Key parameters at a glance
- A radius of 18.49 Earth radii
- A mass of 3,727.81 Earth masses
- Surface gravity around 10.90 g
- An orbital period of 8,617.510 days
- Semi-major axis 10.0180 AU
- Equilibrium temperature 1,612 K (1339 °C)
- Distance from Earth 64.40 light-years
- Earth Similarity Index 0.089
- Travel time at Voyager 1 speed 1,135,639 years
1 sibling around bet Pic
bet Pic 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 |
|---|---|---|---|---|---|---|
| bet Pic c | Gas Giant | 12.50 | 3,222.46 | 1,192.780 | 1,250 | 2019 |
| bet Pic b this | Gas Giant | 18.49 | 3,727.81 | 8,617.510 | 1,612 | 2008 |
bet Pic b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#53of 1771
top 2.9%
This planet
18.49R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | bet Pic b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 18.49 | 11.21 |
| Mass (M⊕) | 1.00 | 3,727.81 | 317.83 |
| Density (g/cm³) | 5.51 | 3.24 | 1.33 |
| Surface Gravity (g) | 1.00 | 10.90 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3,727.809 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 39060
HIP
HIP 27321
TIC
TIC 270577175
Gaia DR2
Gaia DR2 4792774797545105664
Gaia DR3
Gaia DR3 4792774797545800832
System
bet Pic
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 23.59 Earth years on a mildly elliptical path at a mean orbital distance of 10.0180 AU.
Eq. Temperature
1,612K
(1339 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.089
0 = alien, 1 = Earth-identical
Insufficient insolation data — the dayside is scorched.
Detection Signatures
Astrometry
Positional wobble of the host star was measured.
Direct imaging
The planet has been imaged directly (rare).
Discovery Paper
Primary reference
Lagrange et al. 2009Instrument
NACO Camera
Publication
2009-01
Observation locale
Ground
Host System: bet Pic
Spectral Class
A-type white
Effective Temperature
8,039 K — hotter than the Sun (5,778 K)
Estimated Age
0.02 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.544 R☉
Stellar Mass
1.795 M☉
Metallicity [Fe/H]
-0.21
Extended Stellar Properties
Surface gravity (log g)
4.351 dex
Stellar density
0.747 g/cm³
Rotational v·sin i
116.41 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
50.623 mas
Total Proper Motion
82.615 mas/yr
PM Right Ascension
2.49 mas/yr
PM Declination
82.58 mas/yr
Galactic Cartesian (pc)
x = 0.035 · y = 0.627 · z = -0.778
Equatorial (J2000)
RA 86.82123° · Dec -51.06615°
Galactic ℓ, b
258.363° · -30.612°
Ecliptic λ, β
82.540° · -74.423°
HTM-20 index
2143792867
Similar Worlds
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Gas Giant · A-type white
Radius 18.15 R⊕ · 325.3 ly
MASCARA-1 b
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WASP-33 b
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KELT-21 b
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HAT-P-57 b
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KELT-20 b
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Radius 19.51 R⊕ · 445.0 ly