Confirmed Exoplanet Discovered 2016

Kepler-864 b

A sub-neptune orbiting the g-type yellow (sun-like) Kepler-864, located approximately 6,597.8 light-years from Earth.

Key parameters at a glance

  • A radius of 2.40 Earth radii
  • A mass of 6.35 Earth masses
  • Surface gravity around 1.10 g
  • An orbital period of 5.834 days
  • Semi-major axis 0.0687 AU
  • Equilibrium temperature 1,143 K (870 °C)
  • Distance from Earth 6,597.81 light-years
  • Earth Similarity Index 0.219
  • Travel time at Voyager 1 speed 116,352,368 years

1 sibling around Kepler-864

Kepler-864 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-864 c Super-Earth 1.62 3.26 2.422 1,532 2023
Kepler-864 b this Sub-Neptune 2.40 6.35 5.834 1,143 2016

Kepler-864 b Planet Profile

Physical Specs

Radius
2.40 R⊕
Radius (Jupiter)
0.214 R♃
Mass
6.35 M⊕
Mass (Jupiter)
0.020 M♃
Density
2.52 g/cm³
Surface Gravity
1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.219
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

#1333of 1978

top 67.3%

This planet

2.40R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-194 d 2.40 R⊕ KIC 8540376 c 2.40 R⊕ Kepler-112 c 2.40 R⊕
Metric Earth Kepler-864 b Jupiter
Radius (R⊕)1.002.4011.21
Mass (M⊕)1.006.35317.83
Density (g/cm³)5.512.521.33
Surface Gravity (g)1.001.102.53
Insolation (S⊕)1.00464.770.037

Star Catalogue Identifiers

TIC

TIC 164836049

Gaia DR2

Gaia DR2 2107279803471399168

Gaia DR3

Gaia DR3 2107279803471399168

System

Kepler-864

Percentile among Sub-Neptune cohort

Radius 2.400 R⊕ · percentile 32 / cohort 1978
Mass 6.350 M⊕ · percentile 31 / cohort 1978
Orbital period 5.83 d · percentile 16 / cohort 1946
Distance 2,022.90 pc · percentile 97 / cohort 1975
ESI 0.219 · percentile 10 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period
5.834 days
Semi-major axis
0.0687 AU
Eccentricity
0.000
Inclination
84.60 °

Year Length

A year here lasts approximately 5.83 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0687 AU.

Transit Fingerprint

Depth

0.053 %

Duration

3.859 h

Impact parameter b

0.265

Rp / R★

0.021603

Transit midpoint (BJD)

2,454,971.7487

Photometric dip

Transit produces a flux drop of 533 ppm lasting ≈ 3.86 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021603

Semi-major axis / stellar radius

11.410

Impact parameter (b)

0.265

Transit mid-time (BJD)

2,454,971.7487

Angular separation (arcsec)

0.03400

Eq. Temperature

1,143K

(870 °C)

Insolation (S⊕)

464.77

Earth = 1.00

Earth Similarity (ESI)

0.219

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-864

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,754 K — cooler than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.000 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

0.826 g/cm³

Metallicity ratio

[Fe/H]

Distance
2,022.90 parsec
Light-years 6,597.81 ly
V-band magnitude
15.90 mag
Voyager-speed travel 116,352,368 yr

Multi-band Host Photometry — 16 bands

9.216.316.34B15.90V15.78Gaia15.78Kepler15.31TESS16.24Sloan g15.71Sloan r15.58Sloan i15.55Sloan z14.68J14.38H14.22K14.25W114.31W212.75W39.22W4

Astrometric Data

Parallax

0.464 mas

Total Proper Motion

8.497 mas/yr

PM Right Ascension

1.43 mas/yr

PM Declination

-8.38 mas/yr

Galactic Cartesian (pc)

x = 0.179 · y = -0.667 · z = 0.723

Equatorial (J2000)

RA 285.05709° · Dec 46.32061°

Galactic ℓ, b

76.468° · 17.831°

Ecliptic λ, β

298.956° · 68.252°

HTM-20 index

-1346453015

Similar Worlds

Kepler-129 b

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 1,333.5 ly

Kepler-666 b

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 4,920.7 ly

HD 224018 d

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 344.0 ly

K2-187 d

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 1,079.3 ly

Kepler-112 c

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 1,673.9 ly

TOI-1269 b

Sub-Neptune · G-type yellow (Sun-like)

Radius 2.40 R⊕ · 561.4 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries Kepler Mission G-type yellow (Sun-like) Hosts