Key parameters at a glance
- A radius of 9.92 Earth radii
- A mass of 58.80 Earth masses
- Surface gravity around 0.60 g
- An orbital period of 8.028 days
- Semi-major axis 0.0815 AU
- Equilibrium temperature 1,171 K (898 °C)
- Distance from Earth 371.97 light-years
- Earth Similarity Index 0.089
- Travel time at Voyager 1 speed 6,559,768 years
TOI-1135 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#8of 574
top 1.2%
This planet
9.92R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-1135 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 9.92 | 11.21 |
| Mass (M⊕) | 1.00 | 58.80 | 317.83 |
| Density (g/cm³) | 5.51 | 0.15 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.60 | 2.53 |
| Insolation (S⊕) | 1.00 | 310.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 58.798 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HIP
HIP 62908
TIC
TIC 154872375
Gaia DR2
Gaia DR2 1726858366624544640
Gaia DR3
Gaia DR3 1726858366624544640
System
TOI-1135
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.03 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0815 AU.
Transit Fingerprint
Depth
0.571 %
Duration
4.462 h
Impact parameter b
0.176
Rp / R★
0.075660
Transit midpoint (BJD)
2,460,466.3079
Photometric dip
Transit produces a flux drop of 5,705 ppm lasting ≈ 4.46 h.
Extended Orbital Architecture
Planet / star radius ratio
0.075660
Semi-major axis / stellar radius
14.570
Impact parameter (b)
0.176
RV semi-amplitude (K)
8.000 m/s
Transit mid-time (BJD)
2,460,466.3079
Long. of periastron (ω)
-10.00°
Sky-projected obliquity (λ)
-68.10°
True obliquity (ψ)
72.20°
Angular separation (arcsec)
0.71500
Eq. Temperature
1,171K
(898 °C)
Insolation (S⊕)
310.00
Earth = 1.00
Earth Similarity (ESI)
0.089
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Discovery Paper
Primary reference
Mallorqu Iacute N et al. 2024Instrument
TESS CCD Array
Publication
2024-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1135
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
6,320 K — hotter than the Sun (5,778 K)
Estimated Age
3.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.202 R☉
Stellar Mass
1.119 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.328 dex
Stellar density
0.908 g/cm³
Systemic radial velocity
-20.90 km/s
Rotational v·sin i
10.90 km/s
Rotation period
4.34 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.739 mas
Total Proper Motion
17.629 mas/yr
PM Right Ascension
16.88 mas/yr
PM Declination
5.08 mas/yr
Galactic Cartesian (pc)
x = -0.083 · y = -0.020 · z = 0.996
Equatorial (J2000)
RA 193.39637° · Dec 85.12950°
Galactic ℓ, b
122.878° · 31.999°
Ecliptic λ, β
102.312° · 67.219°
HTM-20 index
-1948782772
Similar Worlds
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TOI-2328 b
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TOI-2416 b
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WASP-130 b
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Kepler-424 b
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