Libra Constellation: Libra, Gliese 581 C, Gliese 581, List of Stars in Libra, Gliese 581 D, Gliese 570, Gliese 581 E, Gliese 581 B

Overview

Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Libra, Gliese 581 C, Gliese 581, List of Stars in Libra, Gliese 581 D, Gliese 570, Gliese 581 E, Gliese 581 B, Alpha Librae, Beta Librae, 23 Librae B, 23 Librae, Hd 141937 B, 23 Librae C, Sigma Librae, Hd 141937, Delta Librae, Gamma Librae, Upsilon Librae, Tau Librae, Zubenhakrabi. Excerpt: Observation data Epoch J2000.0 Equinox...

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Overview

Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Libra, Gliese 581 C, Gliese 581, List of Stars in Libra, Gliese 581 D, Gliese 570, Gliese 581 E, Gliese 581 B, Alpha Librae, Beta Librae, 23 Librae B, 23 Librae, Hd 141937 B, 23 Librae C, Sigma Librae, Hd 141937, Delta Librae, Gamma Librae, Upsilon Librae, Tau Librae, Zubenhakrabi. Excerpt: Observation data Epoch J2000.0 Equinox J2000.0 23 Librae (23 Lib) is a yellow dwarf star in the constellation Libra , and is about 83.7 light-years from the Sun . 23 Lib has a mass of 1.05 suns and a radius of 1.25 suns . Planetary system In 1999 an exoplanet 23 Librae b was announced orbiting 23 Lib, and in 2009 an additional planet was detected. Companion (in order from star): Mass : Semimajor axis (AU ): Orbital period (days ): Eccentricity See also (online edition) References (URLs online) Websites (URLs online) Coordinates : 15 13 28 , 25° 18 33 A hyperlinked version of this chapter is at Extrasolar planet : List of extrasolar planets item Artist's conception of 23 Librae b, as a gas giant. item Parent star item Star : 23 Librae item Constellation : Libra item Right ascension : (): 15 13 28 item Declination : (): 25° 18 33 item Apparent magnitude : ( mV ): 6.45 item Distance : 83.7 ly (25.6 pc ) item Mass : ( m ): 1.05 M item Radius : ( r ): 1.2 R item Temperature : ( T ): 5559 K item Metallicity : : 0.23 item Age : : 7.32 Gyr item Orbital elements item Semimajor axis : ( a ): 0.81 ± 0.02 AU (120 Gm...

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Product Details

  • ISBN-13: 9781155770291
  • Publisher: General Books LLC
  • Publication date: 5/6/2010
  • Pages: 82
  • Product dimensions: 9.00 (w) x 6.00 (h) x 0.20 (d)

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