Planet VHS 1256-1257 b

Detailed information about planet VHS 1256-1257 b and its parameters.

Planet

Name
VHS 1256-1257 b
Planet Status
Confirmed
Discovered in
2015
Publication
Status
Published in a refereed paper
Update
2025-04-26
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
Angular distance
ω
Tperi
Radius
Inclination
Detection Method
Imaging
Mass Meas. Method
Astrometry
Radius Meas. Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names
VHS J125601.92-125723.9 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference
C
Measurements Detected 2023 - GANDHI S.
CH4
Measurements Detected 2024 - PETRUS S.
Measurements Detected 2023 - MILES B.
CO
Measurements Detected 2024 - PETRUS S.
Measurements Detected 2023 - MILES B.
CO2
Measurements Detected 2023 - MILES B.
H2O
Measurements Detected 2023 - MILES B.
K
Measurements Detected 2023 - MILES B.
Na
Measurements Detected 2023 - MILES B.
O
Measurements Detected 2023 - GANDHI S.

Poon et al. (2024): The planet shows tilted rotation axis like Solar planet Uranus (ip = 90 ± 18°).

No link

Star

Name
VHS 1256-1257
Distance
Spectral type
M7.5
Apparent magnitude V
17.8
Apparent magnitude I
Apparent magnitude J
Apparent magnitude H
Apparent magnitude K
Mass
Age
Effective temperature
Radius
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000
12:56:02.0
Dec2000
-12:57:24.0
Alternate Names
VHS J125601.92-125723.9

Rich et al. (2016): The central star is a binary, whose components are nearly equal in brightness and separated by 0.106" +/- 0.001".

No link