Key parameters at a glance

A radius of 2.36 Earth radii
A mass of 6.17 Earth masses
Surface gravity around 1.11 g
An orbital period of 8.458 days
Semi-major axis 0.0875 AU
Equilibrium temperature 1,117 K (844 °C)
Distance from Earth 4,762.20 light-years
Earth Similarity Index 0.226
Travel time at Voyager 1 speed 83,981,459 years

1 sibling around Kepler-1154

Kepler-1154 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-1154 b	Sub-Neptune	2.34	6.08	5.186	1,314	2016
Kepler-1154 c this	Sub-Neptune	2.36	6.17	8.458	1,117	2016

Kepler-1154 c Planet Profile

Physical Specs

Radius

2.36 R⊕

Radius (Jupiter)

0.211 R♃

Mass

6.17 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.58 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.226

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

#1395of 1978

top 70.5%

This planet

2.36R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1022 b 2.36 R⊕ Kepler-482 b 2.36 R⊕ Kepler-184 b 2.36 R⊕

Metric	Earth	Kepler-1154 c	Jupiter
Radius (R⊕)	1.00	2.36	11.21
Mass (M⊕)	1.00	6.17	317.83
Density (g/cm³)	5.51	2.58	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	339.57	0.037

Star Catalogue Identifiers

TIC

TIC 169561256

Gaia DR2

Gaia DR2 2073641344741406464

Gaia DR3

Gaia DR3 2073641344741406464

System

Kepler-1154

Percentile among Sub-Neptune cohort

Radius 2.360 R⊕ · percentile 29 / cohort 1978

Mass 6.170 M⊕ · percentile 28 / cohort 1978

Orbital period 8.46 d · percentile 28 / cohort 1946

Distance 1,460.10 pc · percentile 92 / cohort 1975

ESI 0.226 · percentile 11 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

8.458 days

Semi-major axis

0.0875 AU

Eccentricity

0.000

Inclination

87.50 °

Year Length

A year here lasts approximately 8.46 Earth days (2.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0875 AU.

Transit Fingerprint

Depth

0.026 %

Duration

3.068 h

Impact parameter b

0.163

Rp / R★

0.014927

Transit midpoint (BJD)

2,454,970.0593

Photometric dip

Transit produces a flux drop of 259 ppm lasting ≈ 3.07 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014927

Semi-major axis / stellar radius

21.110

Impact parameter (b)

0.163

Transit mid-time (BJD)

2,454,970.0593

Angular separation (arcsec)

0.05990

Eq. Temperature

1,117K

(844 °C)

Insolation (S⊕)

339.57

Earth = 1.00

Earth Similarity (ESI)

0.226

0 = alien, 1 = Earth-identical

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

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-1154

Spectral Class

F-type yellow-white

Effective Temperature

6,327 K — hotter than the Sun (5,778 K)

Estimated Age

2.29 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.430 R☉

Stellar Mass

1.260 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.230 dex

Stellar density

0.689 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,460.10 parsec

Light-years 4,762.20 ly

V-band magnitude

14.95 mag

Voyager-speed travel 83,981,459 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

0.657 mas

Total Proper Motion

2.989 mas/yr

PM Right Ascension

-1.18 mas/yr

PM Declination

-2.75 mas/yr

Galactic Cartesian (pc)

x = 0.354 · y = -0.681 · z = 0.641

Equatorial (J2000)

RA 297.47712° · Dec 39.87723°

Galactic ℓ, b

74.516° · 6.891°

Ecliptic λ, β

313.765° · 59.212°

HTM-20 index

-1746573191