Lambda Virginis

λ Virginis
(incl. Khambalia)
Location of λ Virginis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 19m 06.59235s[1]
Declination −13° 22′ 15.9459″[1]
Apparent magnitude (V) +4.52[2] (5.00 + 5.63)[3]
Characteristics
Spectral type A1 V[4] (A1V + A1V)[3]
U−B color index +0.12[2]
B−V color index +0.12[2]
Astrometry
Radial velocity (Rv)−10.9[5] km/s
Proper motion (μ) RA: −15.91[1] mas/yr
Dec.: +28.92[1] mas/yr
Parallax (π)18.81 ± 0.10 mas[3]
Distance173.4 ± 0.9 ly
(53.2 ± 0.3 pc)
Absolute magnitude (MV)+0.73[6]
Orbit[3]
Period (P)206.7321±0.0040 d
Semi-major axis (a)19.759±0.079 mas
Eccentricity (e)0.0610±0.0036
Inclination (i)109.86±0.24°
Longitude of the node (Ω)196.40±0.22°
Periastron epoch (T)53,070.30±0.32
Argument of periastron (ω)
(secondary)		272.28±0.46°
Semi-amplitude (K1)
(primary)		24.78±0.17 km/s
Semi-amplitude (K2)
(secondary)		27.308±0.067 km/s
Details
λ Vir A
Mass1.897[3] M☉
Radius2.35[3] R☉
Luminosity20.84±0.25[3] L☉
Surface gravity (log g)3.97[3] cgs
Temperature8,280±200[7] K
Metallicity [Fe/H]0.0097[3] dex
Rotational velocity (v sin i)36±1[3] km/s
Age935[3] Myr
λ Vir B
Mass1.721[3] M☉
Radius1.84[3] R☉
Luminosity12.58±0.16[3] L☉
Surface gravity (log g)4.14[3] cgs
Temperature8,280±200[7] K
Rotational velocity (v sin i)10±2[3] km/s
Other designations
Khambalia, 100 Virginis, λ Vir, BD−12°4018, FK5 1371, HD 125337, HIP 69974, HR 5359, SAO 158489.[8]
Database references
SIMBADdata

Lambda Virginis (λ Virginis, abbreviated Lambda Vir, λ Vir) is a binary star system in the zodiac constellation of Virgo. With an apparent visual magnitude of 4.5, it is bright enough to be seen with the naked eye. Based upon parallax measurements, the system is about 173 light-years away from the Sun. Its two components are designated Lambda Virginis A (formally named Khambalia /kæmˈbeɪliə/)[9] and B.

  1. ^ a b c d Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i j k l m n o p Cite error: The named reference Zhao2007 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference houk1988 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcrv1953 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. ^ a b Cite error: The named reference apjs99_135 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. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.