Key parameters at a glance

A radius of 3.40 Earth radii
A mass of 11.50 Earth masses
Surface gravity around 0.99 g
An orbital period of 25.962 days
Semi-major axis 0.1840 AU
Equilibrium temperature 850 K (577 °C)
Distance from Earth 2,704.95 light-years
Earth Similarity Index 0.263
Travel time at Voyager 1 speed 47,701,825 years

Kepler-1051 b Planet Profile

Physical Specs

Radius

3.40 R⊕

Radius (Jupiter)

0.303 R♃

Mass

11.50 M⊕

Mass (Jupiter)

0.036 M♃

Density

1.61 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.263

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

#221of 1978

top 11.1%

This planet

3.40R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

GJ 3222 b 3.40 R⊕ K2-105 b 3.40 R⊕ Kepler-1360 b 3.40 R⊕

Metric	Earth	Kepler-1051 b	Jupiter
Radius (R⊕)	1.00	3.40	11.21
Mass (M⊕)	1.00	11.50	317.83
Density (g/cm³)	5.51	1.61	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	87.46	0.037

Star Catalogue Identifiers

TIC

TIC 138968338

Gaia DR2

Gaia DR2 2076661630160275072

Gaia DR3

Gaia DR3 2076661630160275072

System

Kepler-1051

Percentile among Sub-Neptune cohort

Radius 3.400 R⊕ · percentile 89 / cohort 1978

Mass 11.500 M⊕ · percentile 83 / cohort 1978

Orbital period 25.96 d · percentile 70 / cohort 1946

Distance 829.34 pc · percentile 67 / cohort 1975

ESI 0.263 · percentile 19 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

25.962 days

Semi-major axis

0.1840 AU

Eccentricity

0.000

Inclination

89.96 °

Year Length

A year here lasts approximately 25.96 Earth days (7.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1840 AU.

Transit Fingerprint

Depth

0.037 %

Duration

6.270 h

Impact parameter b

0.772

Rp / R★

0.017781

Transit midpoint (BJD)

2,454,971.9662

Photometric dip

Transit produces a flux drop of 368 ppm lasting ≈ 6.27 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017781

Semi-major axis / stellar radius

32.160

Impact parameter (b)

0.772

Transit mid-time (BJD)

2,454,971.9662

Angular separation (arcsec)

0.22200

Eq. Temperature

850K

(577 °C)

Insolation (S⊕)

87.46

Earth = 1.00

Earth Similarity (ESI)

0.263

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-1051

Spectral Class

F-type yellow-white

Effective Temperature

6,675 K — hotter than the Sun (5,778 K)

Estimated Age

1.74 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.730 R☉

Stellar Mass

1.430 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.120 dex

Stellar density

0.460 g/cm³

Metallicity ratio

[Fe/H]

Distance

829.34 parsec

Light-years 2,704.95 ly

V-band magnitude

13.21 mag

Voyager-speed travel 47,701,825 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.177 mas

Total Proper Motion

6.300 mas/yr

PM Right Ascension

1.48 mas/yr

PM Declination

-6.12 mas/yr

Galactic Cartesian (pc)

x = 0.321 · y = -0.684 · z = 0.655

Equatorial (J2000)

RA 295.15811° · Dec 40.89882°

Galactic ℓ, b

74.550° · 8.931°

Ecliptic λ, β

311.179° · 60.791°

HTM-20 index

1497053752