Key parameters at a glance
- A radius of 12.90 Earth radii
- A mass of 1,525.58 Earth masses
- Surface gravity around 9.17 g
- An orbital period of 6,240.000 days
- Semi-major axis 5.9000 AU
- Distance from Earth 77.40 light-years
- Earth Similarity Index 0.427
- Travel time at Voyager 1 speed 1,365,031 years
1 sibling around BD-210397
BD-210397 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 |
|---|---|---|---|---|---|---|
| BD-210397 b | Gas Giant | 14.00 | 214.00 | 1,891.000 | — | 2023 |
| BD-210397 c this | Gas Giant | 12.90 | 1,525.58 | 6,240.000 | — | 2023 |
BD-210397 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1011of 1771
top 57.0%
This planet
12.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | BD-210397 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.90 | 11.21 |
| Mass (M⊕) | 1.00 | 1,525.58 | 317.83 |
| Density (g/cm³) | 5.51 | 3.91 | 1.33 |
| Surface Gravity (g) | 1.00 | 9.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,525.576 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 759.000 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HIP
HIP 10337
TIC
TIC 268804174
Gaia DR2
Gaia DR2 5124636303346779008
Gaia DR3
Gaia DR3 5124636303346779008
System
BD-210397
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 17.08 Earth years on a highly eccentric trajectory at a mean orbital distance of 5.9000 AU.
Eq. Temperature
—
Insolation (S⊕)
0.00
Earth = 1.00
Earth Similarity (ESI)
0.427
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Frensch et al. 2023Instrument
HARPS Spectrograph
Publication
2023-06
Observation locale
Ground
Discovery cohort
Planets confirmed in 2023 at La Silla Observatory (12 shown).
Host System: BD-210397
Spectral Class
K-type orange
Effective Temperature
4,051 K — cooler than the Sun (5,778 K)
Estimated Age
4.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.747 R☉
Stellar Mass
0.690 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.670 dex
Stellar density
2.239 g/cm³
Rotational v·sin i
3.20 km/s
Activity index (log R'HK)
-4.430
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
42.108 mas
Total Proper Motion
379.601 mas/yr
PM Right Ascension
375.48 mas/yr
PM Declination
55.81 mas/yr
Galactic Cartesian (pc)
x = 0.779 · y = 0.512 · z = -0.362
Equatorial (J2000)
RA 33.30242° · Dec -21.19621°
Galactic ℓ, b
199.699° · -70.456°
Ecliptic λ, β
22.689° · -32.368°
HTM-20 index
-1551739179
Observation Record
Photometric series
1
Stellar spectra
1
Archive notes
2
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