Maxima for Z Del
Period: 304.69, Epoch: 2442338.2
AAVSO offset: -2

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-144   2398539 1854-11-16 2398463 1854-09-01 76 AnHar, 1937, vol 105, p 459
-143   2398837 1855-09-10 2398768 1855-07-03 69 GuL, 1920, 1.2
-94   2413701 1896-05-21 2413698 1896-05-18 3 AnHar, 1909, vol 55, p 95
-93   2413995 1897-03-11 2414002 1897-03-18 -7 AnHar, 1909, vol 55, p 95
-90   2414920 1899-09-22 2414916 1899-09-18 4 AnHar, 1952, vol 118
-89   2415230 1900-07-29 2415221 1900-07-20 9 AnHar, 1909, vol 55, p 95
-86   2416138 1903-01-23 2416135 1903-01-20 3 AnHar, 1909, vol 55, p 95
-85   2416438 1903-11-19 2416440 1903-11-21 -2 AnHar, 1909, vol 55, p 95
-84   2416743 1904-09-19 2416744 1904-09-20 -1 AAVSO
-83 9.0 2417054 1905-07-27 2417049 1905-07-22 5 AAVSO
-82 8.6 2417347 1906-05-16 2417354 1906-05-23 -7 AAVSO
-81   2417659 1907-03-24 2417659 1907-03-24 0 AAVSO
-80   2417968 1908-01-27 2417963 1908-01-22 5 AAVSO
-79   2418287 1908-12-11 2418268 1908-11-22 19 AAVSO
-78 8.2 2418574 1909-09-24 2418573 1909-09-23 1 AAVSO
-77   2418880 1910-07-27 2418877 1910-07-24 3 AAVSO
-76   2419188 1911-05-31 2419182 1911-05-25 6 AAVSO
-73   2420126 1913-12-24 2420096 1913-11-24 30 AAVSO
-72 8.6 2420425 1914-10-19 2420401 1914-09-25 24 AAVSO
-71 9.0 2420725 1915-08-15 2420705 1915-07-26 20 AAVSO
-70 8.9 2421035 1916-06-20 2421010 1916-05-26 25 SVO
-69 9.1 2421335 1917-04-16 2421315 1917-03-27 20 AAVSO
-68 9.5 2421647 1918-02-22 2421619 1918-01-25 28 AAVSO
-67   2421961 1919-01-02 2421924 1918-11-26 37 AAVSO
-66 9.4 2422251 1919-10-19 2422229 1919-09-27 22 AAVSO
-65 9.0 2422562 1920-08-25 2422534 1920-07-28 28 SVO
-64 9.5 2422850 1921-06-09 2422838 1921-05-28 12 AAVSO
-63 8.9 2423162 1922-04-17 2423143 1922-03-29 19 SVO
-62 9.4 2423458 1923-02-07 2423448 1923-01-28 10 SVO
-61 9.0 2423772 1923-12-18 2423752 1923-11-28 20 SVO
-60 9.3 2424069 1924-10-10 2424057 1924-09-28 12 SVO
-59 8.8 2424373 1925-08-10 2424362 1925-07-30 11 SVO
-58 9.5 2424680 1926-06-13 2424666 1926-05-30 14 SVO
-57 8.7 2424986 1927-04-15 2424971 1927-03-31 15 SVO
-56 8.6 2425286 1928-02-09 2425276 1928-01-30 10 SVO
-55 8.9 2425592 1928-12-11 2425580 1928-11-29 12 SVO
-54 8.7 2425897 1929-10-12 2425885 1929-09-30 12 SVO
-53 9.2 2426199 1930-08-10 2426190 1930-08-01 9 SVO
-52 9.2 2426499 1931-06-06 2426494 1931-06-01 5 SVO
-51 9.4 2426796 1932-03-29 2426799 1932-04-01 -3 SVO
-50 9.1 2427122 1933-02-18 2427104 1933-01-31 18 SVO
-49 9.0 2427412 1933-12-05 2427409 1933-12-02 3 SVO
-48 8.9 2427705 1934-09-24 2427713 1934-10-02 -8 SVO
-47 8.9 2428005 1935-07-21 2428018 1935-08-03 -13 SVO
-46 8.9 2428309 1936-05-20 2428323 1936-06-03 -14 SVO
-45 8.8 2428606 1937-03-13 2428627 1937-04-03 -21 SVO
