Nu2 Lyrae

For other stars with this Bayer designation, see ν Lyrae
ν2 Lyrae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lyra
Right ascension 18h 49m 52.91721s[1]
Declination +32° 33′ 03.8153″[1]
Apparent magnitude (V) 5.23[2]
Characteristics
Spectral type A3 V[3]
U−B color index +0.12[2]
B−V color index +0.10[2]
Astrometry
Proper motion (μ) RA: −11.12[1] mas/yr
Dec.: −11.90[1] mas/yr
Parallax (π)14.09 ± 0.25 mas[1]
Distance231 ± 4 ly
(71 ± 1 pc)
Absolute magnitude (MV)+0.97[4]
Details
Mass1.91[5] M☉
Radius1.5[6] R☉
Luminosity32[7] L☉
Surface gravity (log g)3.89±0.14[5] cgs
Temperature8,912±303[5] K
Rotational velocity (v sin i)128[3] km/s
Age214[5] Myr
Other designations
ν2 Lyr, 9 Lyr, BD+32° 3228, HD 174602, HIP 92405, HR 7102, SAO 67446.[8]
Database references
SIMBADdata

Nu2 Lyrae, Latinized from ν2 Lyrae, or sometimes simply Nu Lyrae, is a solitary[9] star in the northern constellation of Lyra. Based upon an annual parallax shift of 14.09 mas as seen from Earth, it is located around 231 light years from the Sun. With an apparent visual magnitude of 5.23,[2] it is bright enough to be faintly visible to the naked eye.

This is a white-hued A-type main sequence star with a stellar classification of A3 V.[3] At an estimated age of 214 million years,[5] it is spinning with a projected rotational velocity of 128 km/s.[3] This is giving the star an oblate shape with an equatorial bulge that is 5% larger than the polar radius.[10] Nu2 Lyrae has an estimated 1.9[5] times the mass of the Sun and about 1.5[6] times the Sun's radius. It is radiating 32[7] times the solar luminosity from its photosphere at an effective temperature of around 8,912 K.[5]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Royer2007 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference vanBelle2012 was invoked but never defined (see the help page).