Struve 2398
system
Struve 2398 is a pair of red dwarfs 11.5 light-years away in Draco, catalogued as a double star by F. G. W. von Struve around 1822. The two stars, each a fraction of the Sun's mass, circle each other over many centuries. Both flare gently. No planets are confirmed.
Open in 3D viewSee Struve 2398 in the live, interactive 3D map
Key facts
Type
Binary red dwarfs
Distance
11.49 light-years
Confirmed planets
0
Science
Classification
- Type
- Binary red-dwarf system
- Stars
- Struve 2398 A (M3V, ~0.33 M☉) + B (M3.5V, ~0.25 M☉)
Orbit
- Mutual orbit
- ≈1,170 years; ~63 AU semi-major axis (e ≈ 0.44)
Planets
- Confirmed planets
- None
How we know
- Note
- No planets are confirmed around either star. The pair's long orbit is only approximately known — 2025 determinations give periods of roughly 870 to 1,170 years (older visual orbits gave ~410 years); the map position is symbolic, and the real distance is 11.49 light-years.
Discovery & history
- Name
- Named for the astronomer F. G. W. von Struve and its double-star catalogue number (Σ 2398); also GJ 725.
Recorded as a double star by F. G. W. von Struve at Dorpat around 1822 — the 2398th entry in his catalogue of visual binaries.
Images
Images from open archives · credit shown per image