Planet WISE 1217+16A b

Name WISE 1217+16A b
Discovered in 2012
Mass 22.0 (± 2.0) MJ
Semi-major axis 7.6 AU
Orbital period 47400.0 ( -11000.0 +80000.0 ) day
Eccentricity
ω
Tperi
Radius 0.96 (± 0.03) RJ
Inclination
Update March 5, 2015
Detection Method Imaging
Mass Detection Method
Radius Detection method
Molecules detectedCH4
H2O
H2
Primary transit
Secondary transit
Anomaly angle
impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature 450.0 K
Hottest point longitute
Geometric albedo
Surface gravity log(g/gH) 4.8
Alternate Names WISEPC J121756.91+162640.2B, WISE J1217+1626B

Observability Predictor

Remarks

Binary brown dwarf.

(Leggett et al. 2014): Spectral type Y0-0.5, with related molecules (in addition to those indicated above, NH3 absorption detected).

(Leggett et al. 2014): very thin or no chloride/sulfide cloud layers, with a sedimentation parameter fsed > 5.

Star

Name WISE 1217+16A
Distance 10.0 (± 2.0) pc
Spectral type T8.5
Apparent magnitude V 19.0
Mass 0.03 (± 0.005) MSun
Age 6.0 (± 2.0) Gyr
Effective temperature 575.0 (± 25.0) K
Radius 0.091 (± 0.004) RSun
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000 12:17:57.0
Dec2000 +16:26:40
Alternate Names
Planetary system 1 planet

Remarks

Binary brown dwarf

More data


Related publications

Resolved Spectroscopy of the T8.5 and Y0-0.5 Binary WISEPC J121756.91+162640.2AB
2014 LEGGETT S., LIU M., DUPUY T., MORLEY C., MARLEY M. & SAUMON D.
ApJ, 780, 62
paper   arxiv   ADS  

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects
2013 DUPUY T. & KRAUS A.
Science, 341, 1492
paper   arxiv   ADS  

Two Extraordinary Substellar Binaries at the T/Y Transition and the Y-band Fluxes of the Coolest Brown Dwarfs
2012 LIU M., DUPUY T., BOWLER B., LEGGETT S. & REST W.
ApJ, 758, 57
paper   arxiv   ADS