Kappa Ursae Majoris
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Observation data Epoch J2000.0 |
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Constellation | Ursa Major |
Right ascension | 09h 03m 37.5s |
Declination | +47° 09' 24" |
Apparent magnitude (V) | +3.57 |
Distance | 423 ± 46 ly (130 ± 14 pc) |
Spectral type | A0IV-V + A0V |
Other designations | |
Kappa Ursae Majoris (κ UMa / κ Ursae Majoris) is a binary star in the constellation Ursa Major. It is approximately 423 light years from Earth and has the traditional names Talitha Australis, Al Kaprah, and Alphikra Australis.
Both components of the binary star are a white A-type main sequence dwarfs. They have apparent magnitudes of +4.2 and +4.4, which gives the system a combined apparent magnitude of +3.57. The orbital period of the binary is 36 or 74 years, and the two stars are separated by 0.13 arcseconds.