Key parameters at a glance

A radius of 1.48 Earth radii
A mass of 3.51 Earth masses
Surface gravity around 1.60 g
An orbital period of 2.587 days
Semi-major axis 0.0356 AU
Equilibrium temperature 1,328 K (1055 °C)
Distance from Earth 1,307.58 light-years
Earth Similarity Index 0.220
Travel time at Voyager 1 speed 23,059,211 years

1 sibling around Kepler-97

Kepler-97 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-97 b this	Super-Earth	1.48	3.51	2.587	1,328	2014
Kepler-97 c	Unclassified	—	344.00	789.000	—	2014

Kepler-97 b Planet Profile

Physical Specs

Radius

1.48 R⊕

Radius (Jupiter)

0.132 R♃

Mass

3.51 M⊕

Mass (Jupiter)

0.011 M♃

Density

5.44 g/cm³

Surface Gravity

1.60 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.220

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

#784of 1176

top 66.6%

This planet

1.48R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-123 c 1.48 R⊕ Kepler-1275 b 1.48 R⊕ Kepler-208 e 1.48 R⊕

Metric	Earth	Kepler-97 b	Jupiter
Radius (R⊕)	1.00	1.48	11.21
Mass (M⊕)	1.00	3.51	317.83
Density (g/cm³)	5.51	5.44	1.33
Surface Gravity (g)	1.00	1.60	2.53
Insolation (S⊕)	1.00	767.96	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3.510 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	3.407 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 399951991

Gaia DR2

Gaia DR2 2131216137248338304

Gaia DR3

Gaia DR3 2131216137248338304

System

Kepler-97

Percentile among Super-Earth cohort

Radius 1.480 R⊕ · percentile 32 / cohort 1176

Mass 3.510 M⊕ · percentile 59 / cohort 1176

Orbital period 2.59 d · percentile 17 / cohort 1164

Distance 400.91 pc · percentile 40 / cohort 1171

ESI 0.220 · percentile 17 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.587 days

Semi-major axis

0.0356 AU

Eccentricity

0.000

Inclination

87.61 °

Year Length

A year here lasts approximately 2.59 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0356 AU.

Transit Fingerprint

Depth

0.022 %

Duration

2.253 h

Impact parameter b

0.410

Rp / R★

0.013803

Transit midpoint (BJD)

2,455,004.8412

Photometric dip

Transit produces a flux drop of 224 ppm lasting ≈ 2.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013803

Semi-major axis / stellar radius

5.200

Impact parameter (b)

0.410

RV semi-amplitude (K)

1.650 m/s

Transit mid-time (BJD)

2,455,004.8412

Angular separation (arcsec)

0.08890

Eq. Temperature

1,328K

(1055 °C)

Insolation (S⊕)

767.96

Earth = 1.00

Earth Similarity (ESI)

0.220

0 = alien, 1 = Earth-identical

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

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Marcy et al. 2014

Instrument

Kepler CCD Array

Publication

2014-02

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-97

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,779 K — hotter than the Sun (5,778 K)

Estimated Age

8.42 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.980 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

1.530 g/cm³

Systemic radial velocity

3.14 km/s

Rotational v·sin i

0.50 km/s

Metallicity ratio

[Fe/H]

Distance

400.91 parsec

Light-years 1,307.58 ly

V-band magnitude

12.99 mag

Voyager-speed travel 23,059,211 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.466 mas

Total Proper Motion

24.825 mas/yr

PM Right Ascension

-13.17 mas/yr

PM Declination

-21.04 mas/yr

Galactic Cartesian (pc)

x = 0.197 · y = -0.630 · z = 0.751

Equatorial (J2000)

RA 287.32653° · Dec 48.67334°

Galactic ℓ, b

79.351° · 17.257°

Ecliptic λ, β

305.112° · 70.008°

HTM-20 index

-703157730