Key parameters at a glance
- A radius of 14.30 Earth radii
- A mass of 152.56 Earth masses
- Surface gravity around 0.75 g
- An orbital period of 3.388 days
- Semi-major axis 0.0400 AU
- Equilibrium temperature 990 K (717 °C)
- Distance from Earth 147.75 light-years
- Earth Similarity Index 0.116
- Travel time at Voyager 1 speed 2,605,484 years
- Almost certainly tidally locked to its host star given the close orbit
HD 330075 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#301of 1771
top 16.9%
This planet
14.30R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 330075 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.30 | 11.21 |
| Mass (M⊕) | 1.00 | 152.56 | 317.83 |
| Density (g/cm³) | 5.51 | 0.29 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.75 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 152.558 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 330075
HIP
HIP 77517
TIC
TIC 275786473
Gaia DR2
Gaia DR2 5982775854377691136
Gaia DR3
Gaia DR3 5982775854377691136
System
HD 330075
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.39 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0400 AU.
Eq. Temperature
990K
(717 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.116
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Pepe et al. 2004Instrument
HARPS Spectrograph
Publication
2004-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2004 at La Silla Observatory (3 shown).
Host System: HD 330075
Spectral Class
K-type orange
Effective Temperature
5,000 K — cooler than the Sun (5,778 K)
Estimated Age
6.20 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.840 R☉
Stellar Mass
0.470 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
2.017 g/cm³
Systemic radial velocity
61.28 km/s
Rotational v·sin i
0.70 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
22.047 mas
Total Proper Motion
250.481 mas/yr
PM Right Ascension
-232.76 mas/yr
PM Declination
-92.54 mas/yr
Galactic Cartesian (pc)
x = -0.347 · y = -0.542 · z = -0.766
Equatorial (J2000)
RA 237.40550° · Dec -49.96392°
Galactic ℓ, b
329.806° · 3.376°
Ecliptic λ, β
246.623° · -29.136°
HTM-20 index
-72371238
Observation Record
Photometric series
1
RV measurements
1
Archive notes
1
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