Key parameters at a glance

A radius of 2.39 Earth radii
A mass of 6.30 Earth masses
Surface gravity around 1.10 g
An orbital period of 8.047 days
Semi-major axis 0.0770 AU
Equilibrium temperature 855 K (582 °C)
Distance from Earth 4,955.13 light-years
Earth Similarity Index 0.301
Travel time at Voyager 1 speed 87,383,625 years

Kepler-897 b Planet Profile

Physical Specs

Radius

2.39 R⊕

Radius (Jupiter)

0.213 R♃

Mass

6.30 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.54 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.301

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

#1343of 1978

top 67.8%

This planet

2.39R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-193 b 2.39 R⊕ Kepler-152 c 2.39 R⊕ Kepler-238 c 2.39 R⊕

Metric	Earth	Kepler-897 b	Jupiter
Radius (R⊕)	1.00	2.39	11.21
Mass (M⊕)	1.00	6.30	317.83
Density (g/cm³)	5.51	2.54	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	354.22	0.037

Star Catalogue Identifiers

TIC

TIC 290005350

Gaia DR2

Gaia DR2 2139225048663855872

Gaia DR3

Gaia DR3 2139225048663855872

System

Kepler-897

Percentile among Sub-Neptune cohort

Radius 2.390 R⊕ · percentile 31 / cohort 1978

Mass 6.300 M⊕ · percentile 30 / cohort 1978

Orbital period 8.05 d · percentile 26 / cohort 1946

Distance 1,519.25 pc · percentile 94 / cohort 1975

ESI 0.301 · percentile 28 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

8.047 days

Semi-major axis

0.0770 AU

Eccentricity

0.000

Inclination

79.30 °

Year Length

A year here lasts approximately 8.05 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0770 AU.

Transit Fingerprint

Depth

0.049 %

Duration

4.500 h

Impact parameter b

0.837

Rp / R★

0.021126

Transit midpoint (BJD)

2,454,970.2086

Photometric dip

Transit produces a flux drop of 486 ppm lasting ≈ 4.50 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021126

Semi-major axis / stellar radius

7.480

Impact parameter (b)

0.837

Transit mid-time (BJD)

2,454,970.2086

Angular separation (arcsec)

0.05070

Eq. Temperature

855K

(582 °C)

Insolation (S⊕)

354.22

Earth = 1.00

Earth Similarity (ESI)

0.301

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-897

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,839 K — hotter than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.040 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

0.775 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,519.25 parsec

Light-years 4,955.13 ly

V-band magnitude

15.18 mag

Voyager-speed travel 87,383,625 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.629 mas

Total Proper Motion

8.334 mas/yr

PM Right Ascension

-2.14 mas/yr

PM Declination

-8.05 mas/yr

Galactic Cartesian (pc)

x = 0.218 · y = -0.580 · z = 0.785

Equatorial (J2000)

RA 290.58680° · Dec 51.69577°

Galactic ℓ, b

83.102° · 16.478°

Ecliptic λ, β

314.699° · 71.950°

HTM-20 index

8421609