Key parameters at a glance

A radius of 14.89 Earth radii
A mass of 92.81 Earth masses
Surface gravity around 0.42 g
An orbital period of 4.520 days
Semi-major axis 0.0490 AU
Equilibrium temperature 1,331 K (1058 °C)
Distance from Earth 3,567.14 light-years
Earth Similarity Index 0.073
Travel time at Voyager 1 speed 62,906,432 years

NGTS-26 b Planet Profile

Physical Specs

Radius

14.89 R⊕

Radius (Jupiter)

1.328 R♃

Mass

92.81 M⊕

Mass (Jupiter)

0.292 M♃

Density

0.15 g/cm³

Surface Gravity

0.42 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.073

HZ Position Inner

Controversial No

Discovery

Year 2024

Method Transit

Facility Next-Generation Transit Survey (NGTS)

Telescope 20 cm NGTS telescope

Size rank in cohort

Rank by radius

#245of 1771

top 13.8%

This planet

14.89R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-36 b 14.87 R⊕ HATS-18 b 14.90 R⊕ NGTS-6 b 14.86 R⊕

Metric	Earth	NGTS-26 b	Jupiter
Radius (R⊕)	1.00	14.89	11.21
Mass (M⊕)	1.00	92.81	317.83
Density (g/cm³)	5.51	0.15	1.33
Surface Gravity (g)	1.00	0.42	2.53
Insolation (S⊕)	1.00	523.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	92.806 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 392747437

Gaia DR2

Gaia DR2 6216644481523819776

Gaia DR3

Gaia DR3 6216644481523819776

System

NGTS-26

Percentile among Gas Giant cohort

Radius 14.886 R⊕ · percentile 86 / cohort 1771

Mass 92.806 M⊕ · percentile 5 / cohort 1747

Orbital period 4.52 d · percentile 33 / cohort 1533

Distance 1,093.69 pc · percentile 87 / cohort 1759

ESI 0.073 · percentile 15 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.520 days

Semi-major axis

0.0490 AU

Eccentricity

0.000

Inclination

86.43 °

Year Length

A year here lasts approximately 4.52 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0490 AU.

Transit Fingerprint

Duration

3.719 h

Rp / R★

0.116800

Transit midpoint (BJD)

2,457,756.8314

Extended Orbital Architecture

Planet / star radius ratio

0.116800

Semi-major axis / stellar radius

9.010

RV semi-amplitude (K)

36.700 m/s

Transit mid-time (BJD)

2,457,756.8314

Angular separation (arcsec)

0.04480

Eq. Temperature

1,331K

(1058 °C)

Insolation (S⊕)

523.00

Earth = 1.00

Earth Similarity (ESI)

0.073

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

Bouchy et al. 2024

Instrument

NGTS CCD array

Publication

2024-04

Observation locale

Ground

Host System: NGTS-26

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,550 K — cooler than the Sun (5,778 K)

Estimated Age

11.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.160 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

0.20

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.725 g/cm³

Systemic radial velocity

-28.35 km/s

Rotational v·sin i

1.50 km/s

Metallicity ratio

[Fe/H]

Distance

1,093.69 parsec

Light-years 3,567.14 ly

V-band magnitude

15.01 mag

Voyager-speed travel 62,906,432 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

0.887 mas

Total Proper Motion

14.216 mas/yr

PM Right Ascension

-11.31 mas/yr

PM Declination

-8.61 mas/yr

Galactic Cartesian (pc)

x = -0.673 · y = -0.520 · z = -0.526

Equatorial (J2000)

RA 217.68330° · Dec -31.73245°

Galactic ℓ, b

326.461° · 26.563°

Ecliptic λ, β

225.549° · -16.006°

HTM-20 index

904212229