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

E O (JD) O (dat) Period
-130 2410354 1887-03-23 265.5
-128 2410854 1888-08-04 263.96
-127 2411146 1889-05-23 263.74
-125 2411674 1890-11-02 263.83
-124 2411953 1891-08-08 263.17
-123 2412192 1892-04-03 263.06
-122 2412447 1892-12-14 263.45
-121 2412720 1893-09-13 262.39
-120 2412988 1894-06-08 261.73
-119 2413235 1895-02-10 261.84
-118 2413506 1895-11-08 262.41
-117 2413777 1896-08-05 262.1
-116 2414041 1897-04-26 261.32
-115 2414284 1897-12-25 261.45
-114 2414557 1898-09-24 261.9
-113 2414809 1899-06-03 261.88
-112 2415074 1900-02-23 262.28
-111 2415334 1900-11-10 262.53
-110 2415604 1901-08-07 263.15
-109 2415866 1902-04-26 263.09
-108 2416135 1903-01-20 264.25
-107 2416399 1903-10-11 263.46
-106 2416649 1904-06-17 262.65
-105 2416915 1905-03-10 261.98
-104 2417183 1905-12-03 260.9
-103 2417462 1906-09-08 260.1
-102 2417698 1907-05-02 259.71
-101 2417957 1908-01-16 259.76
-100 2418225 1908-10-10 260.99
-99 2418470 1909-06-12 261.05
-98 2418735 1910-03-04 262.69
-97 2418995 1910-11-19 264.99
-96 2419260 1911-08-11 265.74
-95 2419558 1912-06-04 266.25
-94 2419795 1913-01-27 266.23
-93 2420084 1913-11-12 264.51
-92 2420344 1914-07-30 263.66
-91 2420603 1915-04-15 262.46
-90 2420868 1916-01-05 261.21
-89 2421117 1916-09-10 261.95
-88 2421364 1917-05-15 261.25
-87 2421644 1918-02-19 261.95
-86 2421906 1918-11-08 262.3
-85 2422169 1919-07-29 262.21
-84 2422437 1920-04-22 262.27
-83 2422697 1921-01-07 261.58
-82 2422961 1921-09-28 260.45
-81 2423217 1922-06-11 260.18
-80 2423471 1923-02-20 259.95
-79 2423730 1923-11-06 259.97
-78 2423987 1924-07-20 260.36
-77 2424255 1925-04-14 260.35
-76 2424516 1925-12-31 260.44
-75 2424777 1926-09-18 260.85
-74 2425041 1927-06-09 261.27
-73 2425302 1928-02-25 261.7
-72 2425554 1928-11-03 262.34
-71 2425811 1929-07-18 263.09
-70 2426081 1930-04-14 263.87
-69 2426349 1931-01-07 264.27
-68 2426614 1931-09-29 264.75
-67 2426887 1932-06-28 265.2
-66 2427148 1933-03-16 264.95
-65 2427414 1933-12-07 264.45
-64 2427672 1934-08-22 264.17
-63 2427936 1935-05-13 264.02
-62 2428201 1936-02-02 263.76
-61 2428463 1936-10-21 264.28
-60 2428731 1937-07-16 264.3
-59 2428996 1938-04-07 264.99
-58 2429260 1938-12-27 265.1
-57 2429522 1939-09-15 265.16
-56 2429793 1940-06-12 264.86
-55 2430050 1941-02-24 265.15
-54 2430326 1941-11-27 266.2
-53 2430586 1942-08-14 265.86
-52 2430851 1943-05-06 265.65
-51 2431108 1944-01-18 266.76
-50 2431388 1944-10-24 267.88
-49 2431668 1945-07-31 268.02
-48 2431907 1946-03-27 269.19
-47 2432175 1946-12-20 270.21
-46 2432473 1947-10-14 271.07
-45 2432738 1948-07-05 270.37
-44 2432997 1949-03-21 270.09
-43 2433278 1949-12-27 269.98
-42 2433553 1950-09-28 268.36
-41 2433825 1951-06-27 266.38
-40 2434077 1952-03-05 265.72
-39 2434344 1952-11-27 264.75
-38 2434603 1953-08-13 263.85
