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	06^h 13^m 35.6615^s[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
Distance	180 ± 10 ly (56 ± 4 pc)
Absolute magnitude (MV)	5.25
Details
Mass	1.02 ± 0.02[2] M☉
Radius	0.96 ± 0.02[2] R☉
Luminosity	0.74 ± 0.01[2] L☉
Surface gravity (log g)	4.47 ± 0.03[2] cgs
Temperature	5469 ± 35[2] K
Metallicity [Fe/H]	0.4 dex
Age	3.1 ± 2.0[2] Gyr
Other designations
Amadioha, CD–29°2884, HIP 29550, PPM 250048, SAO 171427
Database references
SIMBAD	data
Exoplanet Archive	data
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. S2CID 18759600. 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. S2CID 54555839.
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. S2CID 118845989.
4. "Approved names". NameExoworlds. Retrieved 2020-01-02.
5. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.