Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lacerta |
Right ascension | 22h 30m 29.26005s[1] |
Declination | +43° 07′ 24.1565″[1] |
Apparent magnitude (V) | 4.52[2] |
Characteristics | |
Spectral type | B2 IV[3] |
B−V color index | −0.086±0.018[2] |
Astrometry | |
Radial velocity (Rv) | −8.7±0.9[2] km/s |
Proper motion (μ) | RA: −4.800[1] mas/yr Dec.: −2.598[1] mas/yr |
Parallax (π) | 1.7577 ± 0.2697 mas[1] |
Distance | approx. 1,900 ly (approx. 570 pc) |
Absolute magnitude (MV) | −2.62[4] |
Orbit[5] | |
Period (P) | 880 days |
Eccentricity (e) | 0.30 |
Periastron epoch (T) | 2,416,300 JD |
Argument of periastron (ω) (secondary) | 190° |
Semi-amplitude (K1) (primary) | 9 km/s |
Details | |
Mass | 12.5±0.6[6] M☉ |
Radius | 6.9[7] R☉ |
Luminosity (bolometric) | 34,590[8] L☉ |
Surface gravity (log g) | 3.56[9] cgs |
Temperature | 21,150[8] K |
Metallicity [Fe/H] | −0.04[9] dex |
Rotational velocity (v sin i) | 70[10] km/s |
Age | 15.7±0.1[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
6 Lacertae is a binary star[5] system in the northern constellation of Lacerta, located around 1,900 light years from the Sun.[1] It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 4.52.[2] The system is moving closer to the Earth with a heliocentric radial velocity of −9 km/s,[2] and is a suspected member of the Lac OB1 association.[4]
This system forms a single-lined spectroscopic binary with an orbital period of 880 days and an eccentricity of 0.3.[5] The visible component has a stellar classification of B2 IV,[3] matching a B-type subgiant star. It is about 16[6] million years old with a relatively high projected rotational velocity of 70 km/s.[10] The star has 12.5[6] times the mass of the Sun and about 7[7] times the Sun's radius. It is radiating a net 34,590[8] times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K.[8]
GaiaDR2
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