-37 2434870 1954-05-07 263.19
-36 2435133 1955-01-25 264.02
-35 2435396 1955-10-15 265.54
-34 2435656 1956-07-01 266.29
-33 2435930 1957-04-01 266.72
-32 2436185 1957-12-12 266.65
-31 2436469 1958-09-22 266.3
-30 2436741 1959-06-21 266.18
-29 2437005 1960-03-11 265.98
-28 2437263 1960-11-24 265.64
-27 2437525 1961-08-13 265.86
-26 2437783 1962-04-28 264.88
-25 2438055 1963-01-25 264.37
-24 2438322 1963-10-19 264.21
-23 2438592 1964-07-15 263.95
-22 2438863 1965-04-12 263.14
-21 2439117 1965-12-22 262.4
-20 2439373 1966-09-04 261.55
-19 2439635 1967-05-24 260.95
-18 2439895 1968-02-08 260.95
-17 2440151 1968-10-21 261.14
-16 2440416 1969-07-13 261.32
-15 2440682 1970-04-05 261.25
-14 2440941 1970-12-20 260.99
-13 2441211 1971-09-16 260.35
-12 2441469 1972-05-31 260.2
-11 2441719 1973-02-05 260.17
-10 2441980 1973-10-24 260.15
-9 2442241 1974-07-12 260.46
-8 2442492 1975-03-20 260.86
-7 2442762 1975-12-15 262.03
-6 2443031 1976-09-09 263.64
-5 2443289 1977-05-25 264.6
-4 2443552 1978-02-12 265.39
-3 2443817 1978-11-04 266.21
-2 2444085 1979-07-30 266.35
-1 2444360 1980-04-30 266.05
0 2444624 1981-01-19 266.25
1 2444888 1981-10-10 265.55
2 2445157 1982-07-06 264.9
3 2445424 1983-03-30 264.08
4 2445677 1983-12-08 263.52
5 2445948 1984-09-04 262.37
6 2446202 1985-05-16 262.14
7 2446470 1986-02-08 261.76
8 2446732 1986-10-28 262.21
9 2446999 1987-07-22 262.96
10 2447239 1988-03-18 263.15
11 2447518 1988-12-22 263.88
12 2447777 1989-09-07 263.96
13 2448050 1990-06-07 264.42
14 2448315 1991-02-27 264.93
15 2448577 1991-11-16 265.45
16 2448844 1992-08-09 264.78
17 2449104 1993-04-26 264.96
18 2449371 1994-01-18 263.95
19 2449638 1994-10-12 264.11
20 2449899 1995-06-30 264.55
21 2450165 1996-03-22 264.71
22 2450434 1996-12-16 264.71
23 2450680 1997-08-19 264.65
24 2450959 1998-05-25 264.81
25 2451229 1999-02-19 264.76
26 2451491 1999-11-08 264
27 2451750 2000-07-24 263.37
28 2452018 2001-04-18 262.75
29 2452285 2002-01-10 261.1
30 2452543 2002-09-25 260.1
31 2452795 2003-06-04 259.64
32 2453058 2004-02-22 259.48
33 2453314 2004-11-04 259.49
34 2453572 2005-07-20 260.18
35 2453830 2006-04-04 261
36 2454092 2006-12-22 262.55
37 2454357 2007-09-13 263.16
38 2454623 2008-06-05 263.66
39 2454891 2009-02-28 264.11
40 2455148 2009-11-12 264.23
41 2455427 2010-08-18 264.12
42 2455681 2011-04-29 263.35
43 2455940 2012-01-13 262.75
44 2456208 2012-10-07 262.54
45 2456470 2013-06-26 262.42
46 2456735 2014-03-18 262.42
47 2456987 2014-11-25 263.1
48 2457252 2015-08-17 264.04
49 2457520 2016-05-11 264.55
50 2457780 2017-01-26 265.57
51 2458052 2017-10-25 266.27
52 2458313 2018-07-13 266.45
53 2458591 2019-04-17 265.65
54 2458853 2020-01-04 265.47
55 2459125 2020-10-02 265.35
56 2459387 2021-06-21 264.55
57 2459641 2022-03-02 263.89
58 2459898 2022-11-14 261.74


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.