Key parameters at a glance
- A radius of 12.60 Earth radii
- A mass of 2,451.73 Earth masses
- Surface gravity around 15.44 g
- An orbital period of 1,852.144 days
- Semi-major axis 3.7290 AU
- Distance from Earth 505.94 light-years
- Earth Similarity Index 0.419
- Travel time at Voyager 1 speed 8,922,189 years
1 sibling around HIP 8541
HIP 8541 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 11343 c | Gas Giant | 13.90 | 255.53 | 228.537 | — | 2022 |
| HIP 8541 b this | Gas Giant | 12.60 | 2,451.73 | 1,852.144 | — | 2016 |
HIP 8541 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 | HIP 8541 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.60 | 11.21 |
| Mass (M⊕) | 1.00 | 2,451.73 | 317.83 |
| Density (g/cm³) | 5.51 | 6.73 | 1.33 |
| Surface Gravity (g) | 1.00 | 15.44 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,451.728 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,496.972 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 11343
HIP
HIP 8541
TIC
TIC 231019255
Gaia DR2
Gaia DR2 4912062772547406976
Gaia DR3
Gaia DR3 4912062772547406976
System
HIP 8541
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 5.07 Earth years on a highly eccentric trajectory at a mean orbital distance of 3.7290 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.419
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
Jones et al. 2016Instrument
Multiple Instruments
Publication
2016-05
Observation locale
Ground
Discovery cohort
Planets confirmed in 2016 at Multiple Observatories (12 shown).
Host System: HIP 8541
Spectral Class
K-type orange
Effective Temperature
4,672 K — cooler than the Sun (5,778 K)
Estimated Age
10.97 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
6.840 R☉
Stellar Mass
2.009 M☉
Metallicity [Fe/H]
-0.19
Extended Stellar Properties
Surface gravity (log g)
2.950 dex
Systemic radial velocity
6.61 km/s
Rotational v·sin i
1.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.418 mas
Total Proper Motion
119.928 mas/yr
PM Right Ascension
110.48 mas/yr
PM Declination
-46.67 mas/yr
Galactic Cartesian (pc)
x = 0.515 · y = 0.269 · z = -0.814
Equatorial (J2000)
RA 27.52720° · Dec -54.46516°
Galactic ℓ, b
285.471° · -60.629°
Ecliptic λ, β
351.472° · -58.590°
HTM-20 index
-1331570115
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