Key parameters at a glance

A radius of 1.14 Earth radii
A mass of 1.57 Earth masses
Surface gravity around 1.20 g
An orbital period of 6.387 days
Semi-major axis 0.0617 AU
Equilibrium temperature 811 K (538 °C)
Distance from Earth 1,563.15 light-years
Earth Similarity Index 0.394
Travel time at Voyager 1 speed 27,566,061 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1959 b Planet Profile

Physical Specs

Radius

1.14 R⊕

Radius (Jupiter)

0.102 R♃

Mass

1.57 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.78 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.394

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

#168of 570

top 29.3%

This planet

1.14R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-320 b 1.14 R⊕ Kepler-303 c 1.14 R⊕ Kepler-1456 b 1.14 R⊕

Metric	Earth	Kepler-1959 b	Jupiter
Radius (R⊕)	1.00	1.14	11.21
Mass (M⊕)	1.00	1.57	317.83
Density (g/cm³)	5.51	5.78	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	102.25	0.037

Star Catalogue Identifiers

TIC

TIC 272173269

Gaia DR2

Gaia DR2 2079749303627032448

Gaia DR3

Gaia DR3 2079749303627032448

System

Kepler-1959

Percentile among Rocky Terrestrial cohort

Radius 1.143 R⊕ · percentile 71 / cohort 570

Mass 1.570 M⊕ · percentile 65 / cohort 570

Orbital period 6.39 d · percentile 63 / cohort 567

Distance 479.26 pc · percentile 61 / cohort 566

ESI 0.394 · percentile 59 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.387 days

Semi-major axis

0.0617 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 6.39 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0617 AU.

Transit Fingerprint

Depth

0.023 %

Duration

1.243 h

Impact parameter b

0.060

Rp / R★

0.013575

Transit midpoint (BJD)

2,454,964.5272

Photometric dip

Transit produces a flux drop of 230 ppm lasting ≈ 1.24 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013575

Semi-major axis / stellar radius

39.700

Impact parameter (b)

0.060

Transit mid-time (BJD)

2,454,964.5272

Angular separation (arcsec)

0.12900

Eq. Temperature

811K

(538 °C)

Insolation (S⊕)

102.25

Earth = 1.00

Earth Similarity (ESI)

0.394

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. 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-1959

Spectral Class

K-type orange

Effective Temperature

5,071 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.811 R☉

Stellar Mass

0.768 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.505 dex

Stellar density

32.343 g/cm³

Metallicity ratio

[Fe/H]

Distance

479.26 parsec

Light-years 1,563.15 ly

V-band magnitude

14.80 mag

Voyager-speed travel 27,566,061 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.058 mas

Total Proper Motion

5.187 mas/yr

PM Right Ascension

4.22 mas/yr

PM Declination

3.01 mas/yr

Galactic Cartesian (pc)

x = 0.312 · y = -0.638 · z = 0.704

Equatorial (J2000)

RA 296.02230° · Dec 44.73267°

Galactic ℓ, b

78.278° · 10.192°

Ecliptic λ, β

315.545° · 64.113°

HTM-20 index

-1977832514