Planet LSPM J1446 b

Detailed information about planet LSPM J1446 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

LSPM J1446 b

Planet Status

Confirmed

Discovered in

2025

Publication Status

—

Update

2025-09-18

Mass

59.8 (\begin{matrix} + 1.5 \\ - 1.4 \end{matrix})

M_J 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Mass*sin(i)

—

Semi-Major Axis

4.3 (\pm 0.06)

AU 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Orbital Period

7124.8 (\begin{matrix} + 284.7 \\ - 277.4 \end{matrix})

day 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Eccentricity

0.122 (\begin{matrix} + 0.014 \\ - 0.015 \end{matrix})

1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Angular distance

0.23 arcsec

ω

109.0 (\begin{matrix} + 2.4 \\ - 3.3 \end{matrix})

deg 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

T_peri

—

Radius

— 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Inclination

85.3 (\pm 1.5)

deg 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Detection Method

Imaging

Mass Meas. Method

Spectrum

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

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

No remarks

No link

Star

Name

LSPM J1446+4633

Distance

18.58 pc 2 publications

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633
The Revised TESS Input Catalog and Candidate Target List

Spectral type

M4.5V

Apparent magnitude V

14.8

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.151 (\begin{matrix} + 0.023 \\ - 0.021 \end{matrix})

M_Sun 1 publication

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

Age

—

Effective temperature

3160.0 (\pm 157.0)

K 1 publication

The Revised TESS Input Catalog and Candidate Target List

Radius

0.199 (\pm 0.0059)

R_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

14:46:00.7

Dec₂₀₀₀

+46:33:24.8

Alternate Names

G 200-58, LHS 2973

No remarks

No link

Simbad
Most recent references (ADS)

Planet LSPM J1446 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks No remark

Other web pages No page

More data 2 references

Planet LSPM J1446 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks No remark

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks No remark

Other web pages No page

More data 2 references

Related publications

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633

The Revised TESS Input Catalog and Candidate Target List