GJ 3323
Star
GJ 3323 - a small red dwarf 17.5 light-years away in Eridanus, host to two super-Earths found from the star's radial-velocity wobble. One orbits near the inner edge of the temperate zone.
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Key facts
Mass
3.26 × 10²⁹ kg
0.164 M☉
Radius
82,788 km
12% of the Sun's radius
Surface temperature
3,159 K (2,886 °C)
Luminosity
1.03 × 10²⁴ W
Spectral type
M4V (red dwarf)
Science
Physical
- Mass
- 3.26 × 10²⁹ kg · 0.164 M☉
- Radius
- 82,788 km · 12% of the Sun's radius
- Density
- 137,235 kg/m³ · 1.4e+02× water
- Computed from mass and radius
- Spectral type
- M4V (red dwarf)
Motion through space
- Proper motion
- 0.768 arcseconds per year · its drift across our sky
- SIMBAD — 2020yCat.1350....0G, 2018MNRAS.475.1960F
- Radial velocity
- +42.5 km/s · moving away from the Sun
- SIMBAD — 2020yCat.1350....0G, 2018MNRAS.475.1960F
- Speed across our line of sight
- 19.6 km/s
- Computed from proper motion and parallax
- Speed through space, relative to the Sun
- 46.8 km/s
- Computed from proper motion, parallax and radial velocity
Rotation
- Note
- A low-mass red dwarf; its two planets were teased out with ESO's HARPS.
Composition
- By mass
- A small hydrogen/helium red dwarf about 0.16 solar mass and ~0.3% of the Sun's light, 17.5 light-years away in Eridanus, host to two super-Earths found by radial velocity.
Temperature
- Surface
- 3,159 K (2,886 °C)
Radiation & temperature
- Luminosity
- 1.03 × 10²⁴ W · 0.0027 L☉
- Surface temperature
- 3,159 K (2,886 °C)
- Peak wavelength
- 917 nm · near-infrared (mostly invisible to the eye)
- Computed (Wien's law) from the surface temperature
Discovery & history
- Method
- Telescope
- Name
- A catalogue designation (Gliese-Jahreiss 3323); also Luyten's LP 656-38.
A nearby low-mass red dwarf whose two planets were announced in 2017 by a team using ESO's HARPS spectrograph.
Images
Images from open archives · credit shown per image