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🌎 Location: Greenwich, United Kingdom [change]

IC 4931 - Elliptical Galaxy

IC 4931 is a Elliptical Galaxy in the Sagittarius constellation. IC 4931 is situated south of the celestial equator and, as such, it is more easily visible from the southern emisphere.

IC 4931
Galaxy
Sagittarius
  • IC 4931 is below the horizon from Greenwich, United Kingdom [change]. See also rise and set times.
  • Given its B magnitude of 12.82, IC 4931 is visible with the help of a telescope havng an aperture of 10 inches (250mm) or more.
Available Resources for IC 4931 - Elliptical Galaxy

Photometric information of IC 4931

The following table lists the magnitude of IC 4931 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).

12.82
9.62
8.96
8.66

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 4931.

23.57 mag/arcsec2

Apparent size of IC 4931

The following table reports IC 4931 apparent angular size. The green area displayed on top of the DSS2 image of IC 4931 is a visual representation of it.
2.28 arcmin
1.43 arcmin
135°

Digitized Sky Survey image of IC 4931

The image below is a photograph of IC 4931 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 IC 4931 - Elliptical Galaxy star
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DSS2 image of IC 4931 in the Red band. The green region on the image is a representation of the major (2.28 arcmin) and minor (1.43 arcmin) axes of the object's apparent size.

IC 4931 - Elliptical Galaxy morphological classification

IC 4931 - Elliptical Galaxy is classified as Elliptical (E) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 4931 - Elliptical Galaxy in the Hubble de Vaucouleurs sequence.

IC 4931 - Elliptical Galaxy
Visualization of the morphological classification of IC 4931 - Elliptical Galaxy, Elliptical (E).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 4931

Celestial coordinates for the J2000 equinox of IC 4931 are provided in the following table:

20h 00m 50s
-38° 34’ 30”

The simplified sky charts below show the position of IC 4931 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 IC 4931 - Elliptical Galaxy star
Simplified finder chart for IC 4931 - Elliptical Galaxy.

Finder chart IC 4931 - Elliptical Galaxy star
Simplified finder chart for IC 4931 - Elliptical Galaxy.

Rise ans set times of IC 4931 from your location

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

IC 4931 - Elliptical Galaxy is currently not visible from Greenwich, United Kingdom [change]