Key parameters at a glance
- A radius of 1.61 Earth radii
- A mass of 5.72 Earth masses
- Surface gravity around 2.20 g
- An orbital period of 0.720 days
- Semi-major axis 0.0166 AU
- Equilibrium temperature 2,463 K (2190 °C)
- Distance from Earth 358.31 light-years
- Earth Similarity Index 0.098
- Travel time at Voyager 1 speed 6,318,884 years
1 sibling around HD 80653
HD 80653 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 80653 b this | Super-Earth | 1.61 | 5.72 | 0.720 | 2,463 | 2020 |
| K2-312 c | Gas Giant | 12.80 | 1,719.45 | 921.200 | — | 2023 |
HD 80653 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#549of 1176
top 46.6%
This planet
1.61R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | HD 80653 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.61 | 11.21 |
| Mass (M⊕) | 1.00 | 5.72 | 317.83 |
| Density (g/cm³) | 5.51 | 7.47 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.20 | 2.53 |
| Insolation (S⊕) | 1.00 | 6,130.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 5.720 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 80653
TIC
TIC 55315929
Gaia DR2
Gaia DR2 606477252238780160
Gaia DR3
Gaia DR3 606477252238780160
System
HD 80653
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 17.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0166 AU.
Transit Fingerprint
Depth
0.016 %
Duration
1.798 h
Impact parameter b
0.400
Rp / R★
0.012100
Transit midpoint (BJD)
2,458,134.4244
Photometric dip
Transit produces a flux drop of 160 ppm lasting ≈ 1.80 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012100
Semi-major axis / stellar radius
2.920
Impact parameter (b)
0.400
RV semi-amplitude (K)
3.620 m/s
Transit mid-time (BJD)
2,458,134.4244
Angular separation (arcsec)
0.15100
Eq. Temperature
2,463K
(2190 °C)
Insolation (S⊕)
6,130.00
Earth = 1.00
Earth Similarity (ESI)
0.098
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — 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
Frustagli et al. 2020Instrument
Kepler CCD Array
Publication
2020-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at K2 (12 shown).
Host System: HD 80653
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,959 K — hotter than the Sun (5,778 K)
Estimated Age
2.67 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.220 R☉
Stellar Mass
1.180 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.340 dex
Stellar density
0.900 g/cm³
Systemic radial velocity
8.31 km/s
Rotation period
19.55 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
9.074 mas
Total Proper Motion
36.276 mas/yr
PM Right Ascension
-33.46 mas/yr
PM Declination
-14.01 mas/yr
Galactic Cartesian (pc)
x = -0.746 · y = 0.618 · z = 0.248
Equatorial (J2000)
RA 140.33908° · Dec 14.36787°
Galactic ℓ, b
216.500° · 39.624°
Ecliptic λ, β
138.231° · -1.047°
HTM-20 index
-347478176
Similar Worlds
HD 108236 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.62 R⊕ · 210.7 ly
Kepler-416 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.61 R⊕ · 2,253.1 ly
Kepler-100 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.61 R⊕ · 993.6 ly
Kepler-1448 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.61 R⊕ · 2,507.8 ly
Kepler-1322 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.61 R⊕ · 4,404.1 ly
Kepler-1610 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.61 R⊕ · 2,819.1 ly