Key parameters at a glance

A radius of 5.65 Earth radii
A mass of 27.20 Earth masses
Surface gravity around 0.85 g
An orbital period of 4.506 days
Semi-major axis 0.0468 AU
Equilibrium temperature 525 K (252 °C)
Distance from Earth 376.28 light-years
Earth Similarity Index 0.335
Travel time at Voyager 1 speed 6,635,749 years
Almost certainly tidally locked to its host star given the close orbit

TOI-1883 b Planet Profile

Physical Specs

Radius

5.65 R⊕

Radius (Jupiter)

0.504 R♃

Mass

27.20 M⊕

Mass (Jupiter)

0.085 M♃

Density

0.83 g/cm³

Surface Gravity

0.85 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.335

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

#306of 574

top 53.1%

This planet

5.65R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

K2-334 b 5.65 R⊕ TIC 434398831 c 5.63 R⊕ TOI-1410 c 5.63 R⊕

Metric	Earth	TOI-1883 b	Jupiter
Radius (R⊕)	1.00	5.65	11.21
Mass (M⊕)	1.00	27.20	317.83
Density (g/cm³)	5.51	0.83	1.33
Surface Gravity (g)	1.00	0.85	2.53
Insolation (S⊕)	1.00	17.94	0.037

Star Catalogue Identifiers

TIC

TIC 348755728

Gaia DR2

Gaia DR2 5735744144510573696

Gaia DR3

Gaia DR3 5735744144510573696

System

TOI-1883

Percentile among Neptune-like cohort

Radius 5.650 R⊕ · percentile 47 / cohort 574

Mass 27.200 M⊕ · percentile 45 / cohort 574

Orbital period 4.51 d · percentile 17 / cohort 524

Distance 115.37 pc · percentile 27 / cohort 572

ESI 0.335 · percentile 59 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

4.506 days

Semi-major axis

0.0468 AU

Eccentricity

—

Inclination

89.37 °

Year Length

A year here lasts approximately 4.51 Earth days (1.2% of a terrestrial year) at a mean orbital distance of 0.0468 AU.

Transit Fingerprint

Depth

1.252 %

Duration

2.039 h

Impact parameter b

0.210

Rp / R★

0.107600

Transit midpoint (BJD)

2,459,256.8481

Photometric dip

Transit produces a flux drop of 12,523 ppm lasting ≈ 2.04 h.

Extended Orbital Architecture

Planet / star radius ratio

0.107600

Semi-major axis / stellar radius

19.110

Impact parameter (b)

0.210

Transit mid-time (BJD)

2,459,256.8481

Angular separation (arcsec)

0.40600

Eq. Temperature

525K

(252 °C)

Insolation (S⊕)

17.94

Earth = 1.00

Earth Similarity (ESI)

0.335

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

Pel & Aacute Ez Torres et al. 2024

Instrument

TESS CCD Array

Publication

2024-10

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-1883

Spectral Class

M-type red dwarf

Effective Temperature

3,477 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.494 R☉

Stellar Mass

0.492 M☉

Metallicity [Fe/H]

—

Distance

115.37 parsec

Light-years 376.28 ly

V-band magnitude

15.79 mag

Voyager-speed travel 6,635,749 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.640 mas

Total Proper Motion

30.913 mas/yr

PM Right Ascension

30.75 mas/yr

PM Declination

3.17 mas/yr

Galactic Cartesian (pc)

x = -0.678 · y = 0.700 · z = -0.224

Equatorial (J2000)

RA 134.08925° · Dec -12.93064°

Galactic ℓ, b

240.200° · 20.346°

Ecliptic λ, β

140.786° · -28.932°

HTM-20 index

-1924043030