Key parameters at a glance

A radius of 2.54 Earth radii
A mass of 6.99 Earth masses
Surface gravity around 1.08 g
An orbital period of 44.931 days
Semi-major axis 0.2797 AU
Equilibrium temperature 565 K (292 °C)
Distance from Earth 5,280.56 light-years
Earth Similarity Index 0.442
Travel time at Voyager 1 speed 93,122,732 years

Kepler-852 b Planet Profile

Physical Specs

Radius

2.54 R⊕

Radius (Jupiter)

0.227 R♃

Mass

6.99 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.34 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.442

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

#1117of 1978

top 56.4%

This planet

2.54R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1116 b 2.54 R⊕ Kepler-325 c 2.54 R⊕ HD 189567 c 2.54 R⊕

Metric	Earth	Kepler-852 b	Jupiter
Radius (R⊕)	1.00	2.54	11.21
Mass (M⊕)	1.00	6.99	317.83
Density (g/cm³)	5.51	2.34	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	92.13	0.037

Star Catalogue Identifiers

TIC

TIC 28089606

Gaia DR2

Gaia DR2 2086727319810829440

Gaia DR3

Gaia DR3 2086727319810829440

System

Kepler-852

Percentile among Sub-Neptune cohort

Radius 2.540 R⊕ · percentile 43 / cohort 1978

Mass 6.990 M⊕ · percentile 40 / cohort 1978

Orbital period 44.93 d · percentile 83 / cohort 1946

Distance 1,619.03 pc · percentile 94 / cohort 1975

ESI 0.442 · percentile 61 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

44.931 days

Semi-major axis

0.2797 AU

Eccentricity

0.000

Inclination

89.42 °

Year Length

A year here lasts approximately 44.93 Earth days (12.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2797 AU.

Transit Fingerprint

Depth

0.044 %

Duration

6.498 h

Impact parameter b

0.895

Rp / R★

0.020399

Transit midpoint (BJD)

2,454,973.2043

Photometric dip

Transit produces a flux drop of 440 ppm lasting ≈ 6.50 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020399

Semi-major axis / stellar radius

24.100

Impact parameter (b)

0.895

Transit mid-time (BJD)

2,454,973.2043

Angular separation (arcsec)

0.17300

Eq. Temperature

565K

(292 °C)

Insolation (S⊕)

92.13

Earth = 1.00

Earth Similarity (ESI)

0.442

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

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-852

Spectral Class

F-type yellow-white

Effective Temperature

6,100 K — hotter than the Sun (5,778 K)

Estimated Age

1.48 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.160 R☉

Stellar Mass

1.190 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

0.160 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,619.03 parsec

Light-years 5,280.56 ly

V-band magnitude

14.01 mag

Voyager-speed travel 93,122,732 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.589 mas

Total Proper Motion

1.970 mas/yr

PM Right Ascension

0.51 mas/yr

PM Declination

-1.90 mas/yr

Galactic Cartesian (pc)

x = 0.304 · y = -0.588 · z = 0.750

Equatorial (J2000)

RA 297.39159° · Dec 48.56069°

Galactic ℓ, b

82.159° · 11.188°

Ecliptic λ, β

321.642° · 67.152°

HTM-20 index

2108636996