Key parameters at a glance

A radius of 3.10 Earth radii
A mass of 56.20 Earth masses
Surface gravity around 5.85 g
An orbital period of 44.347 days
Semi-major axis 0.2333 AU
Equilibrium temperature 484 K (211 °C)
Distance from Earth 4,362.70 light-years
Earth Similarity Index 0.459
Travel time at Voyager 1 speed 76,936,127 years

3 siblings around Kepler-282

Kepler-282 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
Kepler-282 b	Rocky Terrestrial	1.01	1.01	9.221	817	2014
Kepler-282 c	Rocky Terrestrial	1.20	1.87	13.639	717	2014
Kepler-282 d	Sub-Neptune	2.46	61.00	24.806	588	2013
Kepler-282 e this	Sub-Neptune	3.10	56.20	44.347	484	2013

Kepler-282 e Planet Profile

Physical Specs

Radius

3.10 R⊕

Radius (Jupiter)

0.277 R♃

Mass

56.20 M⊕

Mass (Jupiter)

0.177 M♃

Density

10.40 g/cm³

Surface Gravity

5.85 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.459

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

#433of 1978

top 21.8%

This planet

3.10R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1062 c 3.10 R⊕ Kepler-209 c 3.10 R⊕ Kepler-104 b 3.10 R⊕

Metric	Earth	Kepler-282 e	Jupiter
Radius (R⊕)	1.00	3.10	11.21
Mass (M⊕)	1.00	56.20	317.83
Density (g/cm³)	5.51	10.40	1.33
Surface Gravity (g)	1.00	5.85	2.53
Insolation (S⊕)	1.00	24.11	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	56.200 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 164779321

Gaia DR2

Gaia DR2 2106739943262307200

Gaia DR3

Gaia DR3 2106739943262307200

System

Kepler-282

Percentile among Sub-Neptune cohort

Radius 3.100 R⊕ · percentile 78 / cohort 1978

Mass 56.200 M⊕ · percentile 98 / cohort 1978

Orbital period 44.35 d · percentile 83 / cohort 1946

Distance 1,337.61 pc · percentile 89 / cohort 1975

ESI 0.459 · percentile 64 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

44.347 days

Semi-major axis

0.2333 AU

Eccentricity

0.000

Inclination

89.70 °

Year Length

A year here lasts approximately 44.35 Earth days (12.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2333 AU.

Transit Fingerprint

Depth

0.079 %

Duration

6.399 h

Impact parameter b

0.778

Rp / R★

0.026731

Transit midpoint (BJD)

2,454,994.3143

Photometric dip

Transit produces a flux drop of 792 ppm lasting ≈ 6.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026731

Semi-major axis / stellar radius

54.150

Impact parameter (b)

0.778

Transit mid-time (BJD)

2,454,994.3143

Angular separation (arcsec)

0.17400

Eq. Temperature

484K

(211 °C)

Insolation (S⊕)

24.11

Earth = 1.00

Earth Similarity (ESI)

0.459

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.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Xie 2014

Instrument

Kepler CCD Array

Publication

2014-02

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 KOI-351 h · Gas Giant KOI-351 d · Sub-Neptune Kepler-114 c · Super-Earth Kepler-396 b · Sub-Neptune

Host System: Kepler-282

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,656 K — cooler than the Sun (5,778 K)

Estimated Age

12.88 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.890 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

0.640 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,337.61 parsec

Light-years 4,362.70 ly

V-band magnitude

15.44 mag

Voyager-speed travel 76,936,127 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.719 mas

Total Proper Motion

8.884 mas/yr

PM Right Ascension

-6.56 mas/yr

PM Declination

-5.99 mas/yr

Galactic Cartesian (pc)

x = 0.180 · y = -0.686 · z = 0.705

Equatorial (J2000)

RA 284.67724° · Dec 44.79764°

Galactic ℓ, b

74.876° · 17.533°

Ecliptic λ, β

297.217° · 66.855°

HTM-20 index

965524275