Minkar

Bayer name	ε Corvi
Flamsteed name	2 Corvi
Bonn survey	BD -21 ° 3487
Bright Star Catalog	HR 4630 [1]
Henry Draper Catalog	HD 105707 [2]
Hipparcos catalog	HIP 59316 [3]
SAO catalog	SAO 180531 [4]
Tycho catalog	TYC 6668-992-1 [5]
2MASS catalog	2MASS J12100748-2237109 [6]
Other names	FK5 453

Epsilon Corvi (ε Corvi ) is a star of the spectral class K2 III. His proper name is Minkar . It is located in the constellation Raven and has an apparent magnitude of +3.0 mag. With a diameter of 43 times the sun, Minkar is one of the red-orange giant stars . Its distance from Earth is about 260 light years or 80 parsec .

nomenclature

Minkar (from the arab. منقار minqār ) is the proper name of the star and translated means beak (of the raven).

properties

Epsilon Corvi is a star of the spectral class K2 III. It is a red-orange giant star. It has almost used up its hydrogen supply for nuclear fusion. As a result, its outer sheaths have expanded significantly. It has about three times the mass of the sun. The visual star diameter was measured using interferometric methods to be 4.99 milli-arcseconds. The calculated distance results in an approx. 43-fold solar radius. The effective temperature of its photosphere is 4320 K. That is why the star glows in organic light, which is typical for a star of the spectral class K. In the past, the star was roughly four times as massive as the sun. During this time it was a B5 V main sequence star.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k eps Crv. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 4, 2018 .
↑ CHF Melo et al .: On the nature of lithium-rich giant stars. Constraints from beryllium abundances. In: Astronomy and Astrophysics. 439 (1), August 2005, pp. 227-235, arXiv : astro-ph / 0504133  , 2005A & A ... 439..227M , doi: 10.1051 / 0004-6361: 20041805
↑ A. Richichi, I. Percheron, M. Khristoforova: Charm2: An updated Catalog of High Angular Resolution Measurements. In: Astronomy and Astrophysics. 431, February 2005, pp. 773-777, 2005A & A ... 431..773R , doi: 10.1051 / 0004-6361: 20042039
↑ Kenneth R. Lang: Astrophysical formulas. (= Astronomy and astrophysics library. 1). 3. Edition. Birkhäuser, 2006, ISBN 3-540-29692-1 . The radius (R _* ) is defined by: ${\ displaystyle {\ begin {aligned} 2 \ cdot R _ {*} & = {\ frac {(10 ^ {- 3} \ cdot 80 \ cdot 4.99) \ {\ text {AU}}} {0.0046491 \ {\ text {AU}} / R _ {\ bigodot}}} \\ & \ approx 86 \ cdot R _ {\ bigodot} \ end {aligned}}}$
↑ James Kaler: Minkar. In: http://stars.astro.illinois.edu/ . Retrieved August 16, 2018 .

[Simbad-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k eps Crv. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 4, 2018 .

[2] CHF Melo et al .: On the nature of lithium-rich giant stars. Constraints from beryllium abundances. In: Astronomy and Astrophysics. 439 (1), August 2005, pp. 227-235, arXiv : astro-ph / 0504133  , 2005A & A ... 439..227M , doi: 10.1051 / 0004-6361: 20041805

[3] A. Richichi, I. Percheron, M. Khristoforova: Charm2: An updated Catalog of High Angular Resolution Measurements. In: Astronomy and Astrophysics. 431, February 2005, pp. 773-777, 2005A & A ... 431..773R , doi: 10.1051 / 0004-6361: 20042039

[4] Kenneth R. Lang: Astrophysical formulas. (= Astronomy and astrophysics library. 1). 3. Edition. Birkhäuser, 2006, ISBN 3-540-29692-1 . The radius (R _* ) is defined by: ${\ displaystyle {\ begin {aligned} 2 \ cdot R _ {*} & = {\ frac {(10 ^ {- 3} \ cdot 80 \ cdot 4.99) \ {\ text {AU}}} {0.0046491 \ {\ text {AU}} / R _ {\ bigodot}}} \\ & \ approx 86 \ cdot R _ {\ bigodot} \ end {aligned}}}$

[5] James Kaler: Minkar. In: http://stars.astro.illinois.edu/ . Retrieved August 16, 2018 .