CATALOGUE OF BINARY STARS. 



225 



e Equulei (continued). 



A: C. c =7^, blue. 



Herschel.... 



South 



Smyth 



Secchi 



Dembowski 

 Secchi 



Epoch. 



P. 



D. 



1780-59 





 84-21 



9'37 



1823-58 



79-21 



12-37 



1833-77 



77-60 



10-70 



1838-83 



78-10 



11-20 



1855-87 



73-93 



10-55 



1862-64 



76-17 



10-83 



1866-70 



73-13 



IO-55 



61 Cygni. 



2 2758. 



E. A. 21^^ o"" 41=. 



Dec. N, 38° 3' 54". 



Mags, a =5^, 6 =6. 

 Colours: Smyth, 1839, both yellow; 

 Webb, 1850, both deep yellow; 

 Main, 1861, both yellow. 



Bradley . 

 Mayer.... 

 Herschel. 

 Piazzi .... 



Struve. 

 South . 

 Dawes. 

 Smyth. 



Secchi 



Maiu 



Dembowski 



1753-80 

 1778-00 

 1780-72 

 i8oo-oo 

 1812-30 

 1819-90 

 1822-90 

 1830-66 

 1839-69 

 1848-07 

 1853-80 

 1855-99 

 1861-85 

 1865-15 



Knott 11866-72 



35"24 

 50-58 

 53"32 

 69-18 

 79-07 

 83-02 

 84-41 

 90-20 

 96-30 

 99-80 

 103-70 



io5"93 

 107-42 

 110-64 

 III-69 



119-63 

 15-24 

 i6-o8 



l8-20 



16-74 

 15-20 



i5'43 

 15-70 

 16-30 

 16-40 

 17-00 

 17-94 

 17-89 

 18-55 

 18-76 



Orbital period, about 540 years 

 (Smyth). 



A. Z. XXIV. 11. 



A. C. 19. 



E. A. (i860), 21I1 10™ 50^ 

 Dec. N. 63° 49' 48". 

 Mags, a =7^,b =7^. 

 Colours : both pale yellow. 



Struve, O. 

 Dawes 



i843± 

 1860-12 

 1866-83 



Single. 

 246-25 j 0-89 

 244-53 I 0-98 



20 Peqasi. S 2799. 



E. A. (i860), 21^ 22"^ 24S. 



Dec. N. 10° 28'. 



Mags, a =6^, b =7^. 

 Colours: Secchi, 1856, pale yellow. 





Epoch. 



P. 



D. 



Struve 



1831-82 

 1835-81 

 1854-74 

 1856-27 

 1863-09 



332-88 

 332-90 



320-31 

 320-70 

 317-57 



1-35 

 1-39 

 i-i8 



Madler 



Dawes 



Secchi 



1-23 



1-44 



Dembowski .. 



P. XXII. 33 Pegasi. S 2877. 



E. A. (i860) 22^^ 71^42^. 



Dec. N. 16° 30'. 



Mags, a —6i,b =9^. 

 Colours: Secchi, 1857, yellow, blue. 



Struve 11828-95 



Madler 1836-57 



Secchi 1857-35 



Dembowski ..|i 863-67 



S Aquaeii. s 2909. 



E. A. 22I1 21™ 53S. 



Dec. S. 0° 42' 37". 



Mags, ffi =4, 6 =4^. 

 Colovirs: Smyth, 1842, very white, 

 white: Webb, 185 1, both p. yell. 



316-45 



7-63 



322-40 



7-83 



337-45 



8-56 



342-20 



8-99 



Herschel 

 Piazzi ...' 

 Struve..., 

 Smyth..., 



Main 



Dembowski 



Secchi 



Knott 



Dawes 



1779-70 

 i8oo-oo 

 1820-92 

 1831-83 

 1842-59 

 1852-81 

 1861-78 

 1863-14 

 1866-70 

 1866-71 

 1866-99 



Orbital period, about 750 years 

 (Smyth). 



I I8-2I 



I o-oo 



358-18 



356-00 



348-90 



346-90 



340-43 

 339-04 



347-83 

 337-01 



336-33 



4-56 



3-± 

 4-40 

 3-60 

 2-70 

 3-20 

 3-28 

 3-52 

 3-38 

 3-64 

 3"32 



37 Pegasi. 2 2912. 



E. A. 22'! 23™ 9S. 



Dee. N. 3° 44' 54". 



Mags, a =6, b =j^. 

 Colours: Smyth, 1839, both white; 

 Secchi, 1857, both white. 



1831-121112-63 1-16 

 i-io 

 0-91 



0-74 



Struve 

 Smyth 

 Dawes 

 Secchi 



1839-60 

 1854-54 

 1857-09 



Orbital period, about 500 years 

 (Smyth). 



118-90 

 118-53 

 117-56 



