Key parameters at a glance

A radius of 1.09 Earth radii
A mass of 1.32 Earth masses
Surface gravity around 1.11 g
An orbital period of 3.744 days
Semi-major axis 0.0498 AU
Equilibrium temperature 1,328 K (1055 °C)
Distance from Earth 1,951.43 light-years
Earth Similarity Index 0.233
Travel time at Voyager 1 speed 34,413,532 years

Kepler-889 b Planet Profile

Physical Specs

Radius

1.09 R⊕

Radius (Jupiter)

0.097 R♃

Mass

1.32 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.60 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.233

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

#240of 570

top 41.9%

This planet

1.09R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-5720 b 1.09 R⊕ Kepler-115 b 1.09 R⊕ Kepler-212 b 1.09 R⊕

Metric	Earth	Kepler-889 b	Jupiter
Radius (R⊕)	1.00	1.09	11.21
Mass (M⊕)	1.00	1.32	317.83
Density (g/cm³)	5.51	5.60	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	954.59	0.037

Star Catalogue Identifiers

TIC

TIC 26474039

Gaia DR2

Gaia DR2 2130131297229656832

Gaia DR3

Gaia DR3 2130131297229656832

System

Kepler-889

Percentile among Rocky Terrestrial cohort

Radius 1.090 R⊕ · percentile 56 / cohort 570

Mass 1.320 M⊕ · percentile 51 / cohort 570

Orbital period 3.74 d · percentile 40 / cohort 567

Distance 598.31 pc · percentile 73 / cohort 566

ESI 0.233 · percentile 21 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.744 days

Semi-major axis

0.0498 AU

Eccentricity

0.000

Inclination

89.01 °

Year Length

A year here lasts approximately 3.74 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0498 AU.

Transit Fingerprint

Depth

0.007 %

Duration

2.949 h

Impact parameter b

0.938

Rp / R★

0.007908

Transit midpoint (BJD)

2,454,966.5606

Photometric dip

Transit produces a flux drop of 73 ppm lasting ≈ 2.95 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007908

Semi-major axis / stellar radius

9.750

Impact parameter (b)

0.938

Transit mid-time (BJD)

2,454,966.5606

Angular separation (arcsec)

0.08320

Eq. Temperature

1,328K

(1055 °C)

Insolation (S⊕)

954.59

Earth = 1.00

Earth Similarity (ESI)

0.233

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-889

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,961 K — hotter than the Sun (5,778 K)

Estimated Age

3.98 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.250 R☉

Stellar Mass

1.140 M☉

Metallicity [Fe/H]

0.19

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.390 g/cm³

Metallicity ratio

[Fe/H]

Distance

598.31 parsec

Light-years 1,951.43 ly

V-band magnitude

13.00 mag

Voyager-speed travel 34,413,532 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.643 mas

Total Proper Motion

25.158 mas/yr

PM Right Ascension

16.93 mas/yr

PM Declination

18.61 mas/yr

Galactic Cartesian (pc)

x = 0.232 · y = -0.589 · z = 0.774

Equatorial (J2000)

RA 291.46745° · Dec 50.75956°

Galactic ℓ, b

82.438° · 15.599°

Ecliptic λ, β

314.931° · 70.866°

HTM-20 index

198111545