My Capricorni

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Star
μ Capricorni
μ Cap in the constellation "Capricorn"
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Capricorn
Right ascension 21 h 53 m 17.77 s
declination -13 ° 33 ′ 6.4 ″
Apparent brightness 5.08 likes
Typing
B − V color index 0.37 
Spectral class F2 V
Astrometry
Radial velocity (−48.5 ± 4.3) km / s
parallax (36.95 ± 0.17)  mas
distance (88.3 ± 0.4)  ly
(27.06 ± 0.13)  pc
Visual absolute brightness M vis 2.97 likes
Proper movement 
Rec. Share: (311.13 ± 0.27)  mas / a
Dec. portion: (13.46 ± 0.28)  mas / a
Physical Properties
Dimensions 1.5  M ☉
radius 1.6  R ☉
Effective temperature 6800  K
Metallicity [Fe / H] −0.18
Other names
and catalog entries
Bayer name μ Capricorni
Flamsteed name 51 Capricorni
Bonn survey BD −14 ° 6149
Bright Star Catalog HR 8351 [1]
Henry Draper Catalog HD 207958 [2]
Gliese catalog FY 838.5 [3]
Hipparcos catalog HIP 108036 [4]
SAO catalog SAO 164713 [5]
Tycho catalog TYC 5801-1017-1 [6]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS 21531776-1333063 [7]
Other names FK5 1577

My Capricorni (μ Cap) is a star in the constellation Capricorn . It has an apparent magnitude of 5.1 mag and its distance is about 88 light years .

My Capricorni is a yellow and white main sequence star of about 1.5 times the mass, 1.6 times the diameter and 5.5 times the luminosity of the sun . The star rotates unusually fast with a projected equatorial rotation speed v ∙ sin i of about 70 km / s.

Another special feature is that, for observers on Earth , the star moves across the sky with a relatively fast proper motion of 311 milli-arcseconds / year. For its radial speed, more recent measurements in 2006 showed a value of −48.5 km / s, almost twice as high as previously assumed. In space, the star moves obliquely past us at a speed of 62 km / s relative to our sun . If this movement is maintained, the star will reach its closest approach to the Sun after about 320,000 years and will be only about 55 light-years away. It will then have moved about 51 ° in the sky to the constellation Whale and due to the closer proximity it may appear about 1.0 may appear brighter.

Individual evidence

  1. ↑ a b c d VizieR: Gaia DR2 (Gaia Collaboration, 2018)
  2. ↑ a b c d VizieR: NStars project: The southern sample. I. (Gray +, 2006)
  3. ↑ VizieR: Orion Spiral Arm Catalog (OSACA) (Bobylev +, 2006)
  4. ↑ a b VizieR: Stellar latitudinal differential rotation (Reiners +, 2006)
  5. ^ A b VizieR: Fundamental parameters of stars (Allende Prieto +, 1999)