Key parameters at a glance

A radius of 2.53 Earth radii
A mass of 6.94 Earth masses
Surface gravity around 1.08 g
An orbital period of 5.154 days
Semi-major axis 0.0546 AU
Equilibrium temperature 964 K (691 °C)
Distance from Earth 2,713.10 light-years
Earth Similarity Index 0.259
Travel time at Voyager 1 speed 47,845,562 years

Kepler-727 b Planet Profile

Physical Specs

Radius

2.53 R⊕

Radius (Jupiter)

0.226 R♃

Mass

6.94 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.35 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.259

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

#1133of 1978

top 57.2%

This planet

2.53R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-896 b 2.53 R⊕ Kepler-313 b 2.53 R⊕ TOI-1136 g 2.53 R⊕

Metric	Earth	Kepler-727 b	Jupiter
Radius (R⊕)	1.00	2.53	11.21
Mass (M⊕)	1.00	6.94	317.83
Density (g/cm³)	5.51	2.35	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	176.69	0.037

Star Catalogue Identifiers

TIC

TIC 271351820

Gaia DR2

Gaia DR2 2079877568529123328

Gaia DR3

Gaia DR3 2079877568529123328

System

Kepler-727

Percentile among Sub-Neptune cohort

Radius 2.530 R⊕ · percentile 42 / cohort 1978

Mass 6.940 M⊕ · percentile 39 / cohort 1978

Orbital period 5.15 d · percentile 13 / cohort 1946

Distance 831.84 pc · percentile 67 / cohort 1975

ESI 0.259 · percentile 18 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.154 days

Semi-major axis

0.0546 AU

Eccentricity

0.000

Inclination

80.10 °

Year Length

A year here lasts approximately 5.15 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0546 AU.

Transit Fingerprint

Depth

0.075 %

Duration

2.887 h

Impact parameter b

0.771

Rp / R★

0.027453

Transit midpoint (BJD)

2,455,004.6393

Photometric dip

Transit produces a flux drop of 746 ppm lasting ≈ 2.89 h.

Extended Orbital Architecture

Planet / star radius ratio

0.027453

Semi-major axis / stellar radius

5.430

Impact parameter (b)

0.771

Transit mid-time (BJD)

2,455,004.6393

Angular separation (arcsec)

0.06560

Eq. Temperature

964K

(691 °C)

Insolation (S⊕)

176.69

Earth = 1.00

Earth Similarity (ESI)

0.259

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-727

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,441 K — cooler than the Sun (5,778 K)

Estimated Age

4.79 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.890 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

0.573 g/cm³

Metallicity ratio

[Fe/H]

Distance

831.84 parsec

Light-years 2,713.10 ly

V-band magnitude

15.45 mag

Voyager-speed travel 47,845,562 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.174 mas

Total Proper Motion

3.965 mas/yr

PM Right Ascension

3.06 mas/yr

PM Declination

2.53 mas/yr

Galactic Cartesian (pc)

x = 0.297 · y = -0.641 · z = 0.708

Equatorial (J2000)

RA 294.84693° · Dec 45.03442°

Galactic ℓ, b

78.153° · 11.069°

Ecliptic λ, β

314.051° · 64.720°

HTM-20 index

-1148861159