Key parameters at a glance

A radius of 1.24 Earth radii
A mass of 2.07 Earth masses
Surface gravity around 1.35 g
An orbital period of 16.726 days
Semi-major axis 0.1260 AU
Equilibrium temperature 729 K (456 °C)
Distance from Earth 3,556.57 light-years
Earth Similarity Index 0.430
Travel time at Voyager 1 speed 62,720,075 years

1 sibling around Kepler-373

Kepler-373 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-373 b	Super-Earth	1.36	2.42	5.535	1,054	2014
Kepler-373 c this	Rocky Terrestrial	1.24	2.07	16.726	729	2014

Kepler-373 c Planet Profile

Physical Specs

Radius

1.24 R⊕

Radius (Jupiter)

0.111 R♃

Mass

2.07 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.97 g/cm³

Surface Gravity

1.35 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.430

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#4of 570

top 0.5%

This planet

1.24R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-354 d 1.24 R⊕ Kepler-383 c 1.24 R⊕ Wolf 327 b 1.24 R⊕

Metric	Earth	Kepler-373 c	Jupiter
Radius (R⊕)	1.00	1.24	11.21
Mass (M⊕)	1.00	2.07	317.83
Density (g/cm³)	5.51	5.97	1.33
Surface Gravity (g)	1.00	1.35	2.53
Insolation (S⊕)	1.00	103.76	0.037

Star Catalogue Identifiers

TIC

TIC 299218776

Gaia DR2

Gaia DR2 2133124511477266176

Gaia DR3

Gaia DR3 2133124511477266176

System

Kepler-373

Percentile among Rocky Terrestrial cohort

Radius 1.240 R⊕ · percentile 98 / cohort 570

Mass 2.070 M⊕ · percentile 89 / cohort 570

Orbital period 16.73 d · percentile 90 / cohort 567

Distance 1,090.45 pc · percentile 95 / cohort 566

ESI 0.430 · percentile 63 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

16.726 days

Semi-major axis

0.1260 AU

Eccentricity

0.000

Inclination

89.32 °

Year Length

A year here lasts approximately 16.73 Earth days (4.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1260 AU.

Transit Fingerprint

Depth

0.019 %

Duration

2.875 h

Impact parameter b

0.480

Rp / R★

0.013010

Transit midpoint (BJD)

2,454,976.7487

Photometric dip

Transit produces a flux drop of 195 ppm lasting ≈ 2.88 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013010

Semi-major axis / stellar radius

26.000

Impact parameter (b)

0.480

Transit mid-time (BJD)

2,454,976.7487

Angular separation (arcsec)

0.11600

Eq. Temperature

729K

(456 °C)

Insolation (S⊕)

103.76

Earth = 1.00

Earth Similarity (ESI)

0.430

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

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-373

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,787 K — hotter than the Sun (5,778 K)

Estimated Age

10.96 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.845 R☉

Stellar Mass

0.981 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.562 dex

Stellar density

0.430 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,090.45 parsec

Light-years 3,556.57 ly

V-band magnitude

14.60 mag

Voyager-speed travel 62,720,075 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.888 mas

Total Proper Motion

8.844 mas/yr

PM Right Ascension

-2.67 mas/yr

PM Declination

-8.43 mas/yr

Galactic Cartesian (pc)

x = 0.211 · y = -0.599 · z = 0.773

Equatorial (J2000)

RA 289.38799° · Dec 50.59701°

Galactic ℓ, b

81.740° · 16.745°

Ecliptic λ, β

311.043° · 71.283°

HTM-20 index

162817503