Planet Ross 458 (AB)b

Detailed information about planet Ross 458 (AB)b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

Ross 458 (AB)b

Planet Status

Confirmed

Discovered in

2010

Update

2024-08-12

Mass

11.3 (\begin{matrix} + 4.5 \\ - 4.5 \end{matrix})

M_J 1 publication

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

Mass*sin(i)

—

Semi-Major Axis

1168.0 AU 1 publication

A new benchmark T8-9 brown dwarf and a couple of new mid-T dwarfs from the UKIDSS DR5+ LAS

Orbital Period

—

Eccentricity

—

ω

—

T_peri

—

Radius

1.07 (\begin{matrix} + 0.07 \\ - 0.07 \end{matrix})

R_J 1 publication

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

Inclination

—

Detection Method

Imaging

Mass Meas. Method

—

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

677.0

K 1 publication

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

4.35

1 publication

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

Alternate Names

Ross 458 C, HIP 63510 C, GJ 494 C, WISEPC J130041.65+122114.6

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Reference
CH4
CH4	Measurements	Detected	2010 - BURGASSER A.
H2
H2	Measurements	Detected	2010 - BURGASSER A.
H2O
H2O	Measurements	Detected	2010 - BURGASSER A.
K
K	Measurements	Detected	2010 - BURGASSER A.

Note: the values of radius, mass, log(g) and effective temperature are given by the average of the results of Dupuy & Kraus (2013) computed for the ages of 180 and 800 Myr. The error is simply the deviation between the two values (the deviation is 20K for the effective temperature and 0.25 for log(g) ).

Note: there is agreement that the spectrum is best reproduced by models with clouds. Morley et al. (2012) propose sulfite clouds with f_sed=3, expected in T dwarfs conditions.

(Burningham et al. 2011): spectral type T8.5p±0.5 (where p stands for peculiarity, in this case an unusually enhanved K band flux).
See also Circumbinary Planets webpage.

No link

Star

Name

Ross 458

Distance

11.7 (\pm 0.2)

pc 1 publication

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

Spectral type

M0.5V

Apparent magnitude V

9.76

Mass

0.6 (\pm 0.08)

M_Sun 1 publication

The Ultra Cool Brown Dwarf Companion of WD 0806-661B: Age, Mass, and Formation Mechanism

Age

0.475 (\pm 0.325)

Gyr 1 publication

The Ultra Cool Brown Dwarf Companion of WD 0806-661B: Age, Mass, and Formation Mechanism

Effective temperature

—

Radius

—

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

13:00:47.0

Dec₂₀₀₀

+12:22:33.0

Alternate Names

DT Virginis, HIP 63510, GI 494

Binary star. The secondary component has a M7.5 spectral type with mass 0.06-0.09 M_sun. The two red dwarfs are separated by 5 AU and orbit with a period of 14.5 yr.

No link

Simbad
Most recent references (ADS)

Planet Ross 458 (AB)b

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 4 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Planet Ross 458 (AB)b

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 4 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

The Carbon-to-oxygen Ratio in Cool Brown Dwarfs and Giant Exoplanets. I. The Benchmark Late-T Dwarfs GJ 570D, HD 3651B, and Ross 458C

The puzzle of the formation of T8 dwarf Ross 458c

Numerical quantification of the wind properties of cool main sequence stars

A Pilot Radio Search for Magnetic Activity in Directly Imaged Exoplanets

Host star metallicity of directly imaged wide-orbit planets: implications for planet formation

Cloud Atlas: Rotational Spectral Modulations and potential Sulfide Clouds in the Planetary-mass, Late T-type Companion Ross 458C

Imaging Extrasolar Giant Planets

The Brown-dwarf Atmosphere Monitoring (BAM) Project II: Multi-epoch monitoring of extremely cool brown dwarfs

Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs

Distances, Luminosities, and Temperatures of the Coldest Known Substellar Objects

76 T dwarfs from the UKIDSS LAS: benchmarks, kinematics and an updated space density

Neglected Clouds in T and Y Dwarf Atmospheres

Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function

Direct Imaging of Extra-solar Planets - Homogeneous Comparison of Detected Planets and Candidates

The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs

The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition

The Ultra Cool Brown Dwarf Companion of WD 0806-661B: Age, Mass, and Formation Mechanism

The properties of the T8.5p dwarf Ross 458C

Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data

A Search for High Proper Motion T Dwarfs with PAN-STARRS1 + 2MASS + WISE

A new benchmark T8-9 brown dwarf and a couple of new mid-T dwarfs from the UKIDSS DR5+ LAS

Clouds in the Coldest Brown Dwarfs: Fire Spectroscopy of Ross 458C

Hip 63510C, Hip 73786B, and nine new isolated high proper motion T dwarf candidates from UKIDSS DR6 and SDSS DR7