Key parameters at a glance

A radius of 2.77 Earth radii
A mass of 8.10 Earth masses
Surface gravity around 1.06 g
An orbital period of 34.351 days
Semi-major axis 0.2101 AU
Equilibrium temperature 576 K (303 °C)
Distance from Earth 3,592.35 light-years
Earth Similarity Index 0.419
Travel time at Voyager 1 speed 63,351,043 years

Kepler-1077 b Planet Profile

Physical Specs

Radius

2.77 R⊕

Radius (Jupiter)

0.247 R♃

Mass

8.10 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.09 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.419

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

#780of 1978

top 39.4%

This planet

2.77R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-251 c 2.77 R⊕ Kepler-251 d 2.77 R⊕ TOI-444 b 2.77 R⊕

Metric	Earth	Kepler-1077 b	Jupiter
Radius (R⊕)	1.00	2.77	11.21
Mass (M⊕)	1.00	8.10	317.83
Density (g/cm³)	5.51	2.09	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	26.93	0.037

Star Catalogue Identifiers

TIC

TIC 159574927

Gaia DR2

Gaia DR2 2101930164010053120

Gaia DR3

Gaia DR3 2101930164010053120

System

Kepler-1077

Percentile among Sub-Neptune cohort

Radius 2.770 R⊕ · percentile 60 / cohort 1978

Mass 8.100 M⊕ · percentile 55 / cohort 1978

Orbital period 34.35 d · percentile 77 / cohort 1946

Distance 1,101.42 pc · percentile 84 / cohort 1975

ESI 0.419 · percentile 56 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

34.351 days

Semi-major axis

0.2101 AU

Eccentricity

0.000

Inclination

88.39 °

Year Length

A year here lasts approximately 34.35 Earth days (9.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2101 AU.

Transit Fingerprint

Depth

0.060 %

Duration

4.222 h

Impact parameter b

0.880

Rp / R★

0.025005

Transit midpoint (BJD)

2,454,967.1898

Photometric dip

Transit produces a flux drop of 599 ppm lasting ≈ 4.22 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025005

Semi-major axis / stellar radius

31.200

Impact parameter (b)

0.880

Transit mid-time (BJD)

2,454,967.1898

Angular separation (arcsec)

0.19100

Eq. Temperature

576K

(303 °C)

Insolation (S⊕)

26.93

Earth = 1.00

Earth Similarity (ESI)

0.419

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-1077

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,816 K — hotter than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

1.436 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,101.42 parsec

Light-years 3,592.35 ly

V-band magnitude

14.92 mag

Voyager-speed travel 63,351,043 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.879 mas

Total Proper Motion

4.322 mas/yr

PM Right Ascension

-0.72 mas/yr

PM Declination

-4.26 mas/yr

Galactic Cartesian (pc)

x = 0.266 · y = -0.691 · z = 0.673

Equatorial (J2000)

RA 291.03363° · Dec 42.26784°

Galactic ℓ, b

74.367° · 12.301°

Ecliptic λ, β

305.952° · 63.106°

HTM-20 index

382666091