Key parameters at a glance

A radius of 2.29 Earth radii
A mass of 5.86 Earth masses
Surface gravity around 1.12 g
An orbital period of 15.187 days
Semi-major axis 0.1183 AU
Equilibrium temperature 789 K (516 °C)
Distance from Earth 3,079.70 light-years
Earth Similarity Index 0.332
Travel time at Voyager 1 speed 54,310,483 years

Kepler-1201 b Planet Profile

Physical Specs

Radius

2.29 R⊕

Radius (Jupiter)

0.204 R♃

Mass

5.86 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.68 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.332

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

#1519of 1978

top 76.7%

This planet

2.29R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-379 c 2.29 R⊕ Kepler-319 d 2.29 R⊕ Kepler-626 b 2.29 R⊕

Metric	Earth	Kepler-1201 b	Jupiter
Radius (R⊕)	1.00	2.29	11.21
Mass (M⊕)	1.00	5.86	317.83
Density (g/cm³)	5.51	2.68	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	89.43	0.037

Star Catalogue Identifiers

TIC

TIC 377915758

Gaia DR2

Gaia DR2 2076579445968420736

Gaia DR3

Gaia DR3 2076579445968420736

System

Kepler-1201

Percentile among Sub-Neptune cohort

Radius 2.290 R⊕ · percentile 23 / cohort 1978

Mass 5.860 M⊕ · percentile 22 / cohort 1978

Orbital period 15.19 d · percentile 51 / cohort 1946

Distance 944.24 pc · percentile 75 / cohort 1975

ESI 0.332 · percentile 36 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.187 days

Semi-major axis

0.1183 AU

Eccentricity

0.000

Inclination

86.77 °

Year Length

A year here lasts approximately 15.19 Earth days (4.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1183 AU.

Transit Fingerprint

Depth

0.029 %

Duration

4.508 h

Impact parameter b

0.760

Rp / R★

0.017486

Transit midpoint (BJD)

2,454,967.0558

Photometric dip

Transit produces a flux drop of 293 ppm lasting ≈ 4.51 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017486

Semi-major axis / stellar radius

14.870

Impact parameter (b)

0.760

Transit mid-time (BJD)

2,454,967.0558

Angular separation (arcsec)

0.12500

Eq. Temperature

789K

(516 °C)

Insolation (S⊕)

89.43

Earth = 1.00

Earth Similarity (ESI)

0.332

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-1201

Spectral Class

F-type yellow-white

Effective Temperature

6,177 K — hotter than the Sun (5,778 K)

Estimated Age

2.95 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.240 R☉

Stellar Mass

1.150 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.320 dex

Stellar density

0.270 g/cm³

Metallicity ratio

[Fe/H]

Distance

944.24 parsec

Light-years 3,079.70 ly

V-band magnitude

14.77 mag

Voyager-speed travel 54,310,483 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.031 mas

Total Proper Motion

11.399 mas/yr

PM Right Ascension

-6.45 mas/yr

PM Declination

-9.40 mas/yr

Galactic Cartesian (pc)

x = 0.315 · y = -0.688 · z = 0.654

Equatorial (J2000)

RA 294.61479° · Dec 40.83312°

Galactic ℓ, b

74.295° · 9.263°

Ecliptic λ, β

310.341° · 60.870°

HTM-20 index

1547845046