Key parameters at a glance

A radius of 1.48 Earth radii
A mass of 2.79 Earth masses
Surface gravity around 1.27 g
An orbital period of 3.026 days
Semi-major axis 0.0423 AU
Equilibrium temperature 1,484 K (1211 °C)
Distance from Earth 2,713.59 light-years
Earth Similarity Index 0.192
Travel time at Voyager 1 speed 47,854,132 years

Kepler-1271 b Planet Profile

Physical Specs

Radius

1.48 R⊕

Radius (Jupiter)

0.132 R♃

Mass

2.79 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.73 g/cm³

Surface Gravity

1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.192

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#784of 1176

top 66.6%

This planet

1.48R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-123 c 1.48 R⊕ Kepler-1275 b 1.48 R⊕ Kepler-208 e 1.48 R⊕

Metric	Earth	Kepler-1271 b	Jupiter
Radius (R⊕)	1.00	1.48	11.21
Mass (M⊕)	1.00	2.79	317.83
Density (g/cm³)	5.51	4.73	1.33
Surface Gravity (g)	1.00	1.27	2.53
Insolation (S⊕)	1.00	975.18	0.037

Star Catalogue Identifiers

TIC

TIC 120825510

Gaia DR2

Gaia DR2 2099073667159859840

Gaia DR3

Gaia DR3 2099073667159859840

System

Kepler-1271

Percentile among Super-Earth cohort

Radius 1.480 R⊕ · percentile 32 / cohort 1176

Mass 2.790 M⊕ · percentile 30 / cohort 1176

Orbital period 3.03 d · percentile 22 / cohort 1164

Distance 831.99 pc · percentile 70 / cohort 1171

ESI 0.192 · percentile 11 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

3.026 days

Semi-major axis

0.0423 AU

Eccentricity

0.000

Inclination

79.13 °

Year Length

A year here lasts approximately 3.03 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0423 AU.

Transit Fingerprint

Depth

0.013 %

Duration

2.959 h

Impact parameter b

0.720

Rp / R★

0.010624

Transit midpoint (BJD)

2,454,967.3645

Photometric dip

Transit produces a flux drop of 128 ppm lasting ≈ 2.96 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010624

Semi-major axis / stellar radius

7.800

Impact parameter (b)

0.720

Transit mid-time (BJD)

2,454,967.3645

Angular separation (arcsec)

0.05090

Eq. Temperature

1,484K

(1211 °C)

Insolation (S⊕)

975.18

Earth = 1.00

Earth Similarity (ESI)

0.192

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1271

Spectral Class

F-type yellow-white

Effective Temperature

6,143 K — hotter than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.230 R☉

Stellar Mass

1.130 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.750 g/cm³

Metallicity ratio

[Fe/H]

Distance

831.99 parsec

Light-years 2,713.59 ly

V-band magnitude

14.08 mag

Voyager-speed travel 47,854,132 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.174 mas

Total Proper Motion

9.385 mas/yr

PM Right Ascension

0.85 mas/yr

PM Declination

-9.35 mas/yr

Galactic Cartesian (pc)

x = 0.224 · y = -0.762 · z = 0.608

Equatorial (J2000)

RA 286.34430° · Dec 37.41193°

Galactic ℓ, b

68.298° · 13.536°

Ecliptic λ, β

296.028° · 59.383°

HTM-20 index

919480225