Planet 2MASS J1559+4403 Ab

Detailed information about planet 2MASS J1559+4403 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
2MASS J1559+4403 Ab
Planet Status
Confirmed
Discovered in
2024
Update
2024-08-30
Mass
24.5 ( +2.0 -2.7 ) MJ
Mass*sin(i)
24.5 ( +2.0 -2.7 ) MJ
Semi-Major Axis
0.0938 ( ± 0.001 ) AU
Orbital Period
13.976 ( ± 0.001 ) day
Eccentricity
0.35 ( ± 0.03 )
ω
148.0 ( ± 2.0 ) deg
Tperi
—
Radius
—
Inclination
—
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
—
Primary transit
—
Secondary transit
—
λ
—
Impact Parameter b
—
Time Vr=0
—
Velocity Semiamplitude K
11000.0 ( ± 500.0 ) m/s
Calculated temperature
—
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
2MASS J155947+440359 Ab
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
2MASS J1559+4403 A
Distance
35.0 pc
Spectral type
M2.0V
Apparent magnitude V
11.8
Mass
0.54 MSun
Age
0.125 ( ± 0.075 ) Gyr
Effective temperature
—
Radius
—
Metallicity [Fe/H]
—
Detected Disc
—
Magnetic Field
—
RA2000
15:59:47.0
Dec2000
+44:04:00.0
Alternate Names
2MASS J155947+440359

A very low-mass companion star (spT M8, m = 0.1 MSol), originally supposed to be a brown dwarf, lies 197.3 AUs away (Janson et al. 2012, Messina et al. 2024).

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