Key parameters at a glance

A radius of 1.78 Earth radii
A mass of 3.82 Earth masses
Surface gravity around 1.21 g
An orbital period of 4.444 days
Semi-major axis 0.0552 AU
Equilibrium temperature 1,217 K (944 °C)
Distance from Earth 4,485.23 light-years
Earth Similarity Index 0.227
Travel time at Voyager 1 speed 79,097,063 years

Kepler-881 b Planet Profile

Physical Specs

Radius

1.78 R⊕

Radius (Jupiter)

0.159 R♃

Mass

3.82 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.72 g/cm³

Surface Gravity

1.21 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.227

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

#282of 1176

top 23.9%

This planet

1.78R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1544 b 1.78 R⊕ Kepler-1003 b 1.78 R⊕ GJ 676 A d 1.78 R⊕

Metric	Earth	Kepler-881 b	Jupiter
Radius (R⊕)	1.00	1.78	11.21
Mass (M⊕)	1.00	3.82	317.83
Density (g/cm³)	5.51	3.72	1.33
Surface Gravity (g)	1.00	1.21	2.53
Insolation (S⊕)	1.00	538.57	0.037

Star Catalogue Identifiers

TIC

TIC 158936201

Gaia DR2

Gaia DR2 2127766969273092864

Gaia DR3

Gaia DR3 2127766969273092864

System

Kepler-881

Percentile among Super-Earth cohort

Radius 1.780 R⊕ · percentile 75 / cohort 1176

Mass 3.820 M⊕ · percentile 69 / cohort 1176

Orbital period 4.44 d · percentile 36 / cohort 1164

Distance 1,375.18 pc · percentile 93 / cohort 1171

ESI 0.227 · percentile 18 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.444 days

Semi-major axis

0.0552 AU

Eccentricity

0.000

Inclination

74.94 °

Year Length

A year here lasts approximately 4.44 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0552 AU.

Transit Fingerprint

Depth

0.016 %

Duration

3.350 h

Impact parameter b

0.885

Rp / R★

0.014604

Transit midpoint (BJD)

2,454,966.4626

Photometric dip

Transit produces a flux drop of 163 ppm lasting ≈ 3.35 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014604

Semi-major axis / stellar radius

3.620

Impact parameter (b)

0.885

Transit mid-time (BJD)

2,454,966.4626

Angular separation (arcsec)

0.04010

Eq. Temperature

1,217K

(944 °C)

Insolation (S⊕)

538.57

Earth = 1.00

Earth Similarity (ESI)

0.227

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-881

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,961 K — hotter than the Sun (5,778 K)

Estimated Age

3.80 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

0.046 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,375.18 parsec

Light-years 4,485.23 ly

V-band magnitude

15.28 mag

Voyager-speed travel 79,097,063 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.699 mas

Total Proper Motion

19.209 mas/yr

PM Right Ascension

-4.06 mas/yr

PM Declination

-18.77 mas/yr

Galactic Cartesian (pc)

x = 0.223 · y = -0.649 · z = 0.727

Equatorial (J2000)

RA 288.99255° · Dec 46.67065°

Galactic ℓ, b

77.871° · 15.453°

Ecliptic λ, β

306.123° · 67.742°

HTM-20 index

1875321974