Key parameters at a glance
- A mass of 770.42 Earth masses
- An orbital period of 10.865 days
- Semi-major axis 0.0880 AU
- Distance from Earth 70.44 light-years
- Travel time at Voyager 1 speed 1,242,231 years
- Almost certainly tidally locked to its host star given the close orbit
3 siblings around HD 215152
HD 215152 d shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 215152 b | Unclassified | — | 565.42 | 5.760 | — | 2018 |
| HD 215152 c | Unclassified | — | 468.80 | 7.282 | — | 2018 |
| HD 215152 d this | Unclassified | — | 770.42 | 10.865 | — | 2018 |
| HD 215152 e | Unclassified | — | 975.42 | 25.197 | — | 2018 |
HD 215152 d Planet Profile
Physical Specs
Classification
Planet Type
Unclassified
Discovery
| Metric | Earth | HD 215152 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | — | 11.21 |
| Mass (M⊕) | 1.00 | 770.42 | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | — | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 770.416 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 2.801 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 215152
HIP
HIP 112190
TIC
TIC 251042502
Gaia DR2
Gaia DR2 2623505219992303104
Gaia DR3
Gaia DR3 2623505219992303104
System
HD 215152
Percentile among Unclassified cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.86 Earth days (3.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0880 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
—
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Delisle et al. 2018Instrument
HARPS Spectrograph
Publication
2018-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2018 at La Silla Observatory (5 shown).
Host System: HD 215152
Spectral Class
K-type orange
Effective Temperature
4,935 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.730 R☉
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.400 dex
Stellar density
2.399 g/cm³
Systemic radial velocity
-13.87 km/s
Rotational v·sin i
3.35 km/s
Rotation period
42.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
46.273 mas
Total Proper Motion
328.189 mas/yr
PM Right Ascension
-154.15 mas/yr
PM Declination
-289.74 mas/yr
Galactic Cartesian (pc)
x = 0.939 · y = -0.326 · z = -0.112
Equatorial (J2000)
RA 340.83809° · Dec -6.40207°
Galactic ℓ, b
61.336° · -53.198°
Ecliptic λ, β
339.890° · 1.573°
HTM-20 index
1549692185
Similar Worlds
BD-08 2823 b
Unclassified · K-type orange
Radius — R⊕ · 134.8 ly
HD 181433 b
Unclassified · K-type orange
Radius — R⊕ · 87.7 ly
HD 215152 c
Unclassified · K-type orange
Radius — R⊕ · 70.4 ly
BD+05 4868 A b
Unclassified · K-type orange
Radius — R⊕ · 142.1 ly
WASP-53 c
Unclassified · K-type orange
Radius — R⊕ · 656.7 ly
HD 40307 c
Unclassified · K-type orange
Radius — R⊕ · 42.2 ly