Tau1 Aquarii

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τ1 Aquarii
Template:Location mark
Location of τ1 Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) +5.66[3]
Characteristics
Spectral type B9 V[4]
U−B Template:Engvar −0.25[5]
B−V Template:Engvar −0.05[5]
Variable type Constant[6]
Astrometry
Radial velocity (Rv)+15[7] km/s
Proper motion (μ) RA: +30.413 mas/yr[2]
Dec.: −9.053 mas/yr[2]
Parallax (π)9.1322±0.0557 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.74[1]
Details
MassScript error: No such module "val".[8] Template:Solar mass
RadiusTemplate:Solar radius calculator[8]Template:Efn Template:Solar radius
LuminosityScript error: No such module "val".[8] Template:Solar luminosity
TemperatureScript error: No such module "val".[8] K
Rotational velocity (v sin i)185[9] km/s
AgeScript error: No such module "val".[8] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Tau1 Aquarii is a solitary[11] star in the equatorial constellation of Aquarius. Its name is a Bayer designation that is Latinized from τ1 Aquarii, and abbreviated Tau1 Aqr or τ1 Aqr. With an apparent visual magnitude of 5.66,[3] it is a faint naked eye target that requires dark suburban skies for viewing. Parallax measurements yield a distance estimate of approximately Script error: No such module "convert". from the Sun.[2] The star is drifting further away with a radial velocity of +15 km/s.[7] It is a candidate member of the Pisces-Eridanus stellar stream.[12]

The stellar classification of τ1 Aquarii is B9 V;[4] at the borderline between a B- and A-type main sequence star. This is a candidate silicon star; a type of Ap star of class CP2 that shows a magnetic field.[13] It is around 100[14] million years old and is spinning rapidly with a projected rotational velocity of 185 km/s.[9] The star has 2.8 times the mass of the Sun and 2.788 the Sun's radius. It is radiating 87 times the luminosity of the Sun from its photosphere at an effective temperature of 10,560 K.[8] When examined in the infrared band, it displays an excess emission that is a characteristic of stars with an orbiting debris disk. The model that best fits the data suggests there are two concentric circumstellar disks.[14]

Notes

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References

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

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External links

Template:Stars of Aquarius

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