Key parameters at a glance

A radius of 2.99 Earth radii
A mass of 9.22 Earth masses
Surface gravity around 1.03 g
An orbital period of 37.946 days
Semi-major axis 0.2181 AU
Equilibrium temperature 515 K (242 °C)
Distance from Earth 3,659.11 light-years
Earth Similarity Index 0.451
Travel time at Voyager 1 speed 64,528,429 years

Kepler-1175 b Planet Profile

Physical Specs

Radius

2.99 R⊕

Radius (Jupiter)

0.267 R♃

Mass

9.22 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.90 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.451

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

#529of 1978

top 26.7%

This planet

2.99R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-255 c 2.99 R⊕ Kepler-978 b 2.99 R⊕ MOA-2010-BLG-328L b 2.99 R⊕

Metric	Earth	Kepler-1175 b	Jupiter
Radius (R⊕)	1.00	2.99	11.21
Mass (M⊕)	1.00	9.22	317.83
Density (g/cm³)	5.51	1.90	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	12.94	0.037

Star Catalogue Identifiers

TIC

TIC 158986028

Gaia DR2

Gaia DR2 2127781228564883456

Gaia DR3

Gaia DR3 2127781228564883456

System

Kepler-1175

Percentile among Sub-Neptune cohort

Radius 2.990 R⊕ · percentile 73 / cohort 1978

Mass 9.220 M⊕ · percentile 67 / cohort 1978

Orbital period 37.95 d · percentile 79 / cohort 1946

Distance 1,121.89 pc · percentile 84 / cohort 1975

ESI 0.451 · percentile 62 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

37.946 days

Semi-major axis

0.2181 AU

Eccentricity

0.000

Inclination

89.79 °

Year Length

A year here lasts approximately 37.95 Earth days (10.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2181 AU.

Transit Fingerprint

Depth

0.103 %

Duration

4.025 h

Impact parameter b

0.914

Rp / R★

0.031841

Transit midpoint (BJD)

2,454,967.7827

Photometric dip

Transit produces a flux drop of 1,033 ppm lasting ≈ 4.03 h.

Extended Orbital Architecture

Planet / star radius ratio

0.031841

Semi-major axis / stellar radius

30.000

Impact parameter (b)

0.914

Transit mid-time (BJD)

2,454,967.7827

Angular separation (arcsec)

0.19400

Eq. Temperature

515K

(242 °C)

Insolation (S⊕)

12.94

Earth = 1.00

Earth Similarity (ESI)

0.451

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-1175

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,453 K — cooler than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.900 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

4.605 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,121.89 parsec

Light-years 3,659.11 ly

V-band magnitude

15.97 mag

Voyager-speed travel 64,528,429 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.864 mas

Total Proper Motion

22.060 mas/yr

PM Right Ascension

1.71 mas/yr

PM Declination

21.99 mas/yr

Galactic Cartesian (pc)

x = 0.224 · y = -0.647 · z = 0.729

Equatorial (J2000)

RA 289.14268° · Dec 46.81297°

Galactic ℓ, b

78.049° · 15.415°

Ecliptic λ, β

306.508° · 67.840°

HTM-20 index

1839319169