Key parameters at a glance

A radius of 2.26 Earth radii
A mass of 5.73 Earth masses
Surface gravity around 1.12 g
An orbital period of 29.907 days
Semi-major axis 0.1752 AU
Equilibrium temperature 564 K (291 °C)
Distance from Earth 1,675.62 light-years
Earth Similarity Index 0.462
Travel time at Voyager 1 speed 29,549,556 years

Kepler-649 b Planet Profile

Physical Specs

Radius

2.26 R⊕

Radius (Jupiter)

0.202 R♃

Mass

5.73 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.73 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.462

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

#1572of 1978

top 79.4%

This planet

2.26R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-163 c 2.26 R⊕ K2-346 b 2.26 R⊕ Kepler-154 b 2.26 R⊕

Metric	Earth	Kepler-649 b	Jupiter
Radius (R⊕)	1.00	2.26	11.21
Mass (M⊕)	1.00	5.73	317.83
Density (g/cm³)	5.51	2.73	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	25.15	0.037

Star Catalogue Identifiers

TIC

TIC 352012975

Gaia DR2

Gaia DR2 2106384010732717184

Gaia DR3

Gaia DR3 2106384010732717184

System

Kepler-649

Percentile among Sub-Neptune cohort

Radius 2.260 R⊕ · percentile 20 / cohort 1978

Mass 5.730 M⊕ · percentile 20 / cohort 1978

Orbital period 29.91 d · percentile 73 / cohort 1946

Distance 513.75 pc · percentile 48 / cohort 1975

ESI 0.462 · percentile 64 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

29.907 days

Semi-major axis

0.1752 AU

Eccentricity

0.000

Inclination

89.97 °

Year Length

A year here lasts approximately 29.91 Earth days (8.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1752 AU.

Transit Fingerprint

Depth

0.060 %

Duration

4.812 h

Impact parameter b

0.112

Rp / R★

0.022305

Transit midpoint (BJD)

2,455,008.2933

Photometric dip

Transit produces a flux drop of 597 ppm lasting ≈ 4.81 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022305

Semi-major axis / stellar radius

48.250

Impact parameter (b)

0.112

Transit mid-time (BJD)

2,455,008.2933

Angular separation (arcsec)

0.34100

Eq. Temperature

564K

(291 °C)

Insolation (S⊕)

25.15

Earth = 1.00

Earth Similarity (ESI)

0.462

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-649

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,871 K — hotter than the Sun (5,778 K)

Estimated Age

2.95 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.940 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

-0.17

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

1.030 g/cm³

Metallicity ratio

[Fe/H]

Distance

513.75 parsec

Light-years 1,675.62 ly

V-band magnitude

13.56 mag

Voyager-speed travel 29,549,556 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.918 mas

Total Proper Motion

27.949 mas/yr

PM Right Ascension

-17.06 mas/yr

PM Declination

-22.14 mas/yr

Galactic Cartesian (pc)

x = 0.191 · y = -0.680 · z = 0.708

Equatorial (J2000)

RA 285.65583° · Dec 45.07945°

Galactic ℓ, b

75.415° · 16.991°

Ecliptic λ, β

299.110° · 66.943°

HTM-20 index

-1999226043