Maxima for Z Del
Period: 304.48, Epoch: 2442317
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-144   2398539 1854-11-16 2398472 1854-09-10 67 AnHar, 1937, vol 105, p 459
-143   2398837 1855-09-10 2398776 1855-07-11 61 GuL, 1920, 1.2
-96   2413100 1894-09-28 2413087 1894-09-15 13 SVO
-95   2413405 1895-07-30 2413391 1895-07-16 14 SVO
-94   2413701 1896-05-21 2413696 1896-05-16 5 AnHar, 1909, vol 55, p 95
-93   2414005 1897-03-21 2414000 1897-03-16 5 SVO
-90   2414930 1899-10-02 2414914 1899-09-16 16 SVO
-89   2415230 1900-07-29 2415218 1900-07-17 12 AnHar, 1909, vol 55, p 95
-86   2416138 1903-01-23 2416132 1903-01-17 6 AnHar, 1909, vol 55, p 95
-85   2416438 1903-11-19 2416436 1903-11-17 2 AnHar, 1909, vol 55, p 95
-84   2416743 1904-09-19 2416741 1904-09-17 2 AAVSO
-83 9.0 2417054 1905-07-27 2417045 1905-07-18 9 AAVSO
-82 8.6 2417347 1906-05-16 2417350 1906-05-19 -3 AAVSO
-81   2417659 1907-03-24 2417654 1907-03-19 5 AAVSO
-80   2417968 1908-01-27 2417959 1908-01-18 9 AAVSO
-79   2418270 1908-11-24 2418263 1908-11-17 7 SVO
-78 8.2 2418574 1909-09-24 2418568 1909-09-18 6 AAVSO
-77   2418880 1910-07-27 2418872 1910-07-19 8 AAVSO
-76   2419188 1911-05-31 2419177 1911-05-20 11 AAVSO
-73   2420126 1913-12-24 2420090 1913-11-18 36 AAVSO
-72 8.6 2420425 1914-10-19 2420394 1914-09-18 31 AAVSO
-71 9.0 2420725 1915-08-15 2420699 1915-07-20 26 AAVSO
-70 8.9 2421035 1916-06-20 2421003 1916-05-19 32 SVO
-69 9.1 2421335 1917-04-16 2421308 1917-03-20 27 AAVSO
-68 9.5 2421647 1918-02-22 2421612 1918-01-18 35 AAVSO
-67   2421961 1919-01-02 2421917 1918-11-19 44 AAVSO
-66 9.4 2422251 1919-10-19 2422221 1919-09-19 30 AAVSO
-65 9.0 2422562 1920-08-25 2422526 1920-07-20 36 SVO
-64 9.5 2422850 1921-06-09 2422830 1921-05-20 20 AAVSO
-63 8.9 2423162 1922-04-17 2423135 1922-03-21 27 SVO
-62 9.4 2423458 1923-02-07 2423439 1923-01-19 19 SVO
-61 9.0 2423772 1923-12-18 2423744 1923-11-20 28 SVO
-60 9.3 2424069 1924-10-10 2424048 1924-09-19 21 SVO
-59 8.8 2424373 1925-08-10 2424353 1925-07-21 20 SVO
-58 9.5 2424680 1926-06-13 2424657 1926-05-21 23 SVO
-57 8.7 2424986 1927-04-15 2424962 1927-03-22 24 SVO
-56 8.6 2425286 1928-02-09 2425266 1928-01-20 20 SVO
-55 8.9 2425592 1928-12-11 2425571 1928-11-20 21 SVO
-54 8.7 2425897 1929-10-12 2425875 1929-09-20 22 SVO
-53 9.2 2426199 1930-08-10 2426180 1930-07-22 19 SVO
-52 9.2 2426499 1931-06-06 2426484 1931-05-22 15 SVO
-51 9.4 2426796 1932-03-29 2426789 1932-03-22 7 SVO
-50 9.1 2427122 1933-02-18 2427093 1933-01-20 29 SVO
-49 9.0 2427412 1933-12-05 2427397 1933-11-20 15 SVO
-48 8.9 2427705 1934-09-24 2427702 1934-09-21 3 SVO
-47 8.9 2428005 1935-07-21 2428006 1935-07-22 -1 SVO
-46 8.9 2428309 1936-05-20 2428311 1936-05-22 -2 SVO
-45 8.8 2428606 1937-03-13 2428615 1937-03-22 -9 SVO
