Planet HD 278555 b

Detailed information about planet HD 278555 b and its parameters.

Planet parameters Publications Observability Predictor Exo3D

Planet

Name
HD 278555 b
Planet Status
Confirmed
Discovered in
2026
Publication
Status
—
Update
2026-08-17
Mass
0.84 ( ± 0.1 ) MJ
Mass*sin(i)
—
Semi-Major Axis
0.1985 ( ± 0.04 ) AU
Orbital Period
28.842438 ( ± 4.5e-05 ) day
Eccentricity
0.085 ( ± 0.05 )
Angular distance
—
ω
115.7 ( +0.7 -0.34 ) deg
Tperi
—
Radius
0.98 ( ± 0.036 ) RJ
Inclination
—
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
2458797.1589 ( ± 0.002 ) JD
Secondary transit
—
λ
—
Impact Parameter b
0.24 ( ± 0.18 )
Time Vr=0
—
Velocity Semiamplitude K
48.3 ( ± 5.5 ) m/s
Calculated temperature
853.0 ( ± 16.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
TIC 137966491 b
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
HD 278555
Distance
282.3 ( ± 1.3 ) pc
Spectral type
F8IV
Apparent magnitude V
11.0
Apparent magnitude I
—
Apparent magnitude J
—
Apparent magnitude H
—
Apparent magnitude K
—
Mass
1.255 ( +0.075 -0.073 ) MSun
Age
3.8 ( +2.3 -1.1 ) Gyr
Effective temperature
6185.0 ( ± 100.0 ) K
Radius
1.624 ( +0.052 -0.05 ) RSun
Metallicity [Fe/H]
-0.15 ( ± 0.2 )
Detected Disc
—
Magnetic Field
—
RA2000
03:21:28.3
Dec2000
+32:54:49.7
Alternate Names
TIC 137966491

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