Planet PSO J318.5-22

Name PSO J318.5-22
Planet Status Confirmed
Discovered in 2018
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Update 2018-10-01
Detection Method Imaging
Mass Detection Method
Radius Detection 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 J318.5338-22.8603

System

Distance 24.6 (± 1.4) pc
RA2000 21:14:08.0
Dec2000 -22:51:36

Observability Predictor

Remarks

Liu et al. (2018) : J=16.7, spectral type = L7 -/+1. For an age = 12-4/+8 My, the temperature = 1160 (-40/+30) K, the radius = 1.53 (-0.03/+0.02) RJ and the mass = 6.5 (-1.0/+1.3) MJ. For an age = 10-100 My, the temperature is 1210 (-50,+40) K, the radius is 1.40 (-0.4+0.06) RJ and the mass = 12-/+3 MJ. PSO J318.5−22 is the first free-floating object with the colors, magnitudes, spectrum, luminosity, and mass that overlap the young dusty planets around HR 8799 and 2MASS J1207−39.

Related publications

Rotational spectral modulation of cloudless atmospheres for L/T Brown Dwarfs and Extrasolar Giant Planets
2020 TREMBLIN P., PHILLIPS M., EMERY A., BARAFFE I., LEW B. et al.
Astron. & Astrophys., 643, A23
paper  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  

The Extremely Red, Young L Dwarf PSO J318.5338-22.8603: A Free-floating Planetary-mass Analog to Directly Imaged Young Gas-giant Planets
2013 LIU M., MAGNIER E., DEACON N., ALLERS K., DUPUY T. et al.
ApJ. Letters, 777, L20
paper   arxiv   ADS