Key parameters at a glance
- A radius of 3.93 Earth radii
- A mass of 10.20 Earth masses
- Surface gravity around 0.66 g
- An orbital period of 16.365 days
- Semi-major axis 0.1168 AU
- Equilibrium temperature 714 K (441 °C)
- Distance from Earth 403.58 light-years
- Earth Similarity Index 0.277
- Travel time at Voyager 1 speed 7,117,171 years
2 siblings around TOI-451
TOI-451 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
TOI-451 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#15of 1978
top 0.7%
This planet
3.93R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-451 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.93 | 11.21 |
| Mass (M⊕) | 1.00 | 10.20 | 317.83 |
| Density (g/cm³) | 5.51 | 0.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.66 | 2.53 |
| Insolation (S⊕) | 1.00 | 43.20 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 10.200 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 257605131
Gaia DR2
Gaia DR2 4844691297067063424
Gaia DR3
Gaia DR3 4844691297067063424
System
TOI-451
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.36 Earth days (4.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1168 AU.
Transit Fingerprint
Depth
0.180 %
Duration
4.094 h
Impact parameter b
0.382
Rp / R★
0.042430
Transit midpoint (BJD)
2,460,314.9694
Photometric dip
Transit produces a flux drop of 1,803 ppm lasting ≈ 4.09 h.
Extended Orbital Architecture
Planet / star radius ratio
0.042430
Semi-major axis / stellar radius
29.600
Impact parameter (b)
0.382
RV semi-amplitude (K)
2.700 m/s
Transit mid-time (BJD)
2,460,314.9694
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.94400
Eq. Temperature
714K
(441 °C)
Insolation (S⊕)
43.20
Earth = 1.00
Earth Similarity (ESI)
0.277
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Newton et al. 2021Instrument
TESS CCD Array
Publication
2021-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-451
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,490 K — cooler than the Sun (5,778 K)
Estimated Age
0.12 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.850 R☉
Stellar Mass
0.930 M☉
Metallicity [Fe/H]
0.02
Extended Stellar Properties
Surface gravity (log g)
4.530 dex
Stellar density
1.840 g/cm³
Systemic radial velocity
19.87 km/s
Rotational v·sin i
8.70 km/s
Rotation period
5.10 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.053 mas
Total Proper Motion
16.668 mas/yr
PM Right Ascension
-11.17 mas/yr
PM Declination
12.37 mas/yr
Galactic Cartesian (pc)
x = 0.358 · y = 0.702 · z = -0.615
Equatorial (J2000)
RA 62.96639° · Dec -37.93973°
Galactic ℓ, b
240.548° · -46.930°
Ecliptic λ, β
48.128° · -57.515°
HTM-20 index
1709022690
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Kepler-1719 b
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