HR 4796 [SEP] constellation
HR 4796
HR 4796 is a binary star system in the southern constellation of Centaurus. Parallax measurements put it at a distance of from the Earth. The two components of this system have an angular separation of 7.7 arcseconds, which, at their estimated distance, is equivalent to a projected separation of about 560 Astronomical Units (AU), or 560 times the separation of the Earth from the Sun. The star and its ring resemble an eye, and it is sometimes known by the nickname "Sauron's Eye".
of HR 4796B. 
Kinematics.
The space velocity of HR 4796 in the Galactic coordinate system is = . This trajectory and the location of the system suggests that it may be a member of the TW Hydrae association of stars that share a common origin. A low-mass member of this association, identified as 2MASS J12354893−3950245, may be a tertiary component of the HR 4796 system. It has a proper motion matching HR 4796, suggesting it is gravitationally bound to the other two stars, and is separated from the pair