menu
A Complete Guide to the Solar System and the Night Sky
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
Timezone: Europe/London
Sunrise: 5:05 
Transit: 12:56 
Sunset: 20:48
warning Set your observing location to get relevant data
wb_twilight   (Astronomical Twilight)  
Planets Visible Tonight
Planets Visible Tonight
 • 
What's Visible Now • Tonight Sky
Search  close

In Evidence

New Comet C/2025 J1 (Borisov) Discovered in May 2025
Detailed information about the discovery of Comet C/2025 J1 (Borisov) and pointers to useful resources to track and observe it. Read more...

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

IC 1931 - Galaxy in Taurus

Below the horizon.  Rise: 6:37 | Tran: 12:44 | Set: 18:51
Alt: -32.99°   Az: 331.25°   Direction: North-North-West

IC 1931 is a Galaxy in the Taurus constellation. IC 1931 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its B magnitude of 15.5, IC 1931 is visible only through long exposure photography.

The image below is a photograph of IC 1931 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 0.5000x0.5000 degrees (30.00x30.00 arcmins).

Image of IC 1931 - Galaxy in Taurus star
/>
DSS2 image of IC 1931 in the Red band. The green region on the image is a representation of the major (0.8 arcmin) and minor (0.76 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

03h 30m 16s
+01° 50’ 12”
10h 24m 46s
13h 55m 03s

J2000

03h 28m 58s
+01° 45’ 02”

Finder Chart

The simplified sky charts below show the position of IC 1931 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

loader
  Loading map...
Finder chart for IC 1931 - Galaxy in Taurus.

loader
  Loading map...
Finder chart for IC 1931 - Galaxy in Taurus.

Photometric Information

The following table lists the magnitude of IC 1931 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).

15.5
12.37
11.55
11.71

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 IC 1931.

23.77 mag/arcsec2

Apparent Size

The following table reports IC 1931 apparent angular size. The green area displayed on top of the DSS2 image of IC 1931 is a visual representation of it.
0.8 arcmin
0.76 arcmin
78°

Rise and Set Times

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

Today's IC 1931 - Galaxy in Taurus rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.2°
Max altitude: 40.4°
Azimuth: 271.8°