Key parameters at a glance

A radius of 1.45 Earth radii
A mass of 2.70 Earth masses
Surface gravity around 1.28 g
An orbital period of 17.292 days
Semi-major axis 0.1395 AU
Equilibrium temperature 809 K (536 °C)
Distance from Earth 3,671.60 light-years
Earth Similarity Index 0.378
Travel time at Voyager 1 speed 64,748,721 years

Kepler-1226 b Planet Profile

Physical Specs

Radius

1.45 R⊕

Radius (Jupiter)

0.129 R♃

Mass

2.70 M⊕

Mass (Jupiter)

0.008 M♃

Density

4.87 g/cm³

Surface Gravity

1.28 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.378

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

#837of 1176

top 71.1%

This planet

1.45R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-176 e 1.45 R⊕ Kepler-361 b 1.45 R⊕ Kepler-375 b 1.45 R⊕

Metric	Earth	Kepler-1226 b	Jupiter
Radius (R⊕)	1.00	1.45	11.21
Mass (M⊕)	1.00	2.70	317.83
Density (g/cm³)	5.51	4.87	1.33
Surface Gravity (g)	1.00	1.28	2.53
Insolation (S⊕)	1.00	140.38	0.037

Star Catalogue Identifiers

TIC

TIC 27845000

Gaia DR2

Gaia DR2 2135377135926967424

Gaia DR3

Gaia DR3 2135377135926967424

System

Kepler-1226

Percentile among Super-Earth cohort

Radius 1.450 R⊕ · percentile 28 / cohort 1176

Mass 2.700 M⊕ · percentile 26 / cohort 1176

Orbital period 17.29 d · percentile 81 / cohort 1164

Distance 1,125.72 pc · percentile 87 / cohort 1171

ESI 0.378 · percentile 56 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

17.292 days

Semi-major axis

0.1395 AU

Eccentricity

0.000

Inclination

85.04 °

Year Length

A year here lasts approximately 17.29 Earth days (4.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1394 AU.

Transit Fingerprint

Depth

0.020 %

Duration

6.724 h

Impact parameter b

0.748

Rp / R★

0.012966

Transit midpoint (BJD)

2,454,968.7499

Photometric dip

Transit produces a flux drop of 203 ppm lasting ≈ 6.72 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012966

Semi-major axis / stellar radius

13.100

Impact parameter (b)

0.748

Transit mid-time (BJD)

2,454,968.7499

Angular separation (arcsec)

0.12400

Eq. Temperature

809K

(536 °C)

Insolation (S⊕)

140.38

Earth = 1.00

Earth Similarity (ESI)

0.378

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

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-1226

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,923 K — hotter than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

0.400 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,125.72 parsec

Light-years 3,671.60 ly

V-band magnitude

14.32 mag

Voyager-speed travel 64,748,721 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.860 mas

Total Proper Motion

4.409 mas/yr

PM Right Ascension

-3.11 mas/yr

PM Declination

-3.13 mas/yr

Galactic Cartesian (pc)

x = 0.282 · y = -0.568 · z = 0.773

Equatorial (J2000)

RA 296.37685° · Dec 50.62146°

Galactic ℓ, b

83.702° · 12.737°

Ecliptic λ, β

322.787° · 69.273°

HTM-20 index

-20430895