HD 82943 information

HD 82943
Observation data; Epoch J2000 Equinox J2000
Constellation	Hydra
Right ascension	09h 34m 50.735s
Declination	−12° 07′ 46.37″
Apparent magnitude (V)	6.54
Characteristics
Evolutionary stage	main sequence
Spectral type	F9 V Fe+0.5
B−V color index	0.623±0.001
Astrometry
Radial velocity (Rv)	8.102±0.0003 km/s
Proper motion (μ)	RA: +1.440 mas/yr ; Dec.: −174.330 mas/yr
Parallax (π)	36.1158 ± 0.0264 mas
Distance	90.31 ± 0.07 ly ; (27.69 ± 0.02 pc)
Absolute magnitude (MV)	4.35
Details
Mass	1.14±0.01 M☉
Radius	1.17±0.02 R☉
Luminosity	1.54±0.02 L☉
Surface gravity (log g)	4.35±0.01 cgs
Temperature	5,944±18 K
Metallicity [Fe/H]	0.265±0.008 dex
Rotation	18.0 d
Rotational velocity (v sin i)	1.35±0.5 km/s
Age	3.1±0.4 Gyr
Other designations
	164 G. Hya, BD−11 2670, HD 82943, HIP 47007, SAO 155312
Database references
SIMBAD	data

HD 82943 (164 G. Hydrae) is a star with a pair of orbiting exoplanets in the equatorial constellation of Hydra. It has an apparent visual magnitude of 6.54,^[1] which is near the lower limit of visibility to the naked eye. Based on parallax measurements, the distance to this system is 90.3 light years.^[2] It is drifting further away with a heliocentric radial velocity of 8.1 km/s.^[5] The star shows a high proper motion, traversing the celestial sphere at an angular rate of 0.194 arcsec yr⁻¹.^[10]

The spectrum of HD 82943 presents as an F-type main-sequence star^[3] with a stellar classification of F9 V Fe+0.5.^[4] The suffix notation indicates a mild strengthening of iron lines relative to a typical star of its type. Nonetheless, it is considered a metal-rich star,^[11] having a higher abundance of many elements with masses greater than helium as compared to the Sun. This star is around 3^[6] billion years old and is spinning with a rotation period of 18 days.^[7] It is 14% more massive and has a 17% larger radius than the Sun. The star is radiating 154% of the luminosity of the Sun from its photosphere at an effective temperature of 5,944 K.^[6]

^ ^a ^b ^c ^d ^e Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Kennedy_et_al_2013 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference aj132_1_161 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e ^f ^g ^h Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Mayor2004 was invoked but never defined (see the help page).
^ Cite error: The named reference Butler2006 was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ Cite error: The named reference Luyten1995 was invoked but never defined (see the help page).
^ Cite error: The named reference Santos_et_al_2000 was invoked but never defined (see the help page).

[Anderson_Francis_2012-1] Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).

[GaiaDR3-2] Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).

[Kennedy_et_al_2013-3] Cite error: The named reference Kennedy_et_al_2013 was invoked but never defined (see the help page).

[aj132_1_161-4] Cite error: The named reference aj132_1_161 was invoked but never defined (see the help page).

[Soubiran_et_al_2018-5] Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).

[Bonfanti_et_al_2016-6] ^ ^a ^b ^c ^d ^e ^f ^g ^h Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).

[Mayor2004-7] Cite error: The named reference Mayor2004 was invoked but never defined (see the help page).

[Butler2006-8] Cite error: The named reference Butler2006 was invoked but never defined (see the help page).

[SIMBAD-9] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[Luyten1995-10] Cite error: The named reference Luyten1995 was invoked but never defined (see the help page).

[Santos_et_al_2000-11] Cite error: The named reference Santos_et_al_2000 was invoked but never defined (see the help page).

Observation data Epoch J2000 Equinox J2000
Constellation	Hydra^[1]
Right ascension	09^h 34^m 50.735^s^[2]
Declination	−12° 07′ 46.37″^[2]
Apparent magnitude (V)	6.54^[1]
Characteristics
Evolutionary stage	main sequence^[3]
Spectral type	F9 V Fe+0.5^[4]
B−V color index	0.623±0.001^[1]
Astrometry

Radial velocity (R_v)	8.102±0.0003^[5] km/s
Proper motion (μ)	RA: +1.440 mas/yr^[2] Dec.: −174.330 mas/yr^[2]
Parallax (π)	36.1158 ± 0.0264 mas^[2]
Distance	90.31 ± 0.07 ly (27.69 ± 0.02 pc)
Absolute magnitude (M_V)	4.35^[1]

Details

Mass	1.14±0.01^[6] `M`_☉
Radius	1.17±0.02^[6] `R`_☉
Luminosity	1.54±0.02^[6] `L`_☉
Surface gravity (log g)	4.35±0.01^[6] cgs
Temperature	5,944±18^[6] K
Metallicity [Fe/H]	0.265±0.008^[5] dex
Rotation	18.0 d^[7]
Rotational velocity (v sin i)	1.35±0.5^[8] km/s
Age	3.1±0.4^[6] Gyr

Other designations
164 G. Hya, BD−11 2670, HD 82943, HIP 47007, SAO 155312^[9]
Database references
SIMBAD	data

HD 82943 information

and 27 Related for: HD 82943 information

HD 82943

HD 82943 b

HD 82943 c

List of multiplanetary systems

HD 37124

HD 37124 c

List of stars in Hydra

List of exoplanets detected by radial velocity

HD 37124 d

HD 37124 b

Abell 33

HD 96700

4 Equulei

Phi1 Hydrae

Mu Hydrae

Chi1 Hydrae

Phi2 Hydrae

Rho Hydrae

Chi2 Hydrae

Iota Hydrae

Upsilon1 Hydrae

Sigma Hydrae

Tau Hydrae

Omicron Hydrae

Theta Hydrae

Delta Hydrae

Tau1 Hydrae