Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
---|---|
Constellation | Mensa |
Right ascension | 05h 02m 42.99847s[1] |
Declination | −71° 18′ 51.4765″[1] |
Apparent magnitude (V) | 5.31[2] |
Characteristics | |
Spectral type | G8 III[3] |
U−Bcolor index | +0.77[2] |
B−Vcolor index | +1.00[2] |
Astrometry | |
Radial velocity (Rv) | −11.40[4] km/s |
Proper motion (μ) | RA: −4.368[1]mas/yr Dec.: +10.815[1]mas/yr |
Parallax (π) | 4.9368±0.0810 mas[1] |
Distance | 660 ± 10 ly (203 ± 3 pc) |
Absolute magnitude (MV) | −1.62[5] |
Details | |
Mass | 3.58[4] M☉ |
Radius | 25.85+0.69 −0.62[1] R☉ |
Luminosity | 345±7[1] L☉ |
Surface gravity (log g) | 2.54±0.11[6] cgs |
Temperature | 5,088±44[6] K |
Metallicity [Fe/H] | +0.00±0.04[6] dex |
Age | 270[4] Myr |
Other designations | |
β Men,CPD−71° 309,FK5 2380,GC 6232,HD 33285,HIP 23467,HR 1677,SAO 256154,PPM 368632[7] | |
Database references | |
SIMBAD | data |
Beta Mensae,Latinized from β Mensae, is the third-brighteststar in theconstellation ofMensa. Despite this, it is only faintly visible to the naked eye, appearing as a dim, yellow-hued point of light with anapparent visual magnitude of 5.31.[2] The star is positioned near the southwest edge of theLarge Magellanic Cloud, but it does not form part of this much more distantsatellite galaxy. Based upon an annualparallax shift of just 4.11 mas as seen from the Earth,[8] the star is located at a distance of roughly 790 light years from theSun. It is moving closer with a heliocentricradial velocity of −11 km/s.[4]
This is a solitary,[9]G-typegiant star with astellar classification of G8 III.[3] It is around 270 million years old with 3.6 times themass of the Sun.[4] Having exhausted the supply of hydrogen at itscore, it has expanded to 26[1] times theSun's radius. Beta Mensae is radiating 513[4] times theSun's luminosity from itsphotosphere at aneffective temperature of about 5,088 K.[6]
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