Key parameters at a glance
- A radius of 12.50 Earth radii
- A mass of 2,828.67 Earth masses
- Surface gravity around 18.10 g
- An orbital period of 1,766.410 days
- Semi-major axis 2.8390 AU
- Distance from Earth 58.49 light-years
- Earth Similarity Index 0.398
- Travel time at Voyager 1 speed 1,031,423 years
1 sibling around 14 Her
14 Her b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| 14 Her b this | Gas Giant | 12.50 | 2,828.67 | 1,766.410 | — | 2002 |
| HD 145675 c | Gas Giant | 12.60 | 2,510.84 | 15,732.459 | — | 2021 |
14 Her b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1235of 1771
top 69.7%
This planet
12.50R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | 14 Her b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.50 | 11.21 |
| Mass (M⊕) | 1.00 | 2,828.67 | 317.83 |
| Density (g/cm³) | 5.51 | 7.96 | 1.33 |
| Surface Gravity (g) | 1.00 | 18.10 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,828.673 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,506.450 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 145675
HIP
HIP 79248
TIC
TIC 219483057
Gaia DR2
Gaia DR2 1385293808145621504
Gaia DR3
Gaia DR3 1385293808145621504
System
14 Her
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 4.84 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.8390 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
90.000 m/s
Transit mid-time (BJD)
2,456,834.4000
Long. of periastron (ω)
23.20°
Angular separation (arcsec)
158.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.398
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Butler et al. 2003Instrument
HIRES Spectrometer
Publication
2003-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2002 at W. M. Keck Observatory (7 shown).
Host System: 14 Her
Spectral Class
K-type orange
Effective Temperature
5,338 K — cooler than the Sun (5,778 K)
Estimated Age
4.60 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.930 R☉
Stellar Mass
0.970 M☉
Metallicity [Fe/H]
0.43
Extended Stellar Properties
Surface gravity (log g)
4.450 dex
Stellar density
1.274 g/cm³
Systemic radial velocity
-13.82 km/s
Rotational v·sin i
1.00 km/s
Activity index (log R'HK)
-5.060
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
55.736 mas
Total Proper Motion
324.530 mas/yr
PM Right Ascension
132.02 mas/yr
PM Declination
-296.46 mas/yr
Galactic Cartesian (pc)
x = -0.332 · y = -0.641 · z = 0.692
Equatorial (J2000)
RA 242.60210° · Dec 43.81636°
Galactic ℓ, b
69.168° · 46.944°
Ecliptic λ, β
223.247° · 62.879°
HTM-20 index
-1209154781
Observation Record
Photometric series
1
RV measurements
4
Stellar spectra
1
Archive notes
1
Similar Worlds
HD 38801 b
Gas Giant · K-type orange
Radius 12.50 R⊕ · 298.2 ly
HD 86065 b
Gas Giant · K-type orange
Radius 12.50 R⊕ · 131.7 ly
HD 115404 A c
Gas Giant · K-type orange
Radius 12.50 R⊕ · 35.8 ly
HD 94890 c
Gas Giant · K-type orange
Radius 12.50 R⊕ · 201.2 ly
BD-08 2823 c
Gas Giant · K-type orange
Radius 12.50 R⊕ · 134.8 ly
HD 164604 c
Gas Giant · K-type orange
Radius 12.50 R⊕ · 128.4 ly