Key parameters at a glance

A radius of 1.01 Earth radii
A mass of 1.01 Earth masses
Surface gravity around 0.99 g
An orbital period of 5.991 days
Semi-major axis 0.0636 AU
Equilibrium temperature 987 K (714 °C)
Distance from Earth 880.33 light-years
Earth Similarity Index 0.329
Travel time at Voyager 1 speed 15,524,692 years

Kepler-1911 b Planet Profile

Physical Specs

Radius

1.01 R⊕

Radius (Jupiter)

0.090 R♃

Mass

1.01 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.37 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.329

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

#324of 570

top 56.7%

This planet

1.01R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1947 b 1.01 R⊕ Kepler-282 b 1.01 R⊕ Kepler-398 c 1.01 R⊕

Metric	Earth	Kepler-1911 b	Jupiter
Radius (R⊕)	1.00	1.01	11.21
Mass (M⊕)	1.00	1.01	317.83
Density (g/cm³)	5.51	5.37	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	223.93	0.037

Star Catalogue Identifiers

TIC

TIC 171971636

Gaia DR2

Gaia DR2 2075162102458709632

Gaia DR3

Gaia DR3 2075162102458709632

System

Kepler-1911

Percentile among Rocky Terrestrial cohort

Radius 1.011 R⊕ · percentile 43 / cohort 570

Mass 1.010 M⊕ · percentile 37 / cohort 570

Orbital period 5.99 d · percentile 61 / cohort 567

Distance 269.91 pc · percentile 38 / cohort 566

ESI 0.329 · percentile 46 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.991 days

Semi-major axis

0.0636 AU

Eccentricity

0.000

Inclination

84.42 °

Year Length

A year here lasts approximately 5.99 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0636 AU.

Transit Fingerprint

Depth

0.007 %

Duration

1.661 h

Impact parameter b

0.253

Rp / R★

0.007878

Transit midpoint (BJD)

2,454,967.5413

Photometric dip

Transit produces a flux drop of 72 ppm lasting ≈ 1.66 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007878

Semi-major axis / stellar radius

9.710

Impact parameter (b)

0.253

Transit mid-time (BJD)

2,454,967.5413

Angular separation (arcsec)

0.23600

Eq. Temperature

987K

(714 °C)

Insolation (S⊕)

223.93

Earth = 1.00

Earth Similarity (ESI)

0.329

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-1911

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,721 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.972 R☉

Stellar Mass

0.954 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.442 dex

Stellar density

0.483 g/cm³

Metallicity ratio

[Fe/H]

Distance

269.91 parsec

Light-years 880.33 ly

V-band magnitude

12.25 mag

Voyager-speed travel 15,524,692 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

3.676 mas

Total Proper Motion

7.928 mas/yr

PM Right Ascension

4.66 mas/yr

PM Declination

6.41 mas/yr

Galactic Cartesian (pc)

x = 0.367 · y = -0.654 · z = 0.662

Equatorial (J2000)

RA 299.30356° · Dec 41.44102°

Galactic ℓ, b

76.579° · 6.484°

Ecliptic λ, β

317.471° · 60.143°

HTM-20 index

-239594570