Menkalinan

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Double star
Menkalinan (β Aurigae)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Carter
Right ascension 05 h 59 m 32 s
declination + 44 ° 56 ′ 51 ″
Apparent brightness 1.90 (1.89 to 1.98) mag
Typing
B − V color index (+0.03) 
U − B color index (+0.04) 
R − I index (−0.01) 
Spectral class A2 IV + A2 IV-V
Variable star type EA / DM 
Astrometry
Radial velocity (−15.75 ± 0.62) km / s
parallax (40.21 ± 0.23)  mas
distance (81 ± 1)  ly
(25)  pc
Visual absolute brightness M vis (0.54 ± 0.10 / 0.70 ± 0.10) mag
Proper movement 
Rec. Share: (−56.44 ± 0.25)  mas / a
Dec. portion: (−0.95 ± 0.11)  mas / a
Physical Properties
Dimensions (2.39 ± 0.01 / 2.33 ± 0.01)  M ☉
radius (2.77 ± 0.03 / 2.63 ± 0.03)  R ☉
Luminosity

(52 ± 6/45 ± 5)  L ☉

Effective temperature (9350 ± 200/9200 ± 200)  K.
Age (570) mill.  A
Other names
and catalog entries
Bayer name β Aurigae
Flamsteed name 34 Aurigae
Bonn survey BD +44 1328
Bright Star Catalog HR 2088 [1]
Henry Draper Catalog HD 40183 [2]
Hipparcos catalog HIP 28360 [3]
SAO catalog SAO 40750 [4]
Tycho catalog TYC 2924-2742-1 [5]
2MASS catalog 2MASS J05593172 + 4456508 [6]
Other names FK5 227

Menkalinan ( Arabic : "shoulder of the one who holds the reins") is the name of the star β Aurigae (Beta Aurigae). The striking pentagon of the constellation Fuhrmann stands in Central Europe on winter evenings near the zenith, β is its second brightest star, about 6 ° east of the sparkling Capella .

Menkalinan is an eclipsing star of the Algol type , the brightness of which fluctuates between + 1.89 mag and + 1.98 mag with a period of 3.96 days. It was the second double star discovered by means of spectroscopy (see spectroscopic double star ). Both stars of Menkalinan belong to the spectral class A2. The system is about 80 light years away. Other spellings are Menkalinam, Menkarlinan, Menkarlina and Menkalina.

The star belongs to the so-called Bear Current , a loose cluster of about 150 stars distributed over half the sky, the brightest of which form the Big Dipper constellation . Our solar system is on the edge of this group, but is moving in a completely different direction.

See also

Web links

Individual evidence

  1. ↑ a b c d e f g h bet Aur. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 4, 2018 .
  2. ↑ a b c bet Aur. In: VSX. AAVSO, accessed September 4, 2018 .
  3. ↑ a b c d e B. Nordstrom, KT Johansen: Radii and masses for beta Aurigae . In: Astronomy & Astrophysics . 291, No. 3, 1994, pp. 777-785. bibcode : 1994A & A ... 291..777N .
  4. Jump up ↑ Bradford B. Behr, Andrew T. Cenko, Arsen R. Hajian, Robert S. McMillan, Marc Murison, Jeff Meade, Robert Hindsley: Stellar Astrophysics with a Dispersed Fourier Transform Spectrograph. II. Orbits of Double-lined Spectroscopic Binaries . In: The Astronomical Journal . 142, No. 1, July 2011, p. 6. arxiv : 1104.1447 . bibcode : 2011AJ .... 142 .... 6B . doi : 10.1088 / 0004-6256 / 142/1/6 .