Key parameters at a glance

A radius of 1.61 Earth radii
A mass of 3.22 Earth masses
Surface gravity around 1.24 g
An orbital period of 8.105 days
Semi-major axis 0.0805 AU
Equilibrium temperature 959 K (686 °C)
Distance from Earth 6,566.40 light-years
Earth Similarity Index 0.306
Travel time at Voyager 1 speed 115,798,473 years

Kepler-1555 b Planet Profile

Physical Specs

Radius

1.61 R⊕

Radius (Jupiter)

0.144 R♃

Mass

3.22 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.24 g/cm³

Surface Gravity

1.24 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.306

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

#550of 1176

top 46.7%

This planet

1.61R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-62 e 1.61 R⊕ Kepler-149 c 1.61 R⊕ Kepler-140 b 1.61 R⊕

Metric	Earth	Kepler-1555 b	Jupiter
Radius (R⊕)	1.00	1.61	11.21
Mass (M⊕)	1.00	3.22	317.83
Density (g/cm³)	5.51	4.24	1.33
Surface Gravity (g)	1.00	1.24	2.53
Insolation (S⊕)	1.00	483.26	0.037

Star Catalogue Identifiers

TIC

TIC 158492133

Gaia DR2

Gaia DR2 2130236678547566976

Gaia DR3

Gaia DR3 2130236678547566976

System

Kepler-1555

Percentile among Super-Earth cohort

Radius 1.610 R⊕ · percentile 52 / cohort 1176

Mass 3.220 M⊕ · percentile 47 / cohort 1176

Orbital period 8.11 d · percentile 57 / cohort 1164

Distance 2,013.27 pc · percentile 98 / cohort 1171

ESI 0.306 · percentile 38 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.105 days

Semi-major axis

0.0805 AU

Eccentricity

0.000

Inclination

88.47 °

Year Length

A year here lasts approximately 8.11 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0805 AU.

Transit Fingerprint

Depth

0.021 %

Duration

4.443 h

Impact parameter b

0.276

Rp / R★

0.014083

Transit midpoint (BJD)

2,454,968.8852

Photometric dip

Transit produces a flux drop of 210 ppm lasting ≈ 4.44 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014083

Semi-major axis / stellar radius

13.610

Impact parameter (b)

0.276

Transit mid-time (BJD)

2,454,968.8852

Angular separation (arcsec)

0.04000

Eq. Temperature

959K

(686 °C)

Insolation (S⊕)

483.26

Earth = 1.00

Earth Similarity (ESI)

0.306

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-1555

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,866 K — hotter than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.060 R☉

Stellar Mass

1.040 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

0.727 g/cm³

Metallicity ratio

[Fe/H]

Distance

2,013.27 parsec

Light-years 6,566.40 ly

V-band magnitude

15.43 mag

Voyager-speed travel 115,798,473 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.467 mas

Total Proper Motion

6.960 mas/yr

PM Right Ascension

-3.11 mas/yr

PM Declination

-6.23 mas/yr

Galactic Cartesian (pc)

x = 0.212 · y = -0.665 · z = 0.716

Equatorial (J2000)

RA 287.63546° · Dec 45.71603°

Galactic ℓ, b

76.577° · 15.944°

Ecliptic λ, β

302.996° · 67.146°

HTM-20 index

-2078596682