Omega1 Aquilae

For other star systems with this Bayer designation, see ω Aquilae.
ω1 Aquilae
Location of ω1 Aquilae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aquila
Right ascension 19h 17m 48.99957s[1]
Declination +11° 35′ 43.5234″[1]
Apparent magnitude (V) 5.284[2]
Characteristics
Evolutionary stage subgiant[3]
Spectral type F0 IV[4]
U−B color index +0.204[2]
B−V color index +0.238[2]
Astrometry
Radial velocity (Rv)−14.3[5] km/s
Proper motion (μ) RA: +0.706[1] mas/yr
Dec.: +13.947[1] mas/yr
Parallax (π)8.5341 ± 0.1401 mas[1]
Distance382 ± 6 ly
(117 ± 2 pc)
Absolute magnitude (MV)−0.24[6]
Details
Mass2.85±0.06[3] M☉
Radius5.08+0.34
−0.25[1] R☉
Luminosity84.7±1.6[1] L☉
Temperature7,766+206
−245[1] K
Rotational velocity (v sin i)89[3] km/s
Other designations
ω1 Aql, 25 Aquilae, BD+11°3790, FK5 725, HD 180868, HIP 94834, HR 7315, SAO 104691[7]
Database references
SIMBADdata

Omega1 Aquilae, which is Latinized from ω1 Aquilae, is the Bayer designation for a single[8] star in the equatorial constellation of Aquila. With an apparent visual magnitude of 5.2[2] it is a faint, yellow-white hued star that can be seen with the naked eye in dark skies. From the annual parallax shift of 8.53 mas,[1] the distance to this star can be estimated as 382 light-years (117 parsecs), give or take a 6 light year margin of error. It is drifting closer to the Sun with a radial velocity of −14 km/s.[5]

The spectrum of this star fits a stellar classification of F0 IV.[4] Typically, a luminosity class of IV means that the star is in the subgiant stage. It is rotating rapidly with a projected rotational velocity of 115  km/s. This is causing an equatorial bulge that is 5% larger than the polar radius.[9] The star has 2.85[3] times the mass of the Sun and five[1] times the Sun's radius. It is radiating 85 times the luminosity of the Sun from its photosphere at an effective temperature of 7,766 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference sps1966 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aj74_375 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference scfs was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aar20_1_51 was invoked but never defined (see the help page).