74 Virginis

This article is about l Virginis. Not to be confused with ι (iota) Virginis or i Virginis.
74 Virginis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 13h 31m 57.88506s[1]
Declination −06° 15′ 20.9419″[1]
Apparent magnitude (V) 4.69±0.01[2]
Characteristics
Spectral type M2.5 III[3]
B−V color index 1.606±0.035
Astrometry
Radial velocity (Rv)+18.71±0.15[4] km/s
Proper motion (μ) RA: −103.94[1] mas/yr
Dec.: −43.87[1] mas/yr
Parallax (π)8.16 ± 0.19 mas[1]
Distance400 ± 9 ly
(123 ± 3 pc)
Absolute magnitude (MV)−0.76[5]
Details[2]
Mass1.40±0.12 M☉
Radius78.38+1.98
−1.90 R☉
Luminosity831.5±56.8 L☉
Temperature3,500±46 K
Metallicity [Fe/H]0.00 dex
Age2.90±0.68 Gyr
Other designations
l Vir, 74 Vir, NSV 6297, BD−05°3714, FK5 3079, HD 117675, HIP 66006, HR 5095, SAO 139390[6]
Database references
SIMBADdata

74 Virginis is a single[7] star in the zodiac constellation of Virgo.[6] It is visible to the naked eye as a faint red-hued star with an apparent visual magnitude of 4.69.[2] The star is positioned near the ecliptic and thus is subject to lunar occultations.[8] The measured annual parallax of 8.16 mas[1] provides a distance estimate of around 400 light-years from the Sun. At that range, the visual magnitude of the star is diminished by an extinction of 0.46±0.02 due to interstellar dust.[2] It is moving further from the Earth with a heliocentric radial velocity of +19 km/s.[4]

This is an aging red giant star with a stellar classification of M2.5 III,[3] which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. It is a suspected variable star that may vary in brightness with an amplitude of 0.07 in magnitude.[9] The star is roughly 2.9 billion years old with 1.4 times the mass of the Sun and has expanded to around 78 times the Sun's radius. 74 Virginis is radiating 832 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,500 K.[2]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Baines2018 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Famaey2009 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Antal1962 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).