Key parameters at a glance

A radius of 13.61 Earth radii
A mass of 165.27 Earth masses
Surface gravity around 0.89 g
An orbital period of 3.468 days
Semi-major axis 0.0479 AU
Equilibrium temperature 1,499 K (1226 °C)
Distance from Earth 2,227.85 light-years
Earth Similarity Index 0.077
Travel time at Voyager 1 speed 39,288,092 years

NGTS-24 b Planet Profile

Physical Specs

Radius

13.61 R⊕

Radius (Jupiter)

1.214 R♃

Mass

165.27 M⊕

Mass (Jupiter)

0.520 M♃

Density

0.36 g/cm³

Surface Gravity

0.89 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.077

HZ Position Inner

Controversial No

Discovery

Year 2022

Method Transit

Facility Next-Generation Transit Survey (NGTS)

Telescope 20 cm NGTS telescope

Size rank in cohort

Rank by radius

#608of 1771

top 34.3%

This planet

13.61R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 19994 b 13.60 R⊕ HD 205739 b 13.60 R⊕ HD 79498 b 13.60 R⊕

Metric	Earth	NGTS-24 b	Jupiter
Radius (R⊕)	1.00	13.61	11.21
Mass (M⊕)	1.00	165.27	317.83
Density (g/cm³)	5.51	0.36	1.33
Surface Gravity (g)	1.00	0.89	2.53
Insolation (S⊕)	1.00	391.83	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	165.271 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 151920165

Gaia DR2

Gaia DR2 5397086969654628864

Gaia DR3

Gaia DR3 5397086969654628864

System

NGTS-24

Percentile among Gas Giant cohort

Radius 13.608 R⊕ · percentile 66 / cohort 1771

Mass 165.271 M⊕ · percentile 14 / cohort 1747

Orbital period 3.47 d · percentile 22 / cohort 1533

Distance 683.06 pc · percentile 81 / cohort 1759

ESI 0.077 · percentile 17 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.468 days

Semi-major axis

0.0479 AU

Eccentricity

0.000

Inclination

82.61 °

Year Length

A year here lasts approximately 3.47 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0479 AU.

Transit Fingerprint

Depth

0.477 %

Duration

2.929 h

Impact parameter b

0.821

Rp / R★

0.076800

Transit midpoint (BJD)

2,458,100.6229

Photometric dip

Transit produces a flux drop of 4,770 ppm lasting ≈ 2.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.076800

Semi-major axis / stellar radius

6.370

Impact parameter (b)

0.821

RV semi-amplitude (K)

62.000 m/s

Transit mid-time (BJD)

2,458,100.6229

Angular separation (arcsec)

0.07010

Eq. Temperature

1,499K

(1226 °C)

Insolation (S⊕)

391.83

Earth = 1.00

Earth Similarity (ESI)

0.077

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Jackson et al. 2022

Instrument

NGTS CCD array

Publication

2022-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Next-Generation Transit Survey (NGTS) (3 shown).

NGTS-25 b · Gas Giant NGTS-21 b · Gas Giant NGTS-23 b · Gas Giant

Host System: NGTS-24

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,820 K — hotter than the Sun (5,778 K)

Estimated Age

4.77 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.640 R☉

Stellar Mass

1.260 M☉

Metallicity [Fe/H]

0.27

Extended Stellar Properties

Surface gravity (log g)

4.090 dex

Stellar density

0.406 g/cm³

Metallicity ratio

[Fe/H]

Distance

683.06 parsec

Light-years 2,227.85 ly

V-band magnitude

13.21 mag

Voyager-speed travel 39,288,092 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

1.435 mas

Total Proper Motion

0.834 mas/yr

PM Right Ascension

-0.63 mas/yr

PM Declination

0.54 mas/yr

Galactic Cartesian (pc)

x = -0.773 · y = 0.156 · z = -0.614

Equatorial (J2000)

RA 168.56389° · Dec -37.91013°

Galactic ℓ, b

282.572° · 21.089°

Ecliptic λ, β

187.428° · -38.752°

HTM-20 index

1613406378