-44 9.5 2428923 1938-01-24 2428920 1938-01-21 3 SVO
-43 8.7 2429211 1938-11-08 2429224 1938-11-21 -13 SVO
-42 9.3 2429524 1939-09-17 2429529 1939-09-22 -5 SVO
-41 8.6 2429822 1940-07-11 2429833 1940-07-22 -11 AAVSO
-40   2430134 1941-05-19 2430138 1941-05-23 -4 SVO
-39   2430430 1942-03-11 2430442 1942-03-23 -12 SVO
-38   2430727 1943-01-02 2430747 1943-01-22 -20 AAVSO
-37 8.8 2431039 1943-11-10 2431051 1943-11-22 -12 AAVSO
-36 9.6 2431370 1944-10-06 2431356 1944-09-22 14 SVO
-35 8.6 2431664 1945-07-27 2431660 1945-07-23 4 SVO
-34   2431963 1946-05-22 2431965 1946-05-24 -2 AAVSO
-33   2432269 1947-03-24 2432269 1947-03-24 0 AAVSO
-31 8.3 2432879 1948-11-23 2432878 1948-11-22 1 AAVSO
-30 8.7 2433188 1949-09-28 2433183 1949-09-23 5 SVO
-29 9.2 2433503 1950-08-09 2433487 1950-07-24 16 SVO
-28 9.0 2433805 1951-06-07 2433792 1951-05-25 13 AAVSO
-27 9.2 2434100 1952-03-28 2434096 1952-03-24 4 AAVSO
-26 10.1 2434413 1953-02-04 2434401 1953-01-23 12 AAVSO
-25 9.0 2434709 1953-11-27 2434705 1953-11-23 4 AAVSO
-24 9.3 2435012 1954-09-26 2435009 1954-09-23 3 SVO
-23 9.3 2435325 1955-08-05 2435314 1955-07-25 11 SVO
-22 8.9 2435627 1956-06-02 2435618 1956-05-24 9 AAVSO
-21 8.9 2435920 1957-03-22 2435923 1957-03-25 -3 AAVSO
-20 10.0 2436227 1958-01-23 2436227 1958-01-23 0 AAVSO
-19 8.8 2436523 1958-11-15 2436532 1958-11-24 -9 SVO
-18 9.3 2436824 1959-09-12 2436836 1959-09-24 -12 SVO
-17 9.3 2437126 1960-07-10 2437141 1960-07-25 -15 SVO
-16 9.9 2437426 1961-05-06 2437445 1961-05-25 -19 AAVSO
-15   2437723 1962-02-27 2437750 1962-03-26 -27 AAVSO
-14 10.2 2438039 1963-01-09 2438054 1963-01-24 -15 AAVSO
-13 9.3 2438342 1963-11-08 2438359 1963-11-25 -17 SVO
-12 9.8 2438655 1964-09-16 2438663 1964-09-24 -8 SVO
-11 8.9 2438940 1965-06-28 2438968 1965-07-26 -28 SVO
-10 9.3 2439249 1966-05-03 2439272 1966-05-26 -23 SVO
-9 9.0 2439559 1967-03-09 2439577 1967-03-27 -18 AAVSO
-8 9.1 2439855 1967-12-30 2439881 1968-01-25 -26 SVO
-7 9.3 2440161 1968-10-31 2440186 1968-11-25 -25 SVO
-6 9.2 2440475 1969-09-10 2440490 1969-09-25 -15 SVO
-5 9.2 2440777 1970-07-09 2440795 1970-07-27 -18 SVO
-4 8.7 2441079 1971-05-07 2441099 1971-05-27 -20 SVO
-3 8.9 2441387 1972-03-10 2441404 1972-03-27 -17 AAVSO
-2 9.5 2441687 1973-01-04 2441708 1973-01-25 -21 AAVSO
-1 8.9 2442005 1973-11-18 2442013 1973-11-26 -8 SVO
0 9.5 2442317 1974-09-26 2442317 1974-09-26 0 SVO
1 8.9 2442618 1975-07-24 2442621 1975-07-27 -3 SVO
2 9.7 2442938 1976-06-08 2442926 1976-05-27 12 SVO
3 9.2 2443248 1977-04-14 2443230 1977-03-27 18 AAVSO
4 9.4 2443547 1978-02-07 2443535 1978-01-26 12 SVO
5 9.1 2443850 1978-12-07 2443839 1978-11-26 11 AAVSO
6 9.6 2444159 1979-10-12 2444144 1979-09-27 15 SVO
7 9.0 2444471 1980-08-19 2444448 1980-07-27 23 SVO
8 9.6 2444776 1981-06-20 2444753 1981-05-28 23 SVO
