Key parameters at a glance

A radius of 1.26 Earth radii
A mass of 2.13 Earth masses
Surface gravity around 1.34 g
An orbital period of 39.859 days
Semi-major axis 0.2343 AU
Equilibrium temperature 597 K (324 °C)
Distance from Earth 3,637.78 light-years
Earth Similarity Index 0.522
Travel time at Voyager 1 speed 64,152,263 years

Kepler-1440 b Planet Profile

Physical Specs

Radius

1.26 R⊕

Radius (Jupiter)

0.112 R♃

Mass

2.13 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.85 g/cm³

Surface Gravity

1.34 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.522

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

#1149of 1176

top 97.6%

This planet

1.26R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-755 c 1.26 R⊕ Kepler-114 b 1.26 R⊕ Kepler-134 c 1.26 R⊕

Metric	Earth	Kepler-1440 b	Jupiter
Radius (R⊕)	1.00	1.26	11.21
Mass (M⊕)	1.00	2.13	317.83
Density (g/cm³)	5.51	5.85	1.33
Surface Gravity (g)	1.00	1.34	2.53
Insolation (S⊕)	1.00	44.73	0.037

Star Catalogue Identifiers

TIC

TIC 279917282

Gaia DR2

Gaia DR2 2131530769372738560

Gaia DR3

Gaia DR3 2131530769372738560

System

Kepler-1440

Percentile among Super-Earth cohort

Radius 1.260 R⊕ · percentile 2 / cohort 1176

Mass 2.130 M⊕ · percentile 3 / cohort 1176

Orbital period 39.86 d · percentile 94 / cohort 1164

Distance 1,115.35 pc · percentile 86 / cohort 1171

ESI 0.522 · percentile 75 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

39.859 days

Semi-major axis

0.2343 AU

Eccentricity

0.000

Inclination

89.36 °

Year Length

A year here lasts approximately 39.86 Earth days (10.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2343 AU.

Transit Fingerprint

Depth

0.016 %

Duration

8.060 h

Impact parameter b

0.030

Rp / R★

0.011871

Transit midpoint (BJD)

2,454,987.7608

Photometric dip

Transit produces a flux drop of 156 ppm lasting ≈ 8.06 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011871

Semi-major axis / stellar radius

36.800

Impact parameter (b)

0.030

Transit mid-time (BJD)

2,454,987.7608

Angular separation (arcsec)

0.21000

Eq. Temperature

597K

(324 °C)

Insolation (S⊕)

44.73

Earth = 1.00

Earth Similarity (ESI)

0.522

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-1440

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,698 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

0.300 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,115.35 parsec

Light-years 3,637.78 ly

V-band magnitude

14.24 mag

Voyager-speed travel 64,152,263 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.868 mas

Total Proper Motion

3.285 mas/yr

PM Right Ascension

1.93 mas/yr

PM Declination

-2.66 mas/yr

Galactic Cartesian (pc)

x = 0.176 · y = -0.641 · z = 0.747

Equatorial (J2000)

RA 285.34697° · Dec 48.31223°

Galactic ℓ, b

78.501° · 18.351°

Ecliptic λ, β

301.132° · 70.098°

HTM-20 index

-11201171