Maxima for Z Del
Period: 304.71, Epoch: 2442339.5
AAVSO offset: -2

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-144   2398539 1854-11-16 2398462 1854-08-31 77 AnHar, 1937, vol 105, p 459
-143   2398837 1855-09-10 2398766 1855-07-01 71 GuL, 1920, 1.2
-96   2413100 1894-09-28 2413088 1894-09-16 12 SVO
-95   2413405 1895-07-30 2413392 1895-07-17 13 SVO
-94   2413701 1896-05-21 2413697 1896-05-17 4 AnHar, 1909, vol 55, p 95
-93   2414005 1897-03-21 2414002 1897-03-18 3 SVO
-90   2414930 1899-10-02 2414916 1899-09-18 14 SVO
-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 2416439 1903-11-20 -1 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 2417353 1906-05-22 -6 AAVSO
-81   2417659 1907-03-24 2417658 1907-03-23 1 AAVSO
-80   2417968 1908-01-27 2417963 1908-01-22 5 AAVSO
-79   2418270 1908-11-24 2418268 1908-11-22 2 SVO
-78 8.2 2418574 1909-09-24 2418572 1909-09-22 2 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 2425581 1928-11-30 11 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 2426495 1931-06-02 4 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 2427714 1934-10-03 -9 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 2428628 1937-04-04 -22 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 2429542 1939-10-05 -18 SVO
-41 8.6 2429822 1940-07-11 2429846 1940-08-04 -24 AAVSO
-40   2430134 1941-05-19 2430151 1941-06-05 -17 SVO
-39   2430430 1942-03-11 2430456 1942-04-06 -26 SVO
-38   2430727 1943-01-02 2430761 1943-02-05 -34 AAVSO
-37 8.8 2431039 1943-11-10 2431065 1943-12-06 -26 AAVSO
-36 9.6 2431370 1944-10-06 2431370 1944-10-06 0 SVO
-35 8.6 2431664 1945-07-27 2431675 1945-08-07 -11 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 2432894 1948-12-08 -15 AAVSO
-30 8.7 2433188 1949-09-28 2433198 1949-10-08 -10 SVO
-29 9.2 2433503 1950-08-09 2433503 1950-08-09 0 SVO
-28 9.0 2433805 1951-06-07 2433808 1951-06-10 -3 AAVSO
-27 9.2 2434100 1952-03-28 2434112 1952-04-09 -12 AAVSO
-26 10.1 2434413 1953-02-04 2434417 1953-02-08 -4 AAVSO
-25 9.0 2434709 1953-11-27 2434722 1953-12-10 -13 AAVSO
-24 9.3 2435012 1954-09-26 2435027 1954-10-11 -15 SVO
-23 9.3 2435325 1955-08-05 2435331 1955-08-11 -6 SVO
-22 8.9 2435627 1956-06-02 2435636 1956-06-11 -9 AAVSO
-21 8.9 2435920 1957-03-22 2435941 1957-04-12 -21 AAVSO
-20 10.0 2436227 1958-01-23 2436245 1958-02-10 -18 AAVSO
-19 8.8 2436523 1958-11-15 2436550 1958-12-12 -27 SVO
-18 9.3 2436824 1959-09-12 2436855 1959-10-13 -31 SVO
-17 9.3 2437126 1960-07-10 2437159 1960-08-12 -33 SVO
-16 9.9 2437426 1961-05-06 2437464 1961-06-13 -38 AAVSO
-15   2437723 1962-02-27 2437769 1962-04-14 -46 AAVSO
-14 10.2 2438039 1963-01-09 2438074 1963-02-13 -35 AAVSO
-13 9.3 2438342 1963-11-08 2438378 1963-12-14 -36 SVO
-12 9.8 2438655 1964-09-16 2438683 1964-10-14 -28 SVO
-11 8.9 2438940 1965-06-28 2438988 1965-08-15 -48 SVO
-10 9.3 2439249 1966-05-03 2439292 1966-06-15 -43 SVO
-9 9.0 2439559 1967-03-09 2439597 1967-04-16 -38 AAVSO
-8 9.1 2439855 1967-12-30 2439902 1968-02-15 -47 SVO
-7 9.3 2440161 1968-10-31 2440207 1968-12-16 -46 SVO
-6 9.2 2440475 1969-09-10 2440511 1969-10-16 -36 SVO
-5 9.2 2440777 1970-07-09 2440816 1970-08-17 -39 SVO
-4 8.7 2441079 1971-05-07 2441121 1971-06-18 -42 SVO
-3 8.9 2441387 1972-03-10 2441425 1972-04-17 -38 AAVSO
-2 9.5 2441687 1973-01-04 2441730 1973-02-16 -43 AAVSO
