Key parameters at a glance

A radius of 6.56 Earth radii
A mass of 35.00 Earth masses
Surface gravity around 0.81 g
An orbital period of 54.320 days
Semi-major axis 0.3046 AU
Equilibrium temperature 584 K (311 °C)
Distance from Earth 1,555.93 light-years
Earth Similarity Index 0.275
Travel time at Voyager 1 speed 27,438,890 years

3 siblings around KOI-94

KOI-94 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
KOI-94 b	Super-Earth	1.71	10.50	3.743	1,486	2013
KOI-94 c	Neptune-like	4.32	15.60	10.424	1,012	2013
KOI-94 d	Gas Giant	11.27	106.00	22.343	806	2013
KOI-94 e this	Neptune-like	6.56	35.00	54.320	584	2013

KOI-94 e Planet Profile

Physical Specs

Radius

6.56 R⊕

Radius (Jupiter)

0.585 R♃

Mass

35.00 M⊕

Mass (Jupiter)

0.110 M♃

Density

0.60 g/cm³

Surface Gravity

0.81 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.275

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

#233of 574

top 40.4%

This planet

6.56R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

OGLE-2012-BLG-0950L b 6.56 R⊕ KMT-2021-BLG-0192L b 6.56 R⊕ Kepler-297 c 6.54 R⊕

Metric	Earth	KOI-94 e	Jupiter
Radius (R⊕)	1.00	6.56	11.21
Mass (M⊕)	1.00	35.00	317.83
Density (g/cm³)	5.51	0.60	1.33
Surface Gravity (g)	1.00	0.81	2.53
Insolation (S⊕)	1.00	29.70	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	35.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	8.094 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 273231214

Gaia DR2

Gaia DR2 2076970047474270208

Gaia DR3

Gaia DR3 2076970047474270208

System

KOI-94

Percentile among Neptune-like cohort

Radius 6.560 R⊕ · percentile 59 / cohort 574

Mass 35.000 M⊕ · percentile 57 / cohort 574

Orbital period 54.32 d · percentile 72 / cohort 524

Distance 477.05 pc · percentile 55 / cohort 572

ESI 0.275 · percentile 44 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

54.320 days

Semi-major axis

0.3046 AU

Eccentricity

0.019

Inclination

89.76 °

Year Length

A year here lasts approximately 54.32 Earth days (14.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3046 AU.

Transit Fingerprint

Depth

0.200 %

Duration

8.465 h

Impact parameter b

0.180

Rp / R★

0.039600

Transit midpoint (BJD)

2,454,994.2379

Photometric dip

Transit produces a flux drop of 1,996 ppm lasting ≈ 8.47 h.

Extended Orbital Architecture

Planet / star radius ratio

0.039600

Semi-major axis / stellar radius

43.100

Impact parameter (b)

0.180

RV semi-amplitude (K)

4.500 m/s

Transit mid-time (BJD)

2,454,994.2379

Angular separation (arcsec)

0.63900

Eq. Temperature

584K

(311 °C)

Insolation (S⊕)

29.70

Earth = 1.00

Earth Similarity (ESI)

0.275

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

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

Radial velocity

Stellar wobble has been measured spectroscopically.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Weiss et al. 2013

Instrument

Kepler CCD Array

Publication

2013-05

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-94

Spectral Class

F-type yellow-white

Effective Temperature

6,182 K — hotter than the Sun (5,778 K)

Estimated Age

3.16 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.520 R☉

Stellar Mass

1.277 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.181 dex

Stellar density

0.771 g/cm³

Rotational v·sin i

7.30 km/s

Metallicity ratio

[Fe/H]

Distance

477.05 parsec

Light-years 1,555.93 ly

V-band magnitude

12.31 mag

Voyager-speed travel 27,438,890 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.068 mas

Total Proper Motion

2.394 mas/yr

PM Right Ascension

1.97 mas/yr

PM Declination

1.36 mas/yr

Galactic Cartesian (pc)

x = 0.342 · y = -0.661 · z = 0.668

Equatorial (J2000)

RA 297.33307° · Dec 41.89112°

Galactic ℓ, b

76.226° · 7.983°

Ecliptic λ, β

315.053° · 61.124°

HTM-20 index

-847074365