IC 4646 - Spiral Galaxy in Ara

IC 4646 is a Spiral Galaxy in the Ara constellation. IC 4646 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere. Given its B magnitude of 12.65, IC 4646 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.

The image below is a photograph of IC 4646 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 4646 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 4646 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 4646.

Apparent Size

The following table reports IC 4646 apparent angular size. The green area displayed on top of the DSS2 image of IC 4646 is a visual representation of it.

Morphological Classification

IC 4646 - Spiral Galaxy in Ara 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 4646 - Spiral Galaxy in Ara in the Hubble de Vaucouleurs sequence.

Rise and Set Times

IC 4646 - Spiral Galaxy in Ara is currently not visible from Greenwich, UK