Key parameters at a glance

A radius of 1.39 Earth radii
A mass of 2.51 Earth masses
Surface gravity around 1.30 g
An orbital period of 12.510 days
Semi-major axis 0.1090 AU
Equilibrium temperature 875 K (602 °C)
Distance from Earth 2,686.89 light-years
Earth Similarity Index 0.352
Travel time at Voyager 1 speed 47,383,235 years

1 sibling around Kepler-377

Kepler-377 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-377 b this	Super-Earth	1.39	2.51	12.510	875	2014
Kepler-377 c	Sub-Neptune	2.06	4.90	27.015	677	2014

Kepler-377 b Planet Profile

Physical Specs

Radius

1.39 R⊕

Radius (Jupiter)

0.124 R♃

Mass

2.51 M⊕

Mass (Jupiter)

0.008 M♃

Density

5.14 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.352

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#940of 1176

top 79.8%

This planet

1.39R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-224 b 1.39 R⊕ Kepler-208 c 1.39 R⊕ TOI-1749 b 1.39 R⊕

Metric	Earth	Kepler-377 b	Jupiter
Radius (R⊕)	1.00	1.39	11.21
Mass (M⊕)	1.00	2.51	317.83
Density (g/cm³)	5.51	5.14	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	139.11	0.037

Star Catalogue Identifiers

TIC

TIC 184015535

Gaia DR2

Gaia DR2 2073157456550947200

Gaia DR3

Gaia DR3 2073157456550947200

System

Kepler-377

Percentile among Super-Earth cohort

Radius 1.390 R⊕ · percentile 19 / cohort 1176

Mass 2.510 M⊕ · percentile 19 / cohort 1176

Orbital period 12.51 d · percentile 71 / cohort 1164

Distance 823.80 pc · percentile 70 / cohort 1171

ESI 0.352 · percentile 51 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

12.510 days

Semi-major axis

0.1090 AU

Eccentricity

0.000

Inclination

88.36 °

Year Length

A year here lasts approximately 12.51 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1090 AU.

Transit Fingerprint

Depth

0.016 %

Duration

4.022 h

Impact parameter b

0.060

Rp / R★

0.011945

Transit midpoint (BJD)

2,454,970.0076

Photometric dip

Transit produces a flux drop of 155 ppm lasting ≈ 4.02 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011945

Semi-major axis / stellar radius

20.300

Impact parameter (b)

0.060

Transit mid-time (BJD)

2,454,970.0076

Angular separation (arcsec)

0.13200

Eq. Temperature

875K

(602 °C)

Insolation (S⊕)

139.11

Earth = 1.00

Earth Similarity (ESI)

0.352

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

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-377

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,949 K — hotter than the Sun (5,778 K)

Estimated Age

5.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.224 R☉

Stellar Mass

1.043 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.303 dex

Stellar density

0.660 g/cm³

Metallicity ratio

[Fe/H]

Distance

823.80 parsec

Light-years 2,686.89 ly

V-band magnitude

14.08 mag

Voyager-speed travel 47,383,235 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.185 mas

Total Proper Motion

7.305 mas/yr

PM Right Ascension

7.27 mas/yr

PM Declination

-0.70 mas/yr

Galactic Cartesian (pc)

x = 0.335 · y = -0.705 · z = 0.626

Equatorial (J2000)

RA 295.42207° · Dec 38.73567°

Galactic ℓ, b

72.728° · 7.720°

Ecliptic λ, β

310.109° · 58.686°

HTM-20 index

-1936887137