Key parameters at a glance
- A radius of 13.42 Earth radii
- A mass of 1,058.37 Earth masses
- Surface gravity around 5.88 g
- An orbital period of 5.453 days
- Semi-major axis 0.0677 AU
- Equilibrium temperature 1,520 K (1247 °C)
- Distance from Earth 813.19 light-years
- Earth Similarity Index 0.102
- Travel time at Voyager 1 speed 14,340,577 years
HAT-P-34 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#729of 1771
top 41.1%
This planet
13.42R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-34 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.42 | 11.21 |
| Mass (M⊕) | 1.00 | 1,058.37 | 317.83 |
| Density (g/cm³) | 5.51 | 2.50 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.88 | 2.53 |
| Insolation (S⊕) | 1.00 | 433.78 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,058.374 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 351766
TIC
TIC 278348461
Gaia DR2
Gaia DR2 1810218734055374720
Gaia DR3
Gaia DR3 1810218734058821632
System
HAT-P-34
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.45 Earth days (1.5% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0677 AU.
Transit Fingerprint
Depth
0.775 %
Duration
3.175 h
Impact parameter b
0.126
Rp / R★
0.081800
Transit midpoint (BJD)
2,455,431.5971
Photometric dip
Transit produces a flux drop of 7,750 ppm lasting ≈ 3.18 h.
Extended Orbital Architecture
Planet / star radius ratio
0.081800
Semi-major axis / stellar radius
9.860
Impact parameter (b)
0.126
RV semi-amplitude (K)
343.000 m/s
Transit mid-time (BJD)
2,455,431.5971
Long. of periastron (ω)
21.90°
Sky-projected obliquity (λ)
0.00°
Angular separation (arcsec)
0.27200
Eq. Temperature
1,520K
(1247 °C)
Insolation (S⊕)
433.78
Earth = 1.00
Earth Similarity (ESI)
0.102
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
Bakos et al. 2012Instrument
2K CCD Sensor
Publication
2012-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2011 at HATNet (10 shown).
Host System: HAT-P-34
Spectral Class
F-type yellow-white
Effective Temperature
6,442 K — hotter than the Sun (5,778 K)
Estimated Age
1.70 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.530 R☉
Stellar Mass
1.392 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
4.210 dex
Stellar density
0.505 g/cm³
Systemic radial velocity
-49.26 km/s
Rotational v·sin i
24.00 km/s
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.983 mas
Total Proper Motion
20.885 mas/yr
PM Right Ascension
16.39 mas/yr
PM Declination
-12.94 mas/yr
Galactic Cartesian (pc)
x = 0.520 · y = -0.795 · z = 0.311
Equatorial (J2000)
RA 303.19544° · Dec 18.10478°
Galactic ℓ, b
58.541° · -8.759°
Ecliptic λ, β
310.644° · 36.977°
HTM-20 index
-1946607152
Similar Worlds
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