Key parameters at a glance

A radius of 2.94 Earth radii
A mass of 8.96 Earth masses
Surface gravity around 1.04 g
An orbital period of 28.685 days
Semi-major axis 0.1790 AU
Equilibrium temperature 547 K (274 °C)
Distance from Earth 3,833.57 light-years
Earth Similarity Index 0.430
Travel time at Voyager 1 speed 67,605,045 years

Kepler-1202 b Planet Profile

Physical Specs

Radius

2.94 R⊕

Radius (Jupiter)

0.262 R♃

Mass

8.96 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.94 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.430

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

#570of 1978

top 28.8%

This planet

2.94R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-210 b 2.94 R⊕ Kepler-67 b 2.94 R⊕ Kepler-58 d 2.94 R⊕

Metric	Earth	Kepler-1202 b	Jupiter
Radius (R⊕)	1.00	2.94	11.21
Mass (M⊕)	1.00	8.96	317.83
Density (g/cm³)	5.51	1.94	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	23.88	0.037

Star Catalogue Identifiers

TIC

TIC 63209010

Gaia DR2

Gaia DR2 2126579050039312640

Gaia DR3

Gaia DR3 2126579050039312640

System

Kepler-1202

Percentile among Sub-Neptune cohort

Radius 2.940 R⊕ · percentile 71 / cohort 1978

Mass 8.960 M⊕ · percentile 65 / cohort 1978

Orbital period 28.69 d · percentile 72 / cohort 1946

Distance 1,175.38 pc · percentile 86 / cohort 1975

ESI 0.430 · percentile 58 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

28.685 days

Semi-major axis

0.1790 AU

Eccentricity

0.000

Inclination

86.68 °

Year Length

A year here lasts approximately 28.69 Earth days (7.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1790 AU.

Transit Fingerprint

Depth

0.069 %

Duration

5.467 h

Impact parameter b

0.770

Rp / R★

0.026313

Transit midpoint (BJD)

2,454,992.8767

Photometric dip

Transit produces a flux drop of 689 ppm lasting ≈ 5.47 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026313

Semi-major axis / stellar radius

15.910

Impact parameter (b)

0.770

Transit mid-time (BJD)

2,454,992.8767

Angular separation (arcsec)

0.15200

Eq. Temperature

547K

(274 °C)

Insolation (S⊕)

23.88

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

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-1202

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,834 K — hotter than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.040 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

0.878 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,175.38 parsec

Light-years 3,833.57 ly

V-band magnitude

15.83 mag

Voyager-speed travel 67,605,045 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.823 mas

Total Proper Motion

4.716 mas/yr

PM Right Ascension

2.08 mas/yr

PM Declination

-4.23 mas/yr

Galactic Cartesian (pc)

x = 0.270 · y = -0.658 · z = 0.703

Equatorial (J2000)

RA 292.29061° · Dec 44.65323°

Galactic ℓ, b

76.973° · 12.517°

Ecliptic λ, β

309.754° · 65.045°

HTM-20 index

-797935367