Key parameters at a glance

A radius of 7.72 Earth radii
A mass of 15.00 Earth masses
Surface gravity around 0.25 g
An orbital period of 210.735 days
Semi-major axis 0.7170 AU
Equilibrium temperature 342 K (69 °C)
Distance from Earth 2,766.63 light-years
Earth Similarity Index 0.368
Travel time at Voyager 1 speed 48,789,541 years

7 siblings around KOI-351

KOI-351 g shares its host star with 7 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
KOI-351 b	Super-Earth	1.31	2.27	7.008	1,062	2013
KOI-351 c	Rocky Terrestrial	1.19	1.81	8.719	987	2013
Kepler-90 i	Super-Earth	1.32	2.30	14.449	709	2017
KOI-351 d	Sub-Neptune	2.87	8.60	59.737	520	2013
KOI-351 e	Sub-Neptune	2.66	7.56	91.939	450	2013
KOI-351 f	Sub-Neptune	2.88	8.65	124.914	407	2013
KOI-351 g this	Neptune-like	7.72	15.00	210.735	342	2013
KOI-351 h	Gas Giant	11.25	203.00	331.603	294	2013

KOI-351 g Planet Profile

Physical Specs

Radius

7.72 R⊕

Radius (Jupiter)

0.689 R♃

Mass

15.00 M⊕

Mass (Jupiter)

0.047 M♃

Density

0.27 g/cm³

Surface Gravity

0.25 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.368

HZ Position Inner

Controversial No

Discovery

Year 2013

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#165of 574

top 28.6%

This planet

7.72R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-489 b 7.72 R⊕ OGLE-2012-BLG-0026L b 7.72 R⊕ MOA-2020-BLG-208L b 7.71 R⊕

Metric	Earth	KOI-351 g	Jupiter
Radius (R⊕)	1.00	7.72	11.21
Mass (M⊕)	1.00	15.00	317.83
Density (g/cm³)	5.51	0.27	1.33
Surface Gravity (g)	1.00	0.25	2.53
Insolation (S⊕)	1.00	3.39	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	15.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	22.706 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 267667295

Gaia DR2

Gaia DR2 2132193431285570304

Gaia DR3

Gaia DR3 2132193431285570304

System

KOI-351

Percentile among Neptune-like cohort

Radius 7.718 R⊕ · percentile 71 / cohort 574

Mass 15.000 M⊕ · percentile 6 / cohort 574

Orbital period 210.74 d · percentile 90 / cohort 524

Distance 848.25 pc · percentile 69 / cohort 572

ESI 0.368 · percentile 67 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

210.735 days

Semi-major axis

0.7170 AU

Eccentricity

0.029

Inclination

89.92 °

Year Length

A year here lasts approximately 210.74 Earth days (57.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.7170 AU.

Transit Fingerprint

Depth

0.380 %

Duration

12.320 h

Impact parameter b

0.015

Rp / R★

0.058748

Transit midpoint (BJD)

2,454,979.9761

Photometric dip

Transit produces a flux drop of 3,800 ppm lasting ≈ 12.32 h.

Extended Orbital Architecture

Planet / star radius ratio

0.058748

Semi-major axis / stellar radius

143.068

Impact parameter (b)

0.015

RV semi-amplitude (K)

2.279 m/s

Transit mid-time (BJD)

2,454,979.9761

Long. of periastron (ω)

114.60°

Angular separation (arcsec)

0.84500

Eq. Temperature

342K

(69 °C)

Insolation (S⊕)

3.39

Earth = 1.00

Earth Similarity (ESI)

0.368

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Cabrera et al. 2014

Instrument

Kepler CCD Array

Publication

2014-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2013 at Kepler (12 shown).

Kepler-69 c · Super-Earth Kepler-61 b · Sub-Neptune Kepler-62 e · Super-Earth KOI-351 f · Sub-Neptune Kepler-62 f · Super-Earth KOI-351 e · Sub-Neptune Kepler-1704 b · Gas Giant Kepler-37 d · Sub-Neptune Kepler-282 e · Sub-Neptune KOI-351 h · Gas Giant KOI-351 d · Sub-Neptune Kepler-114 c · Super-Earth

Host System: KOI-351

Spectral Class

F-type yellow-white

Effective Temperature

6,031 K — hotter than the Sun (5,778 K)

Estimated Age

0.53 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.185 R☉

Stellar Mass

1.242 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.270 dex

Stellar density

1.189 g/cm³

Rotational v·sin i

4.60 km/s

Metallicity ratio

[M/H]

Distance

848.25 parsec

Light-years 2,766.63 ly

V-band magnitude

13.88 mag

Voyager-speed travel 48,789,541 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.150 mas

Total Proper Motion

5.432 mas/yr

PM Right Ascension

-4.38 mas/yr

PM Declination

-3.21 mas/yr

Galactic Cartesian (pc)

x = 0.163 · y = -0.631 · z = 0.758

Equatorial (J2000)

RA 284.43346° · Dec 49.30512°

Galactic ℓ, b

79.269° · 19.256°

Ecliptic λ, β

300.329° · 71.228°

HTM-20 index

-419849693