Key parameters at a glance

A radius of 1.23 Earth radii
A mass of 2.04 Earth masses
Surface gravity around 1.35 g
An orbital period of 10.435 days
Semi-major axis 0.0878 AU
Equilibrium temperature 759 K (486 °C)
Distance from Earth 1,319.44 light-years
Earth Similarity Index 0.413
Travel time at Voyager 1 speed 23,268,288 years

2 siblings around Kepler-271

Kepler-271 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-271 d	Rocky Terrestrial	0.66	0.22	5.250	954	2016
Kepler-271 c	Rocky Terrestrial	0.95	0.81	7.411	850	2014
Kepler-271 b this	Rocky Terrestrial	1.23	2.04	10.435	759	2014

Kepler-271 b Planet Profile

Physical Specs

Radius

1.23 R⊕

Radius (Jupiter)

0.110 R♃

Mass

2.04 M⊕

Mass (Jupiter)

0.006 M♃

Density

6.02 g/cm³

Surface Gravity

1.35 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.413

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#17of 570

top 2.8%

This planet

1.23R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-252 b 1.23 R⊕ Kepler-54 c 1.23 R⊕ Kepler-197 c 1.23 R⊕

Metric	Earth	Kepler-271 b	Jupiter
Radius (R⊕)	1.00	1.23	11.21
Mass (M⊕)	1.00	2.04	317.83
Density (g/cm³)	5.51	6.02	1.33
Surface Gravity (g)	1.00	1.35	2.53
Insolation (S⊕)	1.00	75.96	0.037

Star Catalogue Identifiers

TIC

TIC 164414655

Gaia DR2

Gaia DR2 2105343799713595904

Gaia DR3

Gaia DR3 2105343799713595904

System

Kepler-271

Percentile among Rocky Terrestrial cohort

Radius 1.230 R⊕ · percentile 94 / cohort 570

Mass 2.040 M⊕ · percentile 86 / cohort 570

Orbital period 10.44 d · percentile 80 / cohort 567

Distance 404.54 pc · percentile 54 / cohort 566

ESI 0.413 · percentile 61 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

10.435 days

Semi-major axis

0.0878 AU

Eccentricity

0.000

Inclination

89.57 °

Year Length

A year here lasts approximately 10.44 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0878 AU.

Transit Fingerprint

Depth

0.021 %

Duration

3.405 h

Impact parameter b

0.510

Rp / R★

0.013466

Transit midpoint (BJD)

2,454,967.8233

Photometric dip

Transit produces a flux drop of 210 ppm lasting ≈ 3.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013466

Semi-major axis / stellar radius

23.300

Impact parameter (b)

0.510

Transit mid-time (BJD)

2,454,967.8233

Angular separation (arcsec)

0.21700

Eq. Temperature

759K

(486 °C)

Insolation (S⊕)

75.96

Earth = 1.00

Earth Similarity (ESI)

0.413

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

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-271

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,555 K — cooler than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.870 R☉

Stellar Mass

0.900 M☉

Metallicity [Fe/H]

-0.13

Extended Stellar Properties

Surface gravity (log g)

4.520 dex

Stellar density

1.360 g/cm³

Metallicity ratio

[Fe/H]

Distance

404.54 parsec

Light-years 1,319.44 ly

V-band magnitude

13.58 mag

Voyager-speed travel 23,268,288 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.443 mas

Total Proper Motion

27.419 mas/yr

PM Right Ascension

-9.29 mas/yr

PM Declination

-25.80 mas/yr

Galactic Cartesian (pc)

x = 0.161 · y = -0.698 · z = 0.698

Equatorial (J2000)

RA 283.00293° · Dec 44.28411°

Galactic ℓ, b

73.928° · 18.468°

Ecliptic λ, β

293.969° · 66.645°

HTM-20 index

335653924