9 9.1 2445073 1982-04-13 2445057 1982-03-28 16 SVO
10 8.9 2445369 1983-02-03 2445362 1983-01-27 7 SVO
11 9.5 2445695 1983-12-26 2445666 1983-11-27 29 SVO
12 8.9 2445992 1984-10-18 2445971 1984-09-27 21 SVO
13 9.9 2446310 1985-09-01 2446275 1985-07-28 35 SVO
14 9.1 2446606 1986-06-24 2446580 1986-05-29 26 SVO
15 9.3 2446908 1987-04-22 2446884 1987-03-29 24 SVO
16 9.3 2447207 1988-02-15 2447189 1988-01-28 18 SVO
17 9.1 2447511 1988-12-15 2447493 1988-11-27 18 SVO
18 9.1 2447819 1989-10-19 2447798 1989-09-28 21 SVO
19 9.5 2448125 1990-08-21 2448102 1990-07-29 23 SVO
20 8.8 2448420 1991-06-12 2448407 1991-05-30 13 SVO
21   2448739 1992-04-26 2448711 1992-03-29 28 AAVSO
22 8.8 2449028 1993-02-09 2449016 1993-01-28 12 SVO
23 9.2 2449344 1993-12-22 2449320 1993-11-28 24 SVO
24 8.8 2449643 1994-10-17 2449625 1994-09-29 18 SVO
25 9.2 2449946 1995-08-16 2449929 1995-07-30 17 SVO
26 9.1 2450257 1996-06-22 2450233 1996-05-29 24 SVO
27 9.7 2450564 1997-04-25 2450538 1997-03-30 26 SVO
28 9.0 2450860 1998-02-15 2450842 1998-01-28 18 SVO
29 9.4 2451174 1998-12-26 2451147 1998-11-29 27 SVO
30 9.0 2451479 1999-10-27 2451451 1999-09-29 28 SVO
31 9.3 2451788 2000-08-31 2451756 2000-07-30 32 SVO
32 9.1 2452090 2001-06-29 2452060 2001-05-30 30 SVO
33 8.7 2452391 2002-04-26 2452365 2002-03-31 26 SVO
34 9.9 2452704 2003-03-05 2452669 2003-01-29 35 SVO
35 9.2 2453015 2004-01-10 2452974 2003-11-30 41 SVO
36 9.8 2453328 2004-11-18 2453278 2004-09-29 50 SVO
37 8.8 2453631 2005-09-17 2453583 2005-07-31 48 SVO
38 9.6 2453936 2006-07-19 2453887 2006-05-31 49 SVO
39 8.9 2454241 2007-05-20 2454192 2007-04-01 49 SVO
40 9.6 2454547 2008-03-21 2454496 2008-01-30 51 SVO
41 8.8 2454840 2009-01-08 2454801 2008-11-30 39 SVO
42 9.7 2455159 2009-11-23 2455105 2009-09-30 54 SVO
43 9.1 2455468 2010-09-28 2455410 2010-08-01 58 SVO
44 9.2 2455767 2011-07-24 2455714 2011-06-01 53 SVO
45 9.1 2456081 2012-06-02 2456019 2012-04-01 62 SVO
46 9.4 2456392 2013-04-09 2456323 2013-01-30 69 SVO
47 9.1 2456695 2014-02-06 2456628 2013-12-01 67 SVO
48 9.6 2456996 2014-12-04 2456932 2014-10-01 64 SVO
49 8.8 2457293 2015-09-27 2457237 2015-08-02 56 SVO
50 9.5 2457608 2016-08-07 2457541 2016-06-01 67 SVO
51 9.3 2457917 2017-06-12 2457845 2017-04-01 72 SVO
52 8.8 2458215 2018-04-06 2458150 2018-01-31 65 SVO
53 9.4 2458518 2019-02-03 2458454 2018-12-01 64 SVO
54 8.7 2458828 2019-12-10 2458759 2019-10-02 69 SVO
55 9.7 2459128 2020-10-05 2459063 2020-08-01 65 SVO
56 8.8 2459439 2021-08-12 2459368 2021-06-02 71 SVO
57 9.4 2459743 2022-06-12 2459672 2022-04-02 71 SVO
58 8.6 2460043 2023-04-08 2459977 2023-02-01 66 SVO
59 10.2 2460358 2024-02-17 2460281 2023-12-02 77 SVO
60 9.5 2460670 2024-12-25 2460586 2024-10-02 84 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.