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A Complete Guide to the Solar System and the Night Sky
FAQ
FAQ
public Location: Greenwich, United Kingdom
Timezone: Europe/London
Sunrise: 5:26 
Transit: 12:55 
Sunset: 20:25
sunny   (Daytime)   What's Visible Now?

Other deep sky objects in Cetus

IC 23 - Elliptical Galaxy in Cetus

Altitude: 2.0°   Azimuth: 246.6°   Direction: West-South-West

IC 23 is a Elliptical Galaxy in the Cetus constellation. IC 23 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 23 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 23 - Elliptical Galaxy in Cetus star
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DSS2 image of IC 23 in the Red band. The green region on the image is a representation of the major (0.85 arcmin) and minor (0.77 arcmin) axes of the object's apparent size.

Key facts about IC 23

IC 23
Galaxy
Cetus

IC 23 is above the horizon from Greenwich, United Kingdom.

Altitude: 2.0°
Azimuth: 246.6°
Direction: West-South-West

See also IC 23 rise and set times.

Given its B magnitude of 15.06, IC 23 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

Available Resources for IC 23 - Elliptical Galaxy in Cetus

Photometric information of IC 23

The following table lists the magnitude of IC 23 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).

15.06
11.75
11.23
10.95

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 23.

23.52 mag/arcsec2

Apparent size of IC 23

The following table reports IC 23 apparent angular size. The green area displayed on top of the DSS2 image of IC 23 is a visual representation of it.
0.85 arcmin
0.77 arcmin
20°

IC 23 - Elliptical Galaxy in Cetus morphological classification

IC 23 - Elliptical 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 23 - Elliptical Galaxy in Cetus in the Hubble de Vaucouleurs sequence.

IC 23 - Elliptical Galaxy in Cetus
Visualization of the morphological classification of IC 23 - Elliptical Galaxy in Cetus, Elliptical (E).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 23

Celestial coordinates for the J2000 equinox of IC 23 are provided in the following table:

00h 30m 51s
-12° 43’ 13”

The simplified sky charts below show the position of IC 23 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 23 - Elliptical Galaxy in Cetus star
Simplified finder chart for IC 23 - Elliptical Galaxy in Cetus.

Finder chart IC 23 - Elliptical Galaxy in Cetus star
Simplified finder chart for IC 23 - Elliptical Galaxy in Cetus.

Rise and set times of IC 23 from your location

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

Today's IC 23 - Elliptical Galaxy in Cetus rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.7°
Max altitude: 25.8°
Azimuth: 257.3°