Confirmed Exoplanet Discovered 2018

DE CVn b

A gas giant orbiting the m-type red dwarf DE CVn, located approximately 99.6 light-years from Earth.

Key parameters at a glance

  • A radius of 12.40 Earth radii
  • A mass of 3,823.27 Earth masses
  • Surface gravity around 24.87 g
  • An orbital period of 4,098.100 days
  • Semi-major axis 5.7500 AU
  • Distance from Earth 99.55 light-years
  • Earth Similarity Index 0.359
  • Travel time at Voyager 1 speed 1,755,581 years
brightness_6

Circumbinary planet

DE CVn b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

DE CVn b Planet Profile

Physical Specs

Radius
12.40 R⊕
Radius (Jupiter)
1.100 R♃
Mass
3,823.27 M⊕
Mass (Jupiter)
12.029 M♃
Density
11.00 g/cm³
Surface Gravity
24.87 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.359
HZ Position Unknown
Controversial No

Discovery

Year 2018
Method Eclipse Timing Variations
Facility Multiple Facilities
Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕
Metric Earth DE CVn b Jupiter
Radius (R⊕)1.0012.4011.21
Mass (M⊕)1.003,823.27317.83
Density (g/cm³)5.5111.001.33
Surface Gravity (g)1.0024.872.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 3,813.960 M⊕ Lower bound from radial-velocity fitting.
Computed mass 3,823.273 M⊕ Model-computed mass (e.g. from mass-radius relation).

Star Catalogue Identifiers

TIC

TIC 446175401

Gaia DR2

Gaia DR2 1550299304833675392

Gaia DR3

Gaia DR3 1550299304833675392

System

DE CVn

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771
Mass 3,823.273 M⊕ · percentile 91 / cohort 1747
Orbital period 4,098.10 d · percentile 91 / cohort 1533
Distance 30.52 pc · percentile 8 / cohort 1759
ESI 0.359 · percentile 73 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
4,098.100 days
Semi-major axis
5.7500 AU
Eccentricity
0.000
Inclination
86.00 °

Year Length

A year here lasts about 11.22 Earth years on a nearly circular orbit at a mean orbital distance of 5.7500 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.359

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2018

Instrument

Multiple Instruments

Publication

2018-11

Observation locale

Ground

Host System: DE CVn

Spectral Class

M-type red dwarf

Effective Temperature

3,579 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.425 R☉

Stellar Mass

0.510 M☉

Metallicity [Fe/H]

—

Distance
30.52 parsec
Light-years 99.55 ly
V-band magnitude
12.96 mag
Voyager-speed travel 1,755,581 yr

Multi-band Host Photometry — 16 bands

8.115.615.61U14.23B12.96V11.98Gaia10.86TESS14.89Sloan g12.51Sloan r11.45Sloan i12.43Sloan z9.39J8.80H8.56K8.45W18.31W28.22W38.15W4

Astrometric Data

Parallax

32.734 mas

Total Proper Motion

268.154 mas/yr

PM Right Ascension

-202.46 mas/yr

PM Declination

-175.83 mas/yr

Galactic Cartesian (pc)

x = -0.651 · y = -0.259 · z = 0.714

Equatorial (J2000)

RA 201.72072° · Dec 45.54554°

Galactic ℓ, b

104.288° · 70.278°

Ecliptic λ, β

175.940° · 49.288°

HTM-20 index

-1032854863

Similar Worlds

KOINTREAU-1 b

Gas Giant · M-type red dwarf

Radius 12.40 R⊕ · 517.3 ly

2MASS J0249-0557 c

Gas Giant · M-type red dwarf

Radius 12.40 R⊕ · 215.5 ly

2MASS J21252752-8138278 b

Gas Giant · M-type red dwarf

Radius 12.40 R⊕ · 111.3 ly

COCONUTS-2 b

Gas Giant · M-type red dwarf

Radius 12.44 R⊕ · 35.5 ly

USco CTIO 108 b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 469.7 ly

USco1556 b

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Radius 12.30 R⊕ · 458.7 ly

Explore Related Categories

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