Planet VHS 1256-1257 b
| Name | VHS 1256-1257 b | ||
| Planet Status | Confirmed | ||
| Discovered in | 2015 | ||
| Mass | 19.0 (± 5.0) MJ |  |
+ |
| Mass*sin(i) | — | ||
| Semi-Major Axis | 179.0 (± 9.0) AU | |
|
| Orbital Period | — | ||
| Eccentricity | — | ||
| ω | — | ||
| Tperi | — | ||
| Radius | — | ||
| Inclination | — | ||
| Update | 2022-09-02 | ||
| Detection Method | Imaging | ||
| Mass Detection Method | Astrometry | ||
| Radius Detection Method | — | ||
| Primary transit | — | ||
| Secondary transit | — | ||
| λ | — | ||
| Impact Parameter b | — | ||
| Time Vr=0 | — | ||
| Velocity Semiamplitude K | — | ||
| Calculated temperature | — | ||
| Measured temperature | 1240.0 K | |
+ |
| Hottest point longitude | — | ||
| Geometric albedo | — | ||
| Surface gravity log(g/gH) | — | ||
| Alternate Names | — |
Star
VHS 1256-1257| Name | VHS 1256-1257 | ||
| Distance | 12.7 (± 1.0) pc | |
|
| Spectral type | M7.5 | ||
| Apparent magnitude V | 17.8 | ||
| Mass | 0.073 ( -0.02 +0.015 ) MSun | |
|
| Age | 0.2 ( -0.1 +0.05 ) Gyr | |
|
| Effective temperature | 2620.0 (± 140.0) K | |
|
| Radius | — | ||
| Metallicity [Fe/H] | — | ||
| Detected Disc | — | ||
| Magnetic Field | — | ||
| RA2000 | 12:56:02.0 | ||
| Dec2000 | -12:57:24 | ||
| Alternate Names | |||
| Planetary system | 1 planet |
Remarks
Rich et al., 2016 : the central star is a binary, whose components are nearly equal in brightness and separated by 0.106" +/- 0.001".More data
- Simbad
- Most recent references (ADS)
Atmospheric parameters
Temperatures
| Data Source | Type | Result Value | Result Figure | Notes | Reference |
Molecules
| Molecule | Data Source | Type | Result Value | Result Figure | Notes | Reference |
| CH4 | Measurements | Detected | 2022 - MILES B. | |||
| CO | Measurements | Detected | 2022 - MILES B. | |||
| CO2 | Measurements | Detected | 2022 - MILES B. | |||
| H2O | Measurements | Detected | 2022 - MILES B. | |||
| K | Measurements | Detected | 2022 - MILES B. | |||
| Na | Measurements | Detected | 2022 - MILES B. | |||
Observability Predictor 
Remarks
Rich et al., 2016 : the central star is a binary, whose components are nearly equal in brightness and separated by 0.106" +/- 0.001".Related publications
X-SHYNE: X-shooter spectra of young exoplanet analogs. I. A medium-resolution 0.65-2.5μm one-shot spectrum of VHS 1256-1257 b
2023
PETRUS S., CHAUVIN G., BONNEFOY M., TREMBLIN P., CHARNAY B. et al.
Astron. & Astrophys., 670, L9
paper arxiv
The JWST Early Release Science Program for the Direct Imaging & Spectroscopy of Exoplanetary Systems
2022
HINKLEY S., CARTER A., RAY Sh., SKEMER A., BILLER B. et al.
PASP, 134, 095003
paper arxiv
Roaring Storms in the Planetary-Mass Companion VHS 1256-1257 b: Hubble Space Telescope Multi-epoch Monitoring Reveals Vigorous Evolution in an Ultra-cool Atmosphere
2022
ZHOU Y., BOWLER B., APAI D., KATARIA T., MORLEY C. et al.
Astron. J., 164, 239
paper arxiv
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b
2022
MILES B., BILLER B., PATAPIS P., WORTHEN K., RICKMAN E. et al.
Astron. J., submitted
arxiv
Moderate-Resolution K-Band Spectroscopy of the Substellar Companion VHS 1256 b
2022
HOCH K., KONOPACKY Q., BARMAN T., THEISSEN Ch., BROCK L. et al.
Astron. J., 164, 155
paper arxiv
The Parallax of VHS J1256-1257 from CFHT and Pan-STARRS 1
2020
DUPUY T., LIU M., MAGNIER M., BEST W., BARAFFE I. et al.
Res. Notes AAS, accepted
arxiv
Methane in Analogs of Young Directly Imaged Exoplanets
2018
MILES B., SKEMER A., BARMAN T., ALLERS K. & STONE J.
ApJ, 869, 18
paper arxiv
Thermal Infrared Imaging and Atmospheric Modeling of VHS J125601.92-125723.9 b: Evidence for Moderately Thick Clouds and Equilibrium Carbon Chemistry in a Hierarchical Triple System
2016
RICH, E., CURRIE, T., WISNIEWSKI, J., HASHIMOTO, J., BRANDT, T. & 3additional authors
ApJ, 830, 114
arxiv
paper
ADS
Adaptive Optics imaging of VHS 1256-1257: A Low Mass Companion to a Brown Dwarf Binary System
2016
STONE J., SKEMER A., KRATTER K., DUPUY T., CLOE L. et al.
ApJ, accepted
arxiv
Discovery of a young planetary mass companion to the nearby M dwarf VHS J125601.92-125723.9
2015
GAUZA B., BEJAR V., PEREZ-GARRIDO A., ZAPATERO-OSORIO M.-R., LODIEU N. et al.
ApJ, 804
paper arxiv ADS
