Key parameters at a glance

A radius of 1.87 Earth radii
A mass of 4.16 Earth masses
Surface gravity around 1.19 g
An orbital period of 66.558 days
Semi-major axis 0.3398 AU
Equilibrium temperature 757 K (484 °C)
Distance from Earth 4,848.96 light-years
Earth Similarity Index 0.372
Travel time at Voyager 1 speed 85,511,427 years

Kepler-1280 b Planet Profile

Physical Specs

Radius

1.87 R⊕

Radius (Jupiter)

0.167 R♃

Mass

4.16 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.50 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.372

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

#169of 1176

top 14.3%

This planet

1.87R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

HD 23472 c 1.87 R⊕ Kepler-299 e 1.87 R⊕ EPIC 201238110 b 1.87 R⊕

Metric	Earth	Kepler-1280 b	Jupiter
Radius (R⊕)	1.00	1.87	11.21
Mass (M⊕)	1.00	4.16	317.83
Density (g/cm³)	5.51	3.50	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	35.29	0.037

Star Catalogue Identifiers

TIC

TIC 270616541

Gaia DR2

Gaia DR2 2127973677460755584

Gaia DR3

Gaia DR3 2127973677460755584

System

Kepler-1280

Percentile among Super-Earth cohort

Radius 1.870 R⊕ · percentile 85 / cohort 1176

Mass 4.160 M⊕ · percentile 79 / cohort 1176

Orbital period 66.56 d · percentile 97 / cohort 1164

Distance 1,486.70 pc · percentile 95 / cohort 1171

ESI 0.372 · percentile 55 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

66.558 days

Semi-major axis

0.3398 AU

Eccentricity

0.000

Inclination

89.69 °

Year Length

A year here lasts approximately 66.56 Earth days (18.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3398 AU.

Transit Fingerprint

Depth

0.021 %

Duration

10.399 h

Impact parameter b

0.276

Rp / R★

0.013379

Transit midpoint (BJD)

2,455,014.3237

Photometric dip

Transit produces a flux drop of 214 ppm lasting ≈ 10.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013379

Semi-major axis / stellar radius

47.370

Impact parameter (b)

0.276

Transit mid-time (BJD)

2,455,014.3237

Angular separation (arcsec)

0.22900

Eq. Temperature

757K

(484 °C)

Insolation (S⊕)

35.29

Earth = 1.00

Earth Similarity (ESI)

0.372

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-1280

Spectral Class

F-type yellow-white

Effective Temperature

6,227 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.320 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.280 dex

Stellar density

0.170 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,486.70 parsec

Light-years 4,848.96 ly

V-band magnitude

14.20 mag

Voyager-speed travel 85,511,427 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.644 mas

Total Proper Motion

7.758 mas/yr

PM Right Ascension

0.19 mas/yr

PM Declination

-7.76 mas/yr

Galactic Cartesian (pc)

x = 0.281 · y = -0.644 · z = 0.712

Equatorial (J2000)

RA 293.57389° · Dec 45.38449°

Galactic ℓ, b

78.055° · 12.027°

Ecliptic λ, β

312.410° · 65.389°

HTM-20 index

-1375079365