Key parameters at a glance

A radius of 3.58 Earth radii
A mass of 12.50 Earth masses
Surface gravity around 0.98 g
An orbital period of 3.166 days
Semi-major axis 0.0432 AU
Equilibrium temperature 1,273 K (1000 °C)
Distance from Earth 6,265.95 light-years
Earth Similarity Index 0.165
Travel time at Voyager 1 speed 110,499,951 years

Kepler-729 b Planet Profile

Physical Specs

Radius

3.58 R⊕

Radius (Jupiter)

0.319 R♃

Mass

12.50 M⊕

Mass (Jupiter)

0.039 M♃

Density

1.50 g/cm³

Surface Gravity

0.98 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.165

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

#144of 1978

top 7.2%

This planet

3.58R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-104 d 3.58 R⊕ MOA-2007-BLG-192L b 3.58 R⊕ K2-8 b 3.58 R⊕

Metric	Earth	Kepler-729 b	Jupiter
Radius (R⊕)	1.00	3.58	11.21
Mass (M⊕)	1.00	12.50	317.83
Density (g/cm³)	5.51	1.50	1.33
Surface Gravity (g)	1.00	0.98	2.53
Insolation (S⊕)	1.00	1,089.55	0.037

Star Catalogue Identifiers

TIC

TIC 158269049

Gaia DR2

Gaia DR2 2106432870280171136

Gaia DR3

Gaia DR3 2106432870280171136

System

Kepler-729

Percentile among Sub-Neptune cohort

Radius 3.580 R⊕ · percentile 93 / cohort 1978

Mass 12.500 M⊕ · percentile 85 / cohort 1978

Orbital period 3.17 d · percentile 5 / cohort 1946

Distance 1,921.15 pc · percentile 97 / cohort 1975

ESI 0.165 · percentile 3 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

3.166 days

Semi-major axis

0.0432 AU

Eccentricity

0.000

Inclination

89.76 °

Year Length

A year here lasts approximately 3.17 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0432 AU.

Transit Fingerprint

Depth

0.147 %

Duration

3.304 h

Impact parameter b

0.065

Rp / R★

0.036383

Transit midpoint (BJD)

2,455,003.9659

Photometric dip

Transit produces a flux drop of 1,473 ppm lasting ≈ 3.30 h.

Extended Orbital Architecture

Planet / star radius ratio

0.036383

Semi-major axis / stellar radius

7.578

Impact parameter (b)

0.065

Transit mid-time (BJD)

2,455,003.9659

Angular separation (arcsec)

0.02250

Eq. Temperature

1,273K

(1000 °C)

Insolation (S⊕)

1,089.55

Earth = 1.00

Earth Similarity (ESI)

0.165

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-729

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,633 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.05

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

0.827 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,921.15 parsec

Light-years 6,265.95 ly

V-band magnitude

15.57 mag

Voyager-speed travel 110,499,951 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.491 mas

Total Proper Motion

10.459 mas/yr

PM Right Ascension

-7.24 mas/yr

PM Declination

-7.55 mas/yr

Galactic Cartesian (pc)

x = 0.198 · y = -0.674 · z = 0.712

Equatorial (J2000)

RA 286.36006° · Dec 45.41427°

Galactic ℓ, b

75.932° · 16.655°

Ecliptic λ, β

300.571° · 67.125°

HTM-20 index

-1255378890