Key parameters at a glance
- A radius of 13.00 Earth radii
- A mass of 1,334.88 Earth masses
- Surface gravity around 7.90 g
- An orbital period of 1,359.000 days
- Semi-major axis 2.5700 AU
- Distance from Earth 87.05 light-years
- Earth Similarity Index 0.419
- Travel time at Voyager 1 speed 1,535,156 years
Context from the literature
Rho Indi b is an exoplanet that orbits around Rho Indi. Its semimajor axis is 2.54 AU placing just outside the star's habitable zone. The planet takes 3.7 years to orbit the star. It is over twice as massive as Jupiter. Since the inclination of the orbit to the line-of-sight was initially unknown, only a lower bound on the planet's mass could be determined. In 2023, the inclination and true mass of Rho Indi b were determined via astrometry.
Excerpted from Wikipedia · full article
HD 216437 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#960of 1771
top 54.2%
This planet
13.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 216437 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.00 | 11.21 |
| Mass (M⊕) | 1.00 | 1,334.88 | 317.83 |
| Density (g/cm³) | 5.51 | 3.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 7.90 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,334.879 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 706.536 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 216437
HIP
HIP 113137
TIC
TIC 277774779
Gaia DR2
Gaia DR2 6384510877400590336
Gaia DR3
Gaia DR3 6384510877400590336
System
HD 216437
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 3.72 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.5700 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.419
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
Jones et al. 2002Instrument
UCLES Spectrograph
Publication
2002-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2002 at Anglo-Australian Telescope (5 shown).
Host System: HD 216437
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,909 K — hotter than the Sun (5,778 K)
Estimated Age
4.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.394 R☉
Stellar Mass
1.220 M☉
Metallicity [Fe/H]
0.20
Extended Stellar Properties
Surface gravity (log g)
4.188 dex
Stellar density
0.459 g/cm³
Systemic radial velocity
-2.05 km/s
Rotational v·sin i
3.70 km/s
Rotation period
30.00 days
Activity index (log R'HK)
-5.040
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
37.438 mas
Total Proper Motion
84.991 mas/yr
PM Right Ascension
-43.48 mas/yr
PM Declination
73.03 mas/yr
Galactic Cartesian (pc)
x = 0.327 · y = -0.096 · z = -0.940
Equatorial (J2000)
RA 343.66396° · Dec -70.07340°
Galactic ℓ, b
316.273° · -43.906°
Ecliptic λ, β
305.296° · -55.530°
HTM-20 index
-1483038324
Observation Record
Photometric series
1
RV measurements
3
Stellar spectra
1
Archive notes
2
Similar Worlds
HD 195019 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 122.9 ly
MOA-2022-BLG-091L b
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 13,861.6 ly
HD 47186 c
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 122.2 ly
HD 92788 c
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 113.0 ly
HIP 14810 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 164.6 ly
HD 35759 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.00 R⊕ · 232.4 ly