IC 4640 - Intermediate Spiral Galaxy in Apus
IC 4640 is a Intermediate Spiral Galaxy in the Apus constellation. IC 4640 is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere.
The image below is a photograph of IC 4640 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).
Key facts about IC 4640
IC 4640 is below the horizon from Greenwich, United Kingdom.
Altitude: -45.5°
Azimuth: 168.0°
Direction: South-South-East
See also IC 4640 rise and set times.
Given its B magnitude of 14.78, IC 4640 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.
Photometric information of IC 4640
The following table lists the magnitude of IC 4640 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.
Apparent size of IC 4640
The following table reports IC 4640 apparent angular size. The green area displayed on top of the DSS2 image of IC 4640 is a visual representation of it.IC 4640 - Intermediate Spiral Galaxy in Apus morphological classification
IC 4640 - Intermediate Spiral Galaxy in Apus is classified as Intermediate Spiral (SABc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 4640 - Intermediate Spiral Galaxy in Apus in the Hubble de Vaucouleurs sequence.
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY
Celestial coordinates and finder chart of IC 4640
Celestial coordinates for the J2000 equinox of IC 4640 are provided in the following table:
The simplified sky charts below show the position of IC 4640 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 and set times of IC 4640 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
IC 4640 - Intermediate Spiral Galaxy in Apus is currently not visible from Greenwich, United Kingdom