Planet eta Cas Ab

Detailed information about planet eta Cas Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
eta Cas Ab
Planet Status
Retracted
Discovered in
2025
Publication
Status
Published in a refereed paper
Update
2025-09-17
Mass
0.069 MJ
Mass*sin(i)
—
Semi-Major Axis
—
Orbital Period
868.0 day
Eccentricity
—
Angular distance
—
ω
—
Tperi
—
Radius
—
Inclination
—
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
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Primary transit
—
Secondary transit
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λ
—
Impact Parameter b
—
Time Vr=0
—
Velocity Semiamplitude K
—
Calculated temperature
—
Measured temperature
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Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
—
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

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Star

Name
eta Cas A
Distance
5.923 ( ± 0.006 ) pc
Spectral type
F9/G0V
Apparent magnitude V
3.44
Apparent magnitude I
—
Apparent magnitude J
—
Apparent magnitude H
—
Apparent magnitude K
—
Mass
1.026 ( +0.007 -0.0069 ) MSun
Age
5.4 ( ± 0.9 ) Gyr
Effective temperature
6012.0 ( +25.0 -22.0 ) K
Radius
1.034 ( ± 0.0027 ) RSun
Metallicity [Fe/H]
-0.26 ( ± 0.03 )
Detected Disc
—
Magnetic Field
—
RA2000
00:49:06.3
Dec2000
+57:48:54.6
Alternate Names
24 Cas, HD 4614

Nearby binary system with a late K dwarf secondary (eta Cas B, spT K7V) in eccentric orbit (a = 70.55 AUs, e = 0.49).

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