Tau Boötis A
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Key Facts
- Instance of: rotating variable star[1], near-infrared source[2], ultraviolet source[3], astrophysical X-ray source[4]
- Constellation: Boötes[5]
- Spectral class: F5V[6]
- Part of: Tau Boötis[7], Hyades Stream[8]
- Child astronomical body: Tau Boötis b[9]
- Catalog code: GJ 527 A[10], ADS 9025 A[11], CCDM J13473+1727A[12], IDS 13425+1757 A[13], WDS J13473+1727A[14], Gaia DR2 1244571953471006720[15], 2MASS J13471581+1727249[16], SAO 100706[17], GSC 01460-00132[18], HD 120136[19], HIP 67275[20], HR 5185[21], GJ 527[22], BD+18 2782[23]
- Type of variable star: rotating variable star[24]
- Orbital eccentricity: 0.0787[25]
- Apparent magnitude: 4.98[26], 4.49[27], 5.02[28], 4.09[29], 3.85[30], 3.62[31], 3.55[32], 3.36[33], 4.356021[34]
- Absolute magnitude: 3.18[35]
- Orbital inclination: 45 degree[36]
- M sin i: 4.13 Jupiter mass[37]
- Luminosity: 3 solar luminosity[38]
- Radius: 1.06 Jupiter radius[39]
- Orbital period: 3.31249 day[40]
- Parallax: 64.047 milliarcsecond[41]
- Radial velocity: -16.94 kilometre per second[42]
- Metallicity: 0.272[43]
- Semi-major axis of an orbit: 0.046 astronomical unit[44]
- Argument of periapsis: 218.4 degree[45]