Key parameters at a glance
- A radius of 3.68 Earth radii
- A mass of 37.00 Earth masses
- Surface gravity around 2.73 g
- An orbital period of 124.730 days
- Semi-major axis 0.4720 AU
- Equilibrium temperature 300 K (27 °C)
- Distance from Earth 412.46 light-years
- Earth Similarity Index 0.639
- Travel time at Voyager 1 speed 7,273,677 years
TOI-2088 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#97of 1978
top 4.9%
This planet
3.68R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-2088 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.68 | 11.21 |
| Mass (M⊕) | 1.00 | 37.00 | 317.83 |
| Density (g/cm³) | 5.51 | 2.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.73 | 2.53 |
| Insolation (S⊕) | 1.00 | 1.73 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 37.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 441765914
Gaia DR2
Gaia DR2 1656835487573730048
Gaia DR3
Gaia DR3 1656835487573730048
System
TOI-2088
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 124.73 Earth days (34.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4720 AU.
Transit Fingerprint
Depth
0.178 %
Duration
7.362 h
Impact parameter b
0.359
Rp / R★
0.039812
Transit midpoint (BJD)
2,458,769.6066
Photometric dip
Transit produces a flux drop of 1,782 ppm lasting ≈ 7.36 h.
Extended Orbital Architecture
Planet / star radius ratio
0.039812
Impact parameter (b)
0.359
Transit mid-time (BJD)
2,458,769.6066
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
3.73000
Eq. Temperature
300K
(27 °C)
Insolation (S⊕)
1.73
Earth = 1.00
Earth Similarity (ESI)
0.639
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2088
Spectral Class
K-type orange
Effective Temperature
5,081 K — cooler than the Sun (5,778 K)
Estimated Age
4.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.848 R☉
Stellar Mass
0.903 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.533 dex
Stellar density
2.054 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.879 mas
Total Proper Motion
19.037 mas/yr
PM Right Ascension
-18.93 mas/yr
PM Declination
-1.97 mas/yr
Galactic Cartesian (pc)
x = -0.037 · y = -0.241 · z = 0.970
Equatorial (J2000)
RA 261.37489° · Dec 75.88228°
Galactic ℓ, b
107.503° · 31.448°
Ecliptic λ, β
102.532° · 80.298°
HTM-20 index
-963195588
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