Astronomy and Space

Epsilon Boötis

Epsilon Boötis is a binary star system in the northern constellation of Boötes. The two components have the proper names Izar (, EYE-zar) and Pulcherrima () respectively; both are traditional names for the system. The star system can be viewed with the unaided eye at night, but resolving the pair with a small telescope is challenging; an aperture of 76 mm (3.0 in) or greater is required. Based on parallax measurements, it is located at a distance of 236 light-years (72 pc). The system is drifting closer to the Sun with a radial velocity of −16 km/s.

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See also

• ▸Alternative fuel
• ▸470 BC
• ▸2MV

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