HD 43197

HD 43197 is a 9th magnitude G-type main sequence or subgiant star located approximately 180 light years away in the constellation Canis Major. This star is larger, cooler, fainter, and less massive than our Sun. Also its metal content is five halves as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.[3]

HD 43197
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension  06h 13m 35.6615s[1]
Declination –29° 53′ 50.169″[1]
Apparent magnitude (V) 8.95
Characteristics
Spectral type G9IV/V
Apparent magnitude (B) 9.75
Apparent magnitude (J) 7.658
Apparent magnitude (H) 7.328
Apparent magnitude (K) 7.203
B−V color index 0.80
Astrometry
Proper motion (μ) RA: 148.65±1.10[1] mas/yr
Dec.: 13.66±1.24[1] mas/yr
Parallax (π)17.76 ± 1.22[1] mas
Distance180 ± 10 ly
(56 ± 4 pc)
Absolute magnitude (MV)5.25
Details
Mass1.02 ± 0.02[2] M☉
Radius0.96 ± 0.02[2] R☉
Luminosity0.74 ± 0.01[2] L☉
Surface gravity (log g)4.47 ± 0.03[2] cgs
Temperature5469 ± 35[2] K
Metallicity [Fe/H]0.4 dex
Age3.1 ± 2.0[2] Gyr
Other designations
Amadioha, CD–29°2884, HIP 29550, PPM 250048, SAO 171427
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

The star HD 43197 is named Amadioha. The name was selected in the NameExoWorlds campaign by Nigeria, during the 100th anniversary of the IAU. Amadioha is the god of thunder in Igbo mythology.[4][5]

The HD 43197 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥ 0.60+0.12
−0.04 MJ		 0.92+0.01
−0.02		 327.8±1.2 0.83+0.05
−0.01		 — —

See also
  • List of extrasolar planets

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  3. Naef, D.; et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics. 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616.
  4. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  5. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.


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