Key parameters at a glance

A radius of 1.22 Earth radii
A mass of 1.98 Earth masses
Surface gravity around 1.33 g
An orbital period of 4.767 days
Semi-major axis 0.0528 AU
Equilibrium temperature 1,046 K (773 °C)
Distance from Earth 2,155.96 light-years
Earth Similarity Index 0.295
Travel time at Voyager 1 speed 38,020,404 years

Kepler-1215 b Planet Profile

Physical Specs

Radius

1.22 R⊕

Radius (Jupiter)

0.109 R♃

Mass

1.98 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.99 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.295

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

#35of 570

top 6.0%

This planet

1.22R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-295 b 1.22 R⊕ Kepler-226 d 1.22 R⊕ Kepler-197 d 1.22 R⊕

Metric	Earth	Kepler-1215 b	Jupiter
Radius (R⊕)	1.00	1.22	11.21
Mass (M⊕)	1.00	1.98	317.83
Density (g/cm³)	5.51	5.99	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	253.96	0.037

Star Catalogue Identifiers

TIC

TIC 28230011

Gaia DR2

Gaia DR2 2086526693301504896

Gaia DR3

Gaia DR3 2086526693301504896

System

Kepler-1215

Percentile among Rocky Terrestrial cohort

Radius 1.220 R⊕ · percentile 92 / cohort 570

Mass 1.980 M⊕ · percentile 83 / cohort 570

Orbital period 4.77 d · percentile 52 / cohort 567

Distance 661.02 pc · percentile 77 / cohort 566

ESI 0.295 · percentile 37 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.767 days

Semi-major axis

0.0528 AU

Eccentricity

0.000

Inclination

89.76 °

Year Length

A year here lasts approximately 4.77 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0528 AU.

Transit Fingerprint

Depth

0.016 %

Duration

1.850 h

Impact parameter b

0.941

Rp / R★

0.011971

Transit midpoint (BJD)

2,454,965.6904

Photometric dip

Transit produces a flux drop of 163 ppm lasting ≈ 1.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011971

Semi-major axis / stellar radius

6.200

Impact parameter (b)

0.941

Transit mid-time (BJD)

2,454,965.6904

Angular separation (arcsec)

0.07990

Eq. Temperature

1,046K

(773 °C)

Insolation (S⊕)

253.96

Earth = 1.00

Earth Similarity (ESI)

0.295

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-1215

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,616 K — cooler than the Sun (5,778 K)

Estimated Age

4.79 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

5.065 g/cm³

Metallicity ratio

[Fe/H]

Distance

661.02 parsec

Light-years 2,155.96 ly

V-band magnitude

14.54 mag

Voyager-speed travel 38,020,404 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.484 mas

Total Proper Motion

5.530 mas/yr

PM Right Ascension

2.68 mas/yr

PM Declination

-4.84 mas/yr

Galactic Cartesian (pc)

x = 0.308 · y = -0.592 · z = 0.745

Equatorial (J2000)

RA 297.46365° · Dec 48.18140°

Galactic ℓ, b

81.843° · 10.965°

Ecliptic λ, β

321.296° · 66.795°

HTM-20 index

2057127217