Key parameters at a glance

A radius of 2.76 Earth radii
A mass of 8.05 Earth masses
Surface gravity around 1.06 g
An orbital period of 33.200 days
Semi-major axis 0.1894 AU
Equilibrium temperature 485 K (212 °C)
Distance from Earth 2,166.67 light-years
Earth Similarity Index 0.490
Travel time at Voyager 1 speed 38,209,292 years

Kepler-819 b Planet Profile

Physical Specs

Radius

2.76 R⊕

Radius (Jupiter)

0.246 R♃

Mass

8.05 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.10 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.490

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

#794of 1978

top 40.1%

This planet

2.76R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-172 e 2.76 R⊕ TOI-1260 c 2.76 R⊕ Kepler-1458 b 2.76 R⊕

Metric	Earth	Kepler-819 b	Jupiter
Radius (R⊕)	1.00	2.76	11.21
Mass (M⊕)	1.00	8.05	317.83
Density (g/cm³)	5.51	2.10	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	9.91	0.037

Star Catalogue Identifiers

TIC

TIC 139106013

Gaia DR2

Gaia DR2 2076186611079704320

Gaia DR3

Gaia DR3 2076186611079704320

System

Kepler-819

Percentile among Sub-Neptune cohort

Radius 2.760 R⊕ · percentile 60 / cohort 1978

Mass 8.050 M⊕ · percentile 55 / cohort 1978

Orbital period 33.20 d · percentile 76 / cohort 1946

Distance 664.31 pc · percentile 57 / cohort 1975

ESI 0.490 · percentile 69 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

33.200 days

Semi-major axis

0.1894 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 33.20 Earth days (9.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1894 AU.

Transit Fingerprint

Depth

0.118 %

Duration

5.014 h

Impact parameter b

0.876

Rp / R★

0.030827

Transit midpoint (BJD)

2,454,986.6631

Photometric dip

Transit produces a flux drop of 1,179 ppm lasting ≈ 5.01 h.

Extended Orbital Architecture

Planet / star radius ratio

0.030827

Semi-major axis / stellar radius

52.040

Impact parameter (b)

0.876

Transit mid-time (BJD)

2,454,986.6631

Angular separation (arcsec)

0.28500

Eq. Temperature

485K

(212 °C)

Insolation (S⊕)

9.91

Earth = 1.00

Earth Similarity (ESI)

0.490

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-819

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,279 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.810 R☉

Stellar Mass

0.860 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.550 dex

Stellar density

2.419 g/cm³

Metallicity ratio

[Fe/H]

Distance

664.31 parsec

Light-years 2,166.67 ly

V-band magnitude

15.40 mag

Voyager-speed travel 38,209,292 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.477 mas

Total Proper Motion

19.029 mas/yr

PM Right Ascension

7.06 mas/yr

PM Declination

17.67 mas/yr

Galactic Cartesian (pc)

x = 0.332 · y = -0.700 · z = 0.632

Equatorial (J2000)

RA 295.37083° · Dec 39.17729°

Galactic ℓ, b

73.099° · 7.967°

Ecliptic λ, β

310.319° · 59.116°

HTM-20 index

-1965960148