HD 80606
Star
HD 80606 — a Sun-like G-type star ~217 light-years away in Ursa Major, the planet-hosting member of a wide binary. It is unremarkable but for the planet on its extraordinarily elongated orbit.
Open in 3D viewSee HD 80606 in the live, interactive 3D map
Key facts
Mass
2.09 × 10³⁰ kg
1.05 M☉
Radius
730,485 km
1.05× wider than the Sun
Surface temperature
5,565 K (5,292 °C)
Spectral type
G5 (a Sun-like yellow dwarf)
Science
Physical
- Mass
- 2.09 × 10³⁰ kg · 1.05 M☉
- Radius
- 730,485 km · 1.05× wider than the Sun
- Density
- 1,279 kg/m³ · 1.3× water
- Computed from mass and radius
- Spectral type
- G5 (a Sun-like yellow dwarf)
Motion through space
- Proper motion
- 0.057 arcseconds per year · its drift across our sky
- SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
- Radial velocity
- +4.0 km/s · moving away from the Sun
- SIMBAD — 2020yCat.1350....0G, 2018A&A...616A...7S
- Speed across our line of sight
- 17.8 km/s
- Computed from proper motion and parallax
- Speed through space, relative to the Sun
- 18.3 km/s
- Computed from proper motion, parallax and radial velocity
Composition
- By mass
- A near solar-twin (~1.05 solar masses) and the marginally brighter member of a near-identical wide binary with HD 80607 (V 9.06 vs 9.17) — the two are so alike they are often called twins.
Temperature
- Surface
- 5,565 K (5,292 °C)
Radiation & temperature
- Luminosity
- 3.65 × 10²⁶ W · 0.953 L☉
- Surface temperature
- 5,565 K (5,292 °C)
- Peak wavelength
- 521 nm · green-yellow visible light
- Computed (Wien's law) from the surface temperature
Discovery & history
- Method
- Telescope
- Name
- A Henry Draper Catalogue designation.
Catalogued long ago; in 2001 radial-velocity measurements revealed its planet's extreme orbit.
Images
Images from open archives · credit shown per image