Key parameters at a glance

A radius of 3.22 Earth radii
A mass of 10.50 Earth masses
Surface gravity around 1.01 g
An orbital period of 17.421 days
Semi-major axis 0.1332 AU
Equilibrium temperature 674 K (401 °C)
Distance from Earth 2,074.45 light-years
Earth Similarity Index 0.340
Travel time at Voyager 1 speed 36,582,924 years

Kepler-648 b Planet Profile

Physical Specs

Radius

3.22 R⊕

Radius (Jupiter)

0.287 R♃

Mass

10.50 M⊕

Mass (Jupiter)

0.033 M♃

Density

1.73 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.340

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

#332of 1978

top 16.7%

This planet

3.22R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-3493 b 3.22 R⊕ K2-63 b 3.22 R⊕ Kepler-472 b 3.22 R⊕

Metric	Earth	Kepler-648 b	Jupiter
Radius (R⊕)	1.00	3.22	11.21
Mass (M⊕)	1.00	10.50	317.83
Density (g/cm³)	5.51	1.73	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	47.34	0.037

Star Catalogue Identifiers

TIC

TIC 164560223

Gaia DR2

Gaia DR2 2106784610922074496

Gaia DR3

Gaia DR3 2106784610922074496

System

Kepler-648

Percentile among Sub-Neptune cohort

Radius 3.220 R⊕ · percentile 83 / cohort 1978

Mass 10.500 M⊕ · percentile 76 / cohort 1978

Orbital period 17.42 d · percentile 57 / cohort 1946

Distance 636.03 pc · percentile 55 / cohort 1975

ESI 0.340 · percentile 38 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

17.421 days

Semi-major axis

0.1332 AU

Eccentricity

0.000

Inclination

88.24 °

Year Length

A year here lasts approximately 17.42 Earth days (4.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1332 AU.

Transit Fingerprint

Depth

0.093 %

Duration

5.032 h

Impact parameter b

0.752

Rp / R★

0.029961

Transit midpoint (BJD)

2,455,017.2462

Photometric dip

Transit produces a flux drop of 928 ppm lasting ≈ 5.03 h.

Extended Orbital Architecture

Planet / star radius ratio

0.029961

Semi-major axis / stellar radius

18.400

Impact parameter (b)

0.752

Transit mid-time (BJD)

2,455,017.2462

Angular separation (arcsec)

0.20900

Eq. Temperature

674K

(401 °C)

Insolation (S⊕)

47.34

Earth = 1.00

Earth Similarity (ESI)

0.340

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-648

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,741 K — cooler than the Sun (5,778 K)

Estimated Age

1.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.980 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

0.21

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

1.220 g/cm³

Metallicity ratio

[Fe/H]

Distance

636.03 parsec

Light-years 2,074.45 ly

V-band magnitude

14.03 mag

Voyager-speed travel 36,582,924 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.544 mas

Total Proper Motion

4.088 mas/yr

PM Right Ascension

-2.56 mas/yr

PM Declination

3.19 mas/yr

Galactic Cartesian (pc)

x = 0.170 · y = -0.686 · z = 0.707

Equatorial (J2000)

RA 283.89962° · Dec 45.01691°

Galactic ℓ, b

74.886° · 18.126°

Ecliptic λ, β

295.993° · 67.206°

HTM-20 index

481048126