Key parameters at a glance
- A radius of 10.90 Earth radii
- A mass of 152.00 Earth masses
- Surface gravity around 1.28 g
- An orbital period of 25.241 days
- Semi-major axis 0.1600 AU
- Equilibrium temperature 451 K (178 °C)
- Distance from Earth 597.12 light-years
- Earth Similarity Index 0.310
- Travel time at Voyager 1 speed 10,530,209 years
- Almost certainly tidally locked to its host star given the close orbit
NGTS-35 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1672of 1771
top 94.4%
This planet
10.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | NGTS-35 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.90 | 11.21 |
| Mass (M⊕) | 1.00 | 152.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.65 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.84 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 152.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 333736132
Gaia DR2
Gaia DR2 3531943236058701824
Gaia DR3
Gaia DR3 3531943236058701824
System
NGTS-35
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 25.24 Earth days (6.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1600 AU.
Transit Fingerprint
Depth
1.610 %
Duration
2.958 h
Impact parameter b
0.812
Rp / R★
0.131700
Transit midpoint (BJD)
2,459,334.0296
Photometric dip
Transit produces a flux drop of 16,103 ppm lasting ≈ 2.96 h.
Extended Orbital Architecture
Planet / star radius ratio
0.131700
Impact parameter (b)
0.812
RV semi-amplitude (K)
40.800 m/s
Transit mid-time (BJD)
2,459,334.0296
Long. of periastron (ω)
38.00°
Angular separation (arcsec)
0.87400
Eq. Temperature
451K
(178 °C)
Insolation (S⊕)
9.84
Earth = 1.00
Earth Similarity (ESI)
0.310
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Kendall et al. 2025Instrument
TESS CCD Array
Publication
2025-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: NGTS-35
Spectral Class
K-type orange
Effective Temperature
4,717 K — cooler than the Sun (5,778 K)
Estimated Age
1.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.753 R☉
Stellar Mass
0.789 M☉
Metallicity [Fe/H]
0.09
Extended Stellar Properties
Surface gravity (log g)
4.570 dex
Stellar density
2.459 g/cm³
Activity index (log R'HK)
-4.562
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.434 mas
Total Proper Motion
45.504 mas/yr
PM Right Ascension
-43.45 mas/yr
PM Declination
-13.51 mas/yr
Galactic Cartesian (pc)
x = -0.885 · y = 0.152 · z = -0.439
Equatorial (J2000)
RA 170.27634° · Dec -26.06662°
Galactic ℓ, b
278.779° · 32.534°
Ecliptic λ, β
182.298° · -27.614°
HTM-20 index
-494794073
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