Английская Википедия:54 Cancri
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54 Cancri is a star in the zodiac constellation of Cancer. It has an apparent visual magnitude of 6.38,[1] which places it just below the normal brightness limit of stars visible to the naked eye. The annual parallax shift is 24.79 mas as measured from Earth's orbit, which yields a distance estimate of about 132 light years. It is moving away from the Sun with a radial velocity of +45 km/s.[1]
Measurement of the stars proper motion over time suggest changes due to an acceleration component, which may indicate it is a close binary system.[2] The visible component has a stellar classification of G5 V,[3] indicating it is an ordinary G-type main-sequence star that is generating energy through hydrogen fusion in its core region. Hall et al. (2007) classify it as a low-activity variable star.[3] The star is about five billion years old with a projected rotational velocity of 3.1 km/s. It has 1.23 times the mass of the Sun and 1.81 times the Sun's radius.[1]
References
- Английская Википедия
- G-type main-sequence stars
- Cancer (constellation)
- Durchmusterung objects
- Flamsteed objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Bright Star Catalogue objects
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