Key parameters at a glance

A radius of 0.86 Earth radii
A mass of 0.57 Earth masses
Surface gravity around 0.77 g
An orbital period of 3.576 days
Semi-major axis 0.0430 AU
Equilibrium temperature 1,061 K (788 °C)
Distance from Earth 1,269.21 light-years
Earth Similarity Index 0.291
Travel time at Voyager 1 speed 22,382,574 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1361 b Planet Profile

Physical Specs

Radius

0.86 R⊕

Radius (Jupiter)

0.077 R♃

Mass

0.57 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.89 g/cm³

Surface Gravity

0.77 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.291

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

#444of 570

top 77.7%

This planet

0.86R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1258 b 0.86 R⊕ Kepler-352 b 0.86 R⊕ Kepler-107 d 0.86 R⊕

Metric	Earth	Kepler-1361 b	Jupiter
Radius (R⊕)	1.00	0.86	11.21
Mass (M⊕)	1.00	0.57	317.83
Density (g/cm³)	5.51	4.89	1.33
Surface Gravity (g)	1.00	0.77	2.53
Insolation (S⊕)	1.00	186.07	0.037

Star Catalogue Identifiers

TIC

TIC 164525875

Gaia DR2

Gaia DR2 2107563271311787136

Gaia DR3

Gaia DR3 2107563271311787136

System

Kepler-1361

Percentile among Rocky Terrestrial cohort

Radius 0.860 R⊕ · percentile 21 / cohort 570

Mass 0.566 M⊕ · percentile 17 / cohort 570

Orbital period 3.58 d · percentile 39 / cohort 567

Distance 389.14 pc · percentile 51 / cohort 566

ESI 0.291 · percentile 36 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.576 days

Semi-major axis

0.0430 AU

Eccentricity

0.000

Inclination

87.45 °

Year Length

A year here lasts approximately 3.58 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0430 AU.

Transit Fingerprint

Depth

0.010 %

Duration

2.463 h

Impact parameter b

0.462

Rp / R★

0.009991

Transit midpoint (BJD)

2,454,965.8583

Photometric dip

Transit produces a flux drop of 97 ppm lasting ≈ 2.46 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009991

Semi-major axis / stellar radius

10.380

Impact parameter (b)

0.462

Transit mid-time (BJD)

2,454,965.8583

Angular separation (arcsec)

0.11100

Eq. Temperature

1,061K

(788 °C)

Insolation (S⊕)

186.07

Earth = 1.00

Earth Similarity (ESI)

0.291

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

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-1361

Spectral Class

K-type orange

Effective Temperature

5,131 K — cooler than the Sun (5,778 K)

Estimated Age

4.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.790 R☉

Stellar Mass

0.830 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.570 dex

Stellar density

1.820 g/cm³

Systemic radial velocity

-33.40 km/s

Rotational v·sin i

3.40 km/s

Metallicity ratio

[Fe/H]

Distance

389.14 parsec

Light-years 1,269.21 ly

V-band magnitude

14.10 mag

Voyager-speed travel 22,382,574 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.541 mas

Total Proper Motion

11.035 mas/yr

PM Right Ascension

8.11 mas/yr

PM Declination

-7.48 mas/yr

Galactic Cartesian (pc)

x = 0.160 · y = -0.664 · z = 0.730

Equatorial (J2000)

RA 283.56536° · Dec 46.90423°

Galactic ℓ, b

76.670° · 18.994°

Ecliptic λ, β

296.677° · 69.090°

HTM-20 index

1346416436