Key parameters at a glance

A radius of 1.13 Earth radii
A mass of 1.53 Earth masses
Surface gravity around 1.20 g
An orbital period of 5.069 days
Equilibrium temperature 533 K (260 °C)
Distance from Earth 73.21 light-years
Earth Similarity Index 0.592
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 c 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	Rocky Terrestrial	1.13	1.26	2.044	722	2024
TOI-1450 A c this	Rocky Terrestrial	1.13	1.53	5.069	533	2024

TOI-1450 A c Planet Profile

Physical Specs

Radius

1.13 R⊕

Radius (Jupiter)

0.101 R♃

Mass

1.53 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.82 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.592

HZ Position Unknown

Controversial No

Discovery

Year 2024

Method Transit

Facility Gemini Observatory

Telescope 8.19 m Gemini North 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

Kepler-887 c 1.13 R⊕ Kepler-250 b 1.13 R⊕ G 268-110 b 1.13 R⊕

Metric	Earth	TOI-1450 A c	Jupiter
Radius (R⊕)	1.00	1.13	11.21
Mass (M⊕)	1.00	1.53	317.83
Density (g/cm³)	5.51	5.82	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1.527 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 1.527 M⊕ · percentile 63 / cohort 570

Orbital period 5.07 d · percentile 54 / cohort 567

Distance 22.45 pc · percentile 11 / cohort 566

ESI 0.592 · percentile 77 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.069 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 5.07 Earth days (1.4% of a terrestrial year).

Eq. Temperature

533K

(260 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.592

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Brady et al. 2024

Instrument

MAROON-X

Publication

2024-05

Observation locale

Ground

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