Key parameters at a glance
- A radius of 17.26 Earth radii
- A mass of 201.50 Earth masses
- Surface gravity around 0.68 g
- An orbital period of 3.660 days
- Semi-major axis 0.0492 AU
- Equilibrium temperature 1,775 K (1502 °C)
- Distance from Earth 1,649.38 light-years
- Earth Similarity Index 0.054
- Travel time at Voyager 1 speed 29,086,827 years
TIC 257060897 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#101of 1771
top 5.6%
This planet
17.26R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TIC 257060897 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 17.26 | 11.21 |
| Mass (M⊕) | 1.00 | 201.50 | 317.83 |
| Density (g/cm³) | 5.51 | 0.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.68 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,804.55 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 201.503 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 257060897
Gaia DR2
Gaia DR2 1697129530714536320
Gaia DR3
Gaia DR3 1697129530714536320
System
TIC 257060897
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.66 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0492 AU.
Transit Fingerprint
Depth
0.785 %
Duration
4.742 h
Impact parameter b
0.556
Rp / R★
0.084990
Transit midpoint (BJD)
2,459,473.9454
Photometric dip
Transit produces a flux drop of 7,850 ppm lasting ≈ 4.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.084990
Semi-major axis / stellar radius
5.680
Impact parameter (b)
0.556
RV semi-amplitude (K)
74.100 m/s
Transit mid-time (BJD)
2,459,473.9454
Long. of periastron (ω)
-48.00°
Angular separation (arcsec)
0.09730
Eq. Temperature
1,775K
(1502 °C)
Insolation (S⊕)
1,804.55
Earth = 1.00
Earth Similarity (ESI)
0.054
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
Montalto et al. 2022Instrument
TESS CCD Array
Publication
2022-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TIC 257060897
Spectral Class
F-type yellow-white
Effective Temperature
5,993 K — hotter than the Sun (5,778 K)
Estimated Age
5.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.863 R☉
Stellar Mass
1.187 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
3.972 dex
Stellar density
0.259 g/cm³
Systemic radial velocity
-11.65 km/s
Rotational v·sin i
5.45 km/s
Rotation period
92.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.949 mas
Total Proper Motion
15.397 mas/yr
PM Right Ascension
13.27 mas/yr
PM Declination
-7.81 mas/yr
Galactic Cartesian (pc)
x = -0.201 · y = -0.219 · z = 0.955
Equatorial (J2000)
RA 227.53215° · Dec 72.71031°
Galactic ℓ, b
110.034° · 40.762°
Ecliptic λ, β
138.316° · 74.415°
HTM-20 index
139450995
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