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 5.944 days
Semi-major axis 0.0563 AU
Equilibrium temperature 674 K (401 °C)
Distance from Earth 1,175.69 light-years
Earth Similarity Index 0.481
Travel time at Voyager 1 speed 20,733,257 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1956 b Planet Profile

Physical Specs

Radius

1.09 R⊕

Radius (Jupiter)

0.097 R♃

Mass

1.32 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.61 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.481

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

#251of 570

top 43.9%

This planet

1.09R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

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

Metric	Earth	Kepler-1956 b	Jupiter
Radius (R⊕)	1.00	1.09	11.21
Mass (M⊕)	1.00	1.32	317.83
Density (g/cm³)	5.51	5.61	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	48.82	0.037

Star Catalogue Identifiers

TIC

TIC 27233725

Gaia DR2

Gaia DR2 2135052298959703296

Gaia DR3

Gaia DR3 2135052298959703296

System

Kepler-1956

Percentile among Rocky Terrestrial cohort

Radius 1.089 R⊕ · percentile 56 / cohort 570

Mass 1.320 M⊕ · percentile 51 / cohort 570

Orbital period 5.94 d · percentile 60 / cohort 567

Distance 360.47 pc · percentile 48 / cohort 566

ESI 0.481 · percentile 69 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.944 days

Semi-major axis

0.0563 AU

Eccentricity

0.000

Inclination

89.54 °

Year Length

A year here lasts approximately 5.94 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0563 AU.

Transit Fingerprint

Depth

0.030 %

Duration

1.847 h

Impact parameter b

0.121

Rp / R★

0.015359

Transit midpoint (BJD)

2,454,968.2590

Photometric dip

Transit produces a flux drop of 301 ppm lasting ≈ 1.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015359

Semi-major axis / stellar radius

24.500

Impact parameter (b)

0.121

Transit mid-time (BJD)

2,454,968.2590

Angular separation (arcsec)

0.15600

Eq. Temperature

674K

(401 °C)

Insolation (S⊕)

48.82

Earth = 1.00

Earth Similarity (ESI)

0.481

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-1956

Spectral Class

K-type orange

Effective Temperature

4,391 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.682 R☉

Stellar Mass

0.671 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.598 dex

Stellar density

7.876 g/cm³

Metallicity ratio

[Fe/H]

Distance

360.47 parsec

Light-years 1,175.69 ly

V-band magnitude

15.99 mag

Voyager-speed travel 20,733,257 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.746 mas

Total Proper Motion

21.843 mas/yr

PM Right Ascension

-17.27 mas/yr

PM Declination

13.38 mas/yr

Galactic Cartesian (pc)

x = 0.268 · y = -0.586 · z = 0.765

Equatorial (J2000)

RA 294.62085° · Dec 49.89422°

Galactic ℓ, b

82.515° · 13.409°

Ecliptic λ, β

319.025° · 69.179°

HTM-20 index

-487388235