Planet HATS-55 Ab

Detailed information about planet HATS-55 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
HATS-55 Ab
Planet Status
Confirmed
Discovered in
2018
Publication
Status
Published in a refereed paper
Update
2025-09-04
Mass
0.921 ( ± 0.76 ) MJ
Mass*sin(i)
—
Semi-Major Axis
0.05412 ( +0.00014 -0.0018 ) AU
Orbital Period
—
Eccentricity
0.092 ( +0.0 -0.092 )
Angular distance
—
ω
—
Tperi
—
Radius
1.251 ( ± 0.026 ) RJ
Inclination
86.32 ( ± 0.084 ) deg
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
—
Secondary transit
—
λ
—
Impact Parameter b
0.662 ( ± 0.012 )
Time Vr=0
—
Velocity Semiamplitude K
102.8 ( ± 8.4 ) m/s
Calculated temperature
1367.0 ( ± 10.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
TOI-1923.01
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

1 Sep 2025: See also Planets in Binaries webpage.

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Star

Name
HATS-55 A
Distance
623.6 ( ± 6.2 ) pc
Spectral type
F8V
Apparent magnitude V
—
Apparent magnitude I
—
Apparent magnitude J
—
Apparent magnitude H
—
Apparent magnitude K
—
Mass
1.1955 ( +0.0091 -0.0119 ) MSun
Age
0.4 ( +0.2 -0.13 ) Gyr
Effective temperature
6214.0 ( ± 36.0 ) K
Radius
1.126 ( ± 0.011 ) RSun
Metallicity [Fe/H]
0.108 ( +0.046 -0.03 )
Detected Disc
—
Magnetic Field
—
RA2000
07:37:08.0
Dec2000
-32:45:20.0
Alternate Names

Eeles-Nolle & Armstrong (2025): A faint companion star, likely an M dwarf (Gaia DR3 5592019523590297344, G = 18.7), lies 15.3 arcseconds away (9,550 AUs at 624 pc).

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