Key parameters at a glance

A radius of 2.37 Earth radii
A mass of 5.40 Earth masses
Surface gravity around 0.96 g
An orbital period of 10.574 days
Semi-major axis 0.0953 AU
Equilibrium temperature 916 K (643 °C)
Distance from Earth 752.99 light-years
Earth Similarity Index 0.275
Travel time at Voyager 1 speed 13,279,033 years

2 siblings around Kepler-454

Kepler-454 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-454 b this	Sub-Neptune	2.37	5.40	10.574	916	2015
Kepler-454 c	Gas Giant	12.90	1,433.41	524.190	—	2015
Kepler-454 d	Gas Giant	13.30	734.18	4,073.000	—	2023

Kepler-454 b Planet Profile

Physical Specs

Radius

2.37 R⊕

Radius (Jupiter)

0.211 R♃

Mass

5.40 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.23 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.275

HZ Position Inner

Controversial No

Discovery

Year 2015

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1375of 1978

top 69.5%

This planet

2.37R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-81 c 2.37 R⊕ K2-18 b 2.37 R⊕ Kepler-125 b 2.37 R⊕

Metric	Earth	Kepler-454 b	Jupiter
Radius (R⊕)	1.00	2.37	11.21
Mass (M⊕)	1.00	5.40	317.83
Density (g/cm³)	5.51	2.23	1.33
Surface Gravity (g)	1.00	0.96	2.53
Insolation (S⊕)	1.00	117.70	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	5.400 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	5.286 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 121276638

Gaia DR2

Gaia DR2 2099541715513813504

Gaia DR3

Gaia DR3 2099541715513813504

System

Kepler-454

Percentile among Sub-Neptune cohort

Radius 2.370 R⊕ · percentile 30 / cohort 1978

Mass 5.400 M⊕ · percentile 14 / cohort 1978

Orbital period 10.57 d · percentile 36 / cohort 1946

Distance 230.87 pc · percentile 31 / cohort 1975

ESI 0.275 · percentile 22 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.574 days

Semi-major axis

0.0953 AU

Eccentricity

0.320

Inclination

87.90 °

Year Length

A year here lasts approximately 10.57 Earth days (2.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0953 AU.

Transit Fingerprint

Depth

0.030 %

Duration

1.726 h

Impact parameter b

0.929

Rp / R★

0.015743

Transit midpoint (BJD)

2,455,008.0676

Photometric dip

Transit produces a flux drop of 302 ppm lasting ≈ 1.73 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015743

Semi-major axis / stellar radius

18.293

Impact parameter (b)

0.929

RV semi-amplitude (K)

1.640 m/s

Transit mid-time (BJD)

2,455,008.0676

Angular separation (arcsec)

0.41300

Eq. Temperature

916K

(643 °C)

Insolation (S⊕)

117.70

Earth = 1.00

Earth Similarity (ESI)

0.275

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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

Gettel et al. 2016

Instrument

Kepler CCD Array

Publication

2016-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2015 at Kepler (12 shown).

Kepler-438 b · Rocky Terrestrial Kepler-445 d · Super-Earth Kepler-442 b · Super-Earth Kepler-439 b · Sub-Neptune Kepler-437 b · Sub-Neptune Kepler-440 b · Super-Earth KIC 8540376 c · Sub-Neptune Kepler-445 b · Super-Earth Kepler-446 d · Super-Earth Kepler-436 b · Sub-Neptune Kepler-445 c · Sub-Neptune Kepler-443 b · Sub-Neptune

Host System: Kepler-454

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,687 K — cooler than the Sun (5,778 K)

Estimated Age

5.25 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.066 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.32

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

1.199 g/cm³

Systemic radial velocity

-70.26 km/s

Rotational v·sin i

2.40 km/s

Metallicity ratio

[Fe/H]

Distance

230.87 parsec

Light-years 752.99 ly

V-band magnitude

11.57 mag

Voyager-speed travel 13,279,033 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

4.303 mas

Total Proper Motion

53.015 mas/yr

PM Right Ascension

21.85 mas/yr

PM Declination

48.30 mas/yr

Galactic Cartesian (pc)

x = 0.236 · y = -0.749 · z = 0.619

Equatorial (J2000)

RA 287.47865° · Dec 38.22908°

Galactic ℓ, b

69.441° · 13.054°

Ecliptic λ, β

298.127° · 59.973°

HTM-20 index

686175181