Confirmed Exoplanet Discovered 2024

TOI-1683.01

A sub-neptune orbiting the k-type orange TOI-1683, located approximately 167.0 light-years from Earth.

Key parameters at a glance

  • A radius of 2.64 Earth radii
  • A mass of 7.45 Earth masses
  • Surface gravity around 1.07 g
  • An orbital period of 3.058 days
  • Semi-major axis 0.0365 AU
  • Equilibrium temperature 929 K (656 °C)
  • Distance from Earth 166.95 light-years
  • Earth Similarity Index 0.265
  • Travel time at Voyager 1 speed 2,944,234 years
  • Almost certainly tidally locked to its host star given the close orbit

TOI-1683.01 Planet Profile

Physical Specs

Radius
2.64 R⊕
Radius (Jupiter)
0.235 R♃
Mass
7.45 M⊕
Mass (Jupiter)
0.024 M♃
Density
2.23 g/cm³
Surface Gravity
1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.265
HZ Position Inner
Controversial No

Discovery

Year 2024
Method Transit
Facility Transiting Exoplanet Survey Satellite (TESS)
Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#968of 1978

top 48.9%

This planet

2.64R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1136 e 2.64 R⊕ Kepler-571 b 2.64 R⊕ TOI-421 b 2.64 R⊕
Metric Earth TOI-1683.01 Jupiter
Radius (R⊕)1.002.6411.21
Mass (M⊕)1.007.45317.83
Density (g/cm³)5.512.231.33
Surface Gravity (g)1.001.072.53
Insolation (S⊕)1.00163.060.037

Star Catalogue Identifiers

HIP

HIP 20528

TIC

TIC 58542531

Gaia DR2

Gaia DR2 152451414656258560

Gaia DR3

Gaia DR3 152451414656258560

System

TOI-1683

Percentile among Sub-Neptune cohort

Radius 2.638 R⊕ · percentile 51 / cohort 1978
Mass 7.450 M⊕ · percentile 47 / cohort 1978
Orbital period 3.06 d · percentile 5 / cohort 1946
Distance 51.19 pc · percentile 12 / cohort 1975
ESI 0.265 · percentile 20 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period
3.058 days
Semi-major axis
0.0365 AU
Eccentricity
—
Inclination
— °

Year Length

A year here lasts approximately 3.06 Earth days (0.8% of a terrestrial year) at a mean orbital distance of 0.0365 AU.

Transit Fingerprint

Depth

0.112 %

Duration

1.318 h

Rp / R★

0.034524

Transit midpoint (BJD)

2,458,816.4115

Photometric dip

Transit produces a flux drop of 1,118 ppm lasting ≈ 1.32 h.

Extended Orbital Architecture

Planet / star radius ratio

0.034524

Semi-major axis / stellar radius

11.220

Transit mid-time (BJD)

2,458,816.4115

Angular separation (arcsec)

0.71300

Eq. Temperature

929K

(656 °C)

Insolation (S⊕)

163.06

Earth = 1.00

Earth Similarity (ESI)

0.265

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Hord et al. 2024

Instrument

TESS CCD Array

Publication

2024-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

Gliese 12 b · Rocky Terrestrial TOI-6002 b · Super-Earth TOI-5713 b · Super-Earth TOI-4336 A b · Sub-Neptune TOI-406.01 · Sub-Neptune TOI-1224 c · Sub-Neptune LHS 1678 d · Rocky Terrestrial TOI-2088 b · Sub-Neptune TOI-2120 b · Sub-Neptune TOI-1806.01 · Sub-Neptune TOI-4633 c · Sub-Neptune TOI-260 b · Super-Earth

Host System: TOI-1683

Spectral Class

K-type orange

Effective Temperature

4,402 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.700 R☉

Stellar Mass

0.695 M☉

Metallicity [Fe/H]

—

Distance
51.19 parsec
Light-years 166.95 ly
V-band magnitude
10.97 mag
Voyager-speed travel 2,944,234 yr

Multi-band Host Photometry — 14 bands

8.015.515.52U12.11B10.97V10.51Gaia9.79TESS11.74Sloan g10.55Sloan r10.20Sloan i10.28Sloan z8.82J8.21H8.09K8.00W18.07W2

Astrometric Data

Parallax

19.507 mas

Total Proper Motion

43.974 mas/yr

PM Right Ascension

-16.02 mas/yr

PM Declination

-40.95 mas/yr

Galactic Cartesian (pc)

x = 0.360 · y = 0.808 · z = 0.467

Equatorial (J2000)

RA 65.97965° · Dec 27.82237°

Galactic ℓ, b

170.031° · -15.043°

Ecliptic λ, β

68.768° · 6.136°

HTM-20 index

1658606435

Similar Worlds

Kepler-721 b

Sub-Neptune · K-type orange

Radius 2.64 R⊕ · 3,022.2 ly

Artist impression of GJ 414 A b exoplanet

GJ 414 A b

Sub-Neptune · K-type orange

Radius 2.63 R⊕ · 38.8 ly

Kepler-1822 b

Sub-Neptune · K-type orange

Radius 2.65 R⊕ · 2,927.6 ly

K2-165 d

Sub-Neptune · K-type orange

Radius 2.65 R⊕ · 439.0 ly

HD 39194 c

Sub-Neptune · K-type orange

Radius 2.65 R⊕ · 86.1 ly

TOI-277 b

Sub-Neptune · K-type orange

Radius 2.65 R⊕ · 210.9 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries Transiting Exoplanet Survey Satellite (TESS) Mission K-type orange Hosts