Planet TOI-5646 b

Detailed information about planet TOI-5646 b and its parameters.

Planet parameters Publications Observability Predictor Exo3D

Planet

Name

TOI-5646 b

Planet Status

Confirmed

Discovered in

2026

Publication Status

—

Update

2026-08-26

Mass

0.1444 (\pm 0.0142)

M_J 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Mass*sin(i)

—

Semi-Major Axis

0.0427 (\pm 0.0)

AU 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Orbital Period

2.4277027 (\pm 2.5e-06)

day 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

0.589 (\pm 0.027)

R_J 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Inclination

84.8 (\pm 0.6)

deg 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Detection Method

Primary Transit

Mass Meas. Method

Radial Velocity

Radius Meas. Method

Primary Transit

Primary transit

2459687.3808 (\pm 0.001)

Secondary transit

—

λ

—

Impact Parameter b

0.46 (\pm 0.0)

1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Time V_r=0

— 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Velocity Semiamplitude K

17.34 (\pm 1.6)

m/s 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Calculated temperature

1935.0 (\pm 30.0)

K 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

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

TOI-5646

Distance

414.7 (\begin{matrix} + 5.5 \\ - 5.3 \end{matrix})

pc 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Spectral type

F8IV

Apparent magnitude V

11.38

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.418 (\begin{matrix} + 0.068 \\ - 0.079 \end{matrix})

M_Sun 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Age

2.82 (\begin{matrix} + 1.0 \\ - 0.69 \end{matrix})

Gyr 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Effective temperature

6122.0 (\begin{matrix} + 64.0 \\ - 61.0 \end{matrix})

K 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Radius

1.837 (\begin{matrix} + 0.075 \\ - 0.066 \end{matrix})

R_Sun 1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Metallicity [Fe/H]

0.32 (\pm 0.06)

1 publication

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

13:13:47.3

Dec₂₀₀₀

+05:42:07.7

Alternate Names

TIC 366804698, TYC 0305-00246-1, 2MASS J13134732+0542077

No remarks

No link

Simbad
Most recent references (ADS)

Planet TOI-5646 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 TOI-5646 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

The Hot Neptune Initiative (HONEI) III. An ultra-hot super Neptune orbiting the metal-rich subgiant star TOI-5646: the largest host for a desert dweller