Key parameters at a glance
- A radius of 15.24 Earth radii
- A mass of 473.57 Earth masses
- Surface gravity around 2.04 g
- An orbital period of 2.471 days
- Semi-major axis 0.0357 AU
- Equilibrium temperature 1,466 K (1193 °C)
- Distance from Earth 702.28 light-years
- Earth Similarity Index 0.090
- Travel time at Voyager 1 speed 12,384,691 years
TrES-2 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#213of 1771
top 12.0%
This planet
15.24R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TrES-2 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.24 | 11.21 |
| Mass (M⊕) | 1.00 | 473.57 | 317.83 |
| Density (g/cm³) | 5.51 | 0.88 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.04 | 2.53 |
| Insolation (S⊕) | 1.00 | 903.86 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 473.567 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 399860444
Gaia DR2
Gaia DR2 2131314401800665344
Gaia DR3
Gaia DR3 2131314401800665344
System
TrES-2
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.47 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0357 AU.
Transit Fingerprint
Depth
1.600 %
Duration
1.743 h
Impact parameter b
0.843
Rp / R★
0.125358
Transit midpoint (BJD)
2,454,955.7634
Photometric dip
Transit produces a flux drop of 16,000 ppm lasting ≈ 1.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.125358
Semi-major axis / stellar radius
7.640
Impact parameter (b)
0.843
RV semi-amplitude (K)
181.300 m/s
Occultation depth
0.001 ppm
Transit mid-time (BJD)
2,454,955.7634
Long. of periastron (ω)
24.00°
Sky-projected obliquity (λ)
-9.00°
Angular separation (arcsec)
0.16600
Eq. Temperature
1,466K
(1193 °C)
Insolation (S⊕)
903.86
Earth = 1.00
Earth Similarity (ESI)
0.090
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.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
O Donovan et al. 2006Instrument
2K CCD Sensor
Publication
2006-11
Observation locale
Ground
Host System: TrES-2
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,850 K — hotter than the Sun (5,778 K)
Estimated Age
3.55 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.120 R☉
Stellar Mass
1.360 M☉
Metallicity [Fe/H]
-0.15
Extended Stellar Properties
Surface gravity (log g)
4.430 dex
Stellar density
1.380 g/cm³
Systemic radial velocity
-0.73 km/s
Rotational v·sin i
1.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
4.615 mas
Total Proper Motion
5.464 mas/yr
PM Right Ascension
5.22 mas/yr
PM Declination
1.62 mas/yr
Galactic Cartesian (pc)
x = 0.189 · y = -0.624 · z = 0.758
Equatorial (J2000)
RA 286.80853° · Dec 49.31642°
Galactic ℓ, b
79.849° · 17.808°
Ecliptic λ, β
304.829° · 70.730°
HTM-20 index
673709352
Observation Record
Photometric series
45
RV measurements
4
Transmission spectra
2
Emission spectra
5
Archive notes
9
Similar Worlds
WASP-149 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.24 R⊕ · 690.6 ly
TOI-2818 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.28 R⊕ · 1,019.8 ly
HAT-P-23 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.33 R⊕ · 1,189.9 ly
WASP-123 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.13 R⊕ · 645.8 ly
KELT-11 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.13 R⊕ · 323.4 ly
WASP-4 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.12 R⊕ · 871.5 ly