Confirmed Exoplanet Discovered 2014

Kepler-207 c

A super-earth orbiting the g-type yellow (sun-like) Kepler-207, located approximately 2,855.6 light-years from Earth.

Key parameters at a glance

  • A radius of 1.50 Earth radii
  • A mass of 2.86 Earth masses
  • Surface gravity around 1.27 g
  • An orbital period of 3.072 days
  • Semi-major axis 0.0440 AU
  • Equilibrium temperature 1,556 K (1283 °C)
  • Distance from Earth 2,855.56 light-years
  • Earth Similarity Index 0.181
  • Travel time at Voyager 1 speed 50,357,758 years

2 siblings around Kepler-207

Kepler-207 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-207 b Super-Earth 1.57 3.09 1.612 1,930 2014
Kepler-207 c this Super-Earth 1.50 2.86 3.072 1,556 2014
Kepler-207 d Sub-Neptune 3.31 11.00 5.868 1,254 2014

Kepler-207 c Planet Profile

Physical Specs

Radius
1.50 R⊕
Radius (Jupiter)
0.134 R♃
Mass
2.86 M⊕
Mass (Jupiter)
0.009 M♃
Density
4.66 g/cm³
Surface Gravity
1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.181
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

#748of 1176

top 63.5%

This planet

1.50R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Metric Earth Kepler-207 c Jupiter
Radius (R⊕)1.001.5011.21
Mass (M⊕)1.002.86317.83
Density (g/cm³)5.514.661.33
Surface Gravity (g)1.001.272.53
Insolation (S⊕)1.001,742.720.037

Star Catalogue Identifiers

TIC

TIC 159217436

Gaia DR2

Gaia DR2 2101898759208960640

Gaia DR3

Gaia DR3 2101898759208960640

System

Kepler-207

Percentile among Super-Earth cohort

Radius 1.500 R⊕ · percentile 35 / cohort 1176
Mass 2.860 M⊕ · percentile 33 / cohort 1176
Orbital period 3.07 d · percentile 22 / cohort 1164
Distance 875.52 pc · percentile 73 / cohort 1171
ESI 0.181 · percentile 9 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period
3.072 days
Semi-major axis
0.0440 AU
Eccentricity
0.000
Inclination
74.56 °

Year Length

A year here lasts approximately 3.07 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0440 AU.

Transit Fingerprint

Depth

0.009 %

Duration

4.077 h

Impact parameter b

0.180

Rp / R★

0.008769

Transit midpoint (BJD)

2,454,966.3043

Photometric dip

Transit produces a flux drop of 91 ppm lasting ≈ 4.08 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008769

Semi-major axis / stellar radius

4.550

Impact parameter (b)

0.180

Transit mid-time (BJD)

2,454,966.3043

Angular separation (arcsec)

0.05030

Eq. Temperature

1,556K

(1283 °C)

Insolation (S⊕)

1,742.72

Earth = 1.00

Earth Similarity (ESI)

0.181

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Host System: Kepler-207

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,920 K — hotter than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.588 R☉

Stellar Mass

1.313 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.129 dex

Stellar density

0.280 g/cm³

Metallicity ratio

[Fe/H]

Distance
875.52 parsec
Light-years 2,855.56 ly
V-band magnitude
13.16 mag
Voyager-speed travel 50,357,758 yr

Multi-band Host Photometry — 16 bands

9.113.713.72B13.16V13.17Gaia13.18Kepler12.74TESS13.59Sloan g13.13Sloan r13.01Sloan i12.98Sloan z12.10J11.84H11.81K11.77W111.83W211.89W39.11W4

Astrometric Data

Parallax

1.113 mas

Total Proper Motion

2.762 mas/yr

PM Right Ascension

-0.10 mas/yr

PM Declination

2.76 mas/yr

Galactic Cartesian (pc)

x = 0.254 · y = -0.696 · z = 0.671

Equatorial (J2000)

RA 290.03052° · Dec 42.16606°

Galactic ℓ, b

73.947° · 12.929°

Ecliptic λ, β

304.317° · 63.238°

HTM-20 index

445333241

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