Key parameters at a glance
- A radius of 5.82 Earth radii
- A mass of 61.50 Earth masses
- Surface gravity around 1.82 g
- An orbital period of 2.327 days
- Semi-major axis 0.0296 AU
- Equilibrium temperature 867 K (594 °C)
- Distance from Earth 440.46 light-years
- Earth Similarity Index 0.229
- Travel time at Voyager 1 speed 7,767,580 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-532 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#298of 574
top 51.7%
This planet
5.82R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-532 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.82 | 11.21 |
| Mass (M⊕) | 1.00 | 61.50 | 317.83 |
| Density (g/cm³) | 5.51 | 1.72 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.82 | 2.53 |
| Insolation (S⊕) | 1.00 | 94.10 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 61.500 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 144700903
Gaia DR2
Gaia DR2 3340265717587057536
Gaia DR3
Gaia DR3 3340265717587057536
System
TOI-532
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.33 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0296 AU.
Transit Fingerprint
Depth
0.784 %
Duration
1.750 h
Rp / R★
0.087700
Transit midpoint (BJD)
2,458,470.5768
Photometric dip
Transit produces a flux drop of 7,845 ppm lasting ≈ 1.75 h.
Extended Orbital Architecture
Planet / star radius ratio
0.087700
Semi-major axis / stellar radius
10.490
RV semi-amplitude (K)
39.820 m/s
Transit mid-time (BJD)
2,458,470.5768
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.21900
Eq. Temperature
867K
(594 °C)
Insolation (S⊕)
94.10
Earth = 1.00
Earth Similarity (ESI)
0.229
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
Kanodia et al. 2021Instrument
TESS CCD Array
Publication
2021-10
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-532
Spectral Class
K-type orange
Effective Temperature
3,927 K — cooler than the Sun (5,778 K)
Estimated Age
7.10 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.612 R☉
Stellar Mass
0.639 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.669 dex
Stellar density
3.920 g/cm³
Systemic radial velocity
9.67 km/s
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.376 mas
Total Proper Motion
44.695 mas/yr
PM Right Ascension
23.37 mas/yr
PM Declination
-38.10 mas/yr
Galactic Cartesian (pc)
x = 0.084 · y = 0.976 · z = 0.200
Equatorial (J2000)
RA 85.08005° · Dec 11.56264°
Galactic ℓ, b
194.286° · -10.070°
Ecliptic λ, β
85.072° · -11.793°
HTM-20 index
-2032963407
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