Key parameters at a glance

A radius of 11.25 Earth radii
A mass of 415.40 Earth masses
Surface gravity around 3.28 g
An orbital period of 94.102 days
Semi-major axis 0.3715 AU
Equilibrium temperature 338 K (65 °C)
Distance from Earth 603.34 light-years
Earth Similarity Index 0.445
Travel time at Voyager 1 speed 10,639,952 years

1 sibling around TOI-2537

TOI-2537 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-2537 b this	Gas Giant	11.25	415.40	94.102	338	2024
TOI-2537 c	Gas Giant	12.70	2,297.90	1,920.000	123	2024

TOI-2537 b Planet Profile

Physical Specs

Radius

11.25 R⊕

Radius (Jupiter)

1.004 R♃

Mass

415.40 M⊕

Mass (Jupiter)

1.307 M♃

Density

1.60 g/cm³

Surface Gravity

3.28 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.445

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

#1623of 1771

top 91.6%

This planet

11.25R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

KOI-351 h 11.25 R⊕ TIC 172900988 b 11.25 R⊕ TOI-2449 b 11.24 R⊕

Metric	Earth	TOI-2537 b	Jupiter
Radius (R⊕)	1.00	11.25	11.21
Mass (M⊕)	1.00	415.40	317.83
Density (g/cm³)	5.51	1.60	1.33
Surface Gravity (g)	1.00	3.28	2.53
Insolation (S⊕)	1.00	7.44	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	415.402 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	415.402 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 399967279

Gaia DR2

Gaia DR2 12320268307415552

Gaia DR3

Gaia DR3 12320268307415552

System

TOI-2537

Percentile among Gas Giant cohort

Radius 11.254 R⊕ · percentile 8 / cohort 1771

Mass 415.402 M⊕ · percentile 43 / cohort 1747

Orbital period 94.10 d · percentile 53 / cohort 1533

Distance 184.99 pc · percentile 48 / cohort 1759

ESI 0.445 · percentile 99 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

94.102 days

Semi-major axis

0.3715 AU

Eccentricity

0.364

Inclination

89.59 °

Year Length

A year here lasts approximately 94.10 Earth days (25.8% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.3715 AU.

Transit Fingerprint

Depth

1.791 %

Duration

4.937 h

Impact parameter b

0.480

Rp / R★

0.133800

Transit midpoint (BJD)

2,458,440.3290

Photometric dip

Transit produces a flux drop of 17,910 ppm lasting ≈ 4.94 h.

Extended Orbital Architecture

Planet / star radius ratio

0.133800

Impact parameter (b)

0.480

RV semi-amplitude (K)

74.700 m/s

Transit mid-time (BJD)

2,458,440.3290

Long. of periastron (ω)

75.20°

Angular separation (arcsec)

2.01000

Eq. Temperature

338K

(65 °C)

Insolation (S⊕)

7.44

Earth = 1.00

Earth Similarity (ESI)

0.445

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

Detection Signatures

Transit photometry

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

Radial velocity

Stellar wobble has been measured spectroscopically.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Heidari et al. 2024

Instrument

TESS CCD Array

Publication

2025-02

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-2537

Spectral Class

K-type orange

Effective Temperature

4,870 K — cooler than the Sun (5,778 K)

Estimated Age

1.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.771 R☉

Stellar Mass

0.771 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.551 dex

Stellar density

2.370 g/cm³

Rotational v·sin i

3.00 km/s

Rotation period

19.00 days

Activity index (log R'HK)

-4.500

Metallicity ratio

[Fe/H]

Distance

184.99 parsec

Light-years 603.34 ly

V-band magnitude

13.24 mag

Voyager-speed travel 10,639,952 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

5.378 mas

Total Proper Motion

47.925 mas/yr

PM Right Ascension

31.44 mas/yr

PM Declination

-36.17 mas/yr

Galactic Cartesian (pc)

x = 0.573 · y = 0.800 · z = 0.175

Equatorial (J2000)

RA 54.38827° · Dec 10.05775°

Galactic ℓ, b

175.953° · -35.197°

Ecliptic λ, β

54.500° · -9.102°

HTM-20 index

488728395

Similar Worlds

WASP-69 b

Gas Giant · K-type orange

Radius 11.21 R⊕ · 162.9 ly

WASP-162 b

Gas Giant · K-type orange

Radius 11.21 R⊕ · 1,013.8 ly

HAT-P-19 b

Gas Giant · K-type orange

Radius 11.30 R⊕ · 659.1 ly

WASP-80 b

Gas Giant · K-type orange

Radius 11.20 R⊕ · 162.4 ly

HAT-P-52 b

Gas Giant · K-type orange

Radius 11.31 R⊕ · 1,177.9 ly

Qatar-9 b

Gas Giant · K-type orange

Radius 11.31 R⊕ · 697.2 ly

Explore Related Categories

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