Confirmed Exoplanet Discovered 2022

TOI-500 c

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

Key parameters at a glance

  • A radius of 2.09 Earth radii
  • A mass of 5.03 Earth masses
  • Surface gravity around 1.15 g
  • An orbital period of 6.636 days
  • Distance from Earth 154.57 light-years
  • Earth Similarity Index 0.770
  • 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 c 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 this Sub-Neptune 2.09 5.03 6.636 — 2022
TOI-500 d Neptune-like 6.35 33.12 26.233 — 2022
TOI-500 e Sub-Neptune 3.99 15.05 61.300 — 2022

TOI-500 c Planet Profile

Physical Specs

Radius
2.09 R⊕
Radius (Jupiter)
0.187 R♃
Mass
5.03 M⊕
Mass (Jupiter)
0.016 M♃
Density
3.03 g/cm³
Surface Gravity
1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.770
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

#1832of 1978

top 92.6%

This planet

2.09R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-317 b 2.09 R⊕ Kepler-151 c 2.09 R⊕ Kepler-372 c 2.09 R⊕
Metric Earth TOI-500 c Jupiter
Radius (R⊕)1.002.0911.21
Mass (M⊕)1.005.03317.83
Density (g/cm³)5.513.031.33
Surface Gravity (g)1.001.152.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 5.030 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 Sub-Neptune cohort

Radius 2.090 R⊕ · percentile 7 / cohort 1978
Mass 5.030 M⊕ · percentile 9 / cohort 1978
Orbital period 6.64 d · percentile 21 / cohort 1946
Distance 47.39 pc · percentile 11 / cohort 1975
ESI 0.770 · percentile 98 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period
6.636 days
Semi-major axis
— AU
Eccentricity
0.072
Inclination
— °

Year Length

A year here lasts approximately 6.64 Earth days (1.8% of a terrestrial year) on a nearly circular orbit.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.770

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).

pi Men d · Sub-Neptune TOI-500 e · Sub-Neptune CoRoT-7 d · Neptune-like TOI-500 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

Kepler-934 b

Sub-Neptune · K-type orange

Radius 2.09 R⊕ · 1,985.4 ly

Kepler-691 b

Sub-Neptune · K-type orange

Radius 2.09 R⊕ · 910.4 ly

EPIC 206317286 c

Sub-Neptune · K-type orange

Radius 2.09 R⊕ · 1,025.3 ly

Kepler-237 c

Sub-Neptune · K-type orange

Radius 2.08 R⊕ · 2,145.5 ly

Kepler-1529 b

Sub-Neptune · K-type orange

Radius 2.10 R⊕ · 2,155.9 ly

Kepler-900 b

Sub-Neptune · K-type orange

Radius 2.08 R⊕ · 1,590.1 ly

Explore Related Categories

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