Key parameters at a glance

A radius of 4.29 Earth radii
A mass of 17.00 Earth masses
Surface gravity around 0.92 g
An orbital period of 1.902 days
Semi-major axis 0.0302 AU
Equilibrium temperature 1,346 K (1073 °C)
Distance from Earth 2,252.19 light-years
Earth Similarity Index 0.143
Travel time at Voyager 1 speed 39,717,346 years

Kepler-554 b Planet Profile

Physical Specs

Radius

4.29 R⊕

Radius (Jupiter)

0.383 R♃

Mass

17.00 M⊕

Mass (Jupiter)

0.054 M♃

Density

1.18 g/cm³

Surface Gravity

0.92 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.143

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

#499of 574

top 86.8%

This planet

4.29R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-1803 c 4.29 R⊕ MOA-2011-BLG-262L b 4.29 R⊕ Kepler-1995 b 4.28 R⊕

Metric	Earth	Kepler-554 b	Jupiter
Radius (R⊕)	1.00	4.29	11.21
Mass (M⊕)	1.00	17.00	317.83
Density (g/cm³)	5.51	1.18	1.33
Surface Gravity (g)	1.00	0.92	2.53
Insolation (S⊕)	1.00	877.95	0.037

Star Catalogue Identifiers

TIC

TIC 27843707

Gaia DR2

Gaia DR2 2135507634212719104

Gaia DR3

Gaia DR3 2135507634212719104

System

Kepler-554

Percentile among Neptune-like cohort

Radius 4.290 R⊕ · percentile 13 / cohort 574

Mass 17.000 M⊕ · percentile 18 / cohort 574

Orbital period 1.90 d · percentile 1 / cohort 524

Distance 690.53 pc · percentile 64 / cohort 572

ESI 0.143 · percentile 11 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

1.902 days

Semi-major axis

0.0302 AU

Eccentricity

0.000

Inclination

89.03 °

Year Length

A year here lasts approximately 1.90 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0302 AU.

Transit Fingerprint

Depth

0.234 %

Duration

2.208 h

Impact parameter b

0.043

Rp / R★

0.043494

Transit midpoint (BJD)

2,455,003.4498

Photometric dip

Transit produces a flux drop of 2,344 ppm lasting ≈ 2.21 h.

Extended Orbital Architecture

Planet / star radius ratio

0.043494

Semi-major axis / stellar radius

6.889

Impact parameter (b)

0.043

Transit mid-time (BJD)

2,455,003.4498

Angular separation (arcsec)

0.04380

Eq. Temperature

1,346K

(1073 °C)

Insolation (S⊕)

877.95

Earth = 1.00

Earth Similarity (ESI)

0.143

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-554

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,447 K — cooler than the Sun (5,778 K)

Estimated Age

5.62 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.920 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.160 g/cm³

Metallicity ratio

[Fe/H]

Distance

690.53 parsec

Light-years 2,252.19 ly

V-band magnitude

14.49 mag

Voyager-speed travel 39,717,346 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.419 mas

Total Proper Motion

14.284 mas/yr

PM Right Ascension

10.43 mas/yr

PM Declination

9.76 mas/yr

Galactic Cartesian (pc)

x = 0.278 · y = -0.559 · z = 0.781

Equatorial (J2000)

RA 296.40690° · Dec 51.35819°

Galactic ℓ, b

84.382° · 13.060°

Ecliptic λ, β

323.905° · 69.899°

HTM-20 index

-234236458