Planet ASASSN-24fw Ab

Detailed information about planet ASASSN-24fw Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

ASASSN-24fw Ab

Planet Status

Candidate

Discovered in

2025

Publication Status

Published in a refereed paper

Update

2025-11-05

Mass

—

Mass*sin(i)

3.4

M_J 2 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Semi-Major Axis

14.0 AU 1 publication

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star

Orbital Period

16060.0 day 1 publication

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star

Eccentricity

0.88 (\pm 0.07)

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star

Angular distance

—

ω

—

T_peri

—

Radius

—

Inclination

—

Detection Method

Primary Transit

Mass Meas. Method

Theoretical

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

Zakamska et al. (2025): A circumplanetary disk as large as 0.7 AUs surrounds the substellar occulter.
Shah et al. (2025). A second transit model points to an occulting substellar companion, either gas giant or brown dwarf, surrounded by a 0.17 AUs-wide circumplanetary disk or rings. Near-infrared spectra taken during dimming show enhanced infrared excess and spectral features consistent with an M8-type companion.

No link

Star

Name

ASASSN-24fw A

Distance

1044.0 (\pm 17.0)

pc 2 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Spectral type

F8IV

Apparent magnitude V

—

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.47 (\pm 0.05)

M_Sun 2 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Age

2.75 (\pm 0.24)

Gyr 2 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Effective temperature

6146.0 (\pm 99.0)

K 3 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Radius

2.28 (\pm 0.08)

R_Sun 2 publications

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
The nature of ASASSN-24fw's occultation: modelling the event as dimming by optically thick rings around a sub-stellar companion

Metallicity [Fe/H]

0.0 (\pm 0.2)

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

07:05:19.0

Dec₂₀₀₀

+06:12:19.4

Alternate Names

J0705+0612, Gaia DR3 3152916838954800512

An faint companion star, likely an M dwarf, lies 3,000 AUs away (Shah et al. 2025).

No link

Simbad
Most recent references (ADS)