Maxima for Z Cyg
Period: 263.84, Epoch: 2444610.1
AAVSO offset: -3

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-130   2410354 1887-03-23 2410311 1887-02-08 43 AnHar, 1937, vol 105, p 459
-128   2410854 1888-08-04 2410838 1888-07-19 16 GuL, 1920, 1.2
-127   2411146 1889-05-23 2411102 1889-04-09 44 GuL, 1920, 1.2
-125   2411674 1890-11-02 2411630 1890-09-19 44 AnHar, 1909, vol 55, p 95
-124   2411953 1891-08-08 2411894 1891-06-10 59 AnHar, 1909, vol 55, p 95
-123   2412192 1892-04-03 2412158 1892-02-29 34 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 2412685 1893-08-09 35 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-120   2412988 1894-06-08 2412949 1894-04-30 39 GuL, 1920, 1.2, AnHar, 1909, vol 55, p 95
-119   2413235 1895-02-10 2413213 1895-01-19 22 GuL, 1920, 1.2
-118 9.0 2413506 1895-11-08 2413477 1895-10-10 29 SVO
-117   2413777 1896-08-05 2413741 1896-06-30 36 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 2414532 1898-08-30 25 GuL, 1920, 1.2
-113   2414809 1899-06-03 2414796 1899-05-21 13 GuL, 1920, 1.2, AnHar, 1952, vol 118
-112   2415074 1900-02-23 2415060 1900-02-09 14 GuL, 1920, 1.2
-111   2415334 1900-11-10 2415324 1900-10-31 10 GuL, 1920, 1.2
-110   2415604 1901-08-07 2415588 1901-07-22 16 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 2416379 1903-09-21 20 GuL, 1920, 1.2, AnHar, 1952, vol 118
-106 8.7 2416649 1904-06-17 2416643 1904-06-11 6 SVO
-105 8.9 2416915 1905-03-10 2416907 1905-03-02 8 SVO
-104 8.8 2417183 1905-12-03 2417171 1905-11-21 12 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 2418226 1908-10-11 -1 SVO
-99 8.7 2418470 1909-06-12 2418490 1909-07-02 -20 AAVSO
-98 8.9 2418735 1910-03-04 2418754 1910-03-23 -19 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 2420073 1913-11-01 11 AAVSO
-92 9.1 2420344 1914-07-30 2420337 1914-07-23 7 SVO
-91 9.0 2420603 1915-04-15 2420601 1915-04-13 2 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 2421920 1918-11-22 -14 SVO
-85 9.0 2422169 1919-07-29 2422184 1919-08-13 -15 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 2423767 1923-12-13 -37 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 2425614 1929-01-02 -60 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 2429043 1938-05-24 -47 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 2430626 1942-09-23 -40 SVO
-52 10.0 2430851 1943-05-06 2430890 1943-06-14 -39 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 2432473 1947-10-14 0 SVO
-45 8.2 2432738 1948-07-05 2432737 1948-07-04 1 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 2434056 1952-02-13 21 SVO
-39 9.3 2434344 1952-11-27 2434320 1952-11-03 24 SVO
-38 8.5 2434603 1953-08-13 2434584 1953-07-25 19 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 2435639 1956-06-14 17 SVO
-33 8.4 2435930 1957-04-01 2435903 1957-03-05 27 SVO
-32 8.5 2436185 1957-12-12 2436167 1957-11-24 18 SVO
-31 8.0 2436469 1958-09-22 2436431 1958-08-15 38 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 2437486 1961-07-05 39 SVO
-26 7.8 2437783 1962-04-28 2437750 1962-03-26 33 SVO
-25 8.7 2438055 1963-01-25 2438014 1962-12-15 41 SVO
-24 8.8 2438322 1963-10-19 2438278 1963-09-05 44 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 2439069 1965-11-04 48 SVO
-20 8.3 2439373 1966-09-04 2439333 1966-07-26 40 SVO
-19 9.1 2439635 1967-05-24 2439597 1967-04-16 38 SVO
-18 9.0 2439895 1968-02-08 2439861 1968-01-05 34 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 2440652 1970-03-06 30 SVO
-14 9.2 2440941 1970-12-20 2440916 1970-11-25 25 SVO
-13 8.9 2441211 1971-09-16 2441180 1971-08-16 31 SVO
-12 8.6 2441469 1972-05-31 2441444 1972-05-06 25 SVO
