Key parameters at a glance

A radius of 1.20 Earth radii
A mass of 1.87 Earth masses
Surface gravity around 1.30 g
An orbital period of 1.475 days
Semi-major axis 0.0309 AU
Equilibrium temperature 2,740 K (2467 °C)
Distance from Earth 3,034.74 light-years
Earth Similarity Index 0.094
Travel time at Voyager 1 speed 53,517,660 years

2 siblings around Kepler-770

Kepler-770 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-770 c this	Rocky Terrestrial	1.20	1.87	1.475	2,740	2016
Kepler-770 d	Super-Earth	1.40	2.54	4.152	1,941	2016
Kepler-770 b	Sub-Neptune	2.30	5.90	18.925	1,171	2016

Kepler-770 c Planet Profile

Physical Specs

Radius

1.20 R⊕

Radius (Jupiter)

0.107 R♃

Mass

1.87 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.95 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.094

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

#75of 570

top 13.0%

This planet

1.20R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-225 b 1.20 R⊕ Kepler-282 c 1.20 R⊕ Kepler-367 c 1.20 R⊕

Metric	Earth	Kepler-770 c	Jupiter
Radius (R⊕)	1.00	1.20	11.21
Mass (M⊕)	1.00	1.87	317.83
Density (g/cm³)	5.51	5.95	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	833.59	0.037

Star Catalogue Identifiers

TIC

TIC 120891972

Gaia DR2

Gaia DR2 2099980386293545216

Gaia DR3

Gaia DR3 2099980386293545216

System

Kepler-770

Percentile among Rocky Terrestrial cohort

Radius 1.200 R⊕ · percentile 84 / cohort 570

Mass 1.870 M⊕ · percentile 77 / cohort 570

Orbital period 1.48 d · percentile 16 / cohort 567

Distance 930.46 pc · percentile 92 / cohort 566

ESI 0.094 · percentile 1 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.475 days

Semi-major axis

0.0309 AU

Eccentricity

0.000

Inclination

88.41 °

Year Length

A year here lasts approximately 1.48 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0309 AU.

Transit Fingerprint

Depth

0.015 %

Duration

2.326 h

Impact parameter b

0.580

Rp / R★

0.011558

Transit midpoint (BJD)

2,454,964.8332

Photometric dip

Transit produces a flux drop of 155 ppm lasting ≈ 2.33 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011558

Semi-major axis / stellar radius

4.913

Impact parameter (b)

0.580

Transit mid-time (BJD)

2,454,964.8332

Angular separation (arcsec)

0.03320

Eq. Temperature

2,740K

(2467 °C)

Insolation (S⊕)

833.59

Earth = 1.00

Earth Similarity (ESI)

0.094

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-770

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,598 K — cooler than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.920 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

0.978 g/cm³

Metallicity ratio

[Fe/H]

Distance

930.46 parsec

Light-years 3,034.74 ly

V-band magnitude

14.85 mag

Voyager-speed travel 53,517,660 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.046 mas

Total Proper Motion

11.590 mas/yr

PM Right Ascension

5.86 mas/yr

PM Declination

-10.00 mas/yr

Galactic Cartesian (pc)

x = 0.223 · y = -0.752 · z = 0.621

Equatorial (J2000)

RA 286.49046° · Dec 38.37487°

Galactic ℓ, b

69.252° · 13.821°

Ecliptic λ, β

296.681° · 60.296°

HTM-20 index

803195646