1908.31   0.26    2.9 Aitken (1908LicOB...5...28A)
1919.63   0.32   11.2 Aitken & Doolittle (1932QB821.A43......), New general catalogue of double stars within 120 of the North pole        
1934.25   0.30   23.4 Kuiper (1961ApJS....6....1K)        
1934.43   0.32   22.0 Aitken & Moore (1937LicOB..18...53A)        
1945.36   0.24   34.7 van Biesbroeck (1954, PYerO, 8, 6)             
1958.09   0.22   54.6 van den Bos (1960, PYerO, 9, 1)              
1958.38   0.21   57.0 van den Bos (1960, PYerO, 9, 1)              
1958.42   0.24   57.6 van den Bos (1960, PYerO, 9, 1)              
1962.14   0.18   65.2 van den Bos (1962AJ.....67..555V)      
1963.546  0.19   70.3 Worley (1971PUSNO..22....1W)        
1964.150  0.21   69.0 Worley (1971PUSNO..22....1W)        
1981.4619 0.121 142.0 McAlister et al. (1984ApJS...54..251M)        
1983.4141 0.111 157.8 McAlister et al. (1987AJ.....93..688M)        
1984.0530 0.110 162.7 McAlister et al. (1987AJ.....93..688M)        
1984.3751 0.112 164.6 McAlister et al. (1987AJ.....93..688M)        
1984.3834 0.108 164.4 McAlister et al. (1987AJ.....93..688M)        
1985.4894 0.112 168.3 McAlister et al. (1987AJ.....93..688M)        
1986.4066 0.103 179.6 McAlister et al. (1989AJ.....97..510M)        
1987.2695 0.102 186.3 McAlister et al. (1989AJ.....97..510M)        
1988.1653 0.097 193.4 McAlister et al. (1993AJ....106.1639M)        
1988.2523 0.095 196.1 McAlister et al. (1989AJ.....97..510M)        
1989.1561 0.105 198.7 Fu et al. (1997AJ....114.1623F)        
1989.2272 0.099 201.9 McAlister et al. (1990AJ.....99..965M)        
1990.2701 0.095 212.2 Hartkopf et al. (1992AJ....104..810H)        
1990.2756 0.097 212.4 Hartkopf et al. (1992AJ....104..810H)        
1991.3213 0.101 223.4 Hartkopf et al. (1994AJ....108.2299H)        
1991.3269 0.100 221.7 Hartkopf et al. (1994AJ....108.2299H)        
1991.9053 0.088 227.8 Hartkopf et al. (1994AJ....108.2299H)        
1992.3071 0.091 231.6 Hartkopf et al. (1994AJ....108.2299H)        
1993.1970 0.093 241.9 Hartkopf et al. (1994AJ....108.2299H)        
1997.074  0.121 276.0 Aristidi et al. (1999A&AS..134..545A)         
1998.430  0.120 286.0 Prieur et al. (2001A&A...367..865P)         
2007.3114 0.181 328.5 Hartkopf & Mason (2009AJ....138..813H)