Key parameters at a glance
- A radius of 14.30 Earth radii
- A mass of 146.52 Earth masses
- Surface gravity around 0.72 g
- An orbital period of 203.109 days
- Semi-major axis 0.3376 AU
- Distance from Earth 30.94 light-years
- Earth Similarity Index 0.247
- Travel time at Voyager 1 speed 545,633 years
1 sibling around GJ 3512
GJ 3512 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 |
|---|---|---|---|---|---|---|
| GJ 3512 b this | Gas Giant | 14.30 | 146.52 | 203.109 | — | 2019 |
| GJ 3512 c | Gas Giant | 14.30 | 143.98 | 2,354.000 | — | 2020 |
GJ 3512 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#301of 1771
top 16.9%
This planet
14.30R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | GJ 3512 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.30 | 11.21 |
| Mass (M⊕) | 1.00 | 146.52 | 317.83 |
| Density (g/cm³) | 5.51 | 0.28 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.72 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 146.519 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 445064836
Gaia DR2
Gaia DR2 1040827088726734976
Gaia DR3
Gaia DR3 1040827088726734976
System
GJ 3512
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 203.11 Earth days (55.6% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.3376 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
71.280 m/s
Transit mid-time (BJD)
2,457,739.5100
Long. of periastron (ω)
126.80°
Angular separation (arcsec)
35.60000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.247
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Morales et al. 2019Instrument
CARMENES
Publication
2019-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2019 at Calar Alto Observatory (4 shown).
Host System: GJ 3512
Spectral Class
M-type red dwarf
Effective Temperature
3,141 K — cooler than the Sun (5,778 K)
Estimated Age
5.50 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.139 R☉
Stellar Mass
0.123 M☉
Metallicity [Fe/H]
-0.07
Extended Stellar Properties
Surface gravity (log g)
5.158 dex
Stellar density
47.478 g/cm³
Rotational v·sin i
2.00 km/s
Rotation period
83.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 7 bands
Astrometric Data
Parallax
105.386 mas
Total Proper Motion
1,305.841 mas/yr
PM Right Ascension
-260.42 mas/yr
PM Declination
-1,279.61 mas/yr
Galactic Cartesian (pc)
x = -0.329 · y = 0.387 · z = 0.862
Equatorial (J2000)
RA 130.33166° · Dec 59.49184°
Galactic ℓ, b
157.244° · 36.962°
Ecliptic λ, β
115.211° · 39.533°
HTM-20 index
1201996123
Similar Worlds
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Gas Giant · M-type red dwarf
Radius 14.30 R⊕ · 30.9 ly
OGLE-2012-BLG-0724L b
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GJ 9773 b
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GU Psc b
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Gas Giant · M-type red dwarf
Radius 14.10 R⊕ · 25,211.9 ly