Key parameters at a glance

A radius of 2.50 Earth radii
A mass of 6.80 Earth masses
Surface gravity around 1.09 g
An orbital period of 10.061 days
Semi-major axis 0.0893 AU
Equilibrium temperature 899 K (626 °C)
Distance from Earth 2,654.01 light-years
Earth Similarity Index 0.280
Travel time at Voyager 1 speed 46,803,458 years

Kepler-481 b Planet Profile

Physical Specs

Radius

2.50 R⊕

Radius (Jupiter)

0.223 R♃

Mass

6.80 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.39 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.280

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

#1168of 1978

top 59.0%

This planet

2.50R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-126 d 2.50 R⊕ Kepler-254 d 2.50 R⊕ GJ 163 c 2.50 R⊕

Metric	Earth	Kepler-481 b	Jupiter
Radius (R⊕)	1.00	2.50	11.21
Mass (M⊕)	1.00	6.80	317.83
Density (g/cm³)	5.51	2.39	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	183.84	0.037

Star Catalogue Identifiers

TIC

TIC 26541093

Gaia DR2

Gaia DR2 2129753580626548736

Gaia DR3

Gaia DR3 2129753580626548736

System

Kepler-481

Percentile among Sub-Neptune cohort

Radius 2.500 R⊕ · percentile 40 / cohort 1978

Mass 6.800 M⊕ · percentile 37 / cohort 1978

Orbital period 10.06 d · percentile 34 / cohort 1946

Distance 813.72 pc · percentile 66 / cohort 1975

ESI 0.280 · percentile 23 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.061 days

Semi-major axis

0.0893 AU

Eccentricity

0.000

Inclination

87.02 °

Year Length

A year here lasts approximately 10.06 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0893 AU.

Transit Fingerprint

Depth

0.046 %

Duration

4.578 h

Impact parameter b

0.050

Rp / R★

0.020903

Transit midpoint (BJD)

2,454,971.9675

Photometric dip

Transit produces a flux drop of 460 ppm lasting ≈ 4.58 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020903

Semi-major axis / stellar radius

17.500

Impact parameter (b)

0.050

Transit mid-time (BJD)

2,454,971.9675

Angular separation (arcsec)

0.11000

Eq. Temperature

899K

(626 °C)

Insolation (S⊕)

183.84

Earth = 1.00

Earth Similarity (ESI)

0.280

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-481

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,802 K — hotter than the Sun (5,778 K)

Estimated Age

6.17 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

0.510 g/cm³

Metallicity ratio

[Fe/H]

Distance

813.72 parsec

Light-years 2,654.01 ly

V-band magnitude

14.05 mag

Voyager-speed travel 46,803,458 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.200 mas

Total Proper Motion

9.866 mas/yr

PM Right Ascension

-7.51 mas/yr

PM Declination

6.39 mas/yr

Galactic Cartesian (pc)

x = 0.243 · y = -0.605 · z = 0.758

Equatorial (J2000)

RA 291.90699° · Dec 49.26208°

Galactic ℓ, b

81.145° · 14.724°

Ecliptic λ, β

313.772° · 69.394°

HTM-20 index

715658820