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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny  • Daytime • What's Visible Now?

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Other deep sky objects in Draco
All Constellations »  Draco »  Deep Sky Objects » 

NGC 4331 - Irregular Galaxy in Draco

Altitude: 60.4°   Azimuth: 340.9°   Direction: North-North-West

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.

NGC 4331
Galaxy
Draco

NGC 4331 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 60.4°
Azimuth: 340.9°
Direction: North-North-West

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.

Available Resources for NGC 4331 - Irregular Galaxy in Draco

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).

14.8

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.

23.22 mag/arcsec2

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.
1.58 arcmin
0.37 arcmin
2°

Digitized Sky Survey image of NGC 4331

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).

Image of NGC 4331 - Irregular Galaxy in Draco star
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DSS2 image of NGC 4331 in the Red band. The green region on the image is a representation of the major (1.58 arcmin) and minor (0.37 arcmin) axes of the object's apparent size.

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.

NGC 4331 - Irregular Galaxy in Draco
Visualization of the morphological classification of NGC 4331 - Irregular Galaxy in Draco, Irregular (I).
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:

12h 22m 36s
+76° 10’ 20”

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°.

Finder chart NGC 4331 - Irregular Galaxy in Draco star
Simplified finder chart for NGC 4331 - Irregular Galaxy in Draco.

Finder chart NGC 4331 - Irregular Galaxy in Draco star
Simplified finder chart for NGC 4331 - Irregular Galaxy in Draco.

Rise ans set times of NGC 4331 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

NGC 4331 - Irregular Galaxy in Draco is circumpolar and transits at 07:19 UTC (altitude: 65.3°)