NGC 4644 - Spiral Galaxy in Ursa Major
NGC 4644 is a Spiral Galaxy in the Ursa Major constellation. NGC 4644 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
- NGC 4644 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 17° above the horizon. See also rise and set times.
- Given its B magnitude of 14.8, NGC 4644 is visible with the help of a telescope havng an aperture of 20 inches (500mm) or more.
Photometric information of NGC 4644
The following table lists the magnitude of NGC 4644 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 NGC 4644.
Apparent size of NGC 4644The following table reports NGC 4644 apparent angular size. The green area displayed on top of the DSS2 image of NGC 4644 is a visual representation of it.
Digitized Sky Survey image of NGC 4644
The image below is a photograph of NGC 4644 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).
NGC 4644 - Spiral Galaxy in Ursa Major morphological classification
NGC 4644 - Spiral Galaxy in Ursa Major is classified as Spiral (SAb) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 4644 - Spiral Galaxy in Ursa Major in the Hubble de Vaucouleurs sequence.
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY
Celestial coordinates and finder chart of NGC 4644
Celestial coordinates for the J2000 equinox of NGC 4644 are provided in the following table:
The simplified sky charts below show the position of NGC 4644 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 NGC 4644 from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
NGC 4644 - Spiral Galaxy in Ursa Major is circumpolar and transits at 00:06 UTC (altitude: 86.3°)