Planet GJ 618.1 b

Detailed information about planet GJ 618.1 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

GJ 618.1 b

Planet Status

Confirmed

Discovered in

2001

Publication Status

Published in a refereed paper

Update

2026-03-01

Mass

60.0

M_J 4 publications

Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs
Discovery of wide low and very low-mass binary systems using Virtual Observatory tools
Wide cool and ultracool companions to nearby stars from Pan-STARRS 1
Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B

Mass*sin(i)

—

Semi-Major Axis

1055.0 (\pm 5.0)

AU 3 publications

Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs
Wide cool and ultracool companions to nearby stars from Pan-STARRS 1
Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

—

Inclination

—

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

1875.0 (\pm 75.0)

K 1 publication

Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

WIL 3 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type L2.5. Wilson et al. (2001): provided mass range is 60-79 M_Jup, although astrometry seemingly points to a lower mass (30 M_Jup, cfr. Kervella et al. 2022).

No link

Star

Name

GJ 618.1

Distance

29.2084 (\pm 0.049)

pc 1 publication

The Revised TESS Input Catalog and Candidate Target List

Spectral type

M0V

Apparent magnitude V

10.7

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.633 (\pm 0.02)

M_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Age

0.5 Gyr 1 publication

Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B

Effective temperature

3935.0 (\pm 157.0)

K 1 publication

The Revised TESS Input Catalog and Candidate Target List

Radius

0.658 (\pm 0.019)

R_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Metallicity [Fe/H]

0.0 1 publication

Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

16:20:24.8

Dec₂₀₀₀

-04:16:02.3

Alternate Names

WIL 3, MCC 760

No remarks

No link

Simbad
Most recent references (ADS)

Planet GJ 618.1 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

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 GJ 618.1 b

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

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

The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results

Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs

Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly

The Revised TESS Input Catalog and Candidate Target List

Discovery of wide low and very low-mass binary systems using Virtual Observatory tools

Wide cool and ultracool companions to nearby stars from Pan-STARRS 1

New companions to nearby low-mass stars

The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)

The Brown Dwarf Kinematics Project. II. Details on Nine Wide Common Proper Motion Very Low Mass Companions to Nearby Stars

A sample of very young field L dwarfs and implications for the brown dwarf ``Lithium test'' at early ages

Finding benchmark brown dwarfs to probe the substellar initial mass function as a function of time

Three wide-separation L dwarf companions from the Two Micron All Sky Survey: Gliese 337C, Gliese 618.1B, and HD 89744B