NGC 4331 - Irregular Galaxy in Draco
NGC 4331 is a Irregular Galaxy in the Draco constellation. NGC 4331 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.
The image below is a photograph of NGC 4331 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).
Key facts about NGC 4331
NGC 4331 is above the horizon from Greenwich, United Kingdom.
Altitude: 46.5°
Azimuth: 19.7°
Direction: North-North-East
See also NGC 4331 rise and set times.
Given its B magnitude of 14.8, NGC 4331 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.
Photometric information of NGC 4331
The following table lists the magnitude of NGC 4331 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 4331.
Apparent size of NGC 4331
The following table reports NGC 4331 apparent angular size. The green area displayed on top of the DSS2 image of NGC 4331 is a visual representation of it.NGC 4331 - Irregular Galaxy in Draco morphological classification
NGC 4331 - Irregular Galaxy in Draco is classified as Irregular (I) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 4331 - Irregular Galaxy in Draco 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 4331
Celestial coordinates for the J2000 equinox of NGC 4331 are provided in the following table:
The simplified sky charts below show the position of NGC 4331 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 and set times of NGC 4331 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
NGC 4331 - Irregular Galaxy in Draco is circumpolar and transits at 21:17 UTC (altitude: 65.3°)