Beta Scuti

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Template:Short description

β Scuti
Template:Location mark
Location of β Scuti (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Scutum[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.22[3]
Characteristics
Evolutionary stage Giant star
Spectral type G4IIa[4]
U−B Template:Engvar +0.84[5]
B−V Template:Engvar +1.09[5]
Astrometry
Radial velocity (Rv)Template:Val[2] km/s
Proper motion (μ) RA: −7.972 mas/yr[2]
Dec.: −16.398 mas/yr[2]
Parallax (π)4.8549±0.3403 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)[2]
Absolute magnitude (MV)−2.99[1]
Orbit[6]
Period (P)834 days
Semi-major axis (a)2.8 mas
Eccentricity (e)0.350
Inclination (i)105.9°
Longitude of the node (Ω)288.1°
Periastron epoch (T)2422480.9
Argument of periastron (ω)
(secondary)		33.9°
Details
RadiusTemplate:Val[7] Template:Solar radius
LuminosityTemplate:Val[7] Template:Solar luminosity
Surface gravity (log g)0.94[8] cgs
TemperatureTemplate:Val[7] K
Metallicity [Fe/H]-0.16[1] dex
Rotational velocity (v sin i)7.8[9] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
β Sct, BD−04°4582, FK5 1489, GC 25730, GSC 05122-01426, HIP 92175, HR 7063, HD 173764, SAO 142618, CCDM 18472-0445
Database references
SIMBADdata

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Beta Scuti, Latinized from β Scuti, is a binary star system in the southern constellation Scutum. Based upon an annual parallax shift of 4.85 mas as seen from Earth,[2] it is located approximately 670 light years from the Sun.

Characteristics

This is a spectroscopic binary with an orbital period of 2.3 years and eccentricity around 0.35.[10] The secondary is about 3.3 magnitudes dimmer than the primary and estimated as type B9 based on the flux of far-ultraviolet radiation.[11]

The primary component has an apparent visual magnitude of +4.22 and is radiating about 1,315 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 4,951 K.[7] This yellow-hued star is a G-type bright giant with a stellar classification of G4 IIa.[4] Its angular diameter was measured at 2.121Template:Nbspmilliarcseconds by the Navy Precision Optical Interferometer, which gives it a physical radius of approximately Template:Solar radius at the estimated distance.[7]

The secondary was directly detected with a magnitude difference of 3.6 at a separation of about 17 milli-arcseconds using observations from the Navy Precision Optical Interferometer.[12] This detection was significant as observations with the Hubble Space Telescope which indicated a companion star was present were not definitive.[13] With an orbit and a parallax the sum of the masses of the two stars can be determined via a dynamical parallax.[14] This eventually can yield a precise mass for the evolved giant primary star.

Beta Scuti was a latter designation of 6 Aquilae.[15]

References

Template:Reflist

Template:Stars of Scutum

  1. ↑ a b c Template:Cite XHIP
  2. ↑ a b c d e f g Template:Cite Gaia DR3
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  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "Citation/CS1".
  7. ↑ a b c d e Script error: No such module "Citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "Citation/CS1".
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