IC 721 - Galaxy in Crater
IC 721 is a Galaxy in the Crater constellation. IC 721 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.
The image below is a photograph of IC 721 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 721
IC 721 is above the horizon from Greenwich, United Kingdom.
Altitude: 29.5°
Azimuth: 191.7°
Direction: South-South-West
See also IC 721 rise and set times.
Given its B magnitude of 15.5, IC 721 is visible only through long exposure photography.
Photometric information of IC 721
The following table lists the magnitude of IC 721 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 721.
Apparent size of IC 721
The following table reports IC 721 apparent angular size. The green area displayed on top of the DSS2 image of IC 721 is a visual representation of it.IC 721 - Galaxy in Crater morphological classification
IC 721 - Galaxy in Crater is classified as according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 721 - Galaxy in Crater 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 721
Celestial coordinates for the J2000 equinox of IC 721 are provided in the following table:
The simplified sky charts below show the position of IC 721 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 721 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
Today's IC 721 - Galaxy in Crater rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):