| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h31m 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] |
| Distance | 400 ± 9 ly (123 ± 3 pc) |
| Absolute magnitude (MV) | −0.76[5] |
| Details[2] | |
| Mass | 1.40±0.12 M☉ |
| Radius | 78.38+1.98 −1.90 R☉ |
| Luminosity | 831.5±56.8 L☉ |
| Temperature | 3,500±46 K |
| Metallicity [Fe/H] | 0.00 dex |
| Age | 2.90±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 | |
| SIMBAD | data |
74 Virginis is a single[7] star in the zodiac constellationofVirgo.[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 parallaxof8.16 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 extinctionof0.46±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]
