Key parameters at a glance

A radius of 2.38 Earth radii
A mass of 6.26 Earth masses
Surface gravity around 1.11 g
An orbital period of 24.335 days
Semi-major axis 0.1670 AU
Equilibrium temperature 647 K (374 °C)
Distance from Earth 6,211.77 light-years
Earth Similarity Index 0.398
Travel time at Voyager 1 speed 109,544,584 years

Kepler-1249 b Planet Profile

Physical Specs

Radius

2.38 R⊕

Radius (Jupiter)

0.212 R♃

Mass

6.26 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.55 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.398

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

#1365of 1978

top 69.0%

This planet

2.38R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-166 c 2.38 R⊕ Kepler-159 b 2.38 R⊕ Kepler-189 c 2.38 R⊕

Metric	Earth	Kepler-1249 b	Jupiter
Radius (R⊕)	1.00	2.38	11.21
Mass (M⊕)	1.00	6.26	317.83
Density (g/cm³)	5.51	2.55	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	98.34	0.037

Star Catalogue Identifiers

TIC

TIC 272719153

Gaia DR2

Gaia DR2 2078933569080413056

Gaia DR3

Gaia DR3 2078933569080413056

System

Kepler-1249

Percentile among Sub-Neptune cohort

Radius 2.380 R⊕ · percentile 31 / cohort 1978

Mass 6.260 M⊕ · percentile 29 / cohort 1978

Orbital period 24.33 d · percentile 68 / cohort 1946

Distance 1,904.54 pc · percentile 97 / cohort 1975

ESI 0.398 · percentile 52 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

24.335 days

Semi-major axis

0.1670 AU

Eccentricity

0.000

Inclination

89.97 °

Year Length

A year here lasts approximately 24.33 Earth days (6.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1670 AU.

Transit Fingerprint

Depth

0.032 %

Duration

6.630 h

Impact parameter b

0.891

Rp / R★

0.017210

Transit midpoint (BJD)

2,454,980.4084

Photometric dip

Transit produces a flux drop of 323 ppm lasting ≈ 6.63 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017210

Semi-major axis / stellar radius

28.820

Impact parameter (b)

0.891

Transit mid-time (BJD)

2,454,980.4084

Angular separation (arcsec)

0.08770

Eq. Temperature

647K

(374 °C)

Insolation (S⊕)

98.34

Earth = 1.00

Earth Similarity (ESI)

0.398

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-1249

Spectral Class

F-type yellow-white

Effective Temperature

6,202 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.280 R☉

Stellar Mass

1.190 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.675 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,904.54 parsec

Light-years 6,211.77 ly

V-band magnitude

15.39 mag

Voyager-speed travel 109,544,584 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.498 mas

Total Proper Motion

9.775 mas/yr

PM Right Ascension

-1.74 mas/yr

PM Declination

-9.62 mas/yr

Galactic Cartesian (pc)

x = 0.323 · y = -0.638 · z = 0.699

Equatorial (J2000)

RA 296.89485° · Dec 44.37174°

Galactic ℓ, b

78.258° · 9.473°

Ecliptic λ, β

316.508° · 63.533°

HTM-20 index

1150756026