Tarf - β Cancri (beta Cancri)
Tarf, also designated as β Cancri (beta Cancri), is a variable and double giant star in the constellation of Cancer.
Tarf visual magnitude is 3.52. Because of its moderate brightness, Tarf should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about Tarf:
Celestial coordinates and finder chart of Tarf
Tarf is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Tarf are provided in the following table:
The simplified sky map below shows the position of Tarf in the sky:
Visibility of Tarf from your location
Digitized Sky Survey image of Tarf
The image below is a photograph of Tarf 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). The proper motion of Tarf is -0.044 arcsec per year in Right Ascension and -0.049 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Tarf from the Sun and relative movement
Tarf is distant 290.29 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.
Spectral properties of Tarf
Tarf belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where Tarf is situated in the Hertzsprung–Russell diagram.
Tarf star system properties
Tarf is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Tarf double sysyem: