Key parameters at a glance

A radius of 1.25 Earth radii
A mass of 2.10 Earth masses
Surface gravity around 1.34 g
An orbital period of 0.741 days
Semi-major axis 0.0153 AU
Equilibrium temperature 1,873 K (1600 °C)
Distance from Earth 3,738.07 light-years
Earth Similarity Index 0.150
Travel time at Voyager 1 speed 65,920,930 years

Kepler-1377 b Planet Profile

Physical Specs

Radius

1.25 R⊕

Radius (Jupiter)

0.112 R♃

Mass

2.10 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.91 g/cm³

Surface Gravity

1.34 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.150

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

#1161of 1176

top 98.6%

This planet

1.25R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-445 d 1.25 R⊕ Kepler-1074 b 1.25 R⊕ Kepler-150 b 1.25 R⊕

Metric	Earth	Kepler-1377 b	Jupiter
Radius (R⊕)	1.00	1.25	11.21
Mass (M⊕)	1.00	2.10	317.83
Density (g/cm³)	5.51	5.91	1.33
Surface Gravity (g)	1.00	1.34	2.53
Insolation (S⊕)	1.00	2,909.21	0.037

Star Catalogue Identifiers

TIC

TIC 158986227

Gaia DR2

Gaia DR2 2127755733639236992

Gaia DR3

Gaia DR3 2127755733639236992

System

Kepler-1377

Percentile among Super-Earth cohort

Radius 1.250 R⊕ · percentile 0 / cohort 1176

Mass 2.100 M⊕ · percentile 2 / cohort 1176

Orbital period 0.74 d · percentile 3 / cohort 1164

Distance 1,146.10 pc · percentile 88 / cohort 1171

ESI 0.150 · percentile 4 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.741 days

Semi-major axis

0.0153 AU

Eccentricity

0.000

Inclination

87.91 °

Year Length

A year here lasts roughly 17.8 hours long on a nearly circular orbit at a mean orbital distance of 0.0153 AU.

Transit Fingerprint

Depth

0.020 %

Duration

1.120 h

Impact parameter b

0.202

Rp / R★

0.013800

Transit midpoint (BJD)

2,454,964.9093

Photometric dip

Transit produces a flux drop of 196 ppm lasting ≈ 1.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013800

Semi-major axis / stellar radius

5.561

Impact parameter (b)

0.202

Transit mid-time (BJD)

2,454,964.9093

Angular separation (arcsec)

0.01330

Eq. Temperature

1,873K

(1600 °C)

Insolation (S⊕)

2,909.21

Earth = 1.00

Earth Similarity (ESI)

0.150

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1377

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,218 K — cooler than the Sun (5,778 K)

Estimated Age

5.01 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.820 R☉

Stellar Mass

0.860 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.550 dex

Stellar density

4.418 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,146.10 parsec

Light-years 3,738.07 ly

V-band magnitude

15.86 mag

Voyager-speed travel 65,920,930 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.845 mas

Total Proper Motion

12.526 mas/yr

PM Right Ascension

-5.07 mas/yr

PM Declination

-11.46 mas/yr

Galactic Cartesian (pc)

x = 0.226 · y = -0.648 · z = 0.727

Equatorial (J2000)

RA 289.19542° · Dec 46.65161°

Galactic ℓ, b

77.911° · 15.318°

Ecliptic λ, β

306.451° · 67.676°

HTM-20 index

1871441225