Key parameters at a glance
- A radius of 6.48 Earth radii
- A mass of 34.30 Earth masses
- Surface gravity around 0.82 g
- An orbital period of 35.806 days
- Semi-major axis 0.2263 AU
- Equilibrium temperature 719 K (446 °C)
- Distance from Earth 423.36 light-years
- Earth Similarity Index 0.233
- Travel time at Voyager 1 speed 7,466,016 years
1 sibling around TOI-1052
TOI-1052 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 |
|---|---|---|---|---|---|---|
| TOI-1052 b | Sub-Neptune | 2.87 | 16.90 | 9.140 | 1,135 | 2023 |
| TOI-1052 c this | Neptune-like | 6.48 | 34.30 | 35.806 | 719 | 2023 |
TOI-1052 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#241of 574
top 41.8%
This planet
6.48R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-1052 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.48 | 11.21 |
| Mass (M⊕) | 1.00 | 34.30 | 317.83 |
| Density (g/cm³) | 5.51 | 0.69 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.82 | 2.53 |
| Insolation (S⊕) | 1.00 | 39.70 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 34.300 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 212729
TIC
TIC 317060587
Gaia DR2
Gaia DR2 6357524189130820992
Gaia DR3
Gaia DR3 6357524189130820992
System
TOI-1052
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 35.81 Earth days (9.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.2263 AU.
Extended Orbital Architecture
Semi-major axis / stellar radius
38.600
RV semi-amplitude (K)
6.110 m/s
Transit mid-time (BJD)
2,459,425.1300
Long. of periastron (ω)
-45.00°
Angular separation (arcsec)
1.74000
Eq. Temperature
719K
(446 °C)
Insolation (S⊕)
39.70
Earth = 1.00
Earth Similarity (ESI)
0.233
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Armstrong et al. 2023Instrument
Multiple Instruments
Publication
2023-07
Observation locale
Multiple Locales
Discovery cohort
Planets confirmed in 2023 at Multiple Observatories (12 shown).
Host System: TOI-1052
Spectral Class
F-type yellow-white
Effective Temperature
6,146 K — hotter than the Sun (5,778 K)
Estimated Age
2.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.264 R☉
Stellar Mass
1.204 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.300 dex
Stellar density
0.494 g/cm³
Systemic radial velocity
54.95 km/s
Rotational v·sin i
5.00 km/s
Rotation period
12.80 days
Activity index (log R'HK)
-5.320
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.675 mas
Total Proper Motion
63.357 mas/yr
PM Right Ascension
-63.33 mas/yr
PM Declination
-1.94 mas/yr
Galactic Cartesian (pc)
x = 0.229 · y = -0.095 · z = -0.969
Equatorial (J2000)
RA 337.51027° · Dec -75.64656°
Galactic ℓ, b
313.483° · -38.441°
Ecliptic λ, β
295.865° · -58.334°
HTM-20 index
666738892
Similar Worlds
TOI-6038 A b
Neptune-like · F-type yellow-white
Radius 6.41 R⊕ · 584.3 ly
KIC 5437945 b
Neptune-like · F-type yellow-white
Radius 6.40 R⊕ · 4,155.3 ly
KOI-94 e
Neptune-like · F-type yellow-white
Radius 6.56 R⊕ · 1,555.9 ly
PH1 b
Neptune-like · F-type yellow-white
Radius 6.18 R⊕ · 3,369.7 ly
Kepler-450 b
Neptune-like · F-type yellow-white
Radius 6.14 R⊕ · 1,487.2 ly
Kepler-820 b
Neptune-like · F-type yellow-white
Radius 6.09 R⊕ · 4,524.4 ly