Key parameters at a glance

A radius of 1.48 Earth radii
A mass of 2.79 Earth masses
Surface gravity around 1.27 g
An orbital period of 3.657 days
Semi-major axis 0.0488 AU
Equilibrium temperature 1,368 K (1095 °C)
Distance from Earth 3,763.78 light-years
Earth Similarity Index 0.211
Travel time at Voyager 1 speed 66,374,169 years

Kepler-1275 b Planet Profile

Physical Specs

Radius

1.48 R⊕

Radius (Jupiter)

0.132 R♃

Mass

2.79 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.73 g/cm³

Surface Gravity

1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.211

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

#784of 1176

top 66.6%

This planet

1.48R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-123 c 1.48 R⊕ Kepler-218 b 1.48 R⊕ Kepler-208 e 1.48 R⊕

Metric	Earth	Kepler-1275 b	Jupiter
Radius (R⊕)	1.00	1.48	11.21
Mass (M⊕)	1.00	2.79	317.83
Density (g/cm³)	5.51	4.73	1.33
Surface Gravity (g)	1.00	1.27	2.53
Insolation (S⊕)	1.00	822.48	0.037

Star Catalogue Identifiers

TIC

TIC 270521167

Gaia DR2

Gaia DR2 2126457313486865792

Gaia DR3

Gaia DR3 2126457313486865792

System

Kepler-1275

Percentile among Super-Earth cohort

Radius 1.480 R⊕ · percentile 32 / cohort 1176

Mass 2.790 M⊕ · percentile 30 / cohort 1176

Orbital period 3.66 d · percentile 27 / cohort 1164

Distance 1,153.98 pc · percentile 88 / cohort 1171

ESI 0.211 · percentile 15 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

3.657 days

Semi-major axis

0.0488 AU

Eccentricity

0.000

Inclination

89.07 °

Year Length

A year here lasts approximately 3.66 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0488 AU.

Transit Fingerprint

Depth

0.012 %

Duration

2.114 h

Impact parameter b

0.217

Rp / R★

0.010030

Transit midpoint (BJD)

2,454,967.9540

Photometric dip

Transit produces a flux drop of 118 ppm lasting ≈ 2.11 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010030

Semi-major axis / stellar radius

13.350

Impact parameter (b)

0.217

Transit mid-time (BJD)

2,454,967.9540

Angular separation (arcsec)

0.04230

Eq. Temperature

1,368K

(1095 °C)

Insolation (S⊕)

822.48

Earth = 1.00

Earth Similarity (ESI)

0.211

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1275

Spectral Class

F-type yellow-white

Effective Temperature

6,296 K — hotter than the Sun (5,778 K)

Estimated Age

2.51 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.360 R☉

Stellar Mass

1.230 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.260 dex

Stellar density

3.174 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,153.98 parsec

Light-years 3,763.78 ly

V-band magnitude

14.60 mag

Voyager-speed travel 66,374,169 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.838 mas

Total Proper Motion

1.692 mas/yr

PM Right Ascension

-1.63 mas/yr

PM Declination

-0.45 mas/yr

Galactic Cartesian (pc)

x = 0.282 · y = -0.649 · z = 0.706

Equatorial (J2000)

RA 293.50050° · Dec 44.93245°

Galactic ℓ, b

77.618° · 11.871°

Ecliptic λ, β

311.888° · 64.990°

HTM-20 index

-1653294525