
Celestial coordinates and finder chart of Messier 81
Celestial coordinates for the J2000 equinox of Messier 81 are provided in the following table:
The simplified sky charts below show the position of Messier 81 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 81 from your location
Messier 81 (Bode's Galaxy) - Spiral Galaxy is circumpolar and transits at 12:22 UTC (altitude: 72.4°)