Maxima for Z Cyg
Period: 263.86, Epoch: 2444611.1
AAVSO offset: -3

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-130   2410354 1887-03-23 2410310 1887-02-07 44 AnHar, 1937, vol 105, p 459
-128   2410854 1888-08-04 2410837 1888-07-18 17 GuL, 1920, 1.2
-127   2411146 1889-05-23 2411101 1889-04-08 45 GuL, 1920, 1.2
-125   2411674 1890-11-02 2411629 1890-09-18 45 AnHar, 1909, vol 55, p 95
-124   2411953 1891-08-08 2411893 1891-06-09 60 AnHar, 1909, vol 55, p 95
-123   2412192 1892-04-03 2412157 1892-02-28 35 AnHar, 1909, vol 55, p 95
-122   2412447 1892-12-14 2412421 1892-11-18 26 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-121   2412720 1893-09-13 2412684 1893-08-08 36 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-120   2412988 1894-06-08 2412948 1894-04-29 40 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-119   2413235 1895-02-10 2413212 1895-01-18 23 GuL, 1920, 1.2
-118 9.0 2413506 1895-11-08 2413476 1895-10-09 30 SVO
-117   2413777 1896-08-05 2413740 1896-06-29 37 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-116   2414041 1897-04-26 2414004 1897-03-20 37 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-115   2414284 1897-12-25 2414268 1897-12-09 16 GuL, 1920, 1.2
-114   2414557 1898-09-24 2414531 1898-08-29 26 GuL, 1920, 1.2
-113   2414809 1899-06-03 2414795 1899-05-20 14 GuL, 1920, 1.2, AnHar, 1952, vol 118
-112   2415074 1900-02-23 2415059 1900-02-08 15 GuL, 1920, 1.2
-111   2415334 1900-11-10 2415323 1900-10-30 11 GuL, 1920, 1.2
-110   2415604 1901-08-07 2415587 1901-07-21 17 AnHar, 1952, vol 118, GuL, 1920, 1.2
-109   2415866 1902-04-26 2415851 1902-04-11 15 GuL, 1920, 1.2, AnHar, 1952, vol 118
-108   2416135 1903-01-20 2416115 1902-12-31 20 AnHar, 1952, vol 118, GuL, 1920, 1.2
-107   2416399 1903-10-11 2416378 1903-09-20 21 GuL, 1920, 1.2, AnHar, 1952, vol 118
-106 8.7 2416649 1904-06-17 2416642 1904-06-10 7 SVO
-105 8.9 2416915 1905-03-10 2416906 1905-03-01 9 SVO
-104 8.8 2417183 1905-12-03 2417170 1905-11-20 13 SVO
-103 9.0 2417462 1906-09-08 2417434 1906-08-11 28 SVO
-102 8.8 2417698 1907-05-02 2417698 1907-05-02 0 AAVSO
-101 8.8 2417957 1908-01-16 2417962 1908-01-21 -5 SVO
-100 9.4 2418225 1908-10-10 2418225 1908-10-10 0 SVO
-99 8.7 2418470 1909-06-12 2418489 1909-07-01 -19 AAVSO
-98 8.9 2418735 1910-03-04 2418753 1910-03-22 -18 AAVSO
-97 8.7 2418995 1910-11-19 2419017 1910-12-11 -22 SVO
-96   2419260 1911-08-11 2419281 1911-09-01 -21 AnHar, 1952, vol 118
-95   2419558 1912-06-04 2419545 1912-05-22 13 AAVSO
-94   2419795 1913-01-27 2419809 1913-02-10 -14 AJ, 1915, vol 29, p 47
-93 8.5 2420084 1913-11-12 2420072 1913-10-31 12 AAVSO
-92 9.1 2420344 1914-07-30 2420336 1914-07-22 8 SVO
-91 9.0 2420603 1915-04-15 2420600 1915-04-12 3 SVO
