Key parameters at a glance

A radius of 1.67 Earth radii
A mass of 3.43 Earth masses
Surface gravity around 1.23 g
An orbital period of 15.054 days
Semi-major axis 0.1078 AU
Equilibrium temperature 665 K (392 °C)
Distance from Earth 2,116.68 light-years
Earth Similarity Index 0.439
Travel time at Voyager 1 speed 37,327,719 years

Kepler-1252 b Planet Profile

Physical Specs

Radius

1.67 R⊕

Radius (Jupiter)

0.149 R♃

Mass

3.43 M⊕

Mass (Jupiter)

0.011 M♃

Density

4.05 g/cm³

Surface Gravity

1.23 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.439

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

#452of 1176

top 38.4%

This planet

1.67R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

HD 3167 b 1.67 R⊕ Kepler-24 d 1.67 R⊕ Kepler-288 b 1.67 R⊕

Metric	Earth	Kepler-1252 b	Jupiter
Radius (R⊕)	1.00	1.67	11.21
Mass (M⊕)	1.00	3.43	317.83
Density (g/cm³)	5.51	4.05	1.33
Surface Gravity (g)	1.00	1.23	2.53
Insolation (S⊕)	1.00	57.58	0.037

Star Catalogue Identifiers

TIC

TIC 268387099

Gaia DR2

Gaia DR2 2085514146171216768

Gaia DR3

Gaia DR3 2085514146171216768

System

Kepler-1252

Percentile among Super-Earth cohort

Radius 1.670 R⊕ · percentile 61 / cohort 1176

Mass 3.430 M⊕ · percentile 55 / cohort 1176

Orbital period 15.05 d · percentile 78 / cohort 1164

Distance 648.98 pc · percentile 58 / cohort 1171

ESI 0.439 · percentile 66 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

15.054 days

Semi-major axis

0.1078 AU

Eccentricity

0.000

Inclination

86.09 °

Year Length

A year here lasts approximately 15.05 Earth days (4.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1078 AU.

Transit Fingerprint

Depth

0.022 %

Duration

4.275 h

Impact parameter b

0.268

Rp / R★

0.014213

Transit midpoint (BJD)

2,454,968.5307

Photometric dip

Transit produces a flux drop of 222 ppm lasting ≈ 4.28 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014213

Semi-major axis / stellar radius

26.320

Impact parameter (b)

0.268

Transit mid-time (BJD)

2,454,968.5307

Angular separation (arcsec)

0.16600

Eq. Temperature

665K

(392 °C)

Insolation (S⊕)

57.58

Earth = 1.00

Earth Similarity (ESI)

0.439

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-1252

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,949 K — hotter than the Sun (5,778 K)

Estimated Age

3.89 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.522 g/cm³

Metallicity ratio

[Fe/H]

Distance

648.98 parsec

Light-years 2,116.68 ly

V-band magnitude

14.74 mag

Voyager-speed travel 37,327,719 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.512 mas

Total Proper Motion

12.516 mas/yr

PM Right Ascension

6.53 mas/yr

PM Declination

10.68 mas/yr

Galactic Cartesian (pc)

x = 0.332 · y = -0.600 · z = 0.728

Equatorial (J2000)

RA 298.95036° · Dec 46.69284°

Galactic ℓ, b

81.025° · 9.359°

Ecliptic λ, β

321.802° · 65.010°

HTM-20 index

248198164