Key parameters at a glance
- A radius of 10.10 Earth radii
- A mass of 177.98 Earth masses
- Surface gravity around 1.74 g
- An orbital period of 34.526 days
- Semi-major axis 0.2069 AU
- Equilibrium temperature 497 K (224 °C)
- Distance from Earth 580.38 light-years
- Earth Similarity Index 0.295
- Travel time at Voyager 1 speed 10,234,971 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-216
TOI-216.01 shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-216.02 | Neptune-like | 8.00 | 18.75 | 17.161 | 628 | 2019 |
| TOI-216.01 this | Gas Giant | 10.10 | 177.98 | 34.526 | 497 | 2019 |
TOI-216.01 Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1759of 1771
top 99.3%
This planet
10.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-216.01 | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.10 | 11.21 |
| Mass (M⊕) | 1.00 | 177.98 | 317.83 |
| Density (g/cm³) | 5.51 | 0.76 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.74 | 2.53 |
| Insolation (S⊕) | 1.00 | 10.10 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 177.984 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 55652896
Gaia DR2
Gaia DR2 4664811297844004352
Gaia DR3
Gaia DR3 4664811297844004352
System
TOI-216
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 34.53 Earth days (9.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2069 AU.
Transit Fingerprint
Depth
1.831 %
Duration
3.821 h
Impact parameter b
0.140
Rp / R★
0.123000
Transit midpoint (BJD)
2,458,331.4110
Photometric dip
Transit produces a flux drop of 18,310 ppm lasting ≈ 3.82 h.
Extended Orbital Architecture
Planet / star radius ratio
0.123000
Semi-major axis / stellar radius
55.070
Impact parameter (b)
0.140
Transit mid-time (BJD)
2,458,331.4110
Long. of periastron (ω)
190.00°
Angular separation (arcsec)
1.16000
Eq. Temperature
497K
(224 °C)
Insolation (S⊕)
10.10
Earth = 1.00
Earth Similarity (ESI)
0.295
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.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Kipping et al. 2019Instrument
TESS CCD Array
Publication
2019-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2019 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-216
Spectral Class
K-type orange
Effective Temperature
5,026 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.748 R☉
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
0.32
Extended Stellar Properties
Surface gravity (log g)
4.660 dex
Stellar density
2.380 g/cm³
Systemic radial velocity
36.30 km/s
Rotational v·sin i
0.84 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.591 mas
Total Proper Motion
60.752 mas/yr
PM Right Ascension
-22.70 mas/yr
PM Declination
-56.35 mas/yr
Galactic Cartesian (pc)
x = 0.124 · y = 0.432 · z = -0.893
Equatorial (J2000)
RA 73.98001° · Dec -63.26033°
Galactic ℓ, b
273.409° · -36.914°
Ecliptic λ, β
18.493° · -82.476°
HTM-20 index
-812688575
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