Key parameters at a glance

A radius of 1.32 Earth radii
A mass of 2.30 Earth masses
Surface gravity around 1.32 g
An orbital period of 14.449 days
Semi-major axis 0.1201 AU
Equilibrium temperature 709 K (436 °C)
Distance from Earth 2,766.63 light-years
Earth Similarity Index 0.444
Travel time at Voyager 1 speed 48,789,541 years

Context from the literature

Kepler-90i (also known by its Kepler Object of Interest designation KOI-351.08) is a super-Earth exoplanet with a radius 1.32 times that of Earth, orbiting the early G-type main sequence star Kepler-90 every 14.45 days, discovered by NASA's Kepler spacecraft. It is located about 2,840 light-years (870 parsecs, or nearly 2.4078×1016 km) from Earth in the constellation Draco. The exoplanet is the eighth in the star's multiplanetary system. As of December 2017, Kepler-90 is the star hosting the most exoplanets found. Kepler-90i was found with the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured, and by a newly utilized computer tool, deep learning, a class of machine learning algorithms.

Excerpted from Wikipedia · full article

7 siblings around KOI-351

Kepler-90 i shares its host star with 7 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
KOI-351 b	Super-Earth	1.31	2.27	7.008	1,062	2013
KOI-351 c	Rocky Terrestrial	1.19	1.81	8.719	987	2013
Kepler-90 i this	Super-Earth	1.32	2.30	14.449	709	2017
KOI-351 d	Sub-Neptune	2.87	8.60	59.737	520	2013
KOI-351 e	Sub-Neptune	2.66	7.56	91.939	450	2013
KOI-351 f	Sub-Neptune	2.88	8.65	124.914	407	2013
KOI-351 g	Neptune-like	7.72	15.00	210.735	342	2013
KOI-351 h	Gas Giant	11.25	203.00	331.603	294	2013

Kepler-90 i Planet Profile

Physical Specs

Radius

1.32 R⊕

Radius (Jupiter)

0.118 R♃

Mass

2.30 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.50 g/cm³

Surface Gravity

1.32 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.444

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1049of 1176

top 89.1%

This planet

1.32R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1506 b 1.32 R⊕ Kepler-383 b 1.32 R⊕ Kepler-157 b 1.32 R⊕

Metric	Earth	Kepler-90 i	Jupiter
Radius (R⊕)	1.00	1.32	11.21
Mass (M⊕)	1.00	2.30	317.83
Density (g/cm³)	5.51	5.50	1.33
Surface Gravity (g)	1.00	1.32	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 267667295

Gaia DR2

Gaia DR2 2132193431285570304

Gaia DR3

Gaia DR3 2132193431285570304

System

KOI-351

Percentile among Super-Earth cohort

Radius 1.320 R⊕ · percentile 9 / cohort 1176

Mass 2.300 M⊕ · percentile 9 / cohort 1176

Orbital period 14.45 d · percentile 77 / cohort 1164

Distance 848.25 pc · percentile 71 / cohort 1171

ESI 0.444 · percentile 67 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

14.449 days

Semi-major axis

0.1201 AU

Eccentricity

0.000

Inclination

89.20 °

Year Length

A year here lasts approximately 14.45 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1201 AU.

Transit Fingerprint

Duration

2.800 h

Impact parameter b

0.500

Rp / R★

0.009350

Transit midpoint (BJD)

2,455,644.3488

Extended Orbital Architecture

Planet / star radius ratio

0.009350

Semi-major axis / stellar radius

33.800

Impact parameter (b)

0.500

Transit mid-time (BJD)

2,455,644.3488

Angular separation (arcsec)

0.14200

Eq. Temperature

709K

(436 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.444

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Shallue & Vanderburg 2018

Instrument

Kepler CCD Array

Publication

2018-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2017 at Kepler (8 shown).

Kepler-1649 b · Rocky Terrestrial Kepler-1652 b · Super-Earth Kepler-1653 b · Sub-Neptune Kepler-1651 b · Super-Earth Kepler-150 f · Sub-Neptune Kepler-1650 b · Rocky Terrestrial Kepler-80 g · Rocky Terrestrial Kepler-448 c · Gas Giant

Host System: KOI-351

Spectral Class

F-type yellow-white

Effective Temperature

6,015 K — hotter than the Sun (5,778 K)

Estimated Age

0.53 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.290 R☉

Stellar Mass

1.120 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.270 dex

Stellar density

1.189 g/cm³

Rotational v·sin i

4.60 km/s

Metallicity ratio

[M/H]

Distance

848.25 parsec

Light-years 2,766.63 ly

V-band magnitude

13.88 mag

Voyager-speed travel 48,789,541 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.150 mas

Total Proper Motion

5.432 mas/yr

PM Right Ascension

-4.38 mas/yr

PM Declination

-3.21 mas/yr

Galactic Cartesian (pc)

x = 0.163 · y = -0.631 · z = 0.758

Equatorial (J2000)

RA 284.43346° · Dec 49.30512°

Galactic ℓ, b

79.269° · 19.256°

Ecliptic λ, β

300.329° · 71.228°

HTM-20 index

-419849693

Wikipedia → Image: Wikimedia Commons · NASA/Ames Research Center/Wendy Stenzel · Public domain