-44 9.5 2428923 1938-01-24 2428932 1938-02-02 -9 SVO
-43 8.7 2429211 1938-11-08 2429237 1938-12-04 -26 SVO
-42 9.3 2429524 1939-09-17 2429541 1939-10-04 -17 SVO
-41 8.6 2429822 1940-07-11 2429846 1940-08-04 -24 AAVSO
-40   2430144 1941-05-29 2430151 1941-06-05 -7 AAVSO
-39   2430417 1942-02-26 2430455 1942-04-05 -38 AAVSO
-38   2430727 1943-01-02 2430760 1943-02-04 -33 AAVSO
-37 8.8 2431039 1943-11-10 2431065 1943-12-06 -26 AAVSO
-36 9.6 2431370 1944-10-06 2431369 1944-10-05 1 SVO
-35 8.6 2431664 1945-07-27 2431674 1945-08-06 -10 SVO
-34   2431963 1946-05-22 2431979 1946-06-07 -16 AAVSO
-33   2432269 1947-03-24 2432284 1947-04-08 -15 AAVSO
-31 8.3 2432879 1948-11-23 2432893 1948-12-07 -14 AAVSO
-30 8.7 2433188 1949-09-28 2433198 1949-10-08 -10 SVO
-29 9.2 2433503 1950-08-09 2433502 1950-08-08 1 SVO
-28 9.0 2433805 1951-06-07 2433807 1951-06-09 -2 AAVSO
-27 9.2 2434100 1952-03-28 2434112 1952-04-09 -12 AAVSO
-26 10.1 2434413 1953-02-04 2434416 1953-02-07 -3 AAVSO
-25 9.0 2434709 1953-11-27 2434721 1953-12-09 -12 AAVSO
-24 9.3 2435012 1954-09-26 2435026 1954-10-10 -14 SVO
-23 9.3 2435325 1955-08-05 2435330 1955-08-10 -5 SVO
-22 8.9 2435627 1956-06-02 2435635 1956-06-10 -8 AAVSO
-21 8.9 2435920 1957-03-22 2435940 1957-04-11 -20 AAVSO
-20 10.0 2436227 1958-01-23 2436244 1958-02-09 -17 AAVSO
-19 8.8 2436523 1958-11-15 2436549 1958-12-11 -26 SVO
-18 9.3 2436824 1959-09-12 2436854 1959-10-12 -30 SVO
-17 9.3 2437126 1960-07-10 2437159 1960-08-12 -33 SVO
-16 9.9 2437426 1961-05-06 2437463 1961-06-12 -37 AAVSO
-15   2437723 1962-02-27 2437768 1962-04-13 -45 AAVSO
-14 10.2 2438039 1963-01-09 2438073 1963-02-12 -34 AAVSO
-13 9.3 2438342 1963-11-08 2438377 1963-12-13 -35 SVO
-12 9.8 2438655 1964-09-16 2438682 1964-10-13 -27 SVO
-11 8.9 2438940 1965-06-28 2438987 1965-08-14 -47 SVO
-10 9.3 2439249 1966-05-03 2439291 1966-06-14 -42 SVO
-9 9.0 2439559 1967-03-09 2439596 1967-04-15 -37 AAVSO
-8 9.1 2439855 1967-12-30 2439901 1968-02-14 -46 SVO
-7 9.3 2440161 1968-10-31 2440205 1968-12-14 -44 SVO
-6 9.2 2440475 1969-09-10 2440510 1969-10-15 -35 SVO
-5 9.2 2440777 1970-07-09 2440815 1970-08-16 -38 SVO
-4 8.7 2441079 1971-05-07 2441119 1971-06-16 -40 SVO
-3 8.9 2441387 1972-03-10 2441424 1972-04-16 -37 AAVSO
-2 9.5 2441687 1973-01-04 2441729 1973-02-15 -42 AAVSO
-1 8.9 2442005 1973-11-18 2442033 1973-12-16 -28 SVO
0 9.5 2442317 1974-09-26 2442338 1974-10-17 -21 SVO
1 8.9 2442618 1975-07-24 2442643 1975-08-18 -25 SVO
2 9.7 2442938 1976-06-08 2442948 1976-06-18 -10 SVO
3 9.2 2443248 1977-04-14 2443252 1977-04-18 -4 AAVSO
4 9.4 2443547 1978-02-07 2443557 1978-02-17 -10 SVO
5 9.1 2443850 1978-12-07 2443862 1978-12-19 -12 AAVSO
6 9.6 2444159 1979-10-12 2444166 1979-10-19 -7 SVO
