Key parameters at a glance
- A radius of 3.05 Earth radii
- A mass of 9.82 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 11.621 days
- Semi-major axis 0.1049 AU
- Equilibrium temperature 1,003 K (730 °C)
- Distance from Earth 351.92 light-years
- Earth Similarity Index 0.231
- Travel time at Voyager 1 speed 6,206,035 years
1 sibling around HD 152843
HD 152843 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 152843 b this | Sub-Neptune | 3.05 | 9.82 | 11.621 | 1,003 | 2021 |
| HD 152843 c | Neptune-like | 5.94 | 9.67 | 19.502 | 253 | 2021 |
HD 152843 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#472of 1978
top 23.8%
This planet
3.05R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | HD 152843 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.05 | 11.21 |
| Mass (M⊕) | 1.00 | 9.82 | 317.83 |
| Density (g/cm³) | 5.51 | 1.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 265.40 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 9.820 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 152843
TIC
TIC 349488688
Gaia DR2
Gaia DR2 4564566554995619072
Gaia DR3
Gaia DR3 4564566554995619072
System
HD 152843
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.62 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1049 AU.
Transit Fingerprint
Depth
0.049 %
Duration
5.590 h
Impact parameter b
0.200
Rp / R★
0.019570
Transit midpoint (BJD)
2,458,994.2853
Photometric dip
Transit produces a flux drop of 486 ppm lasting ≈ 5.59 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019570
Impact parameter (b)
0.200
RV semi-amplitude (K)
2.530 m/s
Transit mid-time (BJD)
2,458,994.2853
Angular separation (arcsec)
0.97200
Eq. Temperature
1,003K
(730 °C)
Insolation (S⊕)
265.40
Earth = 1.00
Earth Similarity (ESI)
0.231
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
Eisner et al. 2021Instrument
TESS CCD Array
Publication
2021-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: HD 152843
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
6,310 K — hotter than the Sun (5,778 K)
Estimated Age
3.97 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.430 R☉
Stellar Mass
1.150 M☉
Metallicity [Fe/H]
-0.16
Extended Stellar Properties
Surface gravity (log g)
4.190 dex
Stellar density
0.551 g/cm³
Rotational v·sin i
8.38 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
9.239 mas
Total Proper Motion
47.062 mas/yr
PM Right Ascension
14.76 mas/yr
PM Declination
44.69 mas/yr
Galactic Cartesian (pc)
x = -0.262 · y = -0.899 · z = 0.350
Equatorial (J2000)
RA 253.78489° · Dec 20.49152°
Galactic ℓ, b
40.171° · 34.385°
Ecliptic λ, β
249.124° · 42.763°
HTM-20 index
1667548494
Similar Worlds
Kepler-1204 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.05 R⊕ · 3,833.1 ly
Kepler-463 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.05 R⊕ · 1,287.7 ly
Kepler-47 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.05 R⊕ · 3,343.2 ly
HD 168009 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.05 R⊕ · 76.0 ly
TOI-261.01
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 373.4 ly
Kepler-1490 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 2,814.5 ly