Upsilon Boötis

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Template:Short description

Upsilon Boötis
Template:Location mark
Location of υ Boötis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Boötes
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.023[2]
Characteristics
Spectral type K5.5 III[3]
U−B Template:Engvar +1.893[2]
B−V Template:Engvar +1.518[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[4] km/s
Proper motion (μ) RA: −93.269 mas/yr[1]
Dec.: +40.166 mas/yr[1]
Parallax (π)13.4228±0.1380 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute bolometric
magnitude (Mbol)		Script error: No such module "val".[5]
Details
MassScript error: No such module "val".[6] Template:Solar mass
RadiusScript error: No such module "val".[7] Template:Solar radius
LuminosityScript error: No such module "val".[6] Template:Solar luminosity
Surface gravity (log g)1.5[4] cgs
Temperature3,920[6] K
Metallicity [Fe/H]−0.23[4] dex
Rotational velocity (v sin i)5.1[4] km/s
AgeScript error: No such module "val".[7] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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Upsilon Boötis is a single,[9] orange-hued star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from υ Boötis, and abbreviated Upsilon Boo or υ Boo. This is a fourth[2] magnitude star that is visible to the naked eye. Based upon an annual parallax shift of Script error: No such module "val". as seen from the Earth,[1] it is located about Script error: No such module "convert". distant. The star is moving closer to the Sun with a radial velocity of −6 km/s.[4]

This is an evolved K-type giant star with a stellar classification of K5.5 III.[3] Astroseismology was used to obtain a mass estimate of 1.11 times the mass of the Sun,[6] while interferometric measurements give a size of about 38[5] times the Sun's radius. It is radiating about 332[6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,920 K.[6] The star is roughly 10[7] billion years old and is spinning with a projected rotational velocity of 5.1 km/s.[4]

References

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  1. ↑ a b c d e Template:Cite Gaia DR3
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ a b Script error: No such module "citation/CS1".
  4. ↑ a b c d e f Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b c d e f Script error: No such module "citation/CS1".
  7. ↑ a b c Script error: No such module "citation/CS1"..
  8. ↑ Template:Cite simbad
  9. ↑ Script error: No such module "citation/CS1".

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External links

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Template:Stars of Boötes

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