40 Boötis

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Template:Short description

40 Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.64[2]
Characteristics
Evolutionary stage giant[3]
Spectral type F1 III–IV[4]
B−V Template:Engvar Script error: No such module "val".[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −32.109[1] mas/yr
Dec.: 41.246[1] mas/yr
Parallax (π)19.5911±0.0702 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)2.08[2]
Details
Mass1.47[6] Template:Solar mass
RadiusScript error: No such module "val".[1] Template:Solar radius
LuminosityScript error: No such module "val".[1] Template:Solar luminosity
Surface gravity (log g)3.88[6] cgs
TemperatureScript error: No such module "val".[6] K
Metallicity [Fe/H]−0.29[5] dex
Rotational velocity (v sin i)72.5[3] km/s
Age1.166[6] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[7]
Database references
SIMBADdata

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40 Boötis is a single[8] star located 166.5 light years away from the Sun in the northern constellation of Boötes. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.64.[2] The star is moving away from the Earth with a heliocentric radial velocity of +12 km/s.[5]

The Hipparcos catalogue (1997) lists a stellar classification of F1 III–IV,[9] matching the luminosity class of an aging star that is evolving into a giant.[3] Earlier, Cowley and Bidelman (1979) listed a class of F2 III,[10] while Sato and Kuji (1990) found a main sequence class of F0V.[11] It is around 1.2[6] billion years old with a relatively high rotation rate, showing a projected rotational velocity of 72.5 km/s.[3] The star has 1.5[6] times the mass of the Sun and 2.4[1] times the Sun's radius. It is radiating 11.6[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,070 K.[6]

References

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  1. ↑ a b c d e f g h i Template:Cite DR2
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  5. ↑ a b c Script error: No such module "citation/CS1".
  6. ↑ a b c d e f g Script error: No such module "citation/CS1".
  7. ↑ Template:Cite simbad
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Boötes

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