1999/05/01 by N. H. Turner, Theo A. ten Brummelaar, Brian D. Mason · 4 citations
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies
paper · pdf · doi:10.1086/316353
openalex publication_date 1999/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Upon inspection of the multiple‐star results in the Hipparcos catalog, the flag for entry number 69673 particularly stands out; it is Arcturus, for which no companion has been reported previously. The Hipparcos companion is reported to be at a separation of 0 255 ± 0 039 with a magnitude difference in a broadband filter (peaked near 460 nm) of 3.33 ± 0.31. We present recent results using the natural guide star adaptive optics system on the Mount Wilson 100 inch telescope showing Arcturus to be a single star.