Key parameters at a glance

A radius of 5.06 Earth radii
A mass of 22.50 Earth masses
Surface gravity around 0.88 g
An orbital period of 62.950 days
Distance from Earth 712.85 light-years
Earth Similarity Index 0.473
Travel time at Voyager 1 speed 12,571,163 years

Context from the literature

Kepler-19 is a G7V star that is host to three known planets - Kepler-19b, Kepler-19c, and Kepler-19d. It is located about 720 light-years away in the constellation Lyra, five arcminutes northwest of the much more distant open cluster NGC 6791.

Excerpted from Wikipedia · full article

2 siblings around Kepler-19

Kepler-19 d 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-19 b	Sub-Neptune	2.21	6.10	9.287	851	2011
Kepler-19 c	Sub-Neptune	3.68	13.10	28.731	—	2011
Kepler-19 d this	Neptune-like	5.06	22.50	62.950	—	2017

Kepler-19 d Planet Profile

Physical Specs

Radius

5.06 R⊕

Radius (Jupiter)

0.451 R♃

Mass

22.50 M⊕

Mass (Jupiter)

0.071 M♃

Density

0.95 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.473

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Radial Velocity

Facility Roque de los Muchachos Observatory

Telescope 3.58 m Telescopio Nazionale Galileo

Size rank in cohort

Rank by radius

#376of 574

top 65.3%

This planet

5.06R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

K2-98 b 5.07 R⊕ TOI-6223 b 5.07 R⊕ TOI-1728 b 5.05 R⊕

Metric	Earth	Kepler-19 d	Jupiter
Radius (R⊕)	1.00	5.06	11.21
Mass (M⊕)	1.00	22.50	317.83
Density (g/cm³)	5.51	0.95	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	22.500 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 122375047

Gaia DR2

Gaia DR2 2051106987063242880

Gaia DR3

Gaia DR3 2051106987063242880

System

Kepler-19

Percentile among Neptune-like cohort

Radius 5.060 R⊕ · percentile 34 / cohort 574

Mass 22.500 M⊕ · percentile 36 / cohort 574

Orbital period 62.95 d · percentile 74 / cohort 524

Distance 218.56 pc · percentile 41 / cohort 572

ESI 0.473 · percentile 86 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

62.950 days

Semi-major axis

— AU

Eccentricity

0.050

Inclination

— °

Year Length

A year here lasts approximately 62.95 Earth days (17.2% of a terrestrial year) on a nearly circular orbit.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.473

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Malavolta et al. 2017

Instrument

HARPS-N Spectrograph

Publication

2017-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at Roque de los Muchachos Observatory (2 shown).

GJ 3942 b · Sub-Neptune TYC 4282-00605-1 b · Gas Giant

Host System: Kepler-19

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,544 K — cooler than the Sun (5,778 K)

Estimated Age

1.90 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.859 R☉

Stellar Mass

0.936 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.510 dex

Stellar density

1.330 g/cm³

Systemic radial velocity

-11.01 km/s

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

218.56 parsec

Light-years 712.85 ly

V-band magnitude

12.04 mag

Voyager-speed travel 12,571,163 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

4.547 mas

Total Proper Motion

39.780 mas/yr

PM Right Ascension

25.28 mas/yr

PM Declination

-30.71 mas/yr

Galactic Cartesian (pc)

x = 0.276 · y = -0.740 · z = 0.614

Equatorial (J2000)

RA 290.42097° · Dec 37.85166°

Galactic ℓ, b

70.102° · 10.797°

Ecliptic λ, β

302.354° · 59.018°

HTM-20 index

1817129943

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