Key parameters at a glance
- A radius of 13.11 Earth radii
- A mass of 279.69 Earth masses
- Surface gravity around 1.63 g
- An orbital period of 5.723 days
- Semi-major axis 0.0667 AU
- Equilibrium temperature 1,281 K (1008 °C)
- Distance from Earth 1,022.75 light-years
- Earth Similarity Index 0.105
- Travel time at Voyager 1 speed 18,036,141 years
HAT-P-29 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#905of 1771
top 51.0%
This planet
13.11R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-29 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.11 | 11.21 |
| Mass (M⊕) | 1.00 | 279.69 | 317.83 |
| Density (g/cm³) | 5.51 | 0.71 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.63 | 2.53 |
| Insolation (S⊕) | 1.00 | 433.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 279.690 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 243.776 M⊕ | Lower bound from radial-velocity fitting. |
| Computed mass | 243.926 M⊕ | Model-computed mass (e.g. from mass-radius relation). |
Star Catalogue Identifiers
TIC
TIC 250707118
Gaia DR2
Gaia DR2 359058441314838528
Gaia DR3
Gaia DR3 359058441314838528
System
HAT-P-29
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.72 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0667 AU.
Transit Fingerprint
Depth
0.860 %
Duration
3.893 h
Impact parameter b
0.591
Rp / R★
0.087770
Transit midpoint (BJD)
2,456,210.6154
Photometric dip
Transit produces a flux drop of 8,600 ppm lasting ≈ 3.89 h.
Extended Orbital Architecture
Planet / star radius ratio
0.087770
Semi-major axis / stellar radius
11.740
Impact parameter (b)
0.591
RV semi-amplitude (K)
78.300 m/s
Transit mid-time (BJD)
2,456,210.6154
Long. of periastron (ω)
159.00°
Sky-projected obliquity (λ)
-26.00°
Angular separation (arcsec)
0.21300
Eq. Temperature
1,281K
(1008 °C)
Insolation (S⊕)
433.00
Earth = 1.00
Earth Similarity (ESI)
0.105
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
Buchhave et al. 2011Instrument
2K CCD Sensor
Publication
2011-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2011 at HATNet (10 shown).
Host System: HAT-P-29
Spectral Class
F-type yellow-white
Effective Temperature
6,087 K — hotter than the Sun (5,778 K)
Estimated Age
2.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.300 R☉
Stellar Mass
1.450 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.340 dex
Stellar density
0.930 g/cm³
Systemic radial velocity
-21.65 km/s
Rotational v·sin i
3.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.161 mas
Total Proper Motion
9.987 mas/yr
PM Right Ascension
-9.80 mas/yr
PM Declination
1.90 mas/yr
Galactic Cartesian (pc)
x = 0.518 · y = 0.338 · z = 0.786
Equatorial (J2000)
RA 33.13109° · Dec 51.77878°
Galactic ℓ, b
135.471° · -9.108°
Ecliptic λ, β
50.237° · 35.894°
HTM-20 index
-1230488488
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