Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lacerta[1] |
Right ascension | 22h 40m 30.85848s[2] |
Declination | +44° 16′ 34.7069″[2] |
Apparent magnitude (V) | 4.46[3] |
Characteristics | |
Spectral type | K2.5 III[4] |
U−B color index | +1.36[3] |
B−V color index | +1.33[3] |
Astrometry | |
Radial velocity (Rv) | −10.91±0.09[5] km/s |
Proper motion (μ) | RA: +93.728 mas/yr[2] Dec.: +10.946 mas/yr[2] |
Parallax (π) | 9.317 ± 0.105 mas[2] |
Distance | 350 ± 4 ly (107 ± 1 pc) |
Absolute magnitude (MV) | −0.54[6] |
Details | |
Mass | 1.38[7] M☉ |
Radius | 29.5±0.5[8] R☉ |
Luminosity | 279±10[9] L☉ |
Surface gravity (log g) | 1.56±0.06[9] cgs |
Temperature | 4,352[10] K |
Metallicity [Fe/H] | −0.2±0.02[9] dex |
Rotational velocity (v sin i) | 8[11] km/s |
Age | 3.2[7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
11 Lacertae is a star in the northern constellation of Lacerta. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.46.[3] It lies at a distance of about 350[2] light years and has an absolute magnitude -0.54.[6] The object is moving closer to the Earth with a heliocentric radial velocity of −10.9 km/s.[5]
This is an evolved giant star with a stellar classification of K2.5 III.[4] It is a red clump giant, meaning it is fusing helium in its core after passing through the red giant branch.[7] The star is 3.2[7] billion years old with 1.38 times the mass of the Sun and has expanded to 39 times the Sun's radius.[8] It is radiating 280[9] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,352 K.[10]