Key parameters at a glance

A radius of 1.68 Earth radii
A mass of 3.46 Earth masses
Surface gravity around 1.23 g
An orbital period of 8.507 days
Semi-major axis 0.0802 AU
Equilibrium temperature 900 K (627 °C)
Distance from Earth 2,737.28 light-years
Earth Similarity Index 0.322
Travel time at Voyager 1 speed 48,271,940 years

Kepler-851 b Planet Profile

Physical Specs

Radius

1.68 R⊕

Radius (Jupiter)

0.150 R♃

Mass

3.46 M⊕

Mass (Jupiter)

0.011 M♃

Density

4.01 g/cm³

Surface Gravity

1.23 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.322

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

#435of 1176

top 36.9%

This planet

1.68R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-795 b 1.68 R⊕ Kepler-1449 b 1.68 R⊕ Kepler-188 b 1.68 R⊕

Metric	Earth	Kepler-851 b	Jupiter
Radius (R⊕)	1.00	1.68	11.21
Mass (M⊕)	1.00	3.46	317.83
Density (g/cm³)	5.51	4.01	1.33
Surface Gravity (g)	1.00	1.23	2.53
Insolation (S⊕)	1.00	103.83	0.037

Star Catalogue Identifiers

TIC

TIC 27235573

Gaia DR2

Gaia DR2 2134808963293894912

Gaia DR3

Gaia DR3 2134808963293894912

System

Kepler-851

Percentile among Super-Earth cohort

Radius 1.680 R⊕ · percentile 62 / cohort 1176

Mass 3.460 M⊕ · percentile 56 / cohort 1176

Orbital period 8.51 d · percentile 60 / cohort 1164

Distance 839.26 pc · percentile 70 / cohort 1171

ESI 0.322 · percentile 42 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.507 days

Semi-major axis

0.0802 AU

Eccentricity

0.000

Inclination

86.53 °

Year Length

A year here lasts approximately 8.51 Earth days (2.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0802 AU.

Transit Fingerprint

Depth

0.030 %

Duration

3.026 h

Impact parameter b

0.803

Rp / R★

0.017874

Transit midpoint (BJD)

2,454,967.6431

Photometric dip

Transit produces a flux drop of 296 ppm lasting ≈ 3.03 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017874

Semi-major axis / stellar radius

13.460

Impact parameter (b)

0.803

Transit mid-time (BJD)

2,454,967.6431

Angular separation (arcsec)

0.09560

Eq. Temperature

900K

(627 °C)

Insolation (S⊕)

103.83

Earth = 1.00

Earth Similarity (ESI)

0.322

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-851

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,455 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.890 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

0.638 g/cm³

Metallicity ratio

[Fe/H]

Distance

839.26 parsec

Light-years 2,737.28 ly

V-band magnitude

15.17 mag

Voyager-speed travel 48,271,940 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.163 mas

Total Proper Motion

13.442 mas/yr

PM Right Ascension

-8.61 mas/yr

PM Declination

-10.32 mas/yr

Galactic Cartesian (pc)

x = 0.273 · y = -0.594 · z = 0.756

Equatorial (J2000)

RA 294.68022° · Dec 49.14011°

Galactic ℓ, b

81.839° · 13.038°

Ecliptic λ, β

318.160° · 68.491°

HTM-20 index

1621466850