Key parameters at a glance

A radius of 2.17 Earth radii
A mass of 5.35 Earth masses
Surface gravity around 1.14 g
An orbital period of 5.633 days
Semi-major axis 0.0598 AU
Equilibrium temperature 844 K (571 °C)
Distance from Earth 1,815.80 light-years
Earth Similarity Index 0.316
Travel time at Voyager 1 speed 32,021,547 years

Kepler-499 b Planet Profile

Physical Specs

Radius

2.17 R⊕

Radius (Jupiter)

0.194 R♃

Mass

5.35 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.88 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.316

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

#1720of 1978

top 86.9%

This planet

2.17R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1329 b 2.17 R⊕ Kepler-797 b 2.17 R⊕ Kepler-304 c 2.17 R⊕

Metric	Earth	Kepler-499 b	Jupiter
Radius (R⊕)	1.00	2.17	11.21
Mass (M⊕)	1.00	5.35	317.83
Density (g/cm³)	5.51	2.88	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	148.46	0.037

Star Catalogue Identifiers

TIC

TIC 271430916

Gaia DR2

Gaia DR2 2078125359313871488

Gaia DR3

Gaia DR3 2078125359313871488

System

Kepler-499

Percentile among Sub-Neptune cohort

Radius 2.170 R⊕ · percentile 13 / cohort 1978

Mass 5.350 M⊕ · percentile 13 / cohort 1978

Orbital period 5.63 d · percentile 15 / cohort 1946

Distance 556.73 pc · percentile 50 / cohort 1975

ESI 0.316 · percentile 32 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.633 days

Semi-major axis

0.0598 AU

Eccentricity

0.000

Inclination

88.58 °

Year Length

A year here lasts approximately 5.63 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0598 AU.

Transit Fingerprint

Depth

0.065 %

Duration

2.153 h

Impact parameter b

0.455

Rp / R★

0.023970

Transit midpoint (BJD)

2,454,966.8179

Photometric dip

Transit produces a flux drop of 654 ppm lasting ≈ 2.15 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023970

Semi-major axis / stellar radius

17.270

Impact parameter (b)

0.455

Transit mid-time (BJD)

2,454,966.8179

Angular separation (arcsec)

0.10700

Eq. Temperature

844K

(571 °C)

Insolation (S⊕)

148.46

Earth = 1.00

Earth Similarity (ESI)

0.316

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-499

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,312 K — cooler than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.830 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.550 dex

Stellar density

3.714 g/cm³

Metallicity ratio

[Fe/H]

Distance

556.73 parsec

Light-years 1,815.80 ly

V-band magnitude

14.63 mag

Voyager-speed travel 32,021,547 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.768 mas

Total Proper Motion

19.538 mas/yr

PM Right Ascension

5.63 mas/yr

PM Declination

-18.71 mas/yr

Galactic Cartesian (pc)

x = 0.306 · y = -0.652 · z = 0.694

Equatorial (J2000)

RA 295.10995° · Dec 43.91510°

Galactic ℓ, b

77.233° · 10.383°

Ecliptic λ, β

313.457° · 63.614°

HTM-20 index

-1310072866