Key parameters at a glance

A radius of 1.54 Earth radii
A mass of 2.99 Earth masses
Surface gravity around 1.26 g
An orbital period of 11.477 days
Semi-major axis 0.0976 AU
Equilibrium temperature 796 K (523 °C)
Distance from Earth 3,272.19 light-years
Earth Similarity Index 0.377
Travel time at Voyager 1 speed 57,705,115 years

Kepler-1287 b Planet Profile

Physical Specs

Radius

1.54 R⊕

Radius (Jupiter)

0.137 R♃

Mass

2.99 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.50 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.377

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

#670of 1176

top 56.9%

This planet

1.54R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-337 b 1.54 R⊕ Kepler-274 b 1.54 R⊕ TOI-512 b 1.54 R⊕

Metric	Earth	Kepler-1287 b	Jupiter
Radius (R⊕)	1.00	1.54	11.21
Mass (M⊕)	1.00	2.99	317.83
Density (g/cm³)	5.51	4.50	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	78.16	0.037

Star Catalogue Identifiers

TIC

TIC 158985675

Gaia DR2

Gaia DR2 2127802188005355648

Gaia DR3

Gaia DR3 2127802188005355648

System

Kepler-1287

Percentile among Super-Earth cohort

Radius 1.540 R⊕ · percentile 42 / cohort 1176

Mass 2.990 M⊕ · percentile 38 / cohort 1176

Orbital period 11.48 d · percentile 68 / cohort 1164

Distance 1,003.26 pc · percentile 81 / cohort 1171

ESI 0.377 · percentile 56 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

11.477 days

Semi-major axis

0.0976 AU

Eccentricity

0.000

Inclination

89.87 °

Year Length

A year here lasts approximately 11.48 Earth days (3.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0976 AU.

Transit Fingerprint

Depth

0.024 %

Duration

2.702 h

Impact parameter b

0.201

Rp / R★

0.014544

Transit midpoint (BJD)

2,454,972.6299

Photometric dip

Transit produces a flux drop of 241 ppm lasting ≈ 2.70 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014544

Semi-major axis / stellar radius

32.190

Impact parameter (b)

0.201

Transit mid-time (BJD)

2,454,972.6299

Angular separation (arcsec)

0.09730

Eq. Temperature

796K

(523 °C)

Insolation (S⊕)

78.16

Earth = 1.00

Earth Similarity (ESI)

0.377

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-1287

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,715 K — cooler than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.940 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.05

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

4.790 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,003.26 parsec

Light-years 3,272.19 ly

V-band magnitude

15.22 mag

Voyager-speed travel 57,705,115 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.968 mas

Total Proper Motion

1.109 mas/yr

PM Right Ascension

-0.62 mas/yr

PM Declination

0.92 mas/yr

Galactic Cartesian (pc)

x = 0.223 · y = -0.644 · z = 0.732

Equatorial (J2000)

RA 289.13463° · Dec 47.06302°

Galactic ℓ, b

78.285° · 15.519°

Ecliptic λ, β

306.726° · 68.077°

HTM-20 index

1835217345