Key parameters at a glance

A radius of 3.68 Earth radii
A mass of 13.10 Earth masses
Surface gravity around 0.97 g
An orbital period of 28.731 days
Semi-major axis 0.1766 AU
Distance from Earth 712.85 light-years
Earth Similarity Index 0.570
Travel time at Voyager 1 speed 12,571,163 years

2 siblings around Kepler-19

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

Kepler-19 c Planet Profile

Physical Specs

Radius

3.68 R⊕

Radius (Jupiter)

0.328 R♃

Mass

13.10 M⊕

Mass (Jupiter)

0.041 M♃

Density

1.44 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.570

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Transit Timing Variations

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#98of 1978

top 4.9%

This planet

3.68R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-698 b 3.68 R⊕ Kepler-1016 c 3.68 R⊕ Kepler-318 c 3.68 R⊕

Metric	Earth	Kepler-19 c	Jupiter
Radius (R⊕)	1.00	3.68	11.21
Mass (M⊕)	1.00	13.10	317.83
Density (g/cm³)	5.51	1.44	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	13.100 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	16.580 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 122375047

Gaia DR2

Gaia DR2 2051106987063242880

Gaia DR3

Gaia DR3 2051106987063242880

System

Kepler-19

Percentile among Sub-Neptune cohort

Radius 3.680 R⊕ · percentile 95 / cohort 1978

Mass 13.100 M⊕ · percentile 88 / cohort 1978

Orbital period 28.73 d · percentile 72 / cohort 1946

Distance 218.56 pc · percentile 30 / cohort 1975

ESI 0.570 · percentile 79 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

28.731 days

Semi-major axis

0.1766 AU

Eccentricity

0.210

Inclination

— °

Year Length

A year here lasts approximately 28.73 Earth days (7.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1766 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.570

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Ballard et al. 2011

Instrument

Kepler CCD Array

Publication

2011-12

Observation locale

Space

Discovery cohort

Planets confirmed in 2011 at Kepler (12 shown).

Kepler-22 b · Sub-Neptune Kepler-20 d · Sub-Neptune Kepler-26 c · Sub-Neptune Kepler-26 b · Sub-Neptune Kepler-28 c · Super-Earth Kepler-10 c · Sub-Neptune Kepler-20 f · Rocky Terrestrial Kepler-42 d · Rocky Terrestrial Kepler-16 b · Neptune-like Kepler-28 b · Super-Earth Kepler-34 b · Neptune-like Kepler-29 c · Sub-Neptune

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

Wikipedia → Image: Wikimedia Commons · David Aguilar · Public domain