Key parameters at a glance
- A radius of 16.69 Earth radii
- A mass of 387.75 Earth masses
- Surface gravity around 1.39 g
- An orbital period of 4.231 days
- Semi-major axis 0.0580 AU
- Equilibrium temperature 1,669 K (1396 °C)
- Distance from Earth 1,342.85 light-years
- Earth Similarity Index 0.068
- Travel time at Voyager 1 speed 23,681,092 years
TOI-163 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#125of 1771
top 7.0%
This planet
16.69R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-163 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.69 | 11.21 |
| Mass (M⊕) | 1.00 | 387.75 | 317.83 |
| Density (g/cm³) | 5.51 | 0.49 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.39 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,489.11 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 387.753 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 271181
TIC
TIC 179317684
Gaia DR2
Gaia DR2 4651366259202463104
Gaia DR3
Gaia DR3 4651366263526130816
System
TOI-163
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.23 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0580 AU.
Transit Fingerprint
Depth
0.726 %
Duration
4.930 h
Impact parameter b
0.365
Rp / R★
0.090820
Transit midpoint (BJD)
2,458,328.8797
Photometric dip
Transit produces a flux drop of 7,261 ppm lasting ≈ 4.93 h.
Extended Orbital Architecture
Planet / star radius ratio
0.090820
Semi-major axis / stellar radius
7.570
Impact parameter (b)
0.365
RV semi-amplitude (K)
120.000 m/s
Transit mid-time (BJD)
2,458,328.8797
Angular separation (arcsec)
0.14100
Eq. Temperature
1,669K
(1396 °C)
Insolation (S⊕)
1,489.11
Earth = 1.00
Earth Similarity (ESI)
0.068
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
Kossakowski et al. 2019Instrument
TESS CCD Array
Publication
2019-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2019 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-163
Spectral Class
F-type yellow-white
Effective Temperature
6,495 K — hotter than the Sun (5,778 K)
Estimated Age
1.82 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.648 R☉
Stellar Mass
1.435 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
4.187 dex
Stellar density
0.452 g/cm³
Systemic radial velocity
22.74 km/s
Rotational v·sin i
14.08 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.401 mas
Total Proper Motion
17.863 mas/yr
PM Right Ascension
7.14 mas/yr
PM Declination
16.37 mas/yr
Galactic Cartesian (pc)
x = 0.055 · y = 0.306 · z = -0.950
Equatorial (J2000)
RA 79.76825° · Dec -71.89553°
Galactic ℓ, b
283.048° · -32.811°
Ecliptic λ, β
299.510° · -83.567°
HTM-20 index
1463536659
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