Zeta Mensae, Latinized from ζ Mensae, is a solitary,[9] white-hued star in the southern constellation of Mensa. It is faintly visible to the naked eye, having an apparent visual magnitude of +5.64.[2] Based upon an annual parallax shift of 8.2879 mas as seen from GAIA, it is located around 394 light years from the Sun.[1] At that distance, the visual magnitude is diminished by an extinction factor of 0.088 due to interstellar dust.[4] Eggen (1995) listed it as a proper motion candidate for membership in the IC 2391 supercluster.[10]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Mensa |
Right ascension | 06h 40m 02.89197s[1] |
Declination | −80° 48′ 48.9391″[1] |
Apparent magnitude (V) | +5.64[2] |
Characteristics | |
Spectral type | A5 III[3][4] |
U−B color index | +0.15[2] |
B−V color index | +0.20[2] |
Astrometry | |
Radial velocity (Rv) | +7.0±7.4[5] km/s |
Proper motion (μ) | RA: −4.801[1] mas/yr Dec.: +53.158[1] mas/yr |
Parallax (π) | 8.2879 ± 0.0870 mas[1] |
Distance | 394 ± 4 ly (121 ± 1 pc) |
Absolute magnitude (MV) | +0.09[6] |
Details | |
Radius | 4.65±0.27[1] R☉ |
Luminosity | 66.39±0.86[1] L☉ |
Temperature | 7,555±43[4] K |
Rotational velocity (v sin i) | 200[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
The stellar classification of A5 III[3] suggests this is an A-type giant star. It is spinning rapidly, showing a projected rotational velocity of 200 km/s,[7] giving the star an oblate shape with an equatorial bulge that is an estimated 26% larger than the polar radius.[3] The star is radiating about 69[11] times the Sun's luminosity from its photosphere at an effective temperature of around 7,555 K.[4] It displays a faint infrared excess at a wavelength of 18μm, indicating that it is being orbited by a debris disk.[12]