HD 85945 (HR 3922) is a star in the constellationUrsa Major. It is ayellow giant star with aspectral type of G6III:Fe-0.5. Based on information from Gaia DR3, it is located 132.54parsecs (432.3 ly) from Earth and is moving towards Earth at a velocity of 47 km/s. It has anapparent magnitude of 5.96, which makes it faintly visible to thenaked eye.
It is an evolvedG-type giant star, based on itsspectral type of G6III:Fe-0.5, which also indicates that it has a [Fe/H] metallicity of -0.5.[2] HD 85945 is 2.5 times more massive than the Sun and has expanded to 10.28 times the Sun's size.[3][6] It is emitting 78 times thesolar luminosity from its photosphere at aneffective temperature of 5,281 K.[7][6] Currently, the star is located in thehorizontal branch stage ofevolution.[3] The age of HD 85945 is estimated at 660 million years,[3] and it rotates under its axis at a speed of 7.53 km/s.[4] It is slightlymetal-poor compared to the Sun, with an abundance of iron equivalent to 40% of the solar abundance.[7][c]
HD 85945 is located within theUrsa Major constellation. The distance to HD 85945 is of 132.54parsecs (432.3 ly), based on spectra from Gaia DR3.[5] Theapparent magnitude of the star is of 5.96,[2] which is brighter than thelimiting magnitude for naked-eye vision (6.5m), making it faintly visible to thenaked eye.[8] The absolute magnitude, i.e. the brightness of the star if it was seen at a distance of 10 parsecs (32.6 ly), is 0.32.[9] At the current distance, its brightness is diminished by 0.03 magnitudes due tointerstellar extinction between Earth and the star.[6] HD 85945 is moving away from Earth at a velocity of 46.55 km/s.[5] It has a highproper motion in the sky.[6][2]
