Key parameters at a glance

A radius of 3.17 Earth radii
A mass of 10.20 Earth masses
Surface gravity around 1.02 g
An orbital period of 11.090 days
Semi-major axis 0.1082 AU
Equilibrium temperature 1,422 K (1149 °C)
Distance from Earth 2,993.47 light-years
Earth Similarity Index 0.153
Travel time at Voyager 1 speed 52,789,890 years

Kepler-774 b Planet Profile

Physical Specs

Radius

3.17 R⊕

Radius (Jupiter)

0.283 R♃

Mass

10.20 M⊕

Mass (Jupiter)

0.032 M♃

Density

1.76 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.153

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

#378of 1978

top 19.1%

This planet

3.17R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-253 d 3.17 R⊕ KMT-2021-BLG-2609L b 3.17 R⊕ GJ 160.2 b 3.17 R⊕

Metric	Earth	Kepler-774 b	Jupiter
Radius (R⊕)	1.00	3.17	11.21
Mass (M⊕)	1.00	10.20	317.83
Density (g/cm³)	5.51	1.76	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	451.18	0.037

Star Catalogue Identifiers

TIC

TIC 122780849

Gaia DR2

Gaia DR2 2052629162133190784

Gaia DR3

Gaia DR3 2052629162133190784

System

Kepler-774

Percentile among Sub-Neptune cohort

Radius 3.170 R⊕ · percentile 81 / cohort 1978

Mass 10.200 M⊕ · percentile 74 / cohort 1978

Orbital period 11.09 d · percentile 38 / cohort 1946

Distance 917.80 pc · percentile 73 / cohort 1975

ESI 0.153 · percentile 2 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.090 days

Semi-major axis

0.1082 AU

Eccentricity

0.000

Inclination

89.92 °

Year Length

A year here lasts approximately 11.09 Earth days (3.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1082 AU.

Transit Fingerprint

Depth

0.015 %

Duration

6.341 h

Impact parameter b

0.768

Rp / R★

0.011532

Transit midpoint (BJD)

2,454,974.7621

Photometric dip

Transit produces a flux drop of 148 ppm lasting ≈ 6.34 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011532

Semi-major axis / stellar radius

8.840

Impact parameter (b)

0.768

Transit mid-time (BJD)

2,454,974.7621

Angular separation (arcsec)

0.11800

Eq. Temperature

1,422K

(1149 °C)

Insolation (S⊕)

451.18

Earth = 1.00

Earth Similarity (ESI)

0.153

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-774

Spectral Class

F-type yellow-white

Effective Temperature

6,403 K — hotter than the Sun (5,778 K)

Estimated Age

2.14 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.420 R☉

Stellar Mass

1.570 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

3.870 dex

Stellar density

0.230 g/cm³

Metallicity ratio

[Fe/H]

Distance

917.80 parsec

Light-years 2,993.47 ly

V-band magnitude

12.89 mag

Voyager-speed travel 52,789,890 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.061 mas

Total Proper Motion

13.063 mas/yr

PM Right Ascension

-6.66 mas/yr

PM Declination

-11.24 mas/yr

Galactic Cartesian (pc)

x = 0.282 · y = -0.733 · z = 0.619

Equatorial (J2000)

RA 291.03186° · Dec 38.21189°

Galactic ℓ, b

70.648° · 10.524°

Ecliptic λ, β

303.448° · 59.233°

HTM-20 index

2117073229