Key parameters at a glance

A radius of 3.68 Earth radii
A mass of 13.10 Earth masses
Surface gravity around 0.97 g
An orbital period of 16.330 days
Semi-major axis 0.1255 AU
Equilibrium temperature 727 K (454 °C)
Distance from Earth 6,508.67 light-years
Earth Similarity Index 0.298
Travel time at Voyager 1 speed 114,780,412 years

Kepler-698 b Planet Profile

Physical Specs

Radius

3.68 R⊕

Radius (Jupiter)

0.328 R♃

Mass

13.10 M⊕

Mass (Jupiter)

0.041 M♃

Density

1.44 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.298

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

#98of 1978

top 4.9%

This planet

3.68R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-19 c 3.68 R⊕ Kepler-1016 c 3.68 R⊕ Kepler-318 c 3.68 R⊕

Metric	Earth	Kepler-698 b	Jupiter
Radius (R⊕)	1.00	3.68	11.21
Mass (M⊕)	1.00	13.10	317.83
Density (g/cm³)	5.51	1.44	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	172.56	0.037

Star Catalogue Identifiers

TIC

TIC 121729607

Gaia DR2

Gaia DR2 2102170235500805376

Gaia DR3

Gaia DR3 2102170235500805376

System

Kepler-698

Percentile among Sub-Neptune cohort

Radius 3.680 R⊕ · percentile 95 / cohort 1978

Mass 13.100 M⊕ · percentile 88 / cohort 1978

Orbital period 16.33 d · percentile 54 / cohort 1946

Distance 1,995.57 pc · percentile 97 / cohort 1975

ESI 0.298 · percentile 27 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

16.330 days

Semi-major axis

0.1255 AU

Eccentricity

0.000

Inclination

86.59 °

Year Length

A year here lasts approximately 16.33 Earth days (4.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1255 AU.

Transit Fingerprint

Depth

0.119 %

Duration

6.373 h

Impact parameter b

0.596

Rp / R★

0.037006

Transit midpoint (BJD)

2,455,010.2951

Photometric dip

Transit produces a flux drop of 1,188 ppm lasting ≈ 6.37 h.

Extended Orbital Architecture

Planet / star radius ratio

0.037006

Semi-major axis / stellar radius

17.500

Impact parameter (b)

0.596

Transit mid-time (BJD)

2,455,010.2951

Angular separation (arcsec)

0.06290

Eq. Temperature

727K

(454 °C)

Insolation (S⊕)

172.56

Earth = 1.00

Earth Similarity (ESI)

0.298

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-698

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,612 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

0.139 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,995.57 parsec

Light-years 6,508.67 ly

V-band magnitude

15.72 mag

Voyager-speed travel 114,780,412 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.472 mas

Total Proper Motion

3.946 mas/yr

PM Right Ascension

-0.68 mas/yr

PM Declination

-3.89 mas/yr

Galactic Cartesian (pc)

x = 0.238 · y = -0.712 · z = 0.660

Equatorial (J2000)

RA 288.51000° · Dec 41.30175°

Galactic ℓ, b

72.654° · 13.599°

Ecliptic λ, β

301.374° · 62.739°

HTM-20 index

-1105460279