Key parameters at a glance
- A radius of 1.99 Earth radii
- A mass of 5.72 Earth masses
- Surface gravity around 1.44 g
- An orbital period of 4.885 days
- Semi-major axis 0.0618 AU
- Equilibrium temperature 1,056 K (783 °C)
- Distance from Earth 245.30 light-years
- Earth Similarity Index 0.262
- Travel time at Voyager 1 speed 4,325,853 years
TOI-733 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#2of 1176
top 0.1%
This planet
1.99R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-733 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.99 | 11.21 |
| Mass (M⊕) | 1.00 | 5.72 | 317.83 |
| Density (g/cm³) | 5.51 | 3.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.44 | 2.53 |
| Insolation (S⊕) | 1.00 | 207.10 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 5.720 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 106402532
Gaia DR2
Gaia DR2 5392409372314518656
Gaia DR3
Gaia DR3 5392409372314518656
System
TOI-733
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.88 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0618 AU.
Transit Fingerprint
Depth
0.048 %
Duration
2.610 h
Impact parameter b
0.290
Rp / R★
0.019250
Transit midpoint (BJD)
2,458,545.7767
Photometric dip
Transit produces a flux drop of 478 ppm lasting ≈ 2.61 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019250
Semi-major axis / stellar radius
14.000
Impact parameter (b)
0.290
RV semi-amplitude (K)
2.230 m/s
Transit mid-time (BJD)
2,458,545.7767
Long. of periastron (ω)
-53.20°
Angular separation (arcsec)
0.82200
Eq. Temperature
1,056K
(783 °C)
Insolation (S⊕)
207.10
Earth = 1.00
Earth Similarity (ESI)
0.262
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
Georgieva et al. 2023Instrument
TESS CCD Array
Publication
2023-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-733
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,585 K — cooler than the Sun (5,778 K)
Estimated Age
4.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.949 R☉
Stellar Mass
0.956 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.470 dex
Stellar density
1.580 g/cm³
Rotational v·sin i
2.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
13.267 mas
Total Proper Motion
33.659 mas/yr
PM Right Ascension
27.54 mas/yr
PM Declination
19.35 mas/yr
Galactic Cartesian (pc)
x = -0.708 · y = 0.266 · z = -0.655
Equatorial (J2000)
RA 159.40932° · Dec -40.88826°
Galactic ℓ, b
277.344° · 15.242°
Ecliptic λ, β
181.327° · -44.937°
HTM-20 index
-1606586472
Similar Worlds
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Super-Earth · G-type yellow (Sun-like)
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Radius 1.99 R⊕ · 3,720.0 ly
Kepler-181 c
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Kepler-1457 b
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Kepler-142 b
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Kepler-625 b
Super-Earth · G-type yellow (Sun-like)
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