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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

Tarf - β Cancri (beta Cancri)

Below the horizon.  Rise: 8:38 | Tran: 15:23 | Set: 22:07
Altitude: -25.2°   Azimuth: 28.9°   Direction: North-North-East

Tarf, also designated as β Cancri (beta Cancri), is a variable and double giant star of spectral class K4 in the constellation of Cancer.

Tarf visual magnitude is 3.52. Because of its moderate brightness, Tarf is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Celestial coordinates and finder chart of Tarf

Finder chart Tarf - β Cancri (beta Cancri) star
Simplified finder chart for Tarf - β Cancri (beta Cancri).

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:

08h 16m 30s
+09° 11’ 08”
Image of Tarf - β Cancri (beta Cancri) star
DSS2 image of Tarf. The red arrow shows the motion of Tarf during the next 10000 years (-7.33 arcmin in Right Ascension and -8.17 arcmin in declination);

Key facts about Tarf


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.

HR Diagram
H-R diagram showing the position of Tarf. Attribution: Richard Powell / CC BY-SA

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:

29.2 arcsec

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.

89.05 pc
290.29 ly
22 km/s
-0.044 arcsec/year
-0.049 arcsec/year

Alternative designations of Tarf

β Cancri
(beta Cancri)

Visibility of Tarf from your location

Today's Tarf - β Cancri (beta Cancri) rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 80.8°
Max altitude: 47.7°
Azimuth: 279.2°