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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
wb_twilight  • Astronomical Twilight • What's Visible Now
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Other deep sky objects in Pegasus
All Constellations »  Pegasus »  Deep Sky Objects » 

IC 4 - Spiral Galaxy in Pegasus

IC 4 is a Spiral Galaxy in the Pegasus constellation. IC 4 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.

IC 4
Galaxy
Pegasus
  • IC 4 is above the horizon from Greenwich, United Kingdom edit_location_alt. Its current altitude is 1° above the horizon. See also rise and set times.
  • Given its B magnitude of 14.2, IC 4 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.
Available Resources for IC 4 - Spiral Galaxy in Pegasus

Photometric information of IC 4

The following table lists the magnitude of IC 4 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).

14.2
11.51
10.65
10.5

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 4.

23.01 mag/arcsec2

Apparent size of IC 4

The following table reports IC 4 apparent angular size. The green area displayed on top of the DSS2 image of IC 4 is a visual representation of it.
1.17 arcmin
0.84 arcmin
12°

Digitized Sky Survey image of IC 4

The image below is a photograph of IC 4 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 4 - Spiral Galaxy in Pegasus star
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DSS2 image of IC 4 in the Red band. The green region on the image is a representation of the major (1.17 arcmin) and minor (0.84 arcmin) axes of the object's apparent size.

IC 4 - Spiral Galaxy in Pegasus morphological classification

IC 4 - Spiral Galaxy in Pegasus is classified as Spiral (SAc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 4 - Spiral Galaxy in Pegasus in the Hubble de Vaucouleurs sequence.

IC 4 - Spiral Galaxy in Pegasus
Visualization of the morphological classification of IC 4 - Spiral Galaxy in Pegasus, Spiral (SAc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 4

Celestial coordinates for the J2000 equinox of IC 4 are provided in the following table:

00h 13m 27s
+17° 29’ 11”

The simplified sky charts below show the position of IC 4 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 4 - Spiral Galaxy in Pegasus star
Simplified finder chart for IC 4 - Spiral Galaxy in Pegasus.

Finder chart IC 4 - Spiral Galaxy in Pegasus star
Simplified finder chart for IC 4 - Spiral Galaxy in Pegasus.

Rise ans set times of IC 4 from your location

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

Today's IC 4 - Spiral Galaxy in Pegasus rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.5°
Max altitude: 56.0°
Azimuth: 287.5°
IC 4 - Spiral Galaxy in Pegasus is below the horizon from Greenwich, United Kingdom