Key parameters at a glance

A radius of 2.45 Earth radii
A mass of 6.57 Earth masses
Surface gravity around 1.09 g
An orbital period of 2.680 days
Semi-major axis 0.0500 AU
Equilibrium temperature 771 K (498 °C)
Distance from Earth 159.41 light-years
Earth Similarity Index 0.331
Travel time at Voyager 1 speed 2,811,231 years
Almost certainly tidally locked to its host star given the close orbit

TOI-2274 b Planet Profile

Physical Specs

Radius

2.45 R⊕

Radius (Jupiter)

0.219 R♃

Mass

6.57 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.45 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.331

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

#1260of 1978

top 63.7%

This planet

2.45R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1176 b 2.45 R⊕ Kepler-243 b 2.45 R⊕ Kepler-570 b 2.45 R⊕

Metric	Earth	TOI-2274 b	Jupiter
Radius (R⊕)	1.00	2.45	11.21
Mass (M⊕)	1.00	6.57	317.83
Density (g/cm³)	5.51	2.45	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	83.71	0.037

Star Catalogue Identifiers

TIC

TIC 289164482

Gaia DR2

Gaia DR2 2110345512468201344

Gaia DR3

Gaia DR3 2110345512468201344

System

TOI-2274

Percentile among Sub-Neptune cohort

Radius 2.450 R⊕ · percentile 36 / cohort 1978

Mass 6.570 M⊕ · percentile 34 / cohort 1978

Orbital period 2.68 d · percentile 4 / cohort 1946

Distance 48.88 pc · percentile 12 / cohort 1975

ESI 0.331 · percentile 35 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.680 days

Semi-major axis

0.0500 AU

Eccentricity

—

Inclination

87.37 °

Year Length

A year here lasts approximately 2.68 Earth days (0.7% of a terrestrial year) at a mean orbital distance of 0.0500 AU.

Transit Fingerprint

Depth

0.083 %

Duration

0.903 h

Impact parameter b

0.780

Rp / R★

0.036000

Transit midpoint (BJD)

2,458,685.3661

Photometric dip

Transit produces a flux drop of 828 ppm lasting ≈ 0.90 h.

Extended Orbital Architecture

Planet / star radius ratio

0.036000

Semi-major axis / stellar radius

16.910

Impact parameter (b)

0.780

Transit mid-time (BJD)

2,458,685.3661

Angular separation (arcsec)

1.02000

Eq. Temperature

771K

(498 °C)

Insolation (S⊕)

83.71

Earth = 1.00

Earth Similarity (ESI)

0.331

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-2274

Spectral Class

M-type red dwarf

Effective Temperature

3,943 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.631 R☉

Stellar Mass

0.612 M☉

Metallicity [Fe/H]

—

Distance

48.88 parsec

Light-years 159.41 ly

V-band magnitude

12.00 mag

Voyager-speed travel 2,811,231 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

20.431 mas

Total Proper Motion

89.318 mas/yr

PM Right Ascension

-14.92 mas/yr

PM Declination

88.06 mas/yr

Galactic Cartesian (pc)

x = 0.099 · y = -0.754 · z = 0.650

Equatorial (J2000)

RA 277.45931° · Dec 40.54141°

Galactic ℓ, b

68.743° · 21.103°

Ecliptic λ, β

282.838° · 63.649°

HTM-20 index

-2084106833