Messier 33 (Triangulum Galaxy) - Spiral Galaxy
Messier 33 is a Spiral Galaxy in the Triangulum constellation. Messier 33 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Photometric information of Messier 33
The following table lists the magnitude of Messier 33 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 33.
Apparent size of Messier 33The following table reports Messier 33 apparent angular size. The green area displayed on top of the DSS2 image of Messier 33 is a visual representation of it.
Digitized Sky Survey image of Messier 33
The image below is a photograph of Messier 33 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 2.0696666666667x2.0696666666667 degrees (124.18x124.18 arcmins).
Messier 33 (Triangulum Galaxy) - Spiral Galaxy morphological classification
Messier 33 (Triangulum Galaxy) - Spiral Galaxy is classified as Spiral (SAc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of Messier 33 (Triangulum Galaxy) - Spiral Galaxy in the Hubble de Vaucouleurs sequence.
Celestial coordinates and finder chart of Messier 33
Celestial coordinates for the J2000 equinox of Messier 33 are provided in the following table:
The simplified sky charts below show the position of Messier 33 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.