7 9.0 2444471 1980-08-19 2444471 1980-08-19 0 SVO
8 9.6 2444776 1981-06-20 2444776 1981-06-20 0 SVO
9 9.1 2445073 1982-04-13 2445080 1982-04-20 -7 SVO
10 8.9 2445369 1983-02-03 2445385 1983-02-19 -16 SVO
11 9.5 2445695 1983-12-26 2445690 1983-12-21 5 SVO
12 8.9 2445992 1984-10-18 2445994 1984-10-20 -2 SVO
13 9.9 2446310 1985-09-01 2446299 1985-08-21 11 SVO
14 9.1 2446606 1986-06-24 2446604 1986-06-22 2 SVO
15 9.3 2446908 1987-04-22 2446908 1987-04-22 0 SVO
16 9.3 2447207 1988-02-15 2447213 1988-02-21 -6 SVO
17 9.1 2447511 1988-12-15 2447518 1988-12-22 -7 SVO
18 9.1 2447819 1989-10-19 2447823 1989-10-23 -4 SVO
19 9.5 2448125 1990-08-21 2448127 1990-08-23 -2 SVO
20 8.8 2448420 1991-06-12 2448432 1991-06-24 -12 SVO
21   2448739 1992-04-26 2448737 1992-04-24 2 AAVSO
22 8.8 2449028 1993-02-09 2449041 1993-02-22 -13 SVO
23 9.2 2449344 1993-12-22 2449346 1993-12-24 -2 SVO
24 8.8 2449643 1994-10-17 2449651 1994-10-25 -8 SVO
25 9.2 2449946 1995-08-16 2449955 1995-08-25 -9 SVO
26 9.1 2450257 1996-06-22 2450260 1996-06-25 -3 SVO
27 9.7 2450564 1997-04-25 2450565 1997-04-26 -1 SVO
28 9.0 2450860 1998-02-15 2450869 1998-02-24 -9 SVO
29 9.4 2451174 1998-12-26 2451174 1998-12-26 0 SVO
30 9.0 2451479 1999-10-27 2451479 1999-10-27 0 SVO
31 9.3 2451788 2000-08-31 2451783 2000-08-26 5 SVO
32 9.1 2452090 2001-06-29 2452088 2001-06-27 2 SVO
33 8.7 2452391 2002-04-26 2452393 2002-04-28 -2 SVO
34 9.9 2452704 2003-03-05 2452698 2003-02-27 6 SVO
35 9.2 2453015 2004-01-10 2453002 2003-12-28 13 SVO
36 9.8 2453328 2004-11-18 2453307 2004-10-28 21 SVO
37 8.8 2453631 2005-09-17 2453612 2005-08-29 19 SVO
38 9.6 2453936 2006-07-19 2453916 2006-06-29 20 SVO
39 8.9 2454241 2007-05-20 2454221 2007-04-30 20 SVO
40 9.6 2454547 2008-03-21 2454526 2008-02-29 21 SVO
41 8.8 2454840 2009-01-08 2454830 2008-12-29 10 SVO
42 9.7 2455159 2009-11-23 2455135 2009-10-30 24 SVO
43 9.1 2455468 2010-09-28 2455440 2010-08-31 28 SVO
44 9.2 2455767 2011-07-24 2455744 2011-07-01 23 SVO
45 9.1 2456081 2012-06-02 2456049 2012-05-01 32 SVO
46 9.5 2456399 2013-04-16 2456354 2013-03-02 45 AAVSO
47 9.1 2456695 2014-02-06 2456658 2013-12-31 37 SVO
48 9.6 2456996 2014-12-04 2456963 2014-11-01 33 SVO
49 8.8 2457293 2015-09-27 2457268 2015-09-02 25 SVO
50 9.5 2457608 2016-08-07 2457573 2016-07-03 35 SVO
51 9.3 2457917 2017-06-12 2457877 2017-05-03 40 SVO
52 8.8 2458215 2018-04-06 2458182 2018-03-04 33 SVO
53 9.4 2458518 2019-02-03 2458487 2019-01-03 31 SVO
54 8.7 2458828 2019-12-10 2458791 2019-11-03 37 SVO
55 9.7 2459128 2020-10-05 2459096 2020-09-03 32 SVO
56 8.8 2459439 2021-08-12 2459401 2021-07-05 38 SVO
57 9.4 2459743 2022-06-12 2459705 2022-05-05 38 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.