Beta Lacertae

β Lacertae

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Lacerta
Right ascension	22h 23m 33.6235s[1]
Declination	+52° 13′ 44.567″[1]
Apparent magnitude (V)	4.43[1]
Characteristics
Spectral type	G8.5IIIb[1]
U−B color index	+0.77[2]
B−V color index	+1.02[2]
V−R color index	0.6[1]
R−I color index	+0.57[2]
Astrometry
Radial velocity (Rv)	−10.4 ± 0.9[1] km/s
Proper motion (μ)	RA: −13.56[1] mas/yr Dec.: −186.37[1] mas/yr
Parallax (π)	19.21 ± 0.51[1] mas
Distance	170 ± 5 ly (52 ± 1 pc)
Absolute magnitude (MV)	0.85[3]
Details
Radius	5.8[4] R☉
Rotational velocity (v sin i)	< 17[2] km/s
Other designations
β Lac, Beta Lacertae, Beta Lac, 3 Lacertae, 3 Lac, BD+51 3358, FK5 844, GC 31310, HD 212496, HIP 110538, HR 8538, NLTT 53741, PPM 40598, SAO 34395.[1]
Database references
SIMBAD	data

Beta Lacertae (Beta Lac, β Lacertae, β Lac) is the fourth brightest star in the constellation of Lacerta. It is a G-type giant with an apparent visual magnitude of approximately 4.43.^[1]

References

1. ^ ^{a b c d e f g h i j k} NLTT 53741 -- High proper-motion Star, database entry, SIMBAD. Accessed on line November 17, 2008.
2. ^ ^{a b c d} HR 8538, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 17, 2008.
3. ^ From apparent magnitude and parallax.
4. ^ HD 212496, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 17, 2008.