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【habitat】
spectroscopic binary star and rotating ellipsoidal variable Right ascension 13h 25m 11.579s[3] Declination −11° 09′ 40.75″[3] Apparent magnitude (V) +0.97[4] (0.97–1.04[5]) Spectral type B1III-IV + B2V[6] U−B color index −0.94[4] B−V color index −0.23[4] Variable type β Cep + Ellipsoidal[5] Astrometry Radial velocity (Rv) +1.0[7] km/s Proper motion (μ) RA: −42.35±0.62[3] mas/yr Dec.: −30.67±0.37[3] mas/yr Parallax (π) 13.06±0.70 mas[3] Distance 250 ± 10 ly (77 ± 4 pc) Absolute magnitude (MV) −3.55 (−3.5/−1.5)[8] Orbit[9] Period (P) 4.0145±0.0001 d Semi-major axis (a) 28.20±0.92 R☉ Eccentricity (e) 0.133±0.017 Inclination (i) 63.1±2.5° Periastron epoch (T) 2,454,189.4±0.02 Argument of periastron (ω) (secondary) 255.6±12.2° Details[9] Primary Mass 11.43±1.15 M☉ Radius 7.47±0.54 R☉ Luminosity 20,500+5,000 −4,000 L☉ Surface gravity (log g) 3.71±0.10 cgs Temperature 25,300±500 K Rotational velocity (v sin i) 165.3±4.5 km/s Age 12.5 Myr Secondary Mass 7.21±0.75 M☉ Radius 3.74±0.53 R☉ Luminosity 2,300+1,200 −800 L☉ Surface gravity (log g) 4.15±0.15 cgs Temperature 20,900±800 K Rotational velocity (v sin i) 58.8±1.5 km/s