82 Virginis
Star in the constellation Virgo
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82 Virginis, also known as m Virginis, is a star in the constellation Virgo. It is located 160 pc (520 light-years) from Earth based on a parallax of 6.249±0.2611 mas from Gaia Data Release 3.[1] It is a red giant, based on its spectral type of M1III.[4] Its apparent magnitude is 5.01.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 41m 36.770s[1] |
| Declination | −08° 42′ 10.73″[1] |
| Apparent magnitude (V) | 5.01[2] |
| Characteristics | |
| Evolutionary stage | AGB[3] |
| Spectral type | M1III |
| Apparent magnitude (U) | 8.59[4] |
| Apparent magnitude (B) | 6.64[4] |
| Apparent magnitude (G) | 4.149[4] |
| Apparent magnitude (J) | 1.68[4] |
| Apparent magnitude (H) | 0.88[4] |
| Apparent magnitude (K) | 0.64[4] |
| B−V color index | 1.623±0.009[5] |
| Astrometry | |
| Radial velocity (Rv) | −36.6±2[4] km/s |
| Proper motion (μ) | RA: -91.65 mas/yr[5] Dec.: 40.28 mas/yr[5] |
| Parallax (π) | 5.4376±0.2897 mas[1] |
| Distance | 600 ± 30 ly (184 ± 10 pc) |
| Absolute magnitude (MV) | −0.7[6] |
| Details | |
| Mass | 6.5[7] M☉ |
| Radius | 54[1] R☉ |
| Luminosity | 812[8] L☉ |
| Surface gravity (log g) | 0.714[2] cgs |
| Temperature | 3,675[2] K |
| Rotational velocity (v sin i) | 2.3±1[9] km/s |
| Age | 50[7] Myr |
| Other designations | |
| m Vir, NSV 6390, BD−07 3674, HD 119149, HIP 66803, HR 5150, SAO 139490, TIC 743613, TYC 5546-1582-1, GSC 05546-01582, IRAS 13389-0827, 2MASS J13413677-0842110 | |
| Database references | |
| SIMBAD | data |
Characteristics
82 Virginis is a red giant star, based on its spectral type of M1III,[4] where M means that it is an M-type star and III is the luminosity class, meaning it is a giant star. The star is 54 times larger than the Sun.[1] The effective temperature of the star is 3,675 K,[2] which is 2,197 degrees cooler than the solar temperature of 5,772 K. Its rotational velocity is 2.3 km/s.[9] The angular diameter of the star, as measured from the CHARM survey, is of 4.48±0.28 mas.[10] At the current distance, this would lead to a radius of 77 R☉, somewhat larger than the radius derived by Gaia DR3.
The parallax of the star is measured at 5.4376±0.2897 mas from Gaia DR3, translating to a distance of 184 parsecs (600 light-years) from Earth.[1] The star is moving towards Earth at a velocity of 36.6 km/s.[4] Its apparent magnitude is 5.01,[2] making it visible to the naked eye.[a]
Notes
- According to the Bortle scale