„2006, confirmation was achieved“ aus Fred Schaaf: The Brightest Stars: Discovering the Universe through the Sky's Most Brilliant Stars. Hoboken (NJ, USA) 2008, S. 117; Orbit 0,5 bis 2 Mill. Jahre Govert Schilling: Atlas of Astronomical Discoveries. N.Y./Dordrecht/Heidelberg/London 2011 (2008), S. 107