Key parameters at a glance

A radius of 2.39 Earth radii
A mass of 6.30 Earth masses
Surface gravity around 1.10 g
An orbital period of 13.719 days
Semi-major axis 0.1174 AU
Equilibrium temperature 864 K (591 °C)
Distance from Earth 3,171.13 light-years
Earth Similarity Index 0.297
Travel time at Voyager 1 speed 55,922,874 years

Kepler-798 b Planet Profile

Physical Specs

Radius

2.39 R⊕

Radius (Jupiter)

0.213 R♃

Mass

6.30 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.54 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.297

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

#1343of 1978

top 67.8%

This planet

2.39R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-193 b 2.39 R⊕ Kepler-152 c 2.39 R⊕ Kepler-238 c 2.39 R⊕

Metric	Earth	Kepler-798 b	Jupiter
Radius (R⊕)	1.00	2.39	11.21
Mass (M⊕)	1.00	6.30	317.83
Density (g/cm³)	5.51	2.54	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	141.89	0.037

Star Catalogue Identifiers

TIC

TIC 63214717

Gaia DR2

Gaia DR2 2125709405062046976

Gaia DR3

Gaia DR3 2125709405062046976

System

Kepler-798

Percentile among Sub-Neptune cohort

Radius 2.390 R⊕ · percentile 31 / cohort 1978

Mass 6.300 M⊕ · percentile 30 / cohort 1978

Orbital period 13.72 d · percentile 47 / cohort 1946

Distance 972.27 pc · percentile 76 / cohort 1975

ESI 0.297 · percentile 27 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

13.719 days

Semi-major axis

0.1174 AU

Eccentricity

0.000

Inclination

89.93 °

Year Length

A year here lasts approximately 13.72 Earth days (3.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1174 AU.

Transit Fingerprint

Depth

0.032 %

Duration

5.543 h

Impact parameter b

0.694

Rp / R★

0.016606

Transit midpoint (BJD)

2,454,973.7479

Photometric dip

Transit produces a flux drop of 316 ppm lasting ≈ 5.54 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016606

Semi-major axis / stellar radius

19.137

Impact parameter (b)

0.694

Transit mid-time (BJD)

2,454,973.7479

Angular separation (arcsec)

0.12100

Eq. Temperature

864K

(591 °C)

Insolation (S⊕)

141.89

Earth = 1.00

Earth Similarity (ESI)

0.297

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-798

Spectral Class

F-type yellow-white

Effective Temperature

6,224 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.290 R☉

Stellar Mass

1.190 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.704 g/cm³

Metallicity ratio

[Fe/H]

Distance

972.27 parsec

Light-years 3,171.13 ly

V-band magnitude

14.22 mag

Voyager-speed travel 55,922,874 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.000 mas

Total Proper Motion

9.681 mas/yr

PM Right Ascension

8.59 mas/yr

PM Declination

4.47 mas/yr

Galactic Cartesian (pc)

x = 0.283 · y = -0.685 · z = 0.671

Equatorial (J2000)

RA 292.47828° · Dec 42.14228°

Galactic ℓ, b

74.733° · 11.285°

Ecliptic λ, β

308.084° · 62.641°

HTM-20 index

-167255443