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. 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.
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 0.5000x0.5000 degrees (30.00x30.00 arcmins).
Celestial Coordinates
Apparent
J2000
Finder Chart
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°.
Photometric Information
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).
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.
Apparent Size
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.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.
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 4 - Spiral Galaxy in Pegasus rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):