Key parameters at a glance

A radius of 1.09 Earth radii
A mass of 1.33 Earth masses
Surface gravity around 1.11 g
An orbital period of 2.392 days
Semi-major axis 0.0306 AU
Equilibrium temperature 1,031 K (758 °C)
Distance from Earth 2,490.73 light-years
Earth Similarity Index 0.309
Travel time at Voyager 1 speed 43,924,011 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1909 b Planet Profile

Physical Specs

Radius

1.09 R⊕

Radius (Jupiter)

0.097 R♃

Mass

1.33 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.61 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.309

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#239of 570

top 41.8%

This planet

1.09R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

K2-190 c 1.09 R⊕ TOI-5720 b 1.09 R⊕ Kepler-212 b 1.09 R⊕

Metric	Earth	Kepler-1909 b	Jupiter
Radius (R⊕)	1.00	1.09	11.21
Mass (M⊕)	1.00	1.33	317.83
Density (g/cm³)	5.51	5.61	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	266.01	0.037

Star Catalogue Identifiers

TIC

TIC 159573063

Gaia DR2

Gaia DR2 2101944835616987136

Gaia DR3

Gaia DR3 2101944835616987136

System

Kepler-1909

Percentile among Rocky Terrestrial cohort

Radius 1.092 R⊕ · percentile 58 / cohort 570

Mass 1.330 M⊕ · percentile 53 / cohort 570

Orbital period 2.39 d · percentile 28 / cohort 567

Distance 763.66 pc · percentile 83 / cohort 566

ESI 0.309 · percentile 41 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.392 days

Semi-major axis

0.0306 AU

Eccentricity

0.000

Inclination

88.15 °

Year Length

A year here lasts approximately 2.39 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0306 AU.

Transit Fingerprint

Depth

0.019 %

Duration

1.916 h

Impact parameter b

0.037

Rp / R★

0.012434

Transit midpoint (BJD)

2,454,966.0785

Photometric dip

Transit produces a flux drop of 189 ppm lasting ≈ 1.92 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012434

Semi-major axis / stellar radius

9.669

Impact parameter (b)

0.037

Transit mid-time (BJD)

2,454,966.0785

Angular separation (arcsec)

0.04010

Eq. Temperature

1,031K

(758 °C)

Insolation (S⊕)

266.01

Earth = 1.00

Earth Similarity (ESI)

0.309

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1909

Spectral Class

K-type orange

Effective Temperature

4,935 K — cooler than the Sun (5,778 K)

Estimated Age

13.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.685 R☉

Stellar Mass

0.663 M☉

Metallicity [Fe/H]

-0.42

Extended Stellar Properties

Surface gravity (log g)

4.589 dex

Stellar density

2.652 g/cm³

Metallicity ratio

[Fe/H]

Distance

763.66 parsec

Light-years 2,490.73 ly

V-band magnitude

15.93 mag

Voyager-speed travel 43,924,011 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.281 mas

Total Proper Motion

11.023 mas/yr

PM Right Ascension

9.12 mas/yr

PM Declination

-6.19 mas/yr

Galactic Cartesian (pc)

x = 0.263 · y = -0.689 · z = 0.675

Equatorial (J2000)

RA 290.88941° · Dec 42.45963°

Galactic ℓ, b

74.497° · 12.480°

Ecliptic λ, β

305.862° · 63.321°

HTM-20 index

400024547