-90 8.7 2420868 1916-01-05 2420864 1916-01-01 4 AAVSO
-89 8.5 2421117 1916-09-10 2421128 1916-09-21 -11 SVO
-88 8.4 2421364 1917-05-15 2421392 1917-06-12 -28 SVO
-87 9.6 2421644 1918-02-19 2421656 1918-03-03 -12 SVO
-86 8.8 2421906 1918-11-08 2421919 1918-11-21 -13 SVO
-85 9.0 2422169 1919-07-29 2422183 1919-08-12 -14 SVO
-84 8.5 2422437 1920-04-22 2422447 1920-05-02 -10 AAVSO
-83 9.1 2422697 1921-01-07 2422711 1921-01-21 -14 SVO
-82 8.9 2422961 1921-09-28 2422975 1921-10-12 -14 SVO
-81 9.5 2423217 1922-06-11 2423239 1922-07-03 -22 SVO
-80 8.9 2423471 1923-02-20 2423503 1923-03-24 -32 SVO
-79 9.9 2423730 1923-11-06 2423766 1923-12-12 -36 SVO
-78 9.5 2423987 1924-07-20 2424030 1924-09-01 -43 SVO
-77 9.1 2424255 1925-04-14 2424294 1925-05-23 -39 SVO
-76 8.4 2424516 1925-12-31 2424558 1926-02-11 -42 SVO
-75 8.6 2424777 1926-09-18 2424822 1926-11-02 -45 SVO
-74 8.4 2425041 1927-06-09 2425086 1927-07-24 -45 SVO
-73 8.3 2425302 1928-02-25 2425350 1928-04-13 -48 SVO
-72 8.3 2425554 1928-11-03 2425613 1929-01-01 -59 SVO
-71 8.1 2425811 1929-07-18 2425877 1929-09-22 -66 SVO
-70 9.3 2426081 1930-04-14 2426141 1930-06-13 -60 SVO
-69 8.9 2426349 1931-01-07 2426405 1931-03-04 -56 SVO
-68 8.9 2426614 1931-09-29 2426669 1931-11-23 -55 SVO
-67 9.0 2426887 1932-06-28 2426933 1932-08-13 -46 SVO
-66 7.7 2427148 1933-03-16 2427197 1933-05-04 -49 SVO
-65 8.8 2427414 1933-12-07 2427460 1934-01-22 -46 SVO
-64 8.4 2427672 1934-08-22 2427724 1934-10-13 -52 SVO
-63 8.5 2427936 1935-05-13 2427988 1935-07-04 -52 SVO
-62 8.6 2428201 1936-02-02 2428252 1936-03-24 -51 SVO
-61 7.9 2428463 1936-10-21 2428516 1936-12-13 -53 SVO
-60 9.2 2428731 1937-07-16 2428780 1937-09-03 -49 SVO
-59 9.3 2428996 1938-04-07 2429044 1938-05-25 -48 AAVSO
-58 8.8 2429260 1938-12-27 2429307 1939-02-12 -47 SVO
-57 9.1 2429522 1939-09-15 2429571 1939-11-03 -49 SVO
-56 8.6 2429793 1940-06-12 2429835 1940-07-24 -42 SVO
-55 8.2 2430050 1941-02-24 2430099 1941-04-14 -49 SVO
-54 8.6 2430326 1941-11-27 2430363 1942-01-03 -37 SVO
-53 8.3 2430586 1942-08-14 2430627 1942-09-24 -41 SVO
-52 10.0 2430851 1943-05-06 2430891 1943-06-15 -40 AAVSO
-51 8.2 2431108 1944-01-18 2431154 1944-03-04 -46 SVO
-50 8.3 2431388 1944-10-24 2431418 1944-11-23 -30 SVO
-49 8.2 2431668 1945-07-31 2431682 1945-08-14 -14 SVO
-48 8.2 2431907 1946-03-27 2431946 1946-05-05 -39 AAVSO
-47 8.0 2432175 1946-12-20 2432210 1947-01-24 -35 AAVSO
-46 8.9 2432473 1947-10-14 2432474 1947-10-15 -1 SVO
-45 8.2 2432738 1948-07-05 2432738 1948-07-05 0 SVO
-44 8.5 2432997 1949-03-21 2433001 1949-03-25 -4 AAVSO
-43 8.0 2433278 1949-12-27 2433265 1949-12-14 13 SVO
-42 8.1 2433553 1950-09-28 2433529 1950-09-04 24 SVO
-41 9.2 2433825 1951-06-27 2433793 1951-05-26 32 SVO
-40 8.6 2434077 1952-03-05 2434057 1952-02-14 20 SVO
