Key parameters at a glance

A radius of 2.54 Earth radii
A mass of 6.99 Earth masses
Surface gravity around 1.08 g
An orbital period of 40.110 days
Semi-major axis 0.2230 AU
Equilibrium temperature 556 K (283 °C)
Distance from Earth 3,800.83 light-years
Earth Similarity Index 0.448
Travel time at Voyager 1 speed 67,027,569 years

Kepler-902 b Planet Profile

Physical Specs

Radius

2.54 R⊕

Radius (Jupiter)

0.227 R♃

Mass

6.99 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.34 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.448

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

#1117of 1978

top 56.4%

This planet

2.54R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1116 b 2.54 R⊕ Kepler-325 c 2.54 R⊕ HD 189567 c 2.54 R⊕

Metric	Earth	Kepler-902 b	Jupiter
Radius (R⊕)	1.00	2.54	11.21
Mass (M⊕)	1.00	6.99	317.83
Density (g/cm³)	5.51	2.34	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	24.88	0.037

Star Catalogue Identifiers

TIC

TIC 159172027

Gaia DR2

Gaia DR2 2127832768171557632

Gaia DR3

Gaia DR3 2127832768171557632

System

Kepler-902

Percentile among Sub-Neptune cohort

Radius 2.540 R⊕ · percentile 43 / cohort 1978

Mass 6.990 M⊕ · percentile 40 / cohort 1978

Orbital period 40.11 d · percentile 81 / cohort 1946

Distance 1,165.34 pc · percentile 85 / cohort 1975

ESI 0.448 · percentile 62 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

40.110 days

Semi-major axis

0.2230 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 40.11 Earth days (11.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2230 AU.

Transit Fingerprint

Depth

0.073 %

Duration

5.184 h

Impact parameter b

0.845

Rp / R★

0.025122

Transit midpoint (BJD)

2,454,975.0783

Photometric dip

Transit produces a flux drop of 732 ppm lasting ≈ 5.18 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025122

Semi-major axis / stellar radius

60.240

Impact parameter (b)

0.845

Transit mid-time (BJD)

2,454,975.0783

Angular separation (arcsec)

0.19100

Eq. Temperature

556K

(283 °C)

Insolation (S⊕)

24.88

Earth = 1.00

Earth Similarity (ESI)

0.448

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-902

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,647 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

2.571 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,165.34 parsec

Light-years 3,800.83 ly

V-band magnitude

14.99 mag

Voyager-speed travel 67,027,569 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.830 mas

Total Proper Motion

8.511 mas/yr

PM Right Ascension

3.11 mas/yr

PM Declination

7.92 mas/yr

Galactic Cartesian (pc)

x = 0.230 · y = -0.643 · z = 0.731

Equatorial (J2000)

RA 289.73171° · Dec 46.95388°

Galactic ℓ, b

78.350° · 15.102°

Ecliptic λ, β

307.638° · 67.831°

HTM-20 index

1775429908