Key parameters at a glance

A radius of 4.62 Earth radii
A mass of 19.30 Earth masses
Surface gravity around 0.90 g
An orbital period of 10.161 days
Semi-major axis 0.0918 AU
Equilibrium temperature 904 K (631 °C)
Distance from Earth 4,083.90 light-years
Earth Similarity Index 0.216
Travel time at Voyager 1 speed 72,019,522 years

Kepler-1989 b Planet Profile

Physical Specs

Radius

4.62 R⊕

Radius (Jupiter)

0.412 R♃

Mass

19.30 M⊕

Mass (Jupiter)

0.061 M♃

Density

1.08 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.216

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#444of 574

top 77.2%

This planet

4.62R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-1136 d 4.63 R⊕ Kepler-564 b 4.63 R⊕ K2-406 b 4.60 R⊕

Metric	Earth	Kepler-1989 b	Jupiter
Radius (R⊕)	1.00	4.62	11.21
Mass (M⊕)	1.00	19.30	317.83
Density (g/cm³)	5.51	1.08	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	157.97	0.037

Star Catalogue Identifiers

TIC

TIC 159450616

Gaia DR2

Gaia DR2 2126119862195142272

Gaia DR3

Gaia DR3 2126119862195142272

System

Kepler-1989

Percentile among Neptune-like cohort

Radius 4.620 R⊕ · percentile 23 / cohort 574

Mass 19.300 M⊕ · percentile 26 / cohort 574

Orbital period 10.16 d · percentile 37 / cohort 524

Distance 1,252.13 pc · percentile 80 / cohort 572

ESI 0.216 · percentile 31 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

10.161 days

Semi-major axis

0.0918 AU

Eccentricity

0.000

Inclination

87.78 °

Year Length

A year here lasts approximately 10.16 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0918 AU.

Transit Fingerprint

Depth

0.165 %

Duration

3.163 h

Impact parameter b

0.716

Rp / R★

0.039948

Transit midpoint (BJD)

2,455,005.0007

Photometric dip

Transit produces a flux drop of 1,654 ppm lasting ≈ 3.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.039948

Semi-major axis / stellar radius

18.520

Impact parameter (b)

0.716

Transit mid-time (BJD)

2,455,005.0007

Angular separation (arcsec)

0.07330

Eq. Temperature

904K

(631 °C)

Insolation (S⊕)

157.97

Earth = 1.00

Earth Similarity (ESI)

0.216

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Valizadegan et al. 2023

Instrument

Kepler CCD Array

Publication

2023-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-1989

Spectral Class

F-type yellow-white

Effective Temperature

6,032 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.060 R☉

Stellar Mass

0.999 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.387 dex

Stellar density

1.165 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,252.13 parsec

Light-years 4,083.90 ly

V-band magnitude

14.29 mag

Voyager-speed travel 72,019,522 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

0.770 mas

Total Proper Motion

11.296 mas/yr

PM Right Ascension

3.78 mas/yr

PM Declination

-10.65 mas/yr

Galactic Cartesian (pc)

x = 0.254 · y = -0.672 · z = 0.696

Equatorial (J2000)

RA 290.73519° · Dec 44.09126°

Galactic ℓ, b

75.962° · 13.279°

Ecliptic λ, β

306.829° · 64.901°

HTM-20 index

625667802