Key parameters at a glance
- A radius of 1.31 Earth radii
- A mass of 4.04 Earth masses
- Surface gravity around 2.35 g
- An orbital period of 1.621 days
- Semi-major axis 0.0273 AU
- Equilibrium temperature 2,130 K (1857 °C)
- Distance from Earth 506.58 light-years
- Earth Similarity Index 0.113
- Travel time at Voyager 1 speed 8,933,462 years
1 sibling around HD 137496
HD 137496 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 137496 b this | Super-Earth | 1.31 | 4.04 | 1.621 | 2,130 | 2021 |
| HD 137496 c | Gas Giant | 12.60 | 2,434.57 | 479.900 | 370 | 2021 |
HD 137496 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1072of 1176
top 91.1%
This planet
1.31R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | HD 137496 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.31 | 11.21 |
| Mass (M⊕) | 1.00 | 4.04 | 317.83 |
| Density (g/cm³) | 5.51 | 10.49 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.35 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4.040 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 137496
TIC
TIC 346250894
Gaia DR2
Gaia DR2 6258810550587404672
Gaia DR3
Gaia DR3 6258810550587404672
System
HD 137496
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.62 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0273 AU.
Transit Fingerprint
Depth
0.006 %
Duration
3.280 h
Impact parameter b
0.270
Rp / R★
0.007600
Transit midpoint (BJD)
2,458,039.1317
Photometric dip
Transit produces a flux drop of 58 ppm lasting ≈ 3.28 h.
Extended Orbital Architecture
Planet / star radius ratio
0.007600
Semi-major axis / stellar radius
3.700
Impact parameter (b)
0.270
RV semi-amplitude (K)
2.140 m/s
Transit mid-time (BJD)
2,458,039.1317
Angular separation (arcsec)
0.17600
Eq. Temperature
2,130K
(1857 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.113
0 = alien, 1 = Earth-identical
Insufficient insolation data — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Azevedo Silva et al. 2022Instrument
Kepler CCD Array
Publication
2022-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at K2 (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
Similar Worlds
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Super-Earth · G-type yellow (Sun-like)
Radius 1.31 R⊕ · 4,066.9 ly
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EPIC 205950854 c
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Super-Earth · G-type yellow (Sun-like)
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