Key parameters at a glance
- A radius of 8.56 Earth radii
- A mass of 54.98 Earth masses
- Surface gravity around 0.75 g
- An orbital period of 1,211.000 days
- Semi-major axis 2.1080 AU
- Distance from Earth 58.47 light-years
- Earth Similarity Index 0.339
- Travel time at Voyager 1 speed 1,031,061 years
HD 3765 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#118of 574
top 20.4%
This planet
8.56R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | HD 3765 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 8.56 | 11.21 |
| Mass (M⊕) | 1.00 | 54.98 | 317.83 |
| Density (g/cm³) | 5.51 | 0.48 | 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) | 54.984 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 3765
HIP
HIP 3206
TIC
TIC 424009747
Gaia DR2
Gaia DR2 369092520004831232
Gaia DR3
Gaia DR3 369092520004831232
System
HD 3765
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 3.32 Earth years on a mildly elliptical path at a mean orbital distance of 2.1080 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
3.850 m/s
Transit mid-time (BJD)
2,455,607.0000
Long. of periastron (ω)
-63.03°
Angular separation (arcsec)
118.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.339
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Rosenthal et al. 2021Instrument
Multiple Instruments
Publication
2021-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2021 at Multiple Observatories (12 shown).
Host System: HD 3765
Spectral Class
K-type orange
Effective Temperature
5,050 K — cooler than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.831 R☉
Stellar Mass
0.852 M☉
Metallicity [Fe/H]
0.17
Extended Stellar Properties
Surface gravity (log g)
4.527 dex
Stellar density
2.336 g/cm³
Systemic radial velocity
-63.90 km/s
Rotational v·sin i
0.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 8 bands
Astrometric Data
Parallax
55.756 mas
Total Proper Motion
757.952 mas/yr
PM Right Ascension
356.31 mas/yr
PM Declination
-668.98 mas/yr
Galactic Cartesian (pc)
x = 0.752 · y = 0.135 · z = 0.645
Equatorial (J2000)
RA 10.20730° · Dec 40.18429°
Galactic ℓ, b
120.737° · -22.642°
Ecliptic λ, β
26.861° · 32.558°
HTM-20 index
-1136893966
Similar Worlds
HATS-49 b
Neptune-like · K-type orange
Radius 8.57 R⊕ · 1,058.1 ly
WASP-29 b
Neptune-like · K-type orange
Radius 8.63 R⊕ · 285.7 ly
Kepler-16 b
Neptune-like · K-type orange
Radius 8.45 R⊕ · 244.9 ly
TOI-2525 b
Neptune-like · K-type orange
Radius 8.68 R⊕ · 1,289.6 ly
Kepler-148 d
Neptune-like · K-type orange
Radius 8.68 R⊕ · 2,580.4 ly
WASP-59 b
Neptune-like · K-type orange
Radius 8.69 R⊕ · 378.1 ly