IC 4661 - Spiral Galaxy in Apus
IC 4661 is a Spiral Galaxy in the Apus constellation. IC 4661 is situated south of the celestial equator and, as such, it is more easily visible from the southern emisphere.
Photometric information of IC 4661
The following table lists the magnitude of IC 4661 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 4661.
Apparent size of IC 4661The following table reports IC 4661 apparent angular size. The green area displayed on top of the DSS2 image of IC 4661 is a visual representation of it.
Digitized Sky Survey image of IC 4661
The image below is a photograph of IC 4661 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).
IC 4661 - Spiral Galaxy in Apus morphological classification
IC 4661 - Spiral Galaxy in Apus 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 4661 - Spiral Galaxy in Apus in the Hubble de Vaucouleurs sequence.
Celestial coordinates and finder chart of IC 4661
Celestial coordinates for the J2000 equinox of IC 4661 are provided in the following table:
The simplified sky charts below show the position of IC 4661 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.
Rise ans set times of IC 4661 from your location
IC 4661 - Spiral Galaxy in Apus is currently not visible from Greenwich, United Kingdom [change]