Maxima for Z Cyg
Mean period: 263.86, GCVS period: 263.69

E O (JD) O (dat) Period
-130 2410354 1887-03-23 270.3
-128 2410854 1888-08-04 266.38
-127 2411146 1889-05-23 261.24
-125 2411674 1890-11-02 262.09
-124 2411953 1891-08-08 264.71
-123 2412192 1892-04-03 263.94
-122 2412447 1892-12-14 261.4
-121 2412720 1893-09-13 261.13
-120 2412988 1894-06-08 262.35
-119 2413235 1895-02-10 263.28
-118 2413506 1895-11-08 262.43
-117 2413777 1896-08-05 261.29
-116 2414041 1897-04-26 261.43
-115 2414284 1897-12-25 261.93
-114 2414557 1898-09-24 261.08
-113 2414809 1899-06-03 260.86
-112 2415074 1900-02-23 262.57
-111 2415334 1900-11-10 263.78
-110 2415604 1901-08-07 262.99
-109 2415866 1902-04-26 262.93
-108 2416135 1903-01-20 263.58
-107 2416399 1903-10-11 264.79
-106 2416649 1904-06-17 263.58
-105 2416915 1905-03-10 261
-104 2417183 1905-12-03 260.58
-103 2417462 1906-09-08 260.5
-102 2417698 1907-05-02 260.07
-101 2417957 1908-01-16 259.42
-100 2418225 1908-10-10 257.85
-99 2418470 1909-06-12 261.28
-98 2418735 1910-03-04 264.14
-97 2418995 1910-11-19 264.08
-96 2419260 1911-08-11 266.65
-95 2419558 1912-06-04 267.29
-94 2419795 1913-01-27 267.22
-93 2420084 1913-11-12 266.43
-92 2420344 1914-07-30 261.65
-91 2420603 1915-04-15 261.07
-90 2420868 1916-01-05 262.2
-89 2421117 1916-09-10 260.49
-88 2421364 1917-05-15 261.35
-87 2421644 1918-02-19 261.65
-86 2421906 1918-11-08 262.36
-85 2422169 1919-07-29 264.08
-84 2422437 1920-04-22 262.86
-83 2422697 1921-01-07 260.79
-82 2422961 1921-09-28 260.15
-81 2423217 1922-06-11 259.71
-80 2423471 1923-02-20 259.78
-79 2423730 1923-11-06 259.63
-78 2423987 1924-07-20 260
-77 2424255 1925-04-14 261.08
-76 2424516 1925-12-31 261.08
-75 2424777 1926-09-18 260.58
-74 2425041 1927-06-09 260.72
-73 2425302 1928-02-25 261.36
-72 2425554 1928-11-03 262.15
-71 2425811 1929-07-18 263.07
-70 2426081 1930-04-14 263.7
-69 2426349 1931-01-07 264.71
-68 2426614 1931-09-29 265.79
-67 2426887 1932-06-28 265.43
-66 2427148 1933-03-16 264.79
-65 2427414 1933-12-07 264.36
-64 2427672 1934-08-22 263.79
-63 2427936 1935-05-13 263.72
-62 2428201 1936-02-02 263.85
-61 2428463 1936-10-21 263.99
-60 2428731 1937-07-16 264.78
-59 2428996 1938-04-07 264.71
-58 2429260 1938-12-27 265.15
-57 2429522 1939-09-15 265.58
-56 2429793 1940-06-12 265
-55 2430050 1941-02-24 264.5
-54 2430326 1941-11-27 265.29
-53 2430586 1942-08-14 267.22
-52 2430851 1943-05-06 266.57
-51 2431108 1944-01-18 264.7
-50 2431388 1944-10-24 266.85
-49 2431668 1945-07-31 269.56
-48 2431907 1946-03-27 269.71
-47 2432175 1946-12-20 269.93
-46 2432473 1947-10-14 269.65
-45 2432738 1948-07-05 271.65
-44 2432997 1949-03-21 272.86
-43 2433278 1949-12-27 269.5
-42 2433553 1950-09-28 266.86
-41 2433825 1951-06-27 267
-40 2434077 1952-03-05 266.28
-39 2434344 1952-11-27 264.13
-38 2434603 1953-08-13 262.43
-37 2434870 1954-05-07 263.15
-36 2435133 1955-01-25 263.86
