11 Lacertae

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11 Lacertae
Observation data
Epoch J2000      Equinox J2000
Constellation Lacerta[1]
Right ascension 22h 40m 30.85881s[2]
Declination +44° 16′ 34.7042″[2]
Apparent magnitude (V) 4.46[3]
Spectral type K2.5 III[4]
U−B color index +1.36[3]
B−V color index +1.33[3]
Proper motion (μ) RA: +93.83[2] mas/yr
Dec.: +10.71[2] mas/yr
Parallax (π)9.80 ± 0.26[2] mas
Distance333 ± 9 ly
(102 ± 3 pc)
Absolute magnitude (MV)+0.3[5]
Radius30[6] R
Luminosity287[6] L
Surface gravity (log g)2.32[7] cgs
Temperature4,440[7] K
Metallicity [Fe/H]−0.25[7] dex
Rotational velocity (v sin i)8[8] km/s
Other designations
11 Lac, HR 8632, BD+43°4266, HD 214868, SAO 52251, HIP 111944
Database references

11 Lacertae (11 Lac) is a star in the constellation Lacerta. 11 Lacertae is a giant star with a stellar classification of K2.5 III, an apparent magnitude of 4.5 and absolute magnitude +0.3. It lies at a distance of about 333 light years.


  1. ^ Roman, N. G. (1987). "Identification of a Constellation from a Position". Retrieved 2006-12-26. 
  2. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  3. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  4. ^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. 
  5. ^ Wilson, O. C. (1976). "Absolute magnitudes of stars from widths of chromospheric Ca II emission lines". Astrophysical Journal. 205: 823. Bibcode:1976ApJ...205..823W. doi:10.1086/154338. 
  6. ^ a b Baines, Ellyn K.; et al. (February 2010). "Angular Diameters and Effective Temperatures of 25 K Giant Stars from the CHARA Array". The Astrophysical Journal. 710 (2): 1365–1374. arXiv:0912.5491Freely accessible. Bibcode:2010ApJ...710.1365B. doi:10.1088/0004-637X/710/2/1365.  See table 4.
  7. ^ a b c McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". Astrophysical Journal Supplement Series. 74: 1075–1128. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527. 
  8. ^ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1). Bibcode:1970CoAsi.239....1B. 

Coordinates: Sky map 22h 40m 30.78s, +44° 16′ 34.6″