Key parameters at a glance
- A radius of 2.48 Earth radii
- A mass of 16.60 Earth masses
- Surface gravity around 2.70 g
- An orbital period of 5.385 days
- Semi-major axis 0.0590 AU
- Equilibrium temperature 1,005 K (732 °C)
- Distance from Earth 739.30 light-years
- Earth Similarity Index 0.267
- Travel time at Voyager 1 speed 13,037,574 years
TOI-1753 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1223of 1978
top 61.8%
This planet
2.48R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1753 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.48 | 11.21 |
| Mass (M⊕) | 1.00 | 16.60 | 317.83 |
| Density (g/cm³) | 5.51 | 5.95 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.70 | 2.53 |
| Insolation (S⊕) | 1.00 | 238.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 16.600 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 289580577
Gaia DR2
Gaia DR2 1630385631560004480
Gaia DR3
Gaia DR3 1630385635856016256
System
TOI-1753
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.38 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0590 AU.
Transit Fingerprint
Depth
0.063 %
Duration
3.178 h
Impact parameter b
0.271
Rp / R★
0.023390
Transit midpoint (BJD)
2,458,684.5030
Photometric dip
Transit produces a flux drop of 631 ppm lasting ≈ 3.18 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023390
Impact parameter (b)
0.271
RV semi-amplitude (K)
6.000 m/s
Transit mid-time (BJD)
2,458,684.5030
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.26000
Eq. Temperature
1,005K
(732 °C)
Insolation (S⊕)
238.00
Earth = 1.00
Earth Similarity (ESI)
0.267
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
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-1753
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,621 K — cooler than the Sun (5,778 K)
Estimated Age
5.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.972 R☉
Stellar Mass
0.948 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.438 dex
Stellar density
1.445 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.384 mas
Total Proper Motion
12.647 mas/yr
PM Right Ascension
-1.58 mas/yr
PM Declination
12.55 mas/yr
Galactic Cartesian (pc)
x = -0.145 · y = -0.460 · z = 0.876
Equatorial (J2000)
RA 252.46984° · Dec 61.17358°
Galactic ℓ, b
91.043° · 38.065°
Ecliptic λ, β
206.790° · 80.637°
HTM-20 index
-1651760954
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