Key parameters at a glance
- A radius of 12.50 Earth radii
- A mass of 2,831.85 Earth masses
- Surface gravity around 18.12 g
- An orbital period of 2,492.190 days
- Semi-major axis 4.3300 AU
- Distance from Earth 201.24 light-years
- Earth Similarity Index 0.398
- Travel time at Voyager 1 speed 3,548,905 years
1 sibling around HD 94890
HD 94890 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 94890 b | Gas Giant | 13.30 | 676.97 | 824.610 | — | 2025 |
| HD 94890 c this | Gas Giant | 12.50 | 2,831.85 | 2,492.190 | — | 2025 |
HD 94890 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1235of 1771
top 69.7%
This planet
12.50R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 94890 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.50 | 11.21 |
| Mass (M⊕) | 1.00 | 2,831.85 | 317.83 |
| Density (g/cm³) | 5.51 | 7.97 | 1.33 |
| Surface Gravity (g) | 1.00 | 18.12 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 2,831.851 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 94890
HIP
HIP 53502
TIC
TIC 158543228
Gaia DR2
Gaia DR2 5394951821153092864
Gaia DR3
Gaia DR3 5394951821153092864
System
HD 94890
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 6.82 Earth years on a nearly circular orbit at a mean orbital distance of 4.3300 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.398
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Fontanet et al. 2025Instrument
CORALIE Spectrograph
Publication
2025-05
Observation locale
Ground
Discovery cohort
Planets confirmed in 2025 at La Silla Observatory (12 shown).
Host System: HD 94890
Spectral Class
K-type orange
Effective Temperature
4,867 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
10.710 R☉
Stellar Mass
1.740 M☉
Metallicity [Fe/H]
-0.02
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
16.182 mas
Total Proper Motion
145.576 mas/yr
PM Right Ascension
74.30 mas/yr
PM Declination
-125.19 mas/yr
Galactic Cartesian (pc)
x = -0.767 · y = 0.217 · z = -0.604
Equatorial (J2000)
RA 164.17978° · Dec -37.13830°
Galactic ℓ, b
278.856° · 20.313°
Ecliptic λ, β
183.038° · -39.819°
HTM-20 index
879020991
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