Key parameters at a glance

A radius of 15.92 Earth radii
A mass of 181.16 Earth masses
Surface gravity around 0.72 g
An orbital period of 3.312 days
Semi-major axis 0.0440 AU
Equilibrium temperature 1,750 K (1477 °C)
Distance from Earth 2,731.42 light-years
Earth Similarity Index 0.057
Travel time at Voyager 1 speed 48,168,523 years

NGTS-32 b Planet Profile

Physical Specs

Radius

15.92 R⊕

Radius (Jupiter)

1.420 R♃

Mass

181.16 M⊕

Mass (Jupiter)

0.570 M♃

Density

0.24 g/cm³

Surface Gravity

0.72 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.057

HZ Position Inner

Controversial No

Discovery

Year 2025

Method Transit

Facility Next-Generation Transit Survey (NGTS)

Telescope 20 cm NGTS telescope

Size rank in cohort

Rank by radius

#169of 1771

top 9.5%

This planet

15.92R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-73 b 15.92 R⊕ WASP-3 b 15.92 R⊕ HAT-P-14 b 15.92 R⊕

Metric	Earth	NGTS-32 b	Jupiter
Radius (R⊕)	1.00	15.92	11.21
Mass (M⊕)	1.00	181.16	317.83
Density (g/cm³)	5.51	0.24	1.33
Surface Gravity (g)	1.00	0.72	2.53
Insolation (S⊕)	1.00	1,554.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	181.162 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 309694541

Gaia DR2

Gaia DR2 6305395724382388224

Gaia DR3

Gaia DR3 6305395724382388224

System

NGTS-32

Percentile among Gas Giant cohort

Radius 15.917 R⊕ · percentile 90 / cohort 1771

Mass 181.162 M⊕ · percentile 16 / cohort 1747

Orbital period 3.31 d · percentile 20 / cohort 1533

Distance 837.46 pc · percentile 84 / cohort 1759

ESI 0.057 · percentile 7 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.312 days

Semi-major axis

0.0440 AU

Eccentricity

0.000

Inclination

86.90 °

Year Length

A year here lasts approximately 3.31 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0440 AU.

Transit Fingerprint

Impact parameter b

0.290

Rp / R★

0.080000

Transit midpoint (BJD)

2,459,435.7630

Extended Orbital Architecture

Planet / star radius ratio

0.080000

Semi-major axis / stellar radius

5.280

Impact parameter (b)

0.290

RV semi-amplitude (K)

75.170 m/s

Transit mid-time (BJD)

2,459,435.7630

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

0.05250

Eq. Temperature

1,750K

(1477 °C)

Insolation (S⊕)

1,554.00

Earth = 1.00

Earth Similarity (ESI)

0.057

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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

Vines et al. 2025

Instrument

NGTS CCD array

Publication

2025-01

Observation locale

Ground

Host System: NGTS-32

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,680 K — cooler than the Sun (5,778 K)

Estimated Age

8.03 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.850 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.090 dex

Stellar density

0.253 g/cm³

Rotational v·sin i

6.60 km/s

Metallicity ratio

[Fe/H]

Distance

837.46 parsec

Light-years 2,731.42 ly

V-band magnitude

13.59 mag

Voyager-speed travel 48,168,523 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

1.166 mas

Total Proper Motion

21.239 mas/yr

PM Right Ascension

-21.14 mas/yr

PM Declination

-2.07 mas/yr

Galactic Cartesian (pc)

x = -0.684 · y = -0.657 · z = -0.316

Equatorial (J2000)

RA 223.85762° · Dec -18.43232°

Galactic ℓ, b

339.770° · 35.420°

Ecliptic λ, β

226.811° · -1.640°

HTM-20 index

1572924147