Key parameters at a glance

A radius of 1.17 Earth radii
A mass of 1.71 Earth masses
Surface gravity around 1.25 g
An orbital period of 16.225 days
Semi-major axis 0.1224 AU
Equilibrium temperature 788 K (515 °C)
Distance from Earth 3,548.15 light-years
Earth Similarity Index 0.403
Travel time at Voyager 1 speed 62,571,680 years

1 sibling around Kepler-647

Kepler-647 b 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-647 b this	Rocky Terrestrial	1.17	1.71	16.225	788	2016
Kepler-647 c	Neptune-like	4.00	15.10	29.666	644	2020

Kepler-647 b Planet Profile

Physical Specs

Radius

1.17 R⊕

Radius (Jupiter)

0.104 R♃

Mass

1.71 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.87 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.403

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

#135of 570

top 23.5%

This planet

1.17R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-339 d 1.17 R⊕ Kepler-185 b 1.17 R⊕ TOI-1442 b 1.17 R⊕

Metric	Earth	Kepler-647 b	Jupiter
Radius (R⊕)	1.00	1.17	11.21
Mass (M⊕)	1.00	1.71	317.83
Density (g/cm³)	5.51	5.87	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	162.79	0.037

Star Catalogue Identifiers

TIC

TIC 164786172

Gaia DR2

Gaia DR2 2106710978002603904

Gaia DR3

Gaia DR3 2106710978002603904

System

Kepler-647

Percentile among Rocky Terrestrial cohort

Radius 1.170 R⊕ · percentile 75 / cohort 570

Mass 1.710 M⊕ · percentile 69 / cohort 570

Orbital period 16.23 d · percentile 90 / cohort 567

Distance 1,087.87 pc · percentile 95 / cohort 566

ESI 0.403 · percentile 60 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

16.225 days

Semi-major axis

0.1224 AU

Eccentricity

0.000

Inclination

89.16 °

Year Length

A year here lasts approximately 16.23 Earth days (4.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1224 AU.

Transit Fingerprint

Depth

0.012 %

Duration

6.493 h

Impact parameter b

0.761

Rp / R★

0.010008

Transit midpoint (BJD)

2,454,977.0278

Photometric dip

Transit produces a flux drop of 120 ppm lasting ≈ 6.49 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010008

Semi-major axis / stellar radius

12.850

Impact parameter (b)

0.761

Transit mid-time (BJD)

2,454,977.0278

Angular separation (arcsec)

0.11200

Eq. Temperature

788K

(515 °C)

Insolation (S⊕)

162.79

Earth = 1.00

Earth Similarity (ESI)

0.403

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-647

Spectral Class

F-type yellow-white

Effective Temperature

6,020 K — hotter than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.070 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

0.310 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,087.87 parsec

Light-years 3,548.15 ly

V-band magnitude

14.07 mag

Voyager-speed travel 62,571,680 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.890 mas

Total Proper Motion

11.957 mas/yr

PM Right Ascension

0.83 mas/yr

PM Declination

-11.93 mas/yr

Galactic Cartesian (pc)

x = 0.182 · y = -0.689 · z = 0.702

Equatorial (J2000)

RA 284.78830° · Dec 44.59162°

Galactic ℓ, b

74.705° · 17.385°

Ecliptic λ, β

297.277° · 66.636°

HTM-20 index

1004515801