Planet HD 221356 Ab

Detailed information about planet HD 221356 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HD 221356 Ab

Planet Status

Confirmed

Discovered in

2012

Publication Status

—

Update

2024-08-21

Mass

42.1 (\begin{matrix} + 5.9 \\ - 3.0 \end{matrix})

M_J 2 publications

The Gaia ultracool dwarf sample - V: the ultracool dwarf companion catalogue
A new L dwarf member of the moderately metal poor triple system HD 221356

Mass*sin(i)

—

Semi-Major Axis

317.0 AU 1 publication

A new L dwarf member of the moderately metal poor triple system HD 221356

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

—

Inclination

—

Detection Method

Imaging, Astrometry

Mass Meas. Method

Astrometry

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

GZA 1 b, HD 221356 D

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type L1 ± 1. Fourth component of a multiple system including a low-mass pair 11,900 AUs away composed of a late M dwarf (HD 221356 B or KO 3 B, spT M8V) and an early L dwarf (HD 221356 C o KO 3 C, spT L3V) separated about 15 AUs each other.
Initial mass estimate for the fourth component was 0.08 M_Sol (Gauza et al. 2012). Recent astrometric measurement provide a lower mass compatible with a brown dwarf (Baig et al. 2024).

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