-39 9.3 2434344 1952-11-27 2434321 1952-11-04 23 SVO
-38 8.5 2434603 1953-08-13 2434585 1953-07-26 18 SVO
-37 8.7 2434870 1954-05-07 2434848 1954-04-15 22 AAVSO
-36 8.4 2435133 1955-01-25 2435112 1955-01-04 21 SVO
-35 8.1 2435396 1955-10-15 2435376 1955-09-25 20 SVO
-34 8.2 2435656 1956-07-01 2435640 1956-06-15 16 SVO
-33 8.4 2435930 1957-04-01 2435904 1957-03-06 26 SVO
-32 8.5 2436185 1957-12-12 2436168 1957-11-25 17 SVO
-31 8.0 2436469 1958-09-22 2436432 1958-08-16 37 SVO
-30 8.9 2436741 1959-06-21 2436695 1959-05-06 46 SVO
-29 8.5 2437005 1960-03-11 2436959 1960-01-25 46 AAVSO
-28 9.2 2437263 1960-11-24 2437223 1960-10-15 40 SVO
-27 8.8 2437525 1961-08-13 2437487 1961-07-06 38 SVO
-26 7.8 2437783 1962-04-28 2437751 1962-03-27 32 SVO
-25 8.7 2438055 1963-01-25 2438015 1962-12-16 40 SVO
-24 8.8 2438322 1963-10-19 2438279 1963-09-06 43 SVO
-23 8.5 2438592 1964-07-15 2438542 1964-05-26 50 SVO
-22 8.2 2438863 1965-04-12 2438806 1965-02-14 57 SVO
-21 8.6 2439117 1965-12-22 2439070 1965-11-05 47 SVO
-20 8.3 2439373 1966-09-04 2439334 1966-07-27 39 SVO
-19 9.1 2439635 1967-05-24 2439598 1967-04-17 37 SVO
-18 9.0 2439895 1968-02-08 2439862 1968-01-06 33 SVO
-17 8.2 2440151 1968-10-21 2440125 1968-09-25 26 SVO
-16 9.2 2440416 1969-07-13 2440389 1969-06-16 27 SVO
-15 9.2 2440682 1970-04-05 2440653 1970-03-07 29 SVO
-14 9.2 2440941 1970-12-20 2440917 1970-11-26 24 SVO
-13 8.9 2441211 1971-09-16 2441181 1971-08-17 30 SVO
-12 8.6 2441469 1972-05-31 2441445 1972-05-07 24 SVO
-11 8.7 2441719 1973-02-05 2441709 1973-01-26 10 SVO
-10 8.8 2441980 1973-10-24 2441972 1973-10-16 8 SVO
-9 9.3 2442241 1974-07-12 2442236 1974-07-07 5 SVO
-8 9.1 2442492 1975-03-20 2442500 1975-03-28 -8 SVO
-7 8.8 2442762 1975-12-15 2442764 1975-12-17 -2 SVO
-6 9.2 2443031 1976-09-09 2443028 1976-09-06 3 SVO
-5 8.7 2443289 1977-05-25 2443292 1977-05-28 -3 SVO
-4 8.4 2443552 1978-02-12 2443556 1978-02-16 -4 SVO
-3 8.2 2443817 1978-11-04 2443819 1978-11-06 -2 SVO
-2 8.6 2444085 1979-07-30 2444083 1979-07-28 2 SVO
-1 8.6 2444360 1980-04-30 2444347 1980-04-17 13 SVO
0 8.6 2444624 1981-01-19 2444611 1981-01-06 13 SVO
1 8.4 2444888 1981-10-10 2444875 1981-09-27 13 SVO
2 9.1 2445157 1982-07-06 2445139 1982-06-18 18 SVO
3 9.1 2445424 1983-03-30 2445403 1983-03-09 21 SVO
4 8.5 2445677 1983-12-08 2445666 1983-11-27 11 SVO
5 8.8 2445948 1984-09-04 2445930 1984-08-17 18 SVO
6 8.4 2446202 1985-05-16 2446194 1985-05-08 8 SVO
7 9.2 2446470 1986-02-08 2446458 1986-01-27 12 SVO
8 8.8 2446732 1986-10-28 2446722 1986-10-18 10 SVO
9 8.5 2446999 1987-07-22 2446986 1987-07-09 13 SVO
10 8.1 2447239 1988-03-18 2447250 1988-03-29 -11 SVO
11 9.2 2447518 1988-12-22 2447513 1988-12-17 5 SVO
12 8.3 2447777 1989-09-07 2447777 1989-09-07 0 SVO
