Key parameters at a glance

A radius of 1.52 Earth radii
A mass of 2.92 Earth masses
Surface gravity around 1.26 g
An orbital period of 7.427 days
Semi-major axis 0.0734 AU
Equilibrium temperature 899 K (626 °C)
Distance from Earth 3,137.32 light-years
Earth Similarity Index 0.333
Travel time at Voyager 1 speed 55,326,589 years

Kepler-1220 b Planet Profile

Physical Specs

Radius

1.52 R⊕

Radius (Jupiter)

0.136 R♃

Mass

2.92 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.57 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.333

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

#707of 1176

top 60.0%

This planet

1.52R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-65 d 1.52 R⊕ Kepler-348 b 1.52 R⊕ Kepler-306 b 1.52 R⊕

Metric	Earth	Kepler-1220 b	Jupiter
Radius (R⊕)	1.00	1.52	11.21
Mass (M⊕)	1.00	2.92	317.83
Density (g/cm³)	5.51	4.57	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	177.84	0.037

Star Catalogue Identifiers

TIC

TIC 272944301

Gaia DR2

Gaia DR2 2078707035323917568

Gaia DR3

Gaia DR3 2078707035323917568

System

Kepler-1220

Percentile among Super-Earth cohort

Radius 1.520 R⊕ · percentile 39 / cohort 1176

Mass 2.920 M⊕ · percentile 36 / cohort 1176

Orbital period 7.43 d · percentile 55 / cohort 1164

Distance 961.91 pc · percentile 79 / cohort 1171

ESI 0.333 · percentile 46 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.427 days

Semi-major axis

0.0734 AU

Eccentricity

0.000

Inclination

88.86 °

Year Length

A year here lasts approximately 7.43 Earth days (2.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0734 AU.

Transit Fingerprint

Depth

0.023 %

Duration

2.848 h

Impact parameter b

0.030

Rp / R★

0.013767

Transit midpoint (BJD)

2,454,966.0987

Photometric dip

Transit produces a flux drop of 227 ppm lasting ≈ 2.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013767

Semi-major axis / stellar radius

20.190

Impact parameter (b)

0.030

Transit mid-time (BJD)

2,454,966.0987

Angular separation (arcsec)

0.07630

Eq. Temperature

899K

(626 °C)

Insolation (S⊕)

177.84

Earth = 1.00

Earth Similarity (ESI)

0.333

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-1220

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,842 K — hotter than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.990 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.662 g/cm³

Metallicity ratio

[Fe/H]

Distance

961.91 parsec

Light-years 3,137.32 ly

V-band magnitude

15.19 mag

Voyager-speed travel 55,326,589 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.012 mas

Total Proper Motion

5.561 mas/yr

PM Right Ascension

4.54 mas/yr

PM Declination

-3.22 mas/yr

Galactic Cartesian (pc)

x = 0.333 · y = -0.651 · z = 0.682

Equatorial (J2000)

RA 297.07040° · Dec 42.97774°

Galactic ℓ, b

77.087° · 8.685°

Ecliptic λ, β

315.553° · 62.202°

HTM-20 index

1554035962