Key parameters at a glance

A radius of 1.78 Earth radii
A mass of 3.82 Earth masses
Surface gravity around 1.21 g
An orbital period of 16.178 days
Semi-major axis 0.1285 AU
Equilibrium temperature 754 K (481 °C)
Distance from Earth 3,921.93 light-years
Earth Similarity Index 0.380
Travel time at Voyager 1 speed 69,163,197 years

Kepler-1645 b Planet Profile

Physical Specs

Radius

1.78 R⊕

Radius (Jupiter)

0.159 R♃

Mass

3.82 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.72 g/cm³

Surface Gravity

1.21 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.380

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

#282of 1176

top 23.9%

This planet

1.78R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1544 b 1.78 R⊕ Kepler-881 b 1.78 R⊕ GJ 676 A d 1.78 R⊕

Metric	Earth	Kepler-1645 b	Jupiter
Radius (R⊕)	1.00	1.78	11.21
Mass (M⊕)	1.00	3.82	317.83
Density (g/cm³)	5.51	3.72	1.33
Surface Gravity (g)	1.00	1.21	2.53
Insolation (S⊕)	1.00	138.54	0.037

Star Catalogue Identifiers

TIC

TIC 28229515

Gaia DR2

Gaia DR2 2086724227433964928

Gaia DR3

Gaia DR3 2086724227433964928

System

Kepler-1645

Percentile among Super-Earth cohort

Radius 1.780 R⊕ · percentile 75 / cohort 1176

Mass 3.820 M⊕ · percentile 69 / cohort 1176

Orbital period 16.18 d · percentile 80 / cohort 1164

Distance 1,202.47 pc · percentile 89 / cohort 1171

ESI 0.380 · percentile 57 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

16.178 days

Semi-major axis

0.1285 AU

Eccentricity

0.000

Inclination

89.81 °

Year Length

A year here lasts approximately 16.18 Earth days (4.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1285 AU.

Transit Fingerprint

Depth

0.030 %

Duration

5.269 h

Impact parameter b

0.081

Rp / R★

0.016193

Transit midpoint (BJD)

2,454,965.3363

Photometric dip

Transit produces a flux drop of 299 ppm lasting ≈ 5.27 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016193

Semi-major axis / stellar radius

24.260

Impact parameter (b)

0.081

Transit mid-time (BJD)

2,454,965.3363

Angular separation (arcsec)

0.10700

Eq. Temperature

754K

(481 °C)

Insolation (S⊕)

138.54

Earth = 1.00

Earth Similarity (ESI)

0.380

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-1645

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,812 K — hotter than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

0.636 g/cm³

Systemic radial velocity

-82.15 km/s

Rotational v·sin i

5.00 km/s

Metallicity ratio

[Fe/H]

Distance

1,202.47 parsec

Light-years 3,921.93 ly

V-band magnitude

14.57 mag

Voyager-speed travel 69,163,197 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.803 mas

Total Proper Motion

5.182 mas/yr

PM Right Ascension

5.14 mas/yr

PM Declination

0.67 mas/yr

Galactic Cartesian (pc)

x = 0.306 · y = -0.589 · z = 0.748

Equatorial (J2000)

RA 297.47951° · Dec 48.41858°

Galactic ℓ, b

82.060° · 11.069°

Ecliptic λ, β

321.602° · 67.000°

HTM-20 index

2139222732