Rigil Kentaurus
HIP 71681; Alpha2 Cen
Sep: 8.1", Companion: mag 1.3
Physikalische Eigenschaften
Position & Bezeichnungen
Sichtbarkeit
Standort in den Benutzereinstellungen festlegen um Sichtbarkeitsdaten zu sehen.
Mehrfachsternsystem
Okularansicht
Sep: 8.1″ · PA: 5° · N oben, O links
Aufgelöst · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Größenvergleich
Sternentwicklung
Spektralklassifikation
Hertzsprung-Russell-Diagramm
Schwarzkörperspektrum
Stellares Absorptionsspektrum
Simuliertes Absorptionsspektrum basierend auf dem Spektraltyp. Bewegen Sie die Maus über die Linien, um die Elemente zu identifizieren.
Sternanmerkungen
Durchmusterungsbild
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Über Rigil Kentaurus
Beschreibung
Alpha Centauri B (Rigil Kentaurus B) is the fainter component of the Alpha Centauri binary, an orange Hauptreihenstern of Spektraltyp K1V at magnitude 1.33. At 4.37 Lichtjahre, it is part of the nearest star system to Earth. It is slightly smaller, cooler, and less luminous than die Sonne, with about 50% of Sonnenleuchtkraft.
Beobachtungstipps
Alpha Centauri B is easily resolved from the brighter A component in a kleines Teleskop — the pair currently has a separation of several Bogensekunden. Look for the slightly orange companion next to the golden primary. The Umlaufzeit is about 80 years, and the separation varies between 2 and 22 Bogensekunden. Not visible north of about 29°N.
Geschichte
Alpha Centauri B has the same naming history as its primary. In 2012, a planet candidate (Alpha Centauri Bb) was announced orbiting this star, generating worldwide excitement as the nearest exoplanet, but subsequent analysis showed the detection was likely a statistical artifact. The search for planets in this system continues.
Wissenswertes
Alpha Centauri B experiences significantly different seasons and day lengths than Earth due to the gravitational influence of its binary companion. From a hypothetical planet orbiting B, Alpha Centauri A would appear as an extremely bright star (about magnitude -21), roughly 200 times brighter than our Vollmond.