Key parameters at a glance

A radius of 1.47 Earth radii
A mass of 2.76 Earth masses
Surface gravity around 1.28 g
An orbital period of 7.685 days
Semi-major axis 0.0732 AU
Equilibrium temperature 830 K (557 °C)
Distance from Earth 2,423.44 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 42,737,308 years

Kepler-1198 b Planet Profile

Physical Specs

Radius

1.47 R⊕

Radius (Jupiter)

0.131 R♃

Mass

2.76 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.77 g/cm³

Surface Gravity

1.28 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.366

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

#802of 1176

top 68.1%

This planet

1.47R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-292 c 1.47 R⊕ Kepler-10 b 1.47 R⊕ Kepler-137 b 1.47 R⊕

Metric	Earth	Kepler-1198 b	Jupiter
Radius (R⊕)	1.00	1.47	11.21
Mass (M⊕)	1.00	2.76	317.83
Density (g/cm³)	5.51	4.77	1.33
Surface Gravity (g)	1.00	1.28	2.53
Insolation (S⊕)	1.00	108.07	0.037

Star Catalogue Identifiers

TIC

TIC 158843826

Gaia DR2

Gaia DR2 2127139491730929536

Gaia DR3

Gaia DR3 2127139491730929536

System

Kepler-1198

Percentile among Super-Earth cohort

Radius 1.470 R⊕ · percentile 31 / cohort 1176

Mass 2.760 M⊕ · percentile 29 / cohort 1176

Orbital period 7.68 d · percentile 56 / cohort 1164

Distance 743.03 pc · percentile 63 / cohort 1171

ESI 0.366 · percentile 54 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.685 days

Semi-major axis

0.0732 AU

Eccentricity

0.000

Inclination

89.89 °

Year Length

A year here lasts approximately 7.68 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0732 AU.

Transit Fingerprint

Depth

0.027 %

Duration

2.599 h

Impact parameter b

0.060

Rp / R★

0.015441

Transit midpoint (BJD)

2,454,970.6399

Photometric dip

Transit produces a flux drop of 274 ppm lasting ≈ 2.60 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015441

Semi-major axis / stellar radius

24.328

Impact parameter (b)

0.060

Transit mid-time (BJD)

2,454,970.6399

Angular separation (arcsec)

0.09850

Eq. Temperature

830K

(557 °C)

Insolation (S⊕)

108.07

Earth = 1.00

Earth Similarity (ESI)

0.366

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-1198

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,517 K — cooler than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.900 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

3.851 g/cm³

Metallicity ratio

[Fe/H]

Distance

743.03 parsec

Light-years 2,423.44 ly

V-band magnitude

14.99 mag

Voyager-speed travel 42,737,308 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.317 mas

Total Proper Motion

11.178 mas/yr

PM Right Ascension

-1.98 mas/yr

PM Declination

-11.00 mas/yr

Galactic Cartesian (pc)

x = 0.229 · y = -0.671 · z = 0.705

Equatorial (J2000)

RA 288.83397° · Dec 44.83820°

Galactic ℓ, b

76.085° · 14.823°

Ecliptic λ, β

304.320° · 66.048°

HTM-20 index

1173089935