Your guide to the Solar System and the night sky
New! Mars Perseverance Rover Photostream
🌎  Greenwich, United Kingdom [change]

IC 491 - Spiral Galaxy in Cancer

IC 491 is a Spiral Galaxy in the Cancer constellation. IC 491 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.

IC 491
Galaxy
Cancer
  • IC 491 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 64° above the horizon. See also rise and set times.
  • Given its B magnitude of 15.3, IC 491 is visible with the help of a telescope havng an aperture of 20 inches (500mm) or more.
Available Resources for IC 491 - Spiral Galaxy in Cancer

Photometric information of IC 491

The following table lists the magnitude of IC 491 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).

15.3
13.03
12.2
11.92

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 491.

22.72 mag/arcsec2

Apparent size of IC 491

The following table reports IC 491 apparent angular size. The green area displayed on top of the DSS2 image of IC 491 is a visual representation of it.
0.65 arcmin
0.28 arcmin
115°

Digitized Sky Survey image of IC 491

The image below is a photograph of IC 491 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 491 - Spiral Galaxy in Cancer star
/>
DSS2 image of IC 491 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.

IC 491 - Spiral Galaxy in Cancer morphological classification

IC 491 - Spiral Galaxy in Cancer 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 491 - Spiral Galaxy in Cancer in the Hubble de Vaucouleurs sequence.

IC 491 - Spiral Galaxy in Cancer
Visualization of the morphological classification of IC 491 - Spiral Galaxy in Cancer, Spiral (SAc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 491

Celestial coordinates for the J2000 equinox of IC 491 are provided in the following table:

08h 03m 55s
+26° 31’ 14”

The simplified sky charts below show the position of IC 491 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 491 - Spiral Galaxy in Cancer star
Simplified finder chart for IC 491 - Spiral Galaxy in Cancer.

Finder chart IC 491 - Spiral Galaxy in Cancer star
Simplified finder chart for IC 491 - Spiral Galaxy in Cancer.

Rise ans set times of IC 491 from your location

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

Today's IC 491 - Spiral Galaxy in Cancer rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.5°
Max altitude: 65.0°
Azimuth: 296.5°
IC 491 - Spiral Galaxy in Cancer is below the horizon from Greenwich, United Kingdom