Key parameters at a glance

A radius of 3.35 Earth radii
A mass of 11.20 Earth masses
Surface gravity around 1.00 g
An orbital period of 35.622 days
Semi-major axis 0.2101 AU
Equilibrium temperature 523 K (250 °C)
Distance from Earth 3,453.08 light-years
Earth Similarity Index 0.424
Travel time at Voyager 1 speed 60,895,041 years

Kepler-1451 b Planet Profile

Physical Specs

Radius

3.35 R⊕

Radius (Jupiter)

0.299 R♃

Mass

11.20 M⊕

Mass (Jupiter)

0.035 M♃

Density

1.64 g/cm³

Surface Gravity

1.00 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.424

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

#250of 1978

top 12.6%

This planet

3.35R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-609 b 3.35 R⊕ HD 103949 b 3.35 R⊕ HD 13808 b 3.35 R⊕

Metric	Earth	Kepler-1451 b	Jupiter
Radius (R⊕)	1.00	3.35	11.21
Mass (M⊕)	1.00	11.20	317.83
Density (g/cm³)	5.51	1.64	1.33
Surface Gravity (g)	1.00	1.00	2.53
Insolation (S⊕)	1.00	18.75	0.037

Star Catalogue Identifiers

TIC

TIC 138217479

Gaia DR2

Gaia DR2 2053286429569716992

Gaia DR3

Gaia DR3 2053286429569716992

System

Kepler-1451

Percentile among Sub-Neptune cohort

Radius 3.350 R⊕ · percentile 87 / cohort 1978

Mass 11.200 M⊕ · percentile 81 / cohort 1978

Orbital period 35.62 d · percentile 78 / cohort 1946

Distance 1,058.72 pc · percentile 82 / cohort 1975

ESI 0.424 · percentile 57 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

35.622 days

Semi-major axis

0.2101 AU

Eccentricity

0.000

Inclination

89.73 °

Year Length

A year here lasts approximately 35.62 Earth days (9.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2101 AU.

Transit Fingerprint

Depth

0.078 %

Duration

5.146 h

Impact parameter b

0.261

Rp / R★

0.030539

Transit midpoint (BJD)

2,454,974.4579

Photometric dip

Transit produces a flux drop of 779 ppm lasting ≈ 5.15 h.

Extended Orbital Architecture

Planet / star radius ratio

0.030539

Semi-major axis / stellar radius

26.300

Impact parameter (b)

0.261

Transit mid-time (BJD)

2,454,974.4579

Angular separation (arcsec)

0.19800

Eq. Temperature

523K

(250 °C)

Insolation (S⊕)

18.75

Earth = 1.00

Earth Similarity (ESI)

0.424

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-1451

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,782 K — hotter than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.990 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

2.561 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,058.72 parsec

Light-years 3,453.08 ly

V-band magnitude

15.31 mag

Voyager-speed travel 60,895,041 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.917 mas

Total Proper Motion

6.014 mas/yr

PM Right Ascension

-0.90 mas/yr

PM Declination

-5.95 mas/yr

Galactic Cartesian (pc)

x = 0.303 · y = -0.699 · z = 0.648

Equatorial (J2000)

RA 293.44642° · Dec 40.40988°

Galactic ℓ, b

73.497° · 9.851°

Ecliptic λ, β

308.337° · 60.766°

HTM-20 index

2134491332