Key parameters at a glance

A radius of 1.82 Earth radii
A mass of 3.97 Earth masses
Surface gravity around 1.20 g
An orbital period of 8.735 days
Semi-major axis 0.0843 AU
Equilibrium temperature 890 K (617 °C)
Distance from Earth 4,546.13 light-years
Earth Similarity Index 0.318
Travel time at Voyager 1 speed 80,170,917 years

Kepler-771 b Planet Profile

Physical Specs

Radius

1.82 R⊕

Radius (Jupiter)

0.162 R♃

Mass

3.97 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.62 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.318

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

#235of 1176

top 19.9%

This planet

1.82R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-283 c 1.82 R⊕ Kepler-1262 b 1.82 R⊕ Kepler-113 b 1.82 R⊕

Metric	Earth	Kepler-771 b	Jupiter
Radius (R⊕)	1.00	1.82	11.21
Mass (M⊕)	1.00	3.97	317.83
Density (g/cm³)	5.51	3.62	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	339.30	0.037

Star Catalogue Identifiers

TIC

TIC 121276933

Gaia DR2

Gaia DR2 2099527421862552832

Gaia DR3

Gaia DR3 2099527421862552832

System

Kepler-771

Percentile among Super-Earth cohort

Radius 1.820 R⊕ · percentile 79 / cohort 1176

Mass 3.970 M⊕ · percentile 72 / cohort 1176

Orbital period 8.73 d · percentile 60 / cohort 1164

Distance 1,393.85 pc · percentile 93 / cohort 1171

ESI 0.318 · percentile 41 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.735 days

Semi-major axis

0.0843 AU

Eccentricity

0.000

Inclination

88.75 °

Year Length

A year here lasts approximately 8.73 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0843 AU.

Transit Fingerprint

Depth

0.027 %

Duration

4.444 h

Impact parameter b

0.293

Rp / R★

0.015947

Transit midpoint (BJD)

2,454,968.0833

Photometric dip

Transit produces a flux drop of 271 ppm lasting ≈ 4.44 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015947

Semi-major axis / stellar radius

14.620

Impact parameter (b)

0.293

Transit mid-time (BJD)

2,454,968.0833

Angular separation (arcsec)

0.06050

Eq. Temperature

890K

(617 °C)

Insolation (S⊕)

339.30

Earth = 1.00

Earth Similarity (ESI)

0.318

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-771

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,906 K — hotter than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.050 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

0.775 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,393.85 parsec

Light-years 4,546.13 ly

V-band magnitude

14.96 mag

Voyager-speed travel 80,170,917 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

0.689 mas

Total Proper Motion

4.950 mas/yr

PM Right Ascension

4.17 mas/yr

PM Declination

-2.66 mas/yr

Galactic Cartesian (pc)

x = 0.236 · y = -0.751 · z = 0.617

Equatorial (J2000)

RA 287.44411° · Dec 38.08842°

Galactic ℓ, b

69.298° · 13.020°

Ecliptic λ, β

298.008° · 59.843°

HTM-20 index

685416081