11 Lacertae

11 Lacertae

11 Lacertae in optical light
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]
Distance350 ± 4 ly
(107 ± 1 pc)
Absolute magnitude (MV)−0.54[6]
Details
Mass1.38[7] M☉
Radius29.5±0.5[8] R☉
Luminosity279±10[9] L☉
Surface gravity (log g)1.56±0.06[9] cgs
Temperature4,352[10] K
Metallicity [Fe/H]−0.2±0.02[9] dex
Rotational velocity (v sin i)8[11] km/s
Age3.2[7] Gyr
Other designations
11 Lac, BD+43° 4266, HD 214868, HIP 111944, HR 8632, SAO 52251[12]
Database references
SIMBADdata

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]

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  10. ^ a b Cite error: The named reference maldonado was invoked but never defined (see the help page).
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  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).