Wie die Delta-Cepheiden lässt sich bei ihnen auch direkt von der Periodenlänge auf die Leuchtkraft und damit Entfernung schließen, allerdings nach einer anderen Formel.
Dies hat früher oft zu Fehlberechnungen auf Grund von Verwechslungen der beiden Typen geführt.
Sternbild:
www.jumk.deLike with the Delta-Cepheids from their period length can be reasoned well-defined to their luminosity and therefore to their distance, however with a different formula.
This in the past had sometimes led to miscalculations caused by mix-ups between the two types.
Constellation:
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