Key parameters at a glance

A radius of 2.16 Earth radii
A mass of 5.31 Earth masses
Surface gravity around 1.14 g
An orbital period of 9.931 days
Semi-major axis 0.0915 AU
Equilibrium temperature 931 K (658 °C)
Distance from Earth 5,806.82 light-years
Earth Similarity Index 0.285
Travel time at Voyager 1 speed 102,403,198 years

Kepler-745 b Planet Profile

Physical Specs

Radius

2.16 R⊕

Radius (Jupiter)

0.193 R♃

Mass

5.31 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.90 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.285

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

#1731of 1978

top 87.5%

This planet

2.16R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-291 b 2.16 R⊕ Kepler-142 d 2.16 R⊕ Kepler-308 c 2.16 R⊕

Metric	Earth	Kepler-745 b	Jupiter
Radius (R⊕)	1.00	2.16	11.21
Mass (M⊕)	1.00	5.31	317.83
Density (g/cm³)	5.51	2.90	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	286.03	0.037

Star Catalogue Identifiers

TIC

TIC 137307173

Gaia DR2

Gaia DR2 2051748659478657152

Gaia DR3

Gaia DR3 2051748659478657152

System

Kepler-745

Percentile among Sub-Neptune cohort

Radius 2.160 R⊕ · percentile 12 / cohort 1978

Mass 5.310 M⊕ · percentile 13 / cohort 1978

Orbital period 9.93 d · percentile 34 / cohort 1946

Distance 1,780.38 pc · percentile 96 / cohort 1975

ESI 0.285 · percentile 24 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.931 days

Semi-major axis

0.0915 AU

Eccentricity

0.000

Inclination

89.84 °

Year Length

A year here lasts approximately 9.93 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0915 AU.

Transit Fingerprint

Depth

0.040 %

Duration

5.659 h

Impact parameter b

0.792

Rp / R★

0.019220

Transit midpoint (BJD)

2,454,969.4930

Photometric dip

Transit produces a flux drop of 399 ppm lasting ≈ 5.66 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019220

Semi-major axis / stellar radius

13.607

Impact parameter (b)

0.792

Transit mid-time (BJD)

2,454,969.4930

Angular separation (arcsec)

0.05140

Eq. Temperature

931K

(658 °C)

Insolation (S⊕)

286.03

Earth = 1.00

Earth Similarity (ESI)

0.285

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-745

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,849 K — hotter than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.040 R☉

Stellar Mass

1.040 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

0.487 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,780.38 parsec

Light-years 5,806.82 ly

V-band magnitude

15.43 mag

Voyager-speed travel 102,403,198 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

0.534 mas

Total Proper Motion

6.590 mas/yr

PM Right Ascension

1.50 mas/yr

PM Declination

-6.42 mas/yr

Galactic Cartesian (pc)

x = 0.292 · y = -0.742 · z = 0.603

Equatorial (J2000)

RA 291.49944° · Dec 37.05926°

Galactic ℓ, b

69.769° · 9.677°

Ecliptic λ, β

303.518° · 58.023°

HTM-20 index

-1728210850