Key parameters at a glance

A radius of 3.19 Earth radii
A mass of 10.30 Earth masses
Surface gravity around 1.01 g
An orbital period of 115.686 days
Semi-major axis 0.4684 AU
Equilibrium temperature 401 K (128 °C)
Distance from Earth 6,052.48 light-years
Earth Similarity Index 0.543
Travel time at Voyager 1 speed 106,735,424 years

Kepler-1294 b Planet Profile

Physical Specs

Radius

3.19 R⊕

Radius (Jupiter)

0.285 R♃

Mass

10.30 M⊕

Mass (Jupiter)

0.032 M♃

Density

1.74 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.543

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

#358of 1978

top 18.0%

This planet

3.19R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-188 c 3.19 R⊕ Kepler-1634 b 3.19 R⊕ Kepler-351 c 3.19 R⊕

Metric	Earth	Kepler-1294 b	Jupiter
Radius (R⊕)	1.00	3.19	11.21
Mass (M⊕)	1.00	10.30	317.83
Density (g/cm³)	5.51	1.74	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	12.36	0.037

Star Catalogue Identifiers

TIC

TIC 159721015

Gaia DR2

Gaia DR2 2126234215705936640

Gaia DR3

Gaia DR3 2126234215705936640

System

Kepler-1294

Percentile among Sub-Neptune cohort

Radius 3.190 R⊕ · percentile 82 / cohort 1978

Mass 10.300 M⊕ · percentile 75 / cohort 1978

Orbital period 115.69 d · percentile 95 / cohort 1946

Distance 1,855.70 pc · percentile 97 / cohort 1975

ESI 0.543 · percentile 76 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

115.686 days

Semi-major axis

0.4684 AU

Eccentricity

0.000

Inclination

89.93 °

Year Length

A year here lasts approximately 115.69 Earth days (31.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4684 AU.

Transit Fingerprint

Depth

0.095 %

Duration

4.625 h

Impact parameter b

0.264

Rp / R★

0.029817

Transit midpoint (BJD)

2,455,079.9877

Photometric dip

Transit produces a flux drop of 946 ppm lasting ≈ 4.63 h.

Extended Orbital Architecture

Planet / star radius ratio

0.029817

Semi-major axis / stellar radius

190.600

Impact parameter (b)

0.264

Transit mid-time (BJD)

2,455,079.9877

Angular separation (arcsec)

0.25200

Eq. Temperature

401K

(128 °C)

Insolation (S⊕)

12.36

Earth = 1.00

Earth Similarity (ESI)

0.543

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-1294

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,776 K — cooler than the Sun (5,778 K)

Estimated Age

3.98 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.970 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

9.727 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,855.70 parsec

Light-years 6,052.48 ly

V-band magnitude

15.36 mag

Voyager-speed travel 106,735,424 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.510 mas

Total Proper Motion

4.894 mas/yr

PM Right Ascension

2.79 mas/yr

PM Declination

-4.02 mas/yr

Galactic Cartesian (pc)

x = 0.259 · y = -0.665 · z = 0.701

Equatorial (J2000)

RA 291.26810° · Dec 44.48816°

Galactic ℓ, b

76.497° · 13.102°

Ecliptic λ, β

307.997° · 65.146°

HTM-20 index

781372189