Planet zet Her Ab

Detailed information about planet zet Her Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
zet Her Ab
Planet Status
Candidate
Discovered in
2001
Update
2024-07-06
Mass
50.0 MJ
Mass*sin(i)
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Semi-Major Axis
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Orbital Period
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Eccentricity
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ω
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Tperi
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Radius
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Inclination
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Detection Method
Radial Velocity
Mass Meas. Method
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Radius Meas. Method
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Primary transit
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Secondary transit
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λ
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Impact Parameter b
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Time Vr=0
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Velocity Semiamplitude K
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Calculated temperature
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Measured temperature
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Hottest point longitude
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Geometric albedo
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Surface gravity log(g/gH)
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Alternate Names
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Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

The presence of a third body in Zeta Herculis binary system is suspected since early XX Century and increasingly investigated in late 80s-early 90s (e.g. Baize 1976, McCarthy 1983, Lebreton et al. 1993). Morel et al. (2001) infer a mass less than 50 MJup, compatible either with a brown dwarf or a giant planet. Orbital period is assumed to be equal or less than 12 years.

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Star

Name
zet Her A
Distance
10.79564 pc
Spectral type
G0IV
Apparent magnitude V
2.8
Mass
1.45 ( ± 0.01 ) MSun
Age
3.38 Gyr
Effective temperature
5795.47 K
Radius
2.688 RSun
Metallicity [Fe/H]
0.082 ( ± 0.0136 )
Detected Disc
—
Magnetic Field
—
RA2000
16:41:17.2
Dec2000
+31:36:09.8
Alternate Names
40 Her

Zeta Herculis forms a binary system with a late G to early K dwarf companion star 15 AUs away in eccentric orbit (P = 34.45 ± 0.005 yr, e = 0.462 ± 0.002, i = 131°).

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