Nu1 Lyrae

For other stars with this Bayer designation, see ν Lyrae
ν1 Lyrae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lyra
Right ascension 18h 49m 45.91431s[1]
Declination +32° 48′ 46.1656″[1]
Apparent magnitude (V) 5.91[2]
Characteristics
Spectral type B3 IV[3]
U−B color index −0.71[2]
B−V color index −0.16[2]
Variable type Suspected[4]
Astrometry
Radial velocity (Rv)−26.30±1.2 km/s
Proper motion (μ) RA: +2.32±0.17[1] mas/yr
Dec.: −3.87±0.30[1] mas/yr
Parallax (π)2.49 ± 0.24 mas[1]
Distance1,300 ± 100 ly
(400 ± 40 pc)
Absolute magnitude (MV)−1.73[5]
Details
Mass6.9±0.1[3] M☉
Luminosity1,460[6] L☉
Surface gravity (log g)3.86[7] cgs
Temperature14,534[6] K
Rotational velocity (v sin i)145[8] km/s
Age39.8±3.7[3] Myr
Other designations
ν1 Lyr, 8 Lyr, BD+32° 3227, HD 174585, HIP 92398, HR 7100, SAO 67441.[9]
Database references
SIMBADdata

Nu1 Lyrae (ν1 Lyrae) is a star in the northern constellation of Lyra. Based upon an annual parallax shift of 2.49 mas as seen from Earth, it is located approximately 1,300 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.35 due to interstellar dust.[5] With an apparent visual magnitude of 5.91,[2] the star is barely bright enough to be visible with the naked eye on a dark night.

This is a blue-white hued B-type subgiant star with a stellar classification of B3 IV.[3] It is a suspected variable.[4] The star has nearly seven times the mass of the Sun and, at an estimated age of about 40[3] million years, is spinning with a projected rotational velocity of 145 km/s.[8] It radiates approximately 1460 times the solar luminosity from its photosphere at an effective temperature of 14,534 K.[6]

Nu1 Lyrae has four faint visual companions, the nearest being a magnitude 13.0 star at an angular separation of 34.1 arc seconds along a position angle of 76°, as of 2009.[10]

  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 Nicolet1978 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Gerbaldi2001 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).