Key parameters at a glance

A radius of 3.03 Earth radii
A mass of 9.43 Earth masses
Surface gravity around 1.03 g
An orbital period of 9.614 days
Semi-major axis 0.0897 AU
Equilibrium temperature 931 K (658 °C)
Distance from Earth 3,062.10 light-years
Earth Similarity Index 0.250
Travel time at Voyager 1 speed 54,000,061 years

Kepler-498 b Planet Profile

Physical Specs

Radius

3.03 R⊕

Radius (Jupiter)

0.270 R♃

Mass

9.43 M⊕

Mass (Jupiter)

0.030 M♃

Density

1.86 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.250

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

#491of 1978

top 24.8%

This planet

3.03R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-245 d 3.03 R⊕ Kepler-162 c 3.03 R⊕ Kepler-893 b 3.03 R⊕

Metric	Earth	Kepler-498 b	Jupiter
Radius (R⊕)	1.00	3.03	11.21
Mass (M⊕)	1.00	9.43	317.83
Density (g/cm³)	5.51	1.86	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	202.78	0.037

Star Catalogue Identifiers

TIC

TIC 159384648

Gaia DR2

Gaia DR2 2126984220073270784

Gaia DR3

Gaia DR3 2126984220073270784

System

Kepler-498

Percentile among Sub-Neptune cohort

Radius 3.030 R⊕ · percentile 75 / cohort 1978

Mass 9.430 M⊕ · percentile 69 / cohort 1978

Orbital period 9.61 d · percentile 32 / cohort 1946

Distance 938.84 pc · percentile 74 / cohort 1975

ESI 0.250 · percentile 16 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.614 days

Semi-major axis

0.0897 AU

Eccentricity

0.000

Inclination

87.37 °

Year Length

A year here lasts approximately 9.61 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0897 AU.

Transit Fingerprint

Depth

0.080 %

Duration

4.731 h

Impact parameter b

0.070

Rp / R★

0.028574

Transit midpoint (BJD)

2,454,965.1851

Photometric dip

Transit produces a flux drop of 798 ppm lasting ≈ 4.73 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028574

Semi-major axis / stellar radius

10.790

Impact parameter (b)

0.070

Transit mid-time (BJD)

2,454,965.1851

Angular separation (arcsec)

0.09550

Eq. Temperature

931K

(658 °C)

Insolation (S⊕)

202.78

Earth = 1.00

Earth Similarity (ESI)

0.250

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

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-498

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,744 K — cooler than the Sun (5,778 K)

Estimated Age

3.89 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

0.464 g/cm³

Metallicity ratio

[Fe/H]

Distance

938.84 parsec

Light-years 3,062.10 ly

V-band magnitude

14.35 mag

Voyager-speed travel 54,000,061 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.036 mas

Total Proper Motion

2.848 mas/yr

PM Right Ascension

1.06 mas/yr

PM Declination

-2.64 mas/yr

Galactic Cartesian (pc)

x = 0.248 · y = -0.668 · z = 0.701

Equatorial (J2000)

RA 290.35816° · Dec 44.51872°

Galactic ℓ, b

76.243° · 13.703°

Ecliptic λ, β

306.562° · 65.394°

HTM-20 index

658525884