Key parameters at a glance

A radius of 1.96 Earth radii
A mass of 4.50 Earth masses
Surface gravity around 1.17 g
An orbital period of 5.123 days
Semi-major axis 0.0556 AU
Equilibrium temperature 994 K (721 °C)
Distance from Earth 2,747.73 light-years
Earth Similarity Index 0.275
Travel time at Voyager 1 speed 48,456,226 years

Kepler-1127 b Planet Profile

Physical Specs

Radius

1.96 R⊕

Radius (Jupiter)

0.175 R♃

Mass

4.50 M⊕

Mass (Jupiter)

0.014 M♃

Density

3.28 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.275

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

#49of 1176

top 4.1%

This planet

1.96R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-174 b 1.96 R⊕ Kepler-792 b 1.96 R⊕ Kepler-118 b 1.96 R⊕

Metric	Earth	Kepler-1127 b	Jupiter
Radius (R⊕)	1.00	1.96	11.21
Mass (M⊕)	1.00	4.50	317.83
Density (g/cm³)	5.51	3.28	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	160.77	0.037

Star Catalogue Identifiers

TIC

TIC 275569511

Gaia DR2

Gaia DR2 2077805263989929728

Gaia DR3

Gaia DR3 2077805263989929728

System

Kepler-1127

Percentile among Super-Earth cohort

Radius 1.960 R⊕ · percentile 95 / cohort 1176

Mass 4.500 M⊕ · percentile 86 / cohort 1176

Orbital period 5.12 d · percentile 41 / cohort 1164

Distance 842.46 pc · percentile 71 / cohort 1171

ESI 0.275 · percentile 30 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.123 days

Semi-major axis

0.0556 AU

Eccentricity

0.000

Inclination

88.72 °

Year Length

A year here lasts approximately 5.12 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0556 AU.

Transit Fingerprint

Depth

0.029 %

Duration

2.998 h

Impact parameter b

0.308

Rp / R★

0.019013

Transit midpoint (BJD)

2,454,965.0857

Photometric dip

Transit produces a flux drop of 286 ppm lasting ≈ 3.00 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019013

Semi-major axis / stellar radius

5.680

Impact parameter (b)

0.308

Transit mid-time (BJD)

2,454,965.0857

Angular separation (arcsec)

0.06600

Eq. Temperature

994K

(721 °C)

Insolation (S⊕)

160.77

Earth = 1.00

Earth Similarity (ESI)

0.275

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-1127

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,664 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.950 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

1.894 g/cm³

Metallicity ratio

[Fe/H]

Distance

842.46 parsec

Light-years 2,747.73 ly

V-band magnitude

15.16 mag

Voyager-speed travel 48,456,226 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.159 mas

Total Proper Motion

26.074 mas/yr

PM Right Ascension

-7.57 mas/yr

PM Declination

-24.95 mas/yr

Galactic Cartesian (pc)

x = 0.290 · y = -0.675 · z = 0.678

Equatorial (J2000)

RA 293.21736° · Dec 42.72058°

Galactic ℓ, b

75.509° · 11.057°

Ecliptic λ, β

309.636° · 63.000°

HTM-20 index

-59037432