Key parameters at a glance

A radius of 0.82 Earth radii
A mass of 0.48 Earth masses
Surface gravity around 0.71 g
An orbital period of 2.209 days
Semi-major axis 0.0328 AU
Equilibrium temperature 1,507 K (1234 °C)
Distance from Earth 2,101.93 light-years
Earth Similarity Index 0.193
Travel time at Voyager 1 speed 37,067,567 years

Kepler-1601 b Planet Profile

Physical Specs

Radius

0.82 R⊕

Radius (Jupiter)

0.073 R♃

Mass

0.48 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.75 g/cm³

Surface Gravity

0.71 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.193

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

#465of 570

top 81.4%

This planet

0.82R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-32 f 0.82 R⊕ Kepler-106 b 0.82 R⊕ Kepler-390 b 0.82 R⊕

Metric	Earth	Kepler-1601 b	Jupiter
Radius (R⊕)	1.00	0.82	11.21
Mass (M⊕)	1.00	0.48	317.83
Density (g/cm³)	5.51	4.75	1.33
Surface Gravity (g)	1.00	0.71	2.53
Insolation (S⊕)	1.00	999.75	0.037

Star Catalogue Identifiers

TIC

TIC 120571308

Gaia DR2

Gaia DR2 2099912182214036608

Gaia DR3

Gaia DR3 2099912182214036608

System

Kepler-1601

Percentile among Rocky Terrestrial cohort

Radius 0.820 R⊕ · percentile 17 / cohort 570

Mass 0.477 M⊕ · percentile 15 / cohort 570

Orbital period 2.21 d · percentile 24 / cohort 567

Distance 644.46 pc · percentile 76 / cohort 566

ESI 0.193 · percentile 13 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.209 days

Semi-major axis

0.0328 AU

Eccentricity

0.000

Inclination

89.11 °

Year Length

A year here lasts approximately 2.21 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0328 AU.

Transit Fingerprint

Depth

0.006 %

Duration

2.730 h

Impact parameter b

0.110

Rp / R★

0.007391

Transit midpoint (BJD)

2,454,964.9084

Photometric dip

Transit produces a flux drop of 60 ppm lasting ≈ 2.73 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007391

Semi-major axis / stellar radius

7.088

Impact parameter (b)

0.110

Transit mid-time (BJD)

2,454,964.9084

Angular separation (arcsec)

0.05090

Eq. Temperature

1,507K

(1234 °C)

Insolation (S⊕)

999.75

Earth = 1.00

Earth Similarity (ESI)

0.193

0 = alien, 1 = Earth-identical

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

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-1601

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,869 K — hotter than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.070 R☉

Stellar Mass

1.040 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

0.840 g/cm³

Metallicity ratio

[Fe/H]

Distance

644.46 parsec

Light-years 2,101.93 ly

V-band magnitude

13.84 mag

Voyager-speed travel 37,067,567 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.523 mas

Total Proper Motion

13.582 mas/yr

PM Right Ascension

-1.84 mas/yr

PM Declination

13.46 mas/yr

Galactic Cartesian (pc)

x = 0.211 · y = -0.758 · z = 0.617

Equatorial (J2000)

RA 285.51295° · Dec 38.07984°

Galactic ℓ, b

68.656° · 14.406°

Ecliptic λ, β

295.041° · 60.177°

HTM-20 index

430537963