Key parameters at a glance

A radius of 9.18 Earth radii
A mass of 158.92 Earth masses
Surface gravity around 1.89 g
An orbital period of 1,047.836 days
Semi-major axis 2.0260 AU
Equilibrium temperature 206 K (-67 °C)
Distance from Earth 1,852.95 light-years
Earth Similarity Index 0.396
Travel time at Voyager 1 speed 32,676,731 years

Kepler-1654 b Planet Profile

Physical Specs

Radius

9.18 R⊕

Radius (Jupiter)

0.819 R♃

Mass

158.92 M⊕

Mass (Jupiter)

0.500 M♃

Density

1.20 g/cm³

Surface Gravity

1.89 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.396

HZ Position Outer

Controversial No

Discovery

Year 2018

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#71of 574

top 12.2%

This planet

9.18R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-1173 b 9.19 R⊕ HD 221416 b 9.17 R⊕ Kepler-702 b 9.17 R⊕

Metric	Earth	Kepler-1654 b	Jupiter
Radius (R⊕)	1.00	9.18	11.21
Mass (M⊕)	1.00	158.92	317.83
Density (g/cm³)	5.51	1.20	1.33
Surface Gravity (g)	1.00	1.89	2.53
Insolation (S⊕)	1.00	0.30	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	158.915 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 123417316

Gaia DR2

Gaia DR2 2105415302330571008

Gaia DR3

Gaia DR3 2105415302330571008

System

Kepler-1654

Percentile among Neptune-like cohort

Radius 9.180 R⊕ · percentile 88 / cohort 574

Mass 158.915 M⊕ · percentile 94 / cohort 574

Orbital period 1,047.84 d · percentile 98 / cohort 524

Distance 568.12 pc · percentile 59 / cohort 572

ESI 0.396 · percentile 72 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

1,047.836 days

Semi-major axis

2.0260 AU

Eccentricity

0.260

Inclination

89.98 °

Year Length

A year here lasts about 2.87 Earth years on a mildly elliptical path at a mean orbital distance of 2.0260 AU.

Transit Fingerprint

Depth

0.510 %

Duration

22.992 h

Impact parameter b

0.114

Rp / R★

0.071380

Transit midpoint (BJD)

2,455,375.1341

Photometric dip

Transit produces a flux drop of 5,096 ppm lasting ≈ 22.99 h.

Extended Orbital Architecture

Planet / star radius ratio

0.071380

Semi-major axis / stellar radius

370.300

Impact parameter (b)

0.114

RV semi-amplitude (K)

2.700 m/s

Transit mid-time (BJD)

2,455,375.1341

Long. of periastron (ω)

81.00°

Angular separation (arcsec)

3.57000

Eq. Temperature

206K

(-67 °C)

Insolation (S⊕)

0.30

Earth = 1.00

Earth Similarity (ESI)

0.396

0 = alien, 1 = Earth-identical

Beyond the outer HZ boundary (too cold) — surface water would be frozen.

Discovery Paper

Primary reference

Beichman et al. 2018

Instrument

Kepler CCD Array

Publication

2018-04

Observation locale

Space

Discovery cohort

Planets confirmed in 2018 at Kepler (6 shown).

Kepler-411 d · Sub-Neptune KOI-3680 b · Gas Giant Kepler-411 e · Sub-Neptune Kepler-1656 b · Neptune-like Kepler-1655 b · Sub-Neptune Kepler-730 c · Super-Earth

Host System: Kepler-1654

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,597 K — cooler than the Sun (5,778 K)

Estimated Age

5.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.179 R☉

Stellar Mass

1.011 M☉

Metallicity [Fe/H]

-0.09

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.876 g/cm³

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

568.12 parsec

Light-years 1,852.95 ly

V-band magnitude

13.50 mag

Voyager-speed travel 32,676,731 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.731 mas

Total Proper Motion

16.157 mas/yr

PM Right Ascension

-16.14 mas/yr

PM Declination

-0.75 mas/yr

Galactic Cartesian (pc)

x = 0.151 · y = -0.698 · z = 0.700

Equatorial (J2000)

RA 282.18569° · Dec 44.43446°

Galactic ℓ, b

73.867° · 19.069°

Ecliptic λ, β

292.607° · 66.920°

HTM-20 index

-204342261