Confirmed Exoplanet Discovered 2018

CoRoT-32 b

A neptune-like orbiting the g-type yellow (sun-like) CoRoT-32, located approximately 1,880.9 light-years from Earth.

Key parameters at a glance

  • A radius of 6.39 Earth radii
  • A mass of 47.67 Earth masses
  • Surface gravity around 1.17 g
  • An orbital period of 6.718 days
  • Semi-major axis 0.0710 AU
  • Equilibrium temperature 938 K (665 °C)
  • Distance from Earth 1,880.89 light-years
  • Earth Similarity Index 0.193
  • Travel time at Voyager 1 speed 33,169,426 years

CoRoT-32 b Planet Profile

Physical Specs

Radius
6.39 R⊕
Radius (Jupiter)
0.570 R♃
Mass
47.67 M⊕
Mass (Jupiter)
0.150 M♃
Density
1.10 g/cm³
Surface Gravity
1.17 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.193
HZ Position Inner
Controversial No

Discovery

Year 2018
Method Transit
Facility CoRoT
Telescope 0.27 m CoRoT Telescope

Size rank in cohort

Rank by radius

#251of 574

top 43.6%

This planet

6.39R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Metric Earth CoRoT-32 b Jupiter
Radius (R⊕)1.006.3911.21
Mass (M⊕)1.0047.67317.83
Density (g/cm³)5.511.101.33
Surface Gravity (g)1.001.172.53
Insolation (S⊕)1.00132.260.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 47.675 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 220323515

Gaia DR2

Gaia DR2 3326541506073371776

Gaia DR3

Gaia DR3 3326541506073371776

System

CoRoT-32

Percentile among Neptune-like cohort

Radius 6.389 R⊕ · percentile 56 / cohort 574
Mass 47.675 M⊕ · percentile 69 / cohort 574
Orbital period 6.72 d · percentile 27 / cohort 524
Distance 576.68 pc · percentile 60 / cohort 572
ESI 0.193 · percentile 26 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period
6.718 days
Semi-major axis
0.0710 AU
Eccentricity
Inclination
89.00 °

Year Length

A year here lasts approximately 6.72 Earth days (1.8% of a terrestrial year) at a mean orbital distance of 0.0710 AU.

Transit Fingerprint

Depth

0.290 %

Duration

2.496 h

Impact parameter b

0.400

Rp / R★

0.054000

Transit midpoint (BJD)

2,455,901.8110

Photometric dip

Transit produces a flux drop of 2,900 ppm lasting ≈ 2.50 h.

Extended Orbital Architecture

Planet / star radius ratio

0.054000

Semi-major axis / stellar radius

11.690

Impact parameter (b)

0.400

RV semi-amplitude (K)

14.000 m/s

Transit mid-time (BJD)

2,455,901.8110

Angular separation (arcsec)

0.12300

Eq. Temperature

938K

(665 °C)

Insolation (S⊕)

132.26

Earth = 1.00

Earth Similarity (ESI)

0.193

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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

Boufleur et al. 2018

Instrument

CoRoT CCD Array

Publication

2018-01

Observation locale

Space

Host System: CoRoT-32

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,970 K — hotter than the Sun (5,778 K)

Estimated Age

Stellar Radius

0.790 R☉

Stellar Mass

1.080 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.670 dex

Stellar density

1.573 g/cm³

Rotational v·sin i

3.20 km/s

Metallicity ratio

[Fe/H]

Distance
576.68 parsec
Light-years 1,880.89 ly
V-band magnitude
13.63 mag
Voyager-speed travel 33,169,426 yr

Multi-band Host Photometry — 16 bands

7.916.715.50U14.40B13.63V13.59Gaia13.14TESS14.11Sloan g13.67Sloan r16.70Sloan i13.45Sloan z12.52J12.25H12.19K12.13W112.16W211.38W37.85W4

Astrometric Data

Parallax

1.706 mas

Total Proper Motion

4.660 mas/yr

PM Right Ascension

0.98 mas/yr

PM Declination

-4.56 mas/yr

Galactic Cartesian (pc)

x = -0.175 · y = 0.971 · z = 0.161

Equatorial (J2000)

RA 100.19517° · Dec 9.25740°

Galactic ℓ, b

203.482° · 1.864°

Ecliptic λ, β

100.360° · -13.816°

HTM-20 index

-636631705

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