Confirmed Exoplanet Discovered 2022

NGTS-25 b

A gas giant orbiting the k-type orange NGTS-25, located approximately 1,700.0 light-years from Earth.

Key parameters at a glance

  • A radius of 11.47 Earth radii
  • A mass of 203.09 Earth masses
  • Surface gravity around 1.54 g
  • An orbital period of 2.823 days
  • Semi-major axis 0.0388 AU
  • Equilibrium temperature 1,101 K (828 °C)
  • Distance from Earth 1,700.03 light-years
  • Earth Similarity Index 0.130
  • Travel time at Voyager 1 speed 29,980,075 years
  • Almost certainly tidally locked to its host star given the close orbit

NGTS-25 b Planet Profile

Physical Specs

Radius
11.47 R⊕
Radius (Jupiter)
1.023 R♃
Mass
203.09 M⊕
Mass (Jupiter)
0.639 M♃
Density
0.74 g/cm³
Surface Gravity
1.54 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.130
HZ Position Unknown
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

#1593of 1771

top 89.9%

This planet

11.47R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-5882 b 11.47 R⊕ TOI-1259 A b 11.46 R⊕ HATS-71 b 11.48 R⊕
Metric Earth NGTS-25 b Jupiter
Radius (R⊕)1.0011.4711.21
Mass (M⊕)1.00203.09317.83
Density (g/cm³)5.510.741.33
Surface Gravity (g)1.001.542.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 203.092 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 290742484

Gaia DR2

Gaia DR2 6682513094425008640

Gaia DR3

Gaia DR3 6682513094425008640

System

NGTS-25

Percentile among Gas Giant cohort

Radius 11.467 R⊕ · percentile 10 / cohort 1771
Mass 203.092 M⊕ · percentile 20 / cohort 1747
Orbital period 2.82 d · percentile 14 / cohort 1533
Distance 521.23 pc · percentile 76 / cohort 1759
ESI 0.130 · percentile 34 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
2.823 days
Semi-major axis
0.0388 AU
Eccentricity
0.000
Inclination
89.34 °

Year Length

A year here lasts approximately 2.82 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0388 AU.

Transit Fingerprint

Duration

2.466 h

Impact parameter b

0.113

Rp / R★

0.123100

Transit midpoint (BJD)

2,458,204.2637

Extended Orbital Architecture

Planet / star radius ratio

0.123100

Semi-major axis / stellar radius

9.780

Impact parameter (b)

0.113

RV semi-amplitude (K)

100.000 m/s

Transit mid-time (BJD)

2,458,204.2637

Angular separation (arcsec)

0.07440

Eq. Temperature

1,101K

(828 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.130

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

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-21 b · Gas Giant NGTS-23 b · Gas Giant NGTS-24 b · Gas Giant

Host System: NGTS-25

Spectral Class

K-type orange

Effective Temperature

5,321 K — cooler than the Sun (5,778 K)

Estimated Age

3.49 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

2.219 g/cm³

Rotational v·sin i

1.96 km/s

Metallicity ratio

[Fe/H]

Distance
521.23 parsec
Light-years 1,700.03 ly
V-band magnitude
14.33 mag
Voyager-speed travel 29,980,075 yr

Multi-band Host Photometry — 11 bands

9.015.115.14B14.33V14.09Gaia13.55TESS12.82J12.42H12.32K12.29W112.33W212.14W39.03W4

Astrometric Data

Parallax

1.890 mas

Total Proper Motion

7.933 mas/yr

PM Right Ascension

5.17 mas/yr

PM Declination

6.01 mas/yr

Galactic Cartesian (pc)

x = 0.472 · y = -0.617 · z = -0.630

Equatorial (J2000)

RA 307.41830° · Dec -39.03236°

Galactic ℓ, b

2.607° · -35.064°

Ecliptic λ, β

300.026° · -19.414°

HTM-20 index

355831039

Similar Worlds

TOI-1259 A b

Gas Giant · K-type orange

Radius 11.46 R⊕ · 385.2 ly

TOI-2384 b

Gas Giant · K-type orange

Radius 11.49 R⊕ · 624.6 ly

TOI-7041 b

Gas Giant · K-type orange

Radius 11.43 R⊕ · 1,433.5 ly

OGLE-TR-111 b

Gas Giant · K-type orange

Radius 11.42 R⊕ · 3,484.4 ly

KPS-1 b

Gas Giant · K-type orange

Radius 11.55 R⊕ · 856.8 ly

WASP-91 b

Gas Giant · K-type orange

Radius 11.55 R⊕ · 489.0 ly

Explore Related Categories

Gas Giant Planets Transit Discoveries Next-Generation Transit Survey (NGTS) Mission K-type orange Hosts