Confirmed Exoplanet Discovered 2022

TOI-500 d

A neptune-like orbiting the k-type orange TOI-500, located approximately 154.6 light-years from Earth.

Key parameters at a glance

  • A radius of 6.35 Earth radii
  • A mass of 33.12 Earth masses
  • Surface gravity around 0.82 g
  • An orbital period of 26.233 days
  • Distance from Earth 154.57 light-years
  • Earth Similarity Index 0.411
  • Travel time at Voyager 1 speed 2,725,897 years
  • Almost certainly tidally locked to its host star given the close orbit

3 siblings around TOI-500

TOI-500 d shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet Type Radius (R⊕) Mass (M⊕) Period (d) Eq. T (K) Year
TOI-500 b Rocky Terrestrial 1.17 1.42 0.548 1,617 2022
TOI-500 c Sub-Neptune 2.09 5.03 6.636 — 2022
TOI-500 d this Neptune-like 6.35 33.12 26.233 — 2022
TOI-500 e Sub-Neptune 3.99 15.05 61.300 — 2022

TOI-500 d Planet Profile

Physical Specs

Radius
6.35 R⊕
Radius (Jupiter)
0.567 R♃
Mass
33.12 M⊕
Mass (Jupiter)
0.104 M♃
Density
0.71 g/cm³
Surface Gravity
0.82 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.411
HZ Position Unknown
Controversial No

Discovery

Year 2022
Method Radial Velocity
Facility La Silla Observatory
Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#252of 574

top 43.7%

This planet

6.35R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-511 b 6.35 R⊕ CoRoT-32 b 6.39 R⊕ HATS-7 b 6.31 R⊕
Metric Earth TOI-500 d Jupiter
Radius (R⊕)1.006.3511.21
Mass (M⊕)1.0033.12317.83
Density (g/cm³)5.510.711.33
Surface Gravity (g)1.000.822.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 33.120 M⊕ Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 134200185

Gaia DR2

Gaia DR2 5509620021956148736

Gaia DR3

Gaia DR3 5509620021956148736

System

TOI-500

Percentile among Neptune-like cohort

Radius 6.350 R⊕ · percentile 56 / cohort 574
Mass 33.120 M⊕ · percentile 55 / cohort 574
Orbital period 26.23 d · percentile 57 / cohort 524
Distance 47.39 pc · percentile 15 / cohort 572
ESI 0.411 · percentile 75 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period
26.233 days
Semi-major axis
— AU
Eccentricity
0.016
Inclination
— °

Year Length

A year here lasts approximately 26.23 Earth days (7.2% of a terrestrial year) on a nearly circular orbit.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.411

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Serrano et al. 2022

Instrument

HARPS Spectrograph

Publication

2022-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at La Silla Observatory (12 shown).

TOI-500 c · Sub-Neptune pi Men d · Sub-Neptune TOI-500 e · Sub-Neptune CoRoT-7 d · Neptune-like HD 69123 b · Gas Giant HD 103891 b · Gas Giant HD 114082 b · Gas Giant HD 64121 b · Gas Giant HD 22532 b · Gas Giant HD 29399 b · Gas Giant iot Dra c · Gas Giant HD 105779 b · Gas Giant

Host System: TOI-500

Spectral Class

K-type orange

Effective Temperature

4,440 K — cooler than the Sun (5,778 K)

Estimated Age

5.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.678 R☉

Stellar Mass

0.740 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.618 dex

Stellar density

2.322 g/cm³

Rotational v·sin i

1.10 km/s

Metallicity ratio

[Fe/H]

Distance
47.39 parsec
Light-years 154.57 ly
V-band magnitude
10.54 mag
Voyager-speed travel 2,725,897 yr

Multi-band Host Photometry — 11 bands

7.611.711.67B10.54V10.10Gaia9.40TESS8.40J7.85H7.72K7.63W17.74W27.66W37.62W4

Astrometric Data

Parallax

21.072 mas

Total Proper Motion

199.576 mas/yr

PM Right Ascension

135.80 mas/yr

PM Declination

-146.25 mas/yr

Galactic Cartesian (pc)

x = -0.192 · y = 0.646 · z = -0.738

Equatorial (J2000)

RA 106.55910° · Dec -47.58782°

Galactic ℓ, b

258.097° · -17.333°

Ecliptic λ, β

122.693° · -69.155°

HTM-20 index

-404337505

Similar Worlds

HATS-7 b

Neptune-like · K-type orange

Radius 6.31 R⊕ · 785.1 ly

CoRoT-8 b

Neptune-like · K-type orange

Radius 6.39 R⊕ · 1,050.3 ly

Kepler-1004 b

Neptune-like · K-type orange

Radius 6.28 R⊕ · 3,759.5 ly

K2-39 b

Neptune-like · K-type orange

Radius 6.28 R⊕ · 1,002.8 ly

Kepler-1628 b

Neptune-like · K-type orange

Radius 6.43 R⊕ · 1,148.1 ly

TIC 365102760 b

Neptune-like · K-type orange

Radius 6.21 R⊕ · 1,811.9 ly

Explore Related Categories

Neptune-like Planets Radial Velocity Discoveries La Silla Observatory Mission K-type orange Hosts