Key parameters at a glance
- A radius of 3.14 Earth radii
- A mass of 10.80 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 18.850 days
- Semi-major axis 0.1177 AU
- Equilibrium temperature 443 K (170 °C)
- Distance from Earth 130.68 light-years
- Earth Similarity Index 0.509
- Travel time at Voyager 1 speed 2,304,466 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-1759 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#400of 1978
top 20.2%
This planet
3.14R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1759 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.14 | 11.21 |
| Mass (M⊕) | 1.00 | 10.80 | 317.83 |
| Density (g/cm³) | 5.51 | 1.91 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.39 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 10.800 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 408636441
Gaia DR2
Gaia DR2 2216420110788943744
Gaia DR3
Gaia DR3 2216420110788943744
System
TOI-1759
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.85 Earth days (5.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1177 AU.
Transit Fingerprint
Depth
0.261 %
Duration
3.230 h
Impact parameter b
0.210
Rp / R★
0.048300
Transit midpoint (BJD)
2,458,745.4654
Photometric dip
Transit produces a flux drop of 2,610 ppm lasting ≈ 3.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.048300
Semi-major axis / stellar radius
36.000
Impact parameter (b)
0.210
RV semi-amplitude (K)
3.640 m/s
Transit mid-time (BJD)
2,458,745.4654
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
2.94000
Eq. Temperature
443K
(170 °C)
Insolation (S⊕)
6.39
Earth = 1.00
Earth Similarity (ESI)
0.509
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
Martioli et al. 2022Instrument
TESS CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1759
Spectral Class
M-type red dwarf
Effective Temperature
4,065 K — cooler than the Sun (5,778 K)
Estimated Age
5.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.597 R☉
Stellar Mass
0.606 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.650 dex
Stellar density
3.949 g/cm³
Rotational v·sin i
2.00 km/s
Rotation period
35.65 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
24.930 mas
Total Proper Motion
173.785 mas/yr
PM Right Ascension
-173.47 mas/yr
PM Declination
-10.46 mas/yr
Galactic Cartesian (pc)
x = 0.383 · y = -0.250 · z = 0.889
Equatorial (J2000)
RA 326.85166° · Dec 62.75382°
Galactic ℓ, b
103.550° · 7.030°
Ecliptic λ, β
17.917° · 66.243°
HTM-20 index
853988895
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