Key parameters at a glance

A radius of 15.68 Earth radii
A mass of 215.81 Earth masses
Surface gravity around 0.88 g
An orbital period of 4.166 days
Semi-major axis 0.0525 AU
Equilibrium temperature 1,377 K (1104 °C)
Distance from Earth 614.49 light-years
Earth Similarity Index 0.079
Travel time at Voyager 1 speed 10,836,547 years

KELT-10 b Planet Profile

Physical Specs

Radius

15.68 R⊕

Radius (Jupiter)

1.399 R♃

Mass

215.81 M⊕

Mass (Jupiter)

0.679 M♃

Density

0.31 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.079

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility KELT-South

Telescope Mamiya 645 80mm f/1.9

Size rank in cohort

Rank by radius

#187of 1771

top 10.5%

This planet

15.68R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J12073346-3932539 b 15.69 R⊕ TOI-1295 b 15.69 R⊕ HD 143811 AB b 15.69 R⊕

Metric	Earth	KELT-10 b	Jupiter
Radius (R⊕)	1.00	15.68	11.21
Mass (M⊕)	1.00	215.81	317.83
Density (g/cm³)	5.51	0.31	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	600.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	215.807 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	215.807 M⊕	Lower bound from radial-velocity fitting.
Computed mass	215.870 M⊕	Model-computed mass (e.g. from mass-radius relation).

Star Catalogue Identifiers

TIC

TIC 269217040

Gaia DR2

Gaia DR2 6710517793025165696

Gaia DR3

Gaia DR3 6710517793025165696

System

KELT-10

Percentile among Gas Giant cohort

Radius 15.681 R⊕ · percentile 89 / cohort 1771

Mass 215.807 M⊕ · percentile 23 / cohort 1747

Orbital period 4.17 d · percentile 31 / cohort 1533

Distance 188.40 pc · percentile 49 / cohort 1759

ESI 0.079 · percentile 18 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.166 days

Semi-major axis

0.0525 AU

Eccentricity

—

Inclination

88.61 °

Year Length

A year here lasts approximately 4.17 Earth days (1.1% of a terrestrial year) at a mean orbital distance of 0.0525 AU.

Transit Fingerprint

Depth

1.416 %

Duration

3.744 h

Impact parameter b

0.230

Rp / R★

0.119000

Transit midpoint (BJD)

2,457,066.7205

Photometric dip

Transit produces a flux drop of 14,160 ppm lasting ≈ 3.74 h.

Extended Orbital Architecture

Planet / star radius ratio

0.119000

Semi-major axis / stellar radius

9.340

Impact parameter (b)

0.230

RV semi-amplitude (K)

80.000 m/s

Transit mid-time (BJD)

2,457,066.7205

Sky-projected obliquity (λ)

-5.20°

Angular separation (arcsec)

0.27900

Eq. Temperature

1,377K

(1104 °C)

Insolation (S⊕)

600.00

Earth = 1.00

Earth Similarity (ESI)

0.079

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Kuhn et al. 2016

Instrument

Apogee 4K CCD Sensor

Publication

2016-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at KELT-South (2 shown).

KELT-15 b · Gas Giant KELT-14 b · Gas Giant

Host System: KELT-10

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,948 K — hotter than the Sun (5,778 K)

Estimated Age

4.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.209 R☉

Stellar Mass

1.112 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.319 dex

Stellar density

0.889 g/cm³

Systemic radial velocity

31.96 km/s

Rotational v·sin i

2.58 km/s

Metallicity ratio

[Fe/H]

Distance

188.40 parsec

Light-years 614.49 ly

V-band magnitude

10.62 mag

Voyager-speed travel 10,836,547 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

5.280 mas

Total Proper Motion

15.647 mas/yr

PM Right Ascension

1.44 mas/yr

PM Declination

-15.58 mas/yr

Galactic Cartesian (pc)

x = 0.171 · y = -0.660 · z = -0.731

Equatorial (J2000)

RA 284.54838° · Dec -47.00331°

Galactic ℓ, b

349.659° · -20.572°

Ecliptic λ, β

280.813° · -24.109°

HTM-20 index

-840345679