-1 8.9 2442005 1973-11-18 2442035 1973-12-18 -30 SVO
0 9.5 2442317 1974-09-26 2442340 1974-10-19 -23 SVO
1 8.9 2442618 1975-07-24 2442644 1975-08-19 -26 SVO
2 9.7 2442938 1976-06-08 2442949 1976-06-19 -11 SVO
3 9.2 2443248 1977-04-14 2443254 1977-04-20 -6 AAVSO
4 9.4 2443547 1978-02-07 2443558 1978-02-18 -11 SVO
5 9.1 2443850 1978-12-07 2443863 1978-12-20 -13 AAVSO
6 9.6 2444159 1979-10-12 2444168 1979-10-21 -9 SVO
7 9.0 2444471 1980-08-19 2444472 1980-08-20 -1 SVO
8 9.6 2444776 1981-06-20 2444777 1981-06-21 -1 SVO
9 9.1 2445073 1982-04-13 2445082 1982-04-22 -9 SVO
10 8.9 2445369 1983-02-03 2445387 1983-02-21 -18 SVO
11 9.5 2445695 1983-12-26 2445691 1983-12-22 4 SVO
12 8.9 2445992 1984-10-18 2445996 1984-10-22 -4 SVO
13 9.9 2446310 1985-09-01 2446301 1985-08-23 9 SVO
14 9.1 2446606 1986-06-24 2446605 1986-06-23 1 SVO
15 9.3 2446908 1987-04-22 2446910 1987-04-24 -2 SVO
16 9.3 2447207 1988-02-15 2447215 1988-02-23 -8 SVO
17 9.1 2447511 1988-12-15 2447520 1988-12-24 -9 SVO
18 9.1 2447819 1989-10-19 2447824 1989-10-24 -5 SVO
19 9.5 2448125 1990-08-21 2448129 1990-08-25 -4 SVO
20 8.8 2448420 1991-06-12 2448434 1991-06-26 -14 SVO
21   2448739 1992-04-26 2448738 1992-04-25 1 AAVSO
22 8.8 2449028 1993-02-09 2449043 1993-02-24 -15 SVO
23 9.2 2449344 1993-12-22 2449348 1993-12-26 -4 SVO
24 8.8 2449643 1994-10-17 2449653 1994-10-27 -10 SVO
25 9.2 2449946 1995-08-16 2449957 1995-08-27 -11 SVO
26 9.1 2450257 1996-06-22 2450262 1996-06-27 -5 SVO
27 9.7 2450564 1997-04-25 2450567 1997-04-28 -3 SVO
28 9.0 2450860 1998-02-15 2450871 1998-02-26 -11 SVO
29 9.4 2451174 1998-12-26 2451176 1998-12-28 -2 SVO
30 9.0 2451479 1999-10-27 2451481 1999-10-29 -2 SVO
31 9.3 2451788 2000-08-31 2451785 2000-08-28 3 SVO
32 9.1 2452090 2001-06-29 2452090 2001-06-29 0 SVO
33 8.7 2452391 2002-04-26 2452395 2002-04-30 -4 SVO
34 9.9 2452704 2003-03-05 2452700 2003-03-01 4 SVO
35 9.2 2453015 2004-01-10 2453004 2003-12-30 11 SVO
36 9.8 2453328 2004-11-18 2453309 2004-10-30 19 SVO
37 8.8 2453631 2005-09-17 2453614 2005-08-31 17 SVO
38 9.6 2453936 2006-07-19 2453918 2006-07-01 18 SVO
39 8.9 2454241 2007-05-20 2454223 2007-05-02 18 SVO
40 9.6 2454547 2008-03-21 2454528 2008-03-02 19 SVO
41 8.8 2454840 2009-01-08 2454833 2009-01-01 7 SVO
42 9.7 2455159 2009-11-23 2455137 2009-11-01 22 SVO
43 9.1 2455468 2010-09-28 2455442 2010-09-02 26 SVO
44 9.2 2455767 2011-07-24 2455747 2011-07-04 20 SVO
45 9.1 2456081 2012-06-02 2456051 2012-05-03 30 SVO
46 9.4 2456392 2013-04-09 2456356 2013-03-04 36 SVO
47 9.1 2456695 2014-02-06 2456661 2014-01-03 34 SVO
48 9.6 2456996 2014-12-04 2456965 2014-11-03 31 SVO
49 8.8 2457293 2015-09-27 2457270 2015-09-04 23 SVO
50 9.5 2457608 2016-08-07 2457575 2016-07-05 33 SVO
51 9.3 2457917 2017-06-12 2457880 2017-05-06 37 SVO
52 8.8 2458215 2018-04-06 2458184 2018-03-06 31 SVO
53 9.4 2458518 2019-02-03 2458489 2019-01-05 29 SVO
54 8.7 2458828 2019-12-10 2458794 2019-11-06 34 SVO
55 9.7 2459128 2020-10-05 2459098 2020-09-05 30 SVO
56 8.8 2459439 2021-08-12 2459403 2021-07-07 36 SVO
57 9.4 2459743 2022-06-12 2459708 2022-05-08 35 SVO
58 8.6 2460043 2023-04-08 2460013 2023-03-09 30 SVO
59 10.2 2460358 2024-02-17 2460317 2024-01-07 41 SVO
60 9.5 2460670 2024-12-25 2460622 2024-11-07 48 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.