We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

IC 81 - Elliptical (E?) Galaxy in Cetus

Below the horizon.  Rise: 2:23 | Tran: 8:13 | Set: 14:02
Altitude: -39.2°   Azimuth: 344.6°   Direction: North-North-West

IC 81 is a Elliptical (E?) Galaxy in the Cetus constellation. IC 81 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.

The image below is a photograph of IC 81 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 81 - Elliptical (E?) Galaxy in Cetus star
/>
DSS2 image of IC 81 in the Red band. The green region on the image is a representation of the major (1.17 arcmin) and minor (0.91 arcmin) axes of the object's apparent size.

Key facts about IC 81

IC 81
Galaxy
Cetus

IC 81 is below the horizon from Greenwich, UK.

Altitude: -39.2°
Azimuth: 344.6°
Direction: North-North-West

See also IC 81 rise and set times.

Given its B magnitude of 14.8, IC 81 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

Available Resources for IC 81 - Elliptical (E?) Galaxy in Cetus

Photometric information of IC 81

The following table lists the magnitude of IC 81 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
11.4
10.71
10.44

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 81.

23.57 mag/arcsec2

Apparent size of IC 81

The following table reports IC 81 apparent angular size. The green area displayed on top of the DSS2 image of IC 81 is a visual representation of it.
1.17 arcmin
0.91 arcmin
145°

IC 81 - Elliptical (E?) Galaxy in Cetus morphological classification

IC 81 - Elliptical (E?) Galaxy in Cetus 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 81 - Elliptical (E?) Galaxy in Cetus in the Hubble de Vaucouleurs sequence.

IC 81 - Elliptical (E?) Galaxy in Cetus
Visualization of the morphological classification of IC 81 - Elliptical (E?) Galaxy in Cetus, Elliptical (E?).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 81

Celestial coordinates for the J2000 equinox of IC 81 are provided in the following table:

01h 09m 21s
-01° 41’ 44”

The simplified sky charts below show the position of IC 81 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 81 - Elliptical (E?) Galaxy in Cetus star
Simplified finder chart for IC 81 - Elliptical (E?) Galaxy in Cetus.

Finder chart IC 81 - Elliptical (E?) Galaxy in Cetus star
Simplified finder chart for IC 81 - Elliptical (E?) Galaxy in Cetus.

Rise and set times of IC 81 from your location

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

Today's IC 81 - Elliptical (E?) Galaxy in Cetus rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 91.7°
Max altitude: 36.8°
Azimuth: 268.3°