Key parameters at a glance

A radius of 1.31 Earth radii
A mass of 2.27 Earth masses
Surface gravity around 1.32 g
An orbital period of 7.128 days
Semi-major axis 0.0814 AU
Equilibrium temperature 1,373 K (1100 °C)
Distance from Earth 1,774.82 light-years
Earth Similarity Index 0.218
Travel time at Voyager 1 speed 31,298,954 years

Kepler-1298 b Planet Profile

Physical Specs

Radius

1.31 R⊕

Radius (Jupiter)

0.117 R♃

Mass

2.27 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.55 g/cm³

Surface Gravity

1.32 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.218

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

#1072of 1176

top 91.1%

This planet

1.31R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

TOI-5728 b 1.31 R⊕ Kepler-374 d 1.31 R⊕ Kepler-62 b 1.31 R⊕

Metric	Earth	Kepler-1298 b	Jupiter
Radius (R⊕)	1.00	1.31	11.21
Mass (M⊕)	1.00	2.27	317.83
Density (g/cm³)	5.51	5.55	1.33
Surface Gravity (g)	1.00	1.32	2.53
Insolation (S⊕)	1.00	1,003.03	0.037

Star Catalogue Identifiers

TIC

TIC 267667467

Gaia DR2

Gaia DR2 2132178725317511936

Gaia DR3

Gaia DR3 2132178725317511936

System

Kepler-1298

Percentile among Super-Earth cohort

Radius 1.310 R⊕ · percentile 8 / cohort 1176

Mass 2.270 M⊕ · percentile 8 / cohort 1176

Orbital period 7.13 d · percentile 53 / cohort 1164

Distance 544.16 pc · percentile 50 / cohort 1171

ESI 0.218 · percentile 16 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.128 days

Semi-major axis

0.0814 AU

Eccentricity

0.000

Inclination

88.82 °

Year Length

A year here lasts approximately 7.13 Earth days (2.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0814 AU.

Transit Fingerprint

Depth

0.005 %

Duration

5.614 h

Impact parameter b

0.845

Rp / R★

0.006214

Transit midpoint (BJD)

2,454,969.8831

Photometric dip

Transit produces a flux drop of 45 ppm lasting ≈ 5.61 h.

Extended Orbital Architecture

Planet / star radius ratio

0.006214

Semi-major axis / stellar radius

9.705

Impact parameter (b)

0.845

Transit mid-time (BJD)

2,454,969.8831

Angular separation (arcsec)

0.15000

Eq. Temperature

1,373K

(1100 °C)

Insolation (S⊕)

1,003.03

Earth = 1.00

Earth Similarity (ESI)

0.218

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1298

Spectral Class

F-type yellow-white

Effective Temperature

6,339 K — hotter than the Sun (5,778 K)

Estimated Age

2.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.000 R☉

Stellar Mass

1.450 M☉

Metallicity [Fe/H]

0.13

Extended Stellar Properties

Surface gravity (log g)

4.000 dex

Stellar density

0.130 g/cm³

Systemic radial velocity

-30.76 km/s

Metallicity ratio

[Fe/H]

Distance

544.16 parsec

Light-years 1,774.82 ly

V-band magnitude

11.39 mag

Voyager-speed travel 31,298,954 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.809 mas

Total Proper Motion

6.561 mas/yr

PM Right Ascension

0.97 mas/yr

PM Declination

-6.49 mas/yr

Galactic Cartesian (pc)

x = 0.163 · y = -0.634 · z = 0.756

Equatorial (J2000)

RA 284.42275° · Dec 49.10619°

Galactic ℓ, b

79.068° · 19.196°

Ecliptic λ, β

300.120° · 71.040°

HTM-20 index

-412978639