Key parameters at a glance

A radius of 1.75 Earth radii
A mass of 3.71 Earth masses
Surface gravity around 1.21 g
An orbital period of 23.477 days
Semi-major axis 0.1785 AU
Equilibrium temperature 738 K (465 °C)
Distance from Earth 4,873.49 light-years
Earth Similarity Index 0.390
Travel time at Voyager 1 speed 85,943,959 years

Kepler-1279 b Planet Profile

Physical Specs

Radius

1.75 R⊕

Radius (Jupiter)

0.156 R♃

Mass

3.71 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.80 g/cm³

Surface Gravity

1.21 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.390

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

#326of 1176

top 27.6%

This planet

1.75R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-301 d 1.75 R⊕ Kepler-1243 b 1.75 R⊕ Kepler-122 f 1.75 R⊕

Metric	Earth	Kepler-1279 b	Jupiter
Radius (R⊕)	1.00	1.75	11.21
Mass (M⊕)	1.00	3.71	317.83
Density (g/cm³)	5.51	3.80	1.33
Surface Gravity (g)	1.00	1.21	2.53
Insolation (S⊕)	1.00	190.85	0.037

Star Catalogue Identifiers

TIC

TIC 121465371

Gaia DR2

Gaia DR2 2100559554044410624

Gaia DR3

Gaia DR3 2100559554044410624

System

Kepler-1279

Percentile among Super-Earth cohort

Radius 1.750 R⊕ · percentile 71 / cohort 1176

Mass 3.710 M⊕ · percentile 64 / cohort 1176

Orbital period 23.48 d · percentile 88 / cohort 1164

Distance 1,494.22 pc · percentile 95 / cohort 1171

ESI 0.390 · percentile 58 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

23.477 days

Semi-major axis

0.1785 AU

Eccentricity

0.000

Inclination

89.97 °

Year Length

A year here lasts approximately 23.48 Earth days (6.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1785 AU.

Transit Fingerprint

Depth

0.015 %

Duration

7.271 h

Impact parameter b

0.620

Rp / R★

0.011800

Transit midpoint (BJD)

2,454,978.3507

Photometric dip

Transit produces a flux drop of 151 ppm lasting ≈ 7.27 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011800

Semi-major axis / stellar radius

26.930

Impact parameter (b)

0.620

Transit mid-time (BJD)

2,454,978.3507

Angular separation (arcsec)

0.11900

Eq. Temperature

738K

(465 °C)

Insolation (S⊕)

190.85

Earth = 1.00

Earth Similarity (ESI)

0.390

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-1279

Spectral Class

F-type yellow-white

Effective Temperature

6,221 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.330 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.260 dex

Stellar density

0.200 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,494.22 parsec

Light-years 4,873.49 ly

V-band magnitude

14.14 mag

Voyager-speed travel 85,943,959 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.640 mas

Total Proper Motion

16.938 mas/yr

PM Right Ascension

-7.60 mas/yr

PM Declination

-15.14 mas/yr

Galactic Cartesian (pc)

x = 0.237 · y = -0.724 · z = 0.648

Equatorial (J2000)

RA 288.09559° · Dec 40.36591°

Galactic ℓ, b

71.644° · 13.500°

Ecliptic λ, β

300.182° · 61.922°

HTM-20 index

-1805482616