Key parameters at a glance
- A radius of 12.60 Earth radii
- A mass of 2,351.93 Earth masses
- Surface gravity around 14.81 g
- An orbital period of 778.510 days
- Semi-major axis 1.8140 AU
- Distance from Earth 295.32 light-years
- Earth Similarity Index 0.424
- Travel time at Voyager 1 speed 5,207,909 years
Context from the literature
HD 48265 b is an extrasolar planet located approximately 293 light-years away in the constellation of Puppis, orbiting the 8th magnitude G-type main sequence star HD 48265. It has a minimum mass of 1.47 times that of Jupiter. Because its inclination is not known, its true mass is not known. It orbits at a distance of 1.81 AU with an orbital eccentricity of 0.08.
Excerpted from Wikipedia · full article
1 sibling around HD 48265
HD 48265 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 |
|---|---|---|---|---|---|---|
| HD 48265 b this | Gas Giant | 12.60 | 2,351.93 | 778.510 | — | 2008 |
| HD 48265 c | Gas Giant | 12.90 | 1,414.34 | 10,418.000 | — | 2026 |
HD 48265 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1179of 1771
top 66.5%
This planet
12.60R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 48265 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.60 | 11.21 |
| Mass (M⊕) | 1.00 | 2,351.93 | 317.83 |
| Density (g/cm³) | 5.51 | 6.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 14.81 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,351.930 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 484.691 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 48265
HIP
HIP 31895
TIC
TIC 255781806
Gaia DR2
Gaia DR2 5551551998119947648
Gaia DR3
Gaia DR3 5551551998119947648
System
HD 48265
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 2.13 Earth years on a mildly elliptical path at a mean orbital distance of 1.8140 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.424
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Minniti et al. 2009Instrument
MIKE Spectrograph
Publication
2009-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2008 at Las Campanas Observatory (3 shown).
Host System: HD 48265
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,733 K — cooler than the Sun (5,778 K)
Estimated Age
4.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.901 R☉
Stellar Mass
1.312 M☉
Metallicity [Fe/H]
0.30
Extended Stellar Properties
Surface gravity (log g)
3.970 dex
Stellar density
0.167 g/cm³
Systemic radial velocity
23.52 km/s
Rotational v·sin i
3.10 km/s
Rotation period
45.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
11.016 mas
Total Proper Motion
39.781 mas/yr
PM Right Ascension
26.43 mas/yr
PM Declination
29.74 mas/yr
Galactic Cartesian (pc)
x = -0.115 · y = 0.652 · z = -0.749
Equatorial (J2000)
RA 100.00737° · Dec -48.54183°
Galactic ℓ, b
257.527° · -21.780°
Ecliptic λ, β
110.973° · -71.253°
HTM-20 index
-2120597265
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