Key parameters at a glance
- A mass of 1,588.82 Earth masses
- An orbital period of 3.934 days
- Semi-major axis 0.0500 AU
- Distance from Earth 132.25 light-years
- Travel time at Voyager 1 speed 2,332,155 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around HD 215497
HD 215497 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 215497 b this | Unclassified | — | 1,588.82 | 3.934 | — | 2009 |
| HD 215497 c | Gas Giant | 13.00 | 111.24 | 566.000 | — | 2009 |
HD 215497 b Planet Profile
Physical Specs
Classification
Planet Type
Unclassified
Discovery
| Metric | Earth | HD 215497 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | — | 11.21 |
| Mass (M⊕) | 1.00 | 1,588.82 | 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 | 1,588.824 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 6.357 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 215497
HIP
HIP 112441
TIC
TIC 469943599
Gaia DR2
Gaia DR2 6504232472302122624
Gaia DR3
Gaia DR3 6504232472302122624
System
HD 215497
Percentile among Unclassified cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.93 Earth days (1.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0500 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
Lo Curto et al. 2010Instrument
HARPS Spectrograph
Publication
2010-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at La Silla Observatory (12 shown).
Host System: HD 215497
Spectral Class
K-type orange
Effective Temperature
5,110 K — cooler than the Sun (5,778 K)
Estimated Age
5.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.850 R☉
Stellar Mass
0.670 M☉
Metallicity [Fe/H]
0.20
Extended Stellar Properties
Surface gravity (log g)
4.400 dex
Stellar density
1.978 g/cm³
Systemic radial velocity
49.31 km/s
Rotational v·sin i
1.67 km/s
Activity index (log R'HK)
-5.070
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
24.634 mas
Total Proper Motion
81.928 mas/yr
PM Right Ascension
-54.66 mas/yr
PM Declination
-61.03 mas/yr
Galactic Cartesian (pc)
x = 0.523 · y = -0.173 · z = -0.835
Equatorial (J2000)
RA 341.65271° · Dec -56.59980°
Galactic ℓ, b
331.295° · -53.102°
Ecliptic λ, β
316.773° · -44.189°
HTM-20 index
1493825013
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HD 215152 c
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