Key parameters at a glance

A radius of 0.89 Earth radii
A mass of 0.64 Earth masses
Surface gravity around 0.81 g
An orbital period of 0.677 days
Semi-major axis 0.0150 AU
Equilibrium temperature 2,099 K (1826 °C)
Distance from Earth 1,818.82 light-years
Earth Similarity Index 0.133
Travel time at Voyager 1 speed 32,074,809 years

Kepler-780 b Planet Profile

Physical Specs

Radius

0.89 R⊕

Radius (Jupiter)

0.079 R♃

Mass

0.64 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.99 g/cm³

Surface Gravity

0.81 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.133

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

#418of 570

top 73.2%

This planet

0.89R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-353 b 0.89 R⊕ Kepler-387 c 0.89 R⊕ Kepler-303 b 0.89 R⊕

Metric	Earth	Kepler-780 b	Jupiter
Radius (R⊕)	1.00	0.89	11.21
Mass (M⊕)	1.00	0.64	317.83
Density (g/cm³)	5.51	4.99	1.33
Surface Gravity (g)	1.00	0.81	2.53
Insolation (S⊕)	1.00	4,572.56	0.037

Star Catalogue Identifiers

TIC

TIC 123362050

Gaia DR2

Gaia DR2 2117396336940399616

Gaia DR3

Gaia DR3 2117396341239154560

System

Kepler-780

Percentile among Rocky Terrestrial cohort

Radius 0.890 R⊕ · percentile 25 / cohort 570

Mass 0.640 M⊕ · percentile 21 / cohort 570

Orbital period 0.68 d · percentile 5 / cohort 567

Distance 557.65 pc · percentile 69 / cohort 566

ESI 0.133 · percentile 3 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.677 days

Semi-major axis

0.0150 AU

Eccentricity

0.000

Inclination

87.38 °

Year Length

A year here lasts roughly 16.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0150 AU.

Transit Fingerprint

Depth

0.008 %

Duration

1.824 h

Impact parameter b

0.864

Rp / R★

0.008089

Transit midpoint (BJD)

2,454,966.9458

Photometric dip

Transit produces a flux drop of 77 ppm lasting ≈ 1.82 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008089

Semi-major axis / stellar radius

2.879

Impact parameter (b)

0.864

Transit mid-time (BJD)

2,454,966.9458

Angular separation (arcsec)

0.02690

Eq. Temperature

2,099K

(1826 °C)

Insolation (S⊕)

4,572.56

Earth = 1.00

Earth Similarity (ESI)

0.133

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-780

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,769 K — cooler than the Sun (5,778 K)

Estimated Age

4.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

1.014 g/cm³

Metallicity ratio

[Fe/H]

Distance

557.65 parsec

Light-years 1,818.82 ly

V-band magnitude

13.46 mag

Voyager-speed travel 32,074,809 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.681 mas

Total Proper Motion

11.735 mas/yr

PM Right Ascension

-9.04 mas/yr

PM Declination

-7.49 mas/yr

Galactic Cartesian (pc)

x = 0.146 · y = -0.701 · z = 0.698

Equatorial (J2000)

RA 281.76635° · Dec 44.29249°

Galactic ℓ, b

73.619° · 19.304°

Ecliptic λ, β

291.785° · 66.844°

HTM-20 index

-42315021