Planet KELT-21 Ab

Detailed information about planet KELT-21 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

KELT-21 Ab

Planet Status

Confirmed

Discovered in

2017

Publication Status

—

Update

2024-08-05

Mass

3.88 (\pm 0.05)

M_J 1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Mass*sin(i)

—

Semi-Major Axis

0.0536 (\pm 0.0016)

AU 2 publications

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties
Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Orbital Period

3.6127732 (\pm 3.7e-06)

day

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

1.584 (\pm 0.034)

R_J 1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Inclination

87.1 (\begin{matrix} + 0.6 \\ - 0.5 \end{matrix})

deg 1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Detection Method

Primary Transit

Mass Meas. Method

Radial Velocity

Radius Meas. Method

Primary Transit

Primary transit

2459420.24239 (\pm 0.00022)

JD 1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Secondary transit

—

λ

—

Impact Parameter b

0.36 (\begin{matrix} + 0.05 \\ - 0.07 \end{matrix})

1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Time V_r=0

—

Velocity Semiamplitude K

400.0 (\begin{matrix} + 0.0 \\ - 400.0 \end{matrix})

m/s 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Calculated temperature

2025.0 (\pm 30.0)

K 1 publication

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

HD 332124 b, TOI-1198.01

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

KELT-21 A

Distance

415.0 (\pm 50.0)

pc 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Spectral type

A8V

Apparent magnitude V

10.5

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.458 (\pm 0.029)

M_Sun 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Age

1.6 (\pm 0.1)

Gyr 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Effective temperature

7598.0 (\pm 84.0)

K 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Radius

1.638 (\pm 0.034)

R_Sun 1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Metallicity [Fe/H]

-0.405 (\pm 0.033)

1 publication

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

20:19:12.0

Dec₂₀₀₀

+32:34:52.0

Alternate Names

HD 332124, TOI-1198

Part of a triple system including two M dwarf companion stars ∼500 AUs away. The low-mass pair is separated by ∼20 AUs.

No link

Simbad
Most recent references (ADS)

Planet KELT-21 Ab

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 Some remarks

Other web pages No page

More data 2 references

Planet KELT-21 Ab

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 Some remarks

Other web pages No page

More data 2 references

Related publications

Cross-correlation transmission spectroscopy of ultra-hot Jupiters WASP-189b, HAT-P-57b, KELT-17b, and KELT-21b with GIANO-B

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

High-resolution transmission spectroscopy study of ultra-hot Jupiters HAT-P-57b, KELT-17b, KELT-21b, KELT-7b, MASCARA-1b, and WASP-189b

Significant Transit Timing Offsets of 31 Hot Jupiters

KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System

KELT: The Kilodegree Extremely Little Telescope, a Survey for Exoplanets Transiting Bright, Hot Stars