-35 2435396 1955-10-15 264.79
-34 2435656 1956-07-01 266.93
-33 2435930 1957-04-01 267.36
-32 2436185 1957-12-12 267.08
-31 2436469 1958-09-22 266.85
-30 2436741 1959-06-21 265.85
-29 2437005 1960-03-11 265.93
-28 2437263 1960-11-24 265.93
-27 2437525 1961-08-13 264.58
-26 2437783 1962-04-28 264.93
-25 2438055 1963-01-25 265.15
-24 2438322 1963-10-19 264.43
-23 2438592 1964-07-15 264.29
-22 2438863 1965-04-12 263.71
-21 2439117 1965-12-22 262.06
-20 2439373 1966-09-04 260.92
-19 2439635 1967-05-24 260.21
-18 2439895 1968-02-08 260.22
-17 2440151 1968-10-21 261.58
-16 2440416 1969-07-13 262.29
-15 2440682 1970-04-05 261.29
-14 2440941 1970-12-20 260.93
-13 2441211 1971-09-16 261
-12 2441469 1972-05-31 259.64
-11 2441719 1973-02-05 259.35
-10 2441980 1973-10-24 260.06
-9 2442241 1974-07-12 260
-8 2442492 1975-03-20 260.93
-7 2442762 1975-12-15 262.15
-6 2443031 1976-09-09 262.93
-5 2443289 1977-05-25 265.15
-4 2443552 1978-02-12 266.43
-3 2443817 1978-11-04 265.65
-2 2444085 1979-07-30 266.07
-1 2444360 1980-04-30 267.13
0 2444624 1981-01-19 266.56
1 2444888 1981-10-10 265.92
2 2445157 1982-07-06 264.64
3 2445424 1983-03-30 263.43
4 2445677 1983-12-08 263.58
5 2445948 1984-09-04 263.29
6 2446202 1985-05-16 261.22
7 2446470 1986-02-08 261.15
8 2446732 1986-10-28 262.15
9 2446999 1987-07-22 262.64
10 2447239 1988-03-18 263.78
11 2447518 1988-12-22 263.56
12 2447777 1989-09-07 263.57
13 2448050 1990-06-07 265
14 2448315 1991-02-27 265.58
15 2448577 1991-11-16 265.29
16 2448844 1992-08-09 265
17 2449104 1993-04-26 264.22
18 2449371 1994-01-18 264.79
19 2449638 1994-10-12 263.78
20 2449899 1995-06-30 263.63
21 2450165 1996-03-22 265.21
22 2450434 1996-12-16 265.08
23 2450680 1997-08-19 264.58
24 2450959 1998-05-25 264.58
25 2451229 1999-02-19 264.58
26 2451491 1999-11-08 265.29
27 2451750 2000-07-24 264.22
28 2452018 2001-04-18 261.78
29 2452285 2002-01-10 260.85
30 2452543 2002-09-25 260.35
31 2452795 2003-06-04 259.57
32 2453058 2004-02-22 258.5
33 2453314 2004-11-04 258.65
34 2453572 2005-07-20 260.15
35 2453830 2006-04-04 261.5
36 2454092 2006-12-22 261.93
37 2454357 2007-09-13 263.5
38 2454623 2008-06-05 264.71
39 2454891 2009-02-28 264.2
40 2455148 2009-11-12 264.2
41 2455427 2010-08-18 264.14
42 2455681 2011-04-29 263.65
43 2455940 2012-01-13 263.08
44 2456208 2012-10-07 261.72
45 2456470 2013-06-26 261.72
46 2456735 2014-03-18 262.79
47 2456987 2014-11-25 263.15
48 2457252 2015-08-17 263.35
49 2457520 2016-05-11 264.2
50 2457780 2017-01-26 265.85
51 2458052 2017-10-25 267.06
52 2458313 2018-07-13 267.14
53 2458591 2019-04-17 266.29
54 2458853 2020-01-04 264.79
55 2459125 2020-10-02 264.97
56 2459387 2021-06-21 265.38
57 2459641 2022-03-02 263.6
58 2459898 2022-11-14 263.92


E Cycle number from the GCVS4 epoch.
O (JD) Julian date at observed time for maximum.
O (Dat) Same as above, expressed as date.
Period Calculated mean period at cycle number E.