Libra Beta

Libra beta star [1] Beta Librae
Temporary mark, another name	Re-ズベン S head [2], Zubeneschamali[3][4]
Constellation	Libra
Apparent magnitude (V)	2.62[1]
Position Epoch: J2000.0[1]
Right ascension (RA,α)	15h 17m 00.41382s [1]
Declination (Dec,δ)	-09° 22′ 58.4919″[1]
Red shift	-0.000119[1]
Radial velocity (Rv)	-35.60km/s [1]
Proper motion (μ)	Right ascension: -98.10 milliseconds / year [1] Declination: -19.65 milliseconds / year [1]
Annual parallax (π)	17.62+-0.16 milliseconds [1]
Distance	185.02 +-1.70 light-year [note 1] (56.75+-0.52 parsec) [note 1]
Absolute magnitude (MV)	-1.150[note 2]
Physical property
Radius	4.9R☉[5]
Mass	3.5 (3.8-3.3) M☉[6]
Rotation speed	250km/s [7]
Spectral class	B8 V[1][6]
The intensity of light	130 L☉
Surface temperature	12,300K[8]
Color index (B-V)	-0.106[9]
Color index (U-B)	-0.359[9]
Color index (R-I)	-0.10[10]
Quantity of metal [Fe/H]	0.33dex[6]
Age	80 million (130,000,000-40,000,000) a year [6]
The other name
The other name	Lanx Borealis Libra 27th star [1] BD-08 3935 [1] FK5 564 [1], HD 135742 [1] HIP 74785 [1], HR 5685 [1] SAO 140430 [1]
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A Libra beta star (てんびんざ beta result) is a third class star at the brightest fixed star in Libra.

On this record of wins and losses of two big; is characteristic, and one is what was reported when the green star and the expressed thing, other were brighter once than Antares [¹¹].

Table of contents

Summary

It is supposed parallax to be 185 light-year the distance from the earth [¹²]. The high temperature of this record of wins and losses generates the light of the simple spectrum and is ideal though I investigate gas and the dust between the star between the earth and this star. Like similar many stars, I turn at high speed and am rotation speed more than 100 times of the sun [⁷]. The angular diameter of the main star was measured with 0.801 milliseconds [⁸].

The periodic small strange light of this record of wins and losses suggests the existence of the subordinate star which cannot observe from the direct earth [¹³];, on the other hand, is classified in the single star currently [¹⁴].

Characteristic

Color of the star

This kind of star looks usually pale, but this star is often expressed with green, and is a fixed star of the only green that this is seen by the naked eye [¹¹]; [¹⁵].

Brightness

According to Eratosthenes, this star is observed if more spirited than Antares, and Ptolemy 350 years later does it with the brightness that is about the same as Antares [¹¹]. R.H. Allen supposes that Antares might do 増光 about this discrepancy [¹¹]. This record of wins and losses might dim, but does only the strange light of the 0.03 class now [¹⁶].

Name

βLib /βLibrae. ズベン S head re-[²] (Zubeneschamali^[3][4]) of the inherent name ([ˌzuːbənˌɛʃəˈmeɪli]) Oh, I assume الزبنالشمالية(al-zuban al-šamāliyya) meaning "a north nail" in Arabic an origin [¹⁶]. On August 21, 2016, the working group (Working Group on Star Names, WGSN) about the naming of the fixed star of International Astronomical Union approved Zubeneschamali as the inherent name of the Libra beta star formally [⁴].

I might be called Lanx Borealis^[17] which meant "a north (the balance) plate" in Latin once.

Footnote

[Help]

Explanatory note

1. The ^ ^{a b} parsec calculates calculation (as for the error, like), light-year than parsec *3.26 than 1/ annual parallax (second). Each effective figure decimal second place
2. ^ apparent magnitude +5 + 5* log (annual parallax (second)) I calculate more. The effective figure decimal third place

Source

1. ^ ^{a b c d e f g h i j k l m n o p q r} "SIMBAD Astronomical Database". Results for bet Lib - - Variable Star. June 16, 2014 reading.
2. Revised edition fourth impression, page 129 redecorated on ^ ^{a b} Megumi Hara "meaning 恒星社厚生閣 of history of myth - constellation and Hoshina of the constellation", February 28, 2007. ISBN 978-4-7699-0825-8。
3. ^ ^{a b} Paul Kunitzsch; Tim Smart (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations. Sky Pub. Corp.. p. 43. ISBN 978-1 - 931,559-44-7. 
4. ^ ^{a b c} "IAU Catalog of Star Names". International Astronomical Union. October 9, 2016 reading.
5. ^ Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3 ed.), Birkhäuser, ISBN 3540296921, http://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41. The radius (R*) is given by:

   ${\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(56.8\cdot 0.801\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 9.8\cdot R_{\bigodot }\end{aligned}}}$ 

6. ^ ^{a b c d} Janson, Markus et al. (August 2011), "High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood," it is The Astrophysical Journal 736 (2): 89, arXiv: 1105.2577, Bibcode 2011ApJ...736...89J, doi: 10.1088/0004-637X/736/2/89 
7. ^ ^{a b} Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars," it is The Astrophysical Journal 573 (1): 359–365, Bibcode 2002ApJ...573..359A, doi: 10.1086/340590 
8. ^ ^{a b} Zorec, J. et al. (July 2009), "Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ_1, D) parameters into Teff," it is Astronomy and Astrophysics 501 (1): 297–320, Bibcode 2009A&A...501..297Z, doi: 10.1051/0004-6361/200811147 
9. ^ ^{a b} Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association," it is Astrophysical Journal Supplement 15:459, Bibcode 1968ApJS...15..459G, doi: 10.1086/190168 
10. ^ 輝星星表第 five
11. ^ ^{a b c d} Robert Barr Nam Jr. It is person from ground book building, 951 pages "a star all sorts of subject size encyclopedia" (revised edition). ISBN 4-8052-0266-1. 
12. ^ van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction." Astronomy and Astrophysics 474 (2): 653–664. arXiv: 0708.1752. Bibcode 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. 
13. It is read ^ Mark Fisher (1999-2006), "Zuben Elschemali" on The Electronic Sky, http://www.glyphweb.com/esky/stars/zubenelschemali.html January 25, 2009. 
14. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems." Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. arXiv: 0806.2878. Bibcode 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. 
15. ^ Kaler, James B. (2006)It is read, "Zubeneschamali" on Stars (University of Illinois), http://stars.astro.illinois.edu/sow/zubenes.html July 3, 2006. 
16. It is read ^ ^{a b} AAS (2006), "LIBRA - A Balanced View" (page 7 of PDF) on Auckland Astronomical Society, http://www.astronomy.org.nz/Documents/Journal/journal_200606.pdf January 25, 2009. 
17. ^ La Hire, Philippe (1727), Tabulae Astronomicae, http://www.archive.org/stream/tabulaeastronom00suntgoog#page/n146/mode/2up, see star table, page 13.

Outside link

• Libra Beta - Wikisky: DSS2、SDSS、GALEX、IRAS、Hα、X-rays、Astrophotograph、Heavenly bodies map、An article and photograph
• It is read Odeh, Moh'd (1998-2006), "Arabic Star Names" on Islamic Crescents' Observation Project, http://www.icoproject.org/star.html July 3, 2006.  –Find more Arabic Star Names and their meanings.
• Wielen, R. et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions, Astronomisches Rechen-Institut Heidelberg, Bibcode 1999VeARI..35....1W. 

Coordinate:   It is -09 degrees 22' 58.4919 for 17m 00.41382^s for 15h″

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