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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations »  Cetus »  Deep Sky Objects » 

IC 138 - Intermediate Spiral Galaxy in Cetus

Above the horizon.  Rise: 0:45 | Tran: 6:44 | Set: 12:39
Alt: 26.59°   Az: 130.29°   Direction: South-East

IC 138 is a Intermediate Spiral Galaxy in the Cetus constellation. IC 138 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 14.9, IC 138 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

The image below is a photograph of IC 138 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 138 - Intermediate Spiral Galaxy in Cetus star
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DSS2 image of IC 138 in the Red band. The green region on the image is a representation of the major (1.12 arcmin) and minor (0.74 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

01h 34m 17s
-00° 33’ 51”
21h 07m 57s
22h 42m 14s

J2000

01h 33m 02s
-00° 41’ 22”

Finder Chart

The simplified sky charts below show the position of IC 138 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 138 - Intermediate Spiral Galaxy in Cetus star
Simplified finder chart for IC 138 - Intermediate Spiral Galaxy in Cetus.

Finder chart IC 138 - Intermediate Spiral Galaxy in Cetus star
Simplified finder chart for IC 138 - Intermediate Spiral Galaxy in Cetus.

Photometric Information

The following table lists the magnitude of IC 138 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).

14.9
11.9
11.18
10.98

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 138.

23.37 mag/arcsec2

Apparent Size

The following table reports IC 138 apparent angular size. The green area displayed on top of the DSS2 image of IC 138 is a visual representation of it.
1.12 arcmin
0.74 arcmin
23°

Morphological Classification

IC 138 - Intermediate Spiral Galaxy in Cetus is classified as Intermediate Spiral (SABc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 138 - Intermediate Spiral Galaxy in Cetus in the Hubble de Vaucouleurs sequence.

IC 138 - Intermediate Spiral Galaxy in Cetus
Visualization of the morphological classification of IC 138 - Intermediate Spiral Galaxy in Cetus, Intermediate Spiral (SABc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Rise and Set Times

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

Today's IC 138 - Intermediate Spiral Galaxy in Cetus rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.6°
Max altitude: 38.0°
Azimuth: 269.4°