Planet SDSS J1557+0916 b

Detailed information about planet SDSS J1557+0916 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

SDSS J1557+0916 b

Planet Status

Confirmed

Discovered in

2011

Publication Status

Published in a refereed paper

Update

2025-08-26

Mass

66.0 (\begin{matrix} + 5.0 \\ - 7.0 \end{matrix})

M_J 2 publications

Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B
Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B

Mass*sin(i)

—

Semi-Major Axis

0.003248 (\pm 9.28e-05)

AU 2 publications

Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B
A circumbinary debris disk in a polluted white dwarf system

Orbital Period

0.094714708333 (\pm 8.33e-08)

day 2 publications

Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B
A circumbinary debris disk in a polluted white dwarf system

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

1.054 (\pm 0.242)

R_J 1 publication

A circumbinary debris disk in a polluted white dwarf system

Inclination

80.0 (\pm 3.0)

deg 2 publications

Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B
A circumbinary debris disk in a polluted white dwarf system

Detection Method

Radial Velocity

Mass Meas. Method

Radial Velocity

Radius Meas. Method

Primary Transit

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

2000.0 (\pm 250.0)

K 1 publication

A circumbinary debris disk in a polluted white dwarf system

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

SDSS J155720.78+091624.7 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type L4 or L5 (Amaro et al. 2024). Although Farihi et al. (2017) announced the detection of SDSS J1557+0916 b, first clues of a substellar companion around the white dwarf SDSS J1557+0916 were provided by Steele et al. (2011) along with a rough estimate of the spectral type (L4).

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