Key parameters at a glance

A radius of 1.17 Earth radii
A mass of 1.69 Earth masses
Surface gravity around 1.24 g
An orbital period of 14.265 days
Semi-major axis 0.1196 AU
Equilibrium temperature 853 K (580 °C)
Distance from Earth 1,465.59 light-years
Earth Similarity Index 0.372
Travel time at Voyager 1 speed 25,845,594 years

Kepler-1955 b Planet Profile

Physical Specs

Radius

1.17 R⊕

Radius (Jupiter)

0.104 R♃

Mass

1.69 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.85 g/cm³

Surface Gravity

1.24 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.372

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

#143of 570

top 24.9%

This planet

1.17R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-500 b 1.17 R⊕ Kepler-1939 b 1.16 R⊕ Kepler-185 b 1.17 R⊕

Metric	Earth	Kepler-1955 b	Jupiter
Radius (R⊕)	1.00	1.17	11.21
Mass (M⊕)	1.00	1.69	317.83
Density (g/cm³)	5.51	5.85	1.33
Surface Gravity (g)	1.00	1.24	2.53
Insolation (S⊕)	1.00	114.30	0.037

Star Catalogue Identifiers

TIC

TIC 172372582

Gaia DR2

Gaia DR2 2075040537699996288

Gaia DR3

Gaia DR3 2075040537699996288

System

Kepler-1955

Percentile among Rocky Terrestrial cohort

Radius 1.167 R⊕ · percentile 75 / cohort 570

Mass 1.690 M⊕ · percentile 69 / cohort 570

Orbital period 14.27 d · percentile 87 / cohort 567

Distance 449.35 pc · percentile 58 / cohort 566

ESI 0.372 · percentile 54 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

14.265 days

Semi-major axis

0.1196 AU

Eccentricity

0.000

Inclination

89.29 °

Year Length

A year here lasts approximately 14.27 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1196 AU.

Transit Fingerprint

Depth

0.007 %

Duration

3.601 h

Impact parameter b

0.353

Rp / R★

0.007490

Transit midpoint (BJD)

2,454,976.2202

Photometric dip

Transit produces a flux drop of 66 ppm lasting ≈ 3.60 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007490

Semi-major axis / stellar radius

30.540

Impact parameter (b)

0.353

Transit mid-time (BJD)

2,454,976.2202

Angular separation (arcsec)

0.26600

Eq. Temperature

853K

(580 °C)

Insolation (S⊕)

114.30

Earth = 1.00

Earth Similarity (ESI)

0.372

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. 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-1955

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,825 K — hotter than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.291 R☉

Stellar Mass

1.049 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.237 dex

Stellar density

2.167 g/cm³

Metallicity ratio

[Fe/H]

Distance

449.35 parsec

Light-years 1,465.59 ly

V-band magnitude

12.61 mag

Voyager-speed travel 25,845,594 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.197 mas

Total Proper Motion

8.399 mas/yr

PM Right Ascension

-6.25 mas/yr

PM Declination

-5.61 mas/yr

Galactic Cartesian (pc)

x = 0.375 · y = -0.662 · z = 0.649

Equatorial (J2000)

RA 299.53476° · Dec 40.47775°

Galactic ℓ, b

75.838° · 5.840°

Ecliptic λ, β

317.052° · 59.187°

HTM-20 index

-729562490