-11 8.7 2441719 1973-02-05 2441708 1973-01-25 11 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 2442499 1975-03-27 -7 SVO
-7 8.8 2442762 1975-12-15 2442763 1975-12-16 -1 SVO
-6 9.2 2443031 1976-09-09 2443027 1976-09-05 4 SVO
-5 8.7 2443289 1977-05-25 2443291 1977-05-27 -2 SVO
-4 8.4 2443552 1978-02-12 2443555 1978-02-15 -3 SVO
-3 8.2 2443817 1978-11-04 2443819 1978-11-06 -2 SVO
-2 8.6 2444085 1979-07-30 2444082 1979-07-27 3 SVO
-1 8.6 2444360 1980-04-30 2444346 1980-04-16 14 SVO
0 8.6 2444624 1981-01-19 2444610 1981-01-05 14 SVO
1 8.4 2444888 1981-10-10 2444874 1981-09-26 14 SVO
2 9.1 2445157 1982-07-06 2445138 1982-06-17 19 SVO
3 9.1 2445424 1983-03-30 2445402 1983-03-08 22 SVO
4 8.5 2445677 1983-12-08 2445665 1983-11-26 12 SVO
5 8.8 2445948 1984-09-04 2445929 1984-08-16 19 SVO
6 8.4 2446202 1985-05-16 2446193 1985-05-07 9 SVO
7 9.2 2446470 1986-02-08 2446457 1986-01-26 13 SVO
8 8.8 2446732 1986-10-28 2446721 1986-10-17 11 SVO
9 8.5 2446999 1987-07-22 2446985 1987-07-08 14 SVO
10 8.1 2447239 1988-03-18 2447249 1988-03-28 -10 SVO
11 9.2 2447518 1988-12-22 2447512 1988-12-16 6 SVO
12 8.3 2447777 1989-09-07 2447776 1989-09-06 1 SVO
13 8.8 2448050 1990-06-07 2448040 1990-05-28 10 SVO
14 8.8 2448315 1991-02-27 2448304 1991-02-16 11 SVO
15 8.4 2448577 1991-11-16 2448568 1991-11-07 9 SVO
16 9.2 2448844 1992-08-09 2448832 1992-07-28 12 SVO
17 8.6 2449104 1993-04-26 2449095 1993-04-17 9 SVO
18 8.7 2449371 1994-01-18 2449359 1994-01-06 12 SVO
19 9.2 2449638 1994-10-12 2449623 1994-09-27 15 SVO
20 8.5 2449899 1995-06-30 2449887 1995-06-18 12 SVO
21 9.3 2450165 1996-03-22 2450151 1996-03-08 14 SVO
22 9.8 2450434 1996-12-16 2450415 1996-11-27 19 SVO
23 8.6 2450680 1997-08-19 2450678 1997-08-17 2 SVO
24 9.2 2450959 1998-05-25 2450942 1998-05-08 17 SVO
25 8.8 2451229 1999-02-19 2451206 1999-01-27 23 SVO
26 8.8 2451491 1999-11-08 2451470 1999-10-18 21 SVO
27 8.6 2451750 2000-07-24 2451734 2000-07-08 16 SVO
28 8.5 2452018 2001-04-18 2451998 2001-03-29 20 SVO
29 8.6 2452285 2002-01-10 2452262 2001-12-18 23 SVO
30 8.6 2452543 2002-09-25 2452525 2002-09-07 18 SVO
31 8.5 2452795 2003-06-04 2452789 2003-05-29 6 SVO
32 9.1 2453058 2004-02-22 2453053 2004-02-17 5 SVO
33 8.3 2453314 2004-11-04 2453317 2004-11-07 -3 SVO
34 9.2 2453572 2005-07-20 2453581 2005-07-29 -9 SVO
35 8.7 2453830 2006-04-04 2453845 2006-04-19 -15 SVO
36 9.4 2454092 2006-12-22 2454108 2007-01-07 -16 SVO
37 8.8 2454357 2007-09-13 2454372 2007-09-28 -15 SVO
38 8.1 2454623 2008-06-05 2454636 2008-06-18 -13 SVO
39 9.5 2454891 2009-02-28 2454900 2009-03-09 -9 SVO
40 8.9 2455148 2009-11-12 2455164 2009-11-28 -16 SVO
41 8.7 2455427 2010-08-18 2455428 2010-08-19 -1 SVO
42 8.8 2455681 2011-04-29 2455691 2011-05-09 -10 SVO
43 8.0 2455940 2012-01-13 2455955 2012-01-28 -15 SVO
44 9.1 2456208 2012-10-07 2456219 2012-10-18 -11 SVO
45 8.8 2456470 2013-06-26 2456483 2013-07-09 -13 SVO
46 9.2 2456735 2014-03-18 2456747 2014-03-30 -12 SVO
47 8.3 2456987 2014-11-25 2457011 2014-12-19 -24 SVO
48 8.1 2457252 2015-08-17 2457274 2015-09-08 -22 SVO
49 8.5 2457520 2016-05-11 2457538 2016-05-29 -18 SVO
50 8.2 2457780 2017-01-26 2457802 2017-02-17 -22 SVO
51 9.1 2458052 2017-10-25 2458066 2017-11-08 -14 SVO
52 8.8 2458313 2018-07-13 2458330 2018-07-30 -17 SVO
53 8.5 2458591 2019-04-17 2458594 2019-04-20 -3 SVO
54 8.2 2458853 2020-01-04 2458858 2020-01-09 -5 SVO
55 8.5 2459125 2020-10-02 2459121 2020-09-28 4 SVO
56 8.6 2459387 2021-06-21 2459385 2021-06-19 2 SVO
57 8.2 2459641 2022-03-02 2459649 2022-03-10 -8 SVO
58 8.6 2459898 2022-11-14 2459913 2022-11-29 -15 SVO
59 7.9 2460150 2023-07-24 2460177 2023-08-20 -27 SVO
60 8.2 2460416 2024-04-15 2460441 2024-05-10 -25 SVO
61 8.2 2460673 2024-12-28 2460704 2025-01-28 -31 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.