Key parameters at a glance

A radius of 1.28 Earth radii
A mass of 2.18 Earth masses
Surface gravity around 1.33 g
An orbital period of 2.852 days
Semi-major axis 0.0305 AU
Equilibrium temperature 621 K (348 °C)
Distance from Earth 945.52 light-years
Earth Similarity Index 0.504
Travel time at Voyager 1 speed 16,674,297 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1124 b Planet Profile

Physical Specs

Radius

1.28 R⊕

Radius (Jupiter)

0.114 R♃

Mass

2.18 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.71 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.504

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1117of 1176

top 94.9%

This planet

1.28R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-776 b 1.28 R⊕ TOI-431 b 1.28 R⊕ TOI-270 b 1.28 R⊕

Metric	Earth	Kepler-1124 b	Jupiter
Radius (R⊕)	1.00	1.28	11.21
Mass (M⊕)	1.00	2.18	317.83
Density (g/cm³)	5.51	5.71	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	50.78	0.037

Star Catalogue Identifiers

TIC

TIC 120963454

Gaia DR2

Gaia DR2 2099183583961614208

Gaia DR3

Gaia DR3 2099183583961614208

System

Kepler-1124

Percentile among Super-Earth cohort

Radius 1.280 R⊕ · percentile 4 / cohort 1176

Mass 2.180 M⊕ · percentile 5 / cohort 1176

Orbital period 2.85 d · percentile 20 / cohort 1164

Distance 289.90 pc · percentile 31 / cohort 1171

ESI 0.504 · percentile 73 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.852 days

Semi-major axis

0.0305 AU

Eccentricity

0.000

Inclination

89.45 °

Year Length

A year here lasts approximately 2.85 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0305 AU.

Transit Fingerprint

Depth

0.140 %

Duration

0.706 h

Impact parameter b

0.295

Rp / R★

0.035370

Transit midpoint (BJD)

2,454,965.0443

Photometric dip

Transit produces a flux drop of 1,403 ppm lasting ≈ 0.71 h.

Extended Orbital Architecture

Planet / star radius ratio

0.035370

Semi-major axis / stellar radius

10.700

Impact parameter (b)

0.295

Transit mid-time (BJD)

2,454,965.0443

Angular separation (arcsec)

0.10500

Eq. Temperature

621K

(348 °C)

Insolation (S⊕)

50.78

Earth = 1.00

Earth Similarity (ESI)

0.504

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1124

Spectral Class

M-type red dwarf

Effective Temperature

3,658 K — cooler than the Sun (5,778 K)

Estimated Age

3.39 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.340 R☉

Stellar Mass

0.350 M☉

Metallicity [Fe/H]

-0.59

Extended Stellar Properties

Surface gravity (log g)

4.930 dex

Stellar density

5.163 g/cm³

Metallicity ratio

[Fe/H]

Distance

289.90 parsec

Light-years 945.52 ly

V-band magnitude

16.75 mag

Voyager-speed travel 16,674,297 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

3.421 mas

Total Proper Motion

6.349 mas/yr

PM Right Ascension

-0.82 mas/yr

PM Declination

6.30 mas/yr

Galactic Cartesian (pc)

x = 0.225 · y = -0.756 · z = 0.614

Equatorial (J2000)

RA 286.59425° · Dec 37.89128°

Galactic ℓ, b

68.831° · 13.550°

Ecliptic λ, β

296.621° · 59.806°

HTM-20 index

742248296