Key parameters at a glance

A radius of 1.13 Earth radii
A mass of 1.26 Earth masses
Surface gravity around 0.99 g
An orbital period of 2.044 days
Equilibrium temperature 722 K (449 °C)
Distance from Earth 73.21 light-years
Earth Similarity Index 0.442
Travel time at Voyager 1 speed 1,291,080 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-1450 A

TOI-1450 A b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
TOI-1450 A b this	Rocky Terrestrial	1.13	1.26	2.044	722	2024
TOI-1450 A c	Rocky Terrestrial	1.13	1.53	5.069	533	2024

TOI-1450 A b Planet Profile

Physical Specs

Radius

1.13 R⊕

Radius (Jupiter)

0.101 R♃

Mass

1.26 M⊕

Mass (Jupiter)

0.004 M♃

Density

4.79 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.442

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

#180of 570

top 31.4%

This planet

1.13R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-1450 A c 1.13 R⊕ Kepler-250 b 1.13 R⊕ Kepler-887 c 1.13 R⊕

Metric	Earth	TOI-1450 A b	Jupiter
Radius (R⊕)	1.00	1.13	11.21
Mass (M⊕)	1.00	1.26	317.83
Density (g/cm³)	5.51	4.79	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	44.95	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1.258 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1.256 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 377293776

Gaia DR2

Gaia DR2 2155540255030594560

Gaia DR3

Gaia DR3 2155540255030594560

System

TOI-1450

Percentile among Rocky Terrestrial cohort

Radius 1.130 R⊕ · percentile 66 / cohort 570

Mass 1.258 M⊕ · percentile 49 / cohort 570

Orbital period 2.04 d · percentile 23 / cohort 567

Distance 22.45 pc · percentile 11 / cohort 566

ESI 0.442 · percentile 65 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.044 days

Semi-major axis

— AU

Eccentricity

—

Inclination

86.25 °

Year Length

A year here lasts approximately 2.04 Earth days (0.6% of a terrestrial year).

Transit Fingerprint

Depth

0.047 %

Duration

0.988 h

Impact parameter b

0.737

Transit midpoint (BJD)

2,458,685.3422

Photometric dip

Transit produces a flux drop of 465 ppm lasting ≈ 0.99 h.

Extended Orbital Architecture

Semi-major axis / stellar radius

11.230

Impact parameter (b)

0.737

RV semi-amplitude (K)

1.050 m/s

Transit mid-time (BJD)

2,458,685.3422

Eq. Temperature

722K

(449 °C)

Insolation (S⊕)

44.95

Earth = 1.00

Earth Similarity (ESI)

0.442

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.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Brady 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-1450 A

Spectral Class

M-type red dwarf

Effective Temperature

3,437 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.483 R☉

Stellar Mass

0.480 M☉

Metallicity [Fe/H]

-0.12

Extended Stellar Properties

Surface gravity (log g)

4.760 dex

Stellar density

6.420 g/cm³

Rotation period

35.00 days

Metallicity ratio

[Fe/H]

Distance

22.45 parsec

Light-years 73.21 ly

V-band magnitude

12.28 mag

Voyager-speed travel 1,291,080 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

44.521 mas

Total Proper Motion

175.419 mas/yr

PM Right Ascension

69.92 mas/yr

PM Declination

160.88 mas/yr

Galactic Cartesian (pc)

x = 0.149 · y = -0.492 · z = 0.858

Equatorial (J2000)

RA 286.85406° · Dec 59.08663°

Galactic ℓ, b

89.621° · 21.061°

Ecliptic λ, β

323.592° · 79.335°

HTM-20 index

-1546425538