Key parameters at a glance

A radius of 3.93 Earth radii
A mass of 14.70 Earth masses
Surface gravity around 0.95 g
An orbital period of 81.416 days
Semi-major axis 0.4081 AU
Equilibrium temperature 522 K (249 °C)
Distance from Earth 1,985.25 light-years
Earth Similarity Index 0.397
Travel time at Voyager 1 speed 35,009,817 years

Kepler-1442 b Planet Profile

Physical Specs

Radius

3.93 R⊕

Radius (Jupiter)

0.351 R♃

Mass

14.70 M⊕

Mass (Jupiter)

0.046 M♃

Density

1.33 g/cm³

Surface Gravity

0.95 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.397

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

#15of 1978

top 0.7%

This planet

3.93R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-451 d 3.93 R⊕ GJ 876 e 3.92 R⊕ OGLE-2017-BLG-1691L b 3.92 R⊕

Metric	Earth	Kepler-1442 b	Jupiter
Radius (R⊕)	1.00	3.93	11.21
Mass (M⊕)	1.00	14.70	317.83
Density (g/cm³)	5.51	1.33	1.33
Surface Gravity (g)	1.00	0.95	2.53
Insolation (S⊕)	1.00	25.97	0.037

Star Catalogue Identifiers

TIC

TIC 350811132

Gaia DR2

Gaia DR2 2129357580341124608

Gaia DR3

Gaia DR3 2129357580341124608

System

Kepler-1442

Percentile among Sub-Neptune cohort

Radius 3.930 R⊕ · percentile 99 / cohort 1978

Mass 14.700 M⊕ · percentile 92 / cohort 1978

Orbital period 81.42 d · percentile 92 / cohort 1946

Distance 608.68 pc · percentile 53 / cohort 1975

ESI 0.397 · percentile 51 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

81.416 days

Semi-major axis

0.4081 AU

Eccentricity

0.000

Inclination

87.53 °

Year Length

A year here lasts approximately 81.42 Earth days (22.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4081 AU.

Transit Fingerprint

Depth

0.067 %

Duration

12.144 h

Impact parameter b

0.911

Rp / R★

0.024780

Transit midpoint (BJD)

2,454,993.8627

Photometric dip

Transit produces a flux drop of 666 ppm lasting ≈ 12.14 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024780

Semi-major axis / stellar radius

21.200

Impact parameter (b)

0.911

Transit mid-time (BJD)

2,454,993.8627

Angular separation (arcsec)

0.67100

Eq. Temperature

522K

(249 °C)

Insolation (S⊕)

25.97

Earth = 1.00

Earth Similarity (ESI)

0.397

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-1442

Spectral Class

F-type yellow-white

Effective Temperature

6,394 K — hotter than the Sun (5,778 K)

Estimated Age

1.70 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.440 R☉

Stellar Mass

1.340 M☉

Metallicity [Fe/H]

0.26

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.300 g/cm³

Systemic radial velocity

12.22 km/s

Metallicity ratio

[Fe/H]

Distance

608.68 parsec

Light-years 1,985.25 ly

V-band magnitude

12.11 mag

Voyager-speed travel 35,009,817 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

1.614 mas

Total Proper Motion

2.405 mas/yr

PM Right Ascension

-1.84 mas/yr

PM Declination

-1.55 mas/yr

Galactic Cartesian (pc)

x = 0.239 · y = -0.613 · z = 0.753

Equatorial (J2000)

RA 291.25562° · Dec 48.84692°

Galactic ℓ, b

80.571° · 14.941°

Ecliptic λ, β

312.187° · 69.193°

HTM-20 index

820368615