109 Virginis
109 Virginis is a single, white-hued star in the zodiac constellation of Virgo, located some 134.5 light years away from the Sun. It is the seventh-brightest member of this constellation, having an apparent visual magnitude of +3.72.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 14h 46m 14.92536s |
| Declination | +01° 53′ 34.3845″ |
| Apparent magnitude (V) | +3.72 |
| Characteristics | |
| Spectral type | A0 V |
| B−V color index | −0.005±0.006 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | −6.1±2.7 km/s |
| Proper motion (μ) | RA: −114.03 mas/yr Dec.: −22.13 mas/yr |
| Parallax (π) | 24.25 ± 0.18 mas |
| Distance | 134.5 ± 1.0 ly (41.2 ± 0.3 pc) |
| Details | |
| Mass | 2.58±0.02 M☉ |
| Radius | 2.7 R☉ |
| Luminosity | 62.8+1.8 −1.7 L☉ |
| Surface gravity (log g) | 3.83±0.12 cgs |
| Temperature | 9683+112 −111 K |
| Metallicity [Fe/H] | −0.41±0.14 dex |
| Rotational velocity (v sin i) | 285 km/s |
| Age | 320 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A0 V, and is a suspected chemically peculiar star. However, Abt and Morrell (1995) gave it a class of A0 IIInn, matching a giant star with "nebulous" lines. It is spinning rapidly with a projected rotational velocity of 285 km/s, which is giving the star an oblate shape with an equatorial bulge that is an estimated 31% larger than the polar radius. The star is 320 million years old with 2.58 times the mass of the Sun and about 2.7 times the Sun's radius. It is radiating 63 times the Sun's luminosity from its photosphere at an effective temperature of 9,683 K.