Key parameters at a glance

A radius of 2.37 Earth radii
A mass of 6.21 Earth masses
Surface gravity around 1.11 g
An orbital period of 51.131 days
Semi-major axis 0.2705 AU
Equilibrium temperature 542 K (269 °C)
Distance from Earth 3,934.65 light-years
Earth Similarity Index 0.471
Travel time at Voyager 1 speed 69,387,516 years

Kepler-1272 b Planet Profile

Physical Specs

Radius

2.37 R⊕

Radius (Jupiter)

0.211 R♃

Mass

6.21 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.56 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.471

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

#1375of 1978

top 69.5%

This planet

2.37R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-81 c 2.37 R⊕ K2-18 b 2.37 R⊕ Kepler-125 b 2.37 R⊕

Metric	Earth	Kepler-1272 b	Jupiter
Radius (R⊕)	1.00	2.37	11.21
Mass (M⊕)	1.00	6.21	317.83
Density (g/cm³)	5.51	2.56	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	34.43	0.037

Star Catalogue Identifiers

TIC

TIC 399794186

Gaia DR2

Gaia DR2 2100148611573075200

Gaia DR3

Gaia DR3 2100148611573075200

System

Kepler-1272

Percentile among Sub-Neptune cohort

Radius 2.370 R⊕ · percentile 30 / cohort 1978

Mass 6.210 M⊕ · percentile 29 / cohort 1978

Orbital period 51.13 d · percentile 86 / cohort 1946

Distance 1,206.37 pc · percentile 87 / cohort 1975

ESI 0.471 · percentile 66 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

51.131 days

Semi-major axis

0.2705 AU

Eccentricity

0.000

Inclination

88.77 °

Year Length

A year here lasts approximately 51.13 Earth days (14.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2705 AU.

Transit Fingerprint

Depth

0.038 %

Duration

5.995 h

Impact parameter b

0.926

Rp / R★

0.019906

Transit midpoint (BJD)

2,454,970.1795

Photometric dip

Transit produces a flux drop of 382 ppm lasting ≈ 6.00 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019906

Semi-major axis / stellar radius

24.100

Impact parameter (b)

0.926

Transit mid-time (BJD)

2,454,970.1795

Angular separation (arcsec)

0.22400

Eq. Temperature

542K

(269 °C)

Insolation (S⊕)

34.43

Earth = 1.00

Earth Similarity (ESI)

0.471

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-1272

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,926 K — hotter than the Sun (5,778 K)

Estimated Age

3.89 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

0.619 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,206.37 parsec

Light-years 3,934.65 ly

V-band magnitude

14.73 mag

Voyager-speed travel 69,387,516 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

0.800 mas

Total Proper Motion

12.810 mas/yr

PM Right Ascension

-9.48 mas/yr

PM Declination

-8.61 mas/yr

Galactic Cartesian (pc)

x = 0.205 · y = -0.752 · z = 0.627

Equatorial (J2000)

RA 285.21976° · Dec 38.80584°

Galactic ℓ, b

69.252° · 14.904°

Ecliptic λ, β

294.902° · 60.936°

HTM-20 index

515536200