Key parameters at a glance
- A radius of 11.90 Earth radii
- A mass of 8,725.66 Earth masses
- Surface gravity around 61.62 g
- An orbital period of 40,654.648 days
- Semi-major axis 21.4490 AU
- Distance from Earth 58.52 light-years
- Earth Similarity Index 0.253
- Travel time at Voyager 1 speed 1,031,935 years
2 siblings around HD 153557
HD 153557 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 153557 b | Neptune-like | 4.77 | 20.34 | 7.299 | — | 2022 |
| HD 153557 c | Neptune-like | 4.36 | 17.48 | 15.270 | — | 2022 |
| HD 153557 d this | Gas Giant | 11.90 | 8,725.66 | 40,654.648 | — | 2022 |
HD 153557 d Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1526of 1771
top 86.1%
This planet
11.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 153557 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.90 | 11.21 |
| Mass (M⊕) | 1.00 | 8,725.66 | 317.83 |
| Density (g/cm³) | 5.51 | 28.50 | 1.33 |
| Surface Gravity (g) | 1.00 | 61.62 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 8,725.661 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 153557
HIP
HIP 83020 A
TIC
TIC 115582979
Gaia DR2
Gaia DR2 1408029509584967168
Gaia DR3
Gaia DR3 1408029509584967168
System
HIP 83020 A
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 111.31 Earth years on a mildly elliptical path at a mean orbital distance of 21.4490 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.253
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Feng et al. 2022Instrument
Multiple Instruments
Publication
2022-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2022 at Multiple Observatories (12 shown).
Host System: HD 153557
Spectral Class
K-type orange
Effective Temperature
4,837 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.745 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
4.591 dex
Stellar density
2.692 g/cm³
Systemic radial velocity
-7.20 km/s
Rotational v·sin i
2.00 km/s
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
55.709 mas
Total Proper Motion
308.766 mas/yr
PM Right Ascension
-145.79 mas/yr
PM Declination
272.18 mas/yr
Galactic Cartesian (pc)
x = -0.181 · y = -0.653 · z = 0.736
Equatorial (J2000)
RA 254.47065° · Dec 47.36786°
Galactic ℓ, b
73.379° · 38.467°
Ecliptic λ, β
239.351° · 69.161°
HTM-20 index
-926956240
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