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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: 5:24 
Transit: 12:55 
Sunset: 20:27
sunny   (Daytime)   What's Visible Now?

Other deep sky objects in Cetus

IC 91 - Galaxy in Cetus

Altitude: 40.6°   Azimuth: 169.5°   Direction: South

IC 91 is a Galaxy in the Cetus constellation. IC 91 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 91 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 91 - Galaxy in Cetus star
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DSS2 image of IC 91 in the Red band. The green region on the image is a representation of the major (0.71 arcmin) and minor (0.26 arcmin) axes of the object's apparent size.

Key facts about IC 91

IC 91
Galaxy
Cetus

IC 91 is above the horizon from Greenwich, United Kingdom.

Altitude: 40.6°
Azimuth: 169.5°
Direction: South

See also IC 91 rise and set times.

Given its B magnitude of 16.48, IC 91 is visible only through long exposure photography.

Available Resources for IC 91 - Galaxy in Cetus

Photometric information of IC 91

The following table lists the magnitude of IC 91 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).

16.48
12.91
12.16
11.82

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 91.

24.3 mag/arcsec2

Apparent size of IC 91

The following table reports IC 91 apparent angular size. The green area displayed on top of the DSS2 image of IC 91 is a visual representation of it.
0.71 arcmin
0.26 arcmin
64°

Celestial coordinates and finder chart of IC 91

Celestial coordinates for the J2000 equinox of IC 91 are provided in the following table:

01h 18m 38s
+02° 33’ 13”

The simplified sky charts below show the position of IC 91 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 91 - Galaxy in Cetus star
Simplified finder chart for IC 91 - Galaxy in Cetus.

Finder chart IC 91 - Galaxy in Cetus star
Simplified finder chart for IC 91 - Galaxy in Cetus.

Rise and set times of IC 91 from your location

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

Today's IC 91 - 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: 87.4°
Max altitude: 41.1°
Azimuth: 272.6°