Bibha

HD 86081 or Bibha, named after Indian physicist Bibha Chowdhuri[3], is a yellow-white dwarf star in the constellation Sextans south of the celestial equator. It is bigger and more massive than our Sun at 1.22 and 1.21 solar units respectively. It has temperature of 6028 K and luminosity of 1.75 solar.

HD 86081, Bibha
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sextans
Right ascension  09h 56m 05.9185s[1]
Declination −03° 48′ 30.3233″[1]
Apparent magnitude (V) 8.74
Characteristics
Spectral type F8V
Astrometry
Proper motion (μ) RA: −67.001±0.079[1] mas/yr
Dec.: 15.999±0.076[1] mas/yr
Parallax (π)9.5928 ± 0.0509[1] mas
Distance340 ± 2 ly
(104.2 ± 0.6 pc)
Details
Other designations
BD−03 2815, HIP 48711, SAO 137236[2]
Database references
SIMBADdata

HD 86081 shows no evidence of planetary transits in spite of a 17.6% transit probability. [4] The star is chromospherically inactive, with no emission seen in the core of the Ca II H and K lines. [4]

The star began being monitored in November 2005 [4] and its first planet was discovered on April 17, 2006.[4]

The Bibha planetary system[5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.48±0.23 MJ 0.0346±0.0027 2.1378431±0.0000031 0.0119±0.0047 — —

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. "HD 86081". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-12-28.
  3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  4. Johnson, John Asher; et al. (2006). "The N2K Consortium. VI. Doppler Shifts without Templates and Three New Short-Period Planets". The Astrophysical Journal. 647 (1): 600–611. arXiv:astro-ph/0604348. Bibcode:2006ApJ...647..600J. doi:10.1086/505173.
  5. Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5.

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