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Star in the constellation Microscopium From Wikipedia, the free encyclopedia
ζ Microscopii, Latinised as Zeta Microscopii, is a solitary,[9] yellow-white hued star in the southern constellation of Microscopium. It is faintly visible to the naked eye with an apparent visual magnitude of +5.31.[2] Based upon an annual parallax shift of 28.27 mas as seen from the Earth,[1] it is 115 light years from the Sun. The star is moving away from the Sun with a radial velocity of +4.6 km/s.[4]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Microscopium |
Right ascension | 21h 02m 57.95290s[1] |
Declination | −38° 37′ 53.2099″[1] |
Apparent magnitude (V) | 5.31[2] |
Characteristics | |
Spectral type | F5 V[3] |
B−V color index | +0.41[2] |
Astrometry | |
Radial velocity (Rv) | +4.6[4] km/s |
Proper motion (μ) | RA: −29.16[1] mas/yr Dec.: −108.85[1] mas/yr |
Parallax (π) | 28.27 ± 0.33 mas[1] |
Distance | 115 ± 1 ly (35.4 ± 0.4 pc) |
Absolute magnitude (MV) | 2.58[5] |
Details | |
Mass | 1.40[6] M☉ |
Luminosity | 7.5[7] L☉ |
Surface gravity (log g) | 3.97[6] cgs |
Temperature | 6,627±225[6] K |
Metallicity [Fe/H] | −0.13[3] dex |
Rotational velocity (v sin i) | 44.4±2.2[5] km/s |
Age | 2.2[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is an F-type main-sequence star with a stellar classification of F5 V.[3] This indicates that, at the age of 2.2[6] billion years, it is still generating energy through hydrogen fusion at its core. It is radiating 7.5[7] times the Sun's luminosity from its photosphere at an effective temperature of 6,471 K.[6] The star has an estimated 1.4[6] times the mass of the Sun and is spinning with a moderately high projected rotational velocity of 44.4 km/s.[5]
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