Key parameters at a glance
- A radius of 14.68 Earth radii
- A mass of 1,341.56 Earth masses
- Surface gravity around 6.22 g
- An orbital period of 2.776 days
- Semi-major axis 0.0413 AU
- Equilibrium temperature 1,566 K (1293 °C)
- Distance from Earth 739.19 light-years
- Earth Similarity Index 0.096
- Travel time at Voyager 1 speed 13,035,618 years
HAT-P-16 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#261of 1771
top 14.7%
This planet
14.68R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-16 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.68 | 11.21 |
| Mass (M⊕) | 1.00 | 1,341.56 | 317.83 |
| Density (g/cm³) | 5.51 | 2.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 6.22 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,597.59 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,341.560 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 191284318
Gaia DR2
Gaia DR2 381592313648387200
Gaia DR3
Gaia DR3 381592313648387200
System
HAT-P-16
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.78 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0413 AU.
Transit Fingerprint
Depth
1.361 %
Duration
3.062 h
Impact parameter b
0.220
Rp / R★
0.106300
Transit midpoint (BJD)
2,455,027.6036
Photometric dip
Transit produces a flux drop of 13,613 ppm lasting ≈ 3.06 h.
Extended Orbital Architecture
Planet / star radius ratio
0.106300
Semi-major axis / stellar radius
7.730
Impact parameter (b)
0.220
RV semi-amplitude (K)
534.600 m/s
Transit mid-time (BJD)
2,455,027.6036
Long. of periastron (ω)
213.00°
Sky-projected obliquity (λ)
-10.00°
Angular separation (arcsec)
0.18200
Eq. Temperature
1,566K
(1293 °C)
Insolation (S⊕)
1,597.59
Earth = 1.00
Earth Similarity (ESI)
0.096
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. 2010Instrument
2K CCD Sensor
Publication
2010-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at HATNet (12 shown).
Host System: HAT-P-16
Spectral Class
F-type yellow-white
Effective Temperature
6,140 K — hotter than the Sun (5,778 K)
Estimated Age
0.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.158 R☉
Stellar Mass
1.218 M☉
Metallicity [Fe/H]
0.17
Extended Stellar Properties
Surface gravity (log g)
4.396 dex
Stellar density
1.105 g/cm³
Systemic radial velocity
-16.55 km/s
Rotational v·sin i
3.50 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.386 mas
Total Proper Motion
22.047 mas/yr
PM Right Ascension
-21.56 mas/yr
PM Declination
-4.59 mas/yr
Galactic Cartesian (pc)
x = 0.727 · y = 0.123 · z = 0.675
Equatorial (J2000)
RA 9.57303° · Dec 42.46310°
Galactic ℓ, b
120.347° · -20.343°
Ecliptic λ, β
27.646° · 34.792°
HTM-20 index
-1083890432
Observation Record
RV measurements
3
Transmission spectra
1
Emission spectra
2
Archive notes
2
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