13 8.8 2448050 1990-06-07 2448041 1990-05-29 9 SVO
14 8.8 2448315 1991-02-27 2448305 1991-02-17 10 SVO
15 8.4 2448577 1991-11-16 2448569 1991-11-08 8 SVO
16 9.2 2448844 1992-08-09 2448833 1992-07-29 11 SVO
17 8.6 2449104 1993-04-26 2449097 1993-04-19 7 SVO
18 8.7 2449371 1994-01-18 2449360 1994-01-07 11 SVO
19 9.2 2449638 1994-10-12 2449624 1994-09-28 14 SVO
20 8.5 2449899 1995-06-30 2449888 1995-06-19 11 SVO
21 9.3 2450165 1996-03-22 2450152 1996-03-09 13 SVO
22 9.8 2450434 1996-12-16 2450416 1996-11-28 18 SVO
23 8.6 2450680 1997-08-19 2450680 1997-08-19 0 SVO
24 9.2 2450959 1998-05-25 2450944 1998-05-10 15 SVO
25 8.8 2451229 1999-02-19 2451207 1999-01-28 22 SVO
26 8.8 2451491 1999-11-08 2451471 1999-10-19 20 SVO
27 8.6 2451750 2000-07-24 2451735 2000-07-09 15 SVO
28 8.5 2452018 2001-04-18 2451999 2001-03-30 19 SVO
29 8.6 2452285 2002-01-10 2452263 2001-12-19 22 SVO
30 8.6 2452543 2002-09-25 2452527 2002-09-09 16 SVO
31 8.5 2452795 2003-06-04 2452791 2003-05-31 4 SVO
32 9.1 2453058 2004-02-22 2453054 2004-02-18 4 SVO
33 8.3 2453314 2004-11-04 2453318 2004-11-08 -4 SVO
34 9.2 2453572 2005-07-20 2453582 2005-07-30 -10 SVO
35 8.7 2453830 2006-04-04 2453846 2006-04-20 -16 SVO
36 9.4 2454092 2006-12-22 2454110 2007-01-09 -18 SVO
37 8.8 2454357 2007-09-13 2454374 2007-09-30 -17 SVO
38 8.1 2454623 2008-06-05 2454638 2008-06-20 -15 SVO
39 9.5 2454891 2009-02-28 2454901 2009-03-10 -10 SVO
40 8.9 2455148 2009-11-12 2455165 2009-11-29 -17 SVO
41 8.7 2455427 2010-08-18 2455429 2010-08-20 -2 SVO
42 8.8 2455681 2011-04-29 2455693 2011-05-11 -12 SVO
43 8.0 2455940 2012-01-13 2455957 2012-01-30 -17 SVO
44 9.1 2456208 2012-10-07 2456221 2012-10-20 -13 SVO
45 8.8 2456470 2013-06-26 2456485 2013-07-11 -15 SVO
46 9.2 2456735 2014-03-18 2456748 2014-03-31 -13 SVO
47 8.3 2456987 2014-11-25 2457012 2014-12-20 -25 SVO
48 8.1 2457252 2015-08-17 2457276 2015-09-10 -24 SVO
49 8.5 2457520 2016-05-11 2457540 2016-05-31 -20 SVO
50 8.2 2457780 2017-01-26 2457804 2017-02-19 -24 SVO
51 9.1 2458052 2017-10-25 2458068 2017-11-10 -16 SVO
52 8.8 2458313 2018-07-13 2458332 2018-08-01 -19 SVO
53 8.5 2458591 2019-04-17 2458595 2019-04-21 -4 SVO
54 8.2 2458853 2020-01-04 2458859 2020-01-10 -6 SVO
55 8.5 2459125 2020-10-02 2459123 2020-09-30 2 SVO
56 8.6 2459387 2021-06-21 2459387 2021-06-21 0 SVO
57 8.2 2459641 2022-03-02 2459651 2022-03-12 -10 SVO
58 8.6 2459898 2022-11-14 2459915 2022-12-01 -17 SVO


E Cycle number from the GCVS4 epoch.
Mag Magnitude at maximum.
O (JD) Julian date at observed time for maximum.
O (Dat) Same as above, expressed as date.
C (JD) Julian date at calculated time for maximum with elements from GCVS4.
C (Dat) Same as above, expressed as date.
O-C O (JD) minus C (JD).
Sorce Datasource for the maxima.