Polarstern

1Alp UMi

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Polaris holds the Alpha designation in Ursa Minor, the Little Bear, and is additionally listed as 1 Ursae Minoris in the Flamsteed system. It is a yellow-white F-type star, an intermediate spectral class whose colour index of 0.636 reflects a surface cooler than white A stars but warmer than the orange K types. Though it appears at a moderate apparent magnitude of 1.97, its absolute magnitude of −3.64 reveals substantial intrinsic luminosity, a brightness muted by its distance of some 433 light-years. That gap between apparent and true brightness is typical of luminous stars observed across several hundred light-years of space.

Physikalische Eigenschaften

Spektralklasse F Class F — F-type (Yellow-White)
Farbindex (B−V) 0,636

Beobachtung

Scheinbare Helligkeit +1.97
Absolute Helligkeit -3,64
Entfernung 433 ly

Position

Rektaszension 2h 31,79m
Deklination 89° 15,85′

Related Chemistry

Explore the chemical elements connected to Polarstern on our sister site ChemFYI.

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Frequently Asked Questions

What type of star is Polarstern?
Polarstern is a Class F — F-type (Yellow-White) star.
How far is Polarstern from Earth?
Polarstern is approximately 432.6 light-years from Earth.
Can you see Polarstern with the naked eye?
With an apparent magnitude of 1.97, Polarstern is visible to the naked eye.