Key parameters at a glance
- A radius of 13.20 Earth radii
- A mass of 810.46 Earth masses
- Surface gravity around 4.65 g
- An orbital period of 5,823.000 days
- Semi-major axis 6.7000 AU
- Distance from Earth 115.00 light-years
- Earth Similarity Index 0.386
- Travel time at Voyager 1 speed 2,028,071 years
2 siblings around HD 73344
HD 73344 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 73344 b | Sub-Neptune | 2.88 | 10.48 | 15.611 | 911 | 2024 |
| HD 73344 c | Gas Giant | 13.50 | 118.55 | 65.940 | — | 2025 |
| HD 73344 d this | Gas Giant | 13.20 | 810.46 | 5,823.000 | — | 2025 |
HD 73344 d Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#847of 1771
top 47.8%
This planet
13.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 73344 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.20 | 11.21 |
| Mass (M⊕) | 1.00 | 810.46 | 317.83 |
| Density (g/cm³) | 5.51 | 1.94 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.65 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 810.462 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 702.401 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 73344
HIP
HIP 42403
TIC
TIC 175193677
Gaia DR2
Gaia DR2 666427539629086976
Gaia DR3
Gaia DR3 666427539629086976
System
HD 73344
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 15.94 Earth years on a mildly elliptical path at a mean orbital distance of 6.7000 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
22.700 m/s
Transit mid-time (BJD)
2,444,345.0000
Long. of periastron (ω)
58.90°
Angular separation (arcsec)
190.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.386
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Zhang et al. 2024Instrument
Multiple Instruments
Publication
2024-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2025 at Multiple Observatories (12 shown).
Host System: HD 73344
Spectral Class
F-type yellow-white
Effective Temperature
6,148 K — hotter than the Sun (5,778 K)
Estimated Age
1.15 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.220 R☉
Stellar Mass
1.190 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.360 dex
Stellar density
1.014 g/cm³
Systemic radial velocity
5.80 km/s
Rotational v·sin i
5.67 km/s
Rotation period
9.03 days
Activity index (log R'HK)
-4.600
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
28.332 mas
Total Proper Motion
156.117 mas/yr
PM Right Ascension
-47.30 mas/yr
PM Declination
-148.78 mas/yr
Galactic Cartesian (pc)
x = -0.585 · y = 0.705 · z = 0.402
Equatorial (J2000)
RA 129.68945° · Dec 23.68527°
Galactic ℓ, b
201.244° · 33.438°
Ecliptic λ, β
125.949° · 5.063°
HTM-20 index
-463656631
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