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In Evidence

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Other deep sky objects in Ursa Minor
All Constellations »  Ursa Minor »  Deep Sky Objects » 

IC 1139 - Galaxy in Ursa Minor

Above the horizon.  Circumpolar today
Alt: 55.63°   Az: 349.45°   Direction: North

IC 1139 is a Galaxy in the Ursa Minor constellation. IC 1139 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Given its B magnitude of 15.6, IC 1139 is visible only through long exposure photography.

The image below is a photograph of IC 1139 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 1139 - Galaxy in Ursa Minor star
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DSS2 image of IC 1139 in the Red band. The green region on the image is a representation of the major (0.65 arcmin) and minor (0.28 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

15h 27m 19s
+82° 29’ 49”
03h 29m 13s
18h 56m 33s

J2000

15h 29m 26s
+82° 35’ 01”

Finder Chart

The simplified sky charts below show the position of IC 1139 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

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Finder chart for IC 1139 - Galaxy in Ursa Minor.

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Finder chart for IC 1139 - Galaxy in Ursa Minor.

Photometric Information

The following table lists the magnitude of IC 1139 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).

15.6
12.52
11.82
11.54

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 1139.

23.51 mag/arcsec2

Apparent Size

The following table reports IC 1139 apparent angular size. The green area displayed on top of the DSS2 image of IC 1139 is a visual representation of it.
0.65 arcmin
0.28 arcmin
54°

Rise and Set Times

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

IC 1139 - Galaxy in Ursa Minor is circumpolar and transits at 23:39 UTC (altitude: 59.0°)