Key parameters at a glance

A radius of 1.29 Earth radii
A mass of 2.21 Earth masses
Surface gravity around 1.33 g
An orbital period of 1.772 days
Semi-major axis 0.0310 AU
Equilibrium temperature 1,685 K (1412 °C)
Distance from Earth 2,601.81 light-years
Earth Similarity Index 0.171
Travel time at Voyager 1 speed 45,882,946 years

1 sibling around Kepler-312

Kepler-312 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-312 b this	Super-Earth	1.29	2.21	1.772	1,685	2014
Kepler-312 c	Sub-Neptune	3.15	10.10	19.747	754	2014

Kepler-312 b Planet Profile

Physical Specs

Radius

1.29 R⊕

Radius (Jupiter)

0.115 R♃

Mass

2.21 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.66 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.171

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1100of 1176

top 93.5%

This planet

1.29R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-393 b 1.29 R⊕ Kepler-211 c 1.29 R⊕ Kepler-173 b 1.29 R⊕

Metric	Earth	Kepler-312 b	Jupiter
Radius (R⊕)	1.00	1.29	11.21
Mass (M⊕)	1.00	2.21	317.83
Density (g/cm³)	5.51	5.66	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	4,124.02	0.037

Star Catalogue Identifiers

TIC

TIC 274030824

Gaia DR2

Gaia DR2 2078450436800904448

Gaia DR3

Gaia DR3 2078450436800904448

System

Kepler-312

Percentile among Super-Earth cohort

Radius 1.290 R⊕ · percentile 6 / cohort 1176

Mass 2.210 M⊕ · percentile 6 / cohort 1176

Orbital period 1.77 d · percentile 11 / cohort 1164

Distance 797.72 pc · percentile 67 / cohort 1171

ESI 0.171 · percentile 7 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

1.772 days

Semi-major axis

0.0310 AU

Eccentricity

0.000

Inclination

89.94 °

Year Length

A year here lasts approximately 1.77 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0310 AU.

Transit Fingerprint

Depth

0.008 %

Duration

2.453 h

Impact parameter b

0.360

Rp / R★

0.008154

Transit midpoint (BJD)

2,454,965.0878

Photometric dip

Transit produces a flux drop of 79 ppm lasting ≈ 2.45 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008154

Semi-major axis / stellar radius

5.572

Impact parameter (b)

0.360

Transit mid-time (BJD)

2,454,965.0878

Angular separation (arcsec)

0.03890

Eq. Temperature

1,685K

(1412 °C)

Insolation (S⊕)

4,124.02

Earth = 1.00

Earth Similarity (ESI)

0.171

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-312

Spectral Class

F-type yellow-white

Effective Temperature

6,115 K — hotter than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.467 R☉

Stellar Mass

1.314 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.191 dex

Stellar density

0.300 g/cm³

Metallicity ratio

[Fe/H]

Distance

797.72 parsec

Light-years 2,601.81 ly

V-band magnitude

13.01 mag

Voyager-speed travel 45,882,946 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.225 mas

Total Proper Motion

4.876 mas/yr

PM Right Ascension

3.63 mas/yr

PM Declination

3.25 mas/yr

Galactic Cartesian (pc)

x = 0.351 · y = -0.649 · z = 0.675

Equatorial (J2000)

RA 298.39577° · Dec 42.45977°

Galactic ℓ, b

77.119° · 7.583°

Ecliptic λ, β

317.019° · 61.345°

HTM-20 index

-465939898