Key parameters at a glance
- A radius of 12.60 Earth radii
- A mass of 2,434.57 Earth masses
- Surface gravity around 15.33 g
- An orbital period of 479.900 days
- Semi-major axis 1.2163 AU
- Equilibrium temperature 370 K (97 °C)
- Distance from Earth 506.58 light-years
- Earth Similarity Index 0.433
- Travel time at Voyager 1 speed 8,933,462 years
1 sibling around HD 137496
HD 137496 c 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 137496 b | Super-Earth | 1.31 | 4.04 | 1.621 | 2,130 | 2021 |
| HD 137496 c this | Gas Giant | 12.60 | 2,434.57 | 479.900 | 370 | 2021 |
HD 137496 c 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 137496 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.60 | 11.21 |
| Mass (M⊕) | 1.00 | 2,434.57 | 317.83 |
| Density (g/cm³) | 5.51 | 6.69 | 1.33 |
| Surface Gravity (g) | 1.00 | 15.33 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 2,434.566 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 137496
TIC
TIC 346250894
Gaia DR2
Gaia DR2 6258810550587404672
Gaia DR3
Gaia DR3 6258810550587404672
System
HD 137496
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 1.31 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.2163 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
221.250 m/s
Transit mid-time (BJD)
2,458,629.2100
Long. of periastron (ω)
-39.01°
Angular separation (arcsec)
7.83000
Eq. Temperature
370K
(97 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.433
0 = alien, 1 = Earth-identical
Insufficient insolation data — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Azevedo Silva et al. 2022Instrument
Multiple Instruments
Publication
2022-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2021 at Multiple Observatories (12 shown).
Host System: HD 137496
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,799 K — hotter than the Sun (5,778 K)
Estimated Age
8.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.590 R☉
Stellar Mass
1.040 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.050 dex
Stellar density
0.259 g/cm³
Systemic radial velocity
-2.99 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
6.411 mas
Total Proper Motion
51.167 mas/yr
PM Right Ascension
20.54 mas/yr
PM Declination
-46.86 mas/yr
Galactic Cartesian (pc)
x = -0.594 · y = -0.753 · z = -0.284
Equatorial (J2000)
RA 231.74205° · Dec -16.50900°
Galactic ℓ, b
348.345° · 32.321°
Ecliptic λ, β
233.546° · 2.221°
HTM-20 index
1878043934
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