Maxima for Z Boo
Period: 280.4, Epoch: 2454557
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-143   2414378 1898-03-29 2414460 1898-06-19 -82 AnHar, 1909, vol 55, p 95
-142   2414650 1898-12-26 2414740 1899-03-26 -90 AnHar, 1952, vol 115
-139   2415515 1901-05-10 2415581 1901-07-15 -66 AnHar, 1909, vol 55, p 95
-138   2415803 1902-02-22 2415862 1902-04-22 -59 AnHar, 1909, vol 55, p 95
-135 9.9 2416659 1904-06-27 2416703 1904-08-10 -44 AAVSO
-134 10.0 2416945 1905-04-09 2416983 1905-05-17 -38 AAVSO
-133 9.3 2417220 1906-01-09 2417264 1906-02-22 -44 AAVSO
-131 8.4 2417788 1907-07-31 2417825 1907-09-06 -37 AAVSO
-130 8.9 2418056 1908-04-24 2418105 1908-06-12 -49 AAVSO
-129   2418347 1909-02-09 2418385 1909-03-19 -38 AAVSO
-127   2418908 1910-08-24 2418946 1910-10-01 -38 AAVSO
-125   2419453 1912-02-20 2419507 1912-04-14 -54 SVO
-122 9.0 2420296 1914-06-12 2420348 1914-08-03 -52 AAVSO
-121   2420577 1915-03-20 2420629 1915-05-11 -52 AAVSO
-120   2420833 1915-12-01 2420909 1916-02-15 -76 AAVSO
-119 9.5 2421136 1916-09-29 2421189 1916-11-21 -53 AAVSO
-118 9.8 2421425 1917-07-15 2421470 1917-08-29 -45 SVO
-117 9.0 2421705 1918-04-21 2421750 1918-06-05 -45 SVO
-116   2421976 1919-01-17 2422031 1919-03-13 -55 AAVSO
-115   2422257 1919-10-25 2422311 1919-12-18 -54 AAVSO
-114 8.8 2422541 1920-08-04 2422591 1920-09-23 -50 AAVSO
-113 9.1 2422825 1921-05-15 2422872 1921-07-01 -47 AAVSO
-112 9.2 2423108 1922-02-22 2423152 1922-04-07 -44 AAVSO
-111   2423388 1922-11-29 2423433 1923-01-13 -45 AAVSO
-110 9.7 2423670 1923-09-07 2423713 1923-10-20 -43 AAVSO
-109 9.5 2423947 1924-06-10 2423993 1924-07-26 -46 SVO
-108 9.2 2424226 1925-03-16 2424274 1925-05-03 -48 AAVSO
-107   2424507 1925-12-22 2424554 1926-02-07 -47 AAVSO
-106   2424779 1926-09-20 2424835 1926-11-15 -56 AAVSO
-105   2425060 1927-06-28 2425115 1927-08-22 -55 AAVSO
-104 9.0 2425342 1928-04-05 2425395 1928-05-28 -53 SVO
-103   2425627 1929-01-15 2425676 1929-03-05 -49 AAVSO
-102 9.3 2425891 1929-10-06 2425956 1929-12-10 -65 SVO
-101 9.6 2426177 1930-07-19 2426237 1930-09-17 -60 AAVSO
-100 9.7 2426454 1931-04-22 2426517 1931-06-24 -63 SVO
-99 8.8 2426725 1932-01-18 2426797 1932-03-30 -72 SVO
-98 10.1 2427007 1932-10-26 2427078 1933-01-05 -71 AAVSO
-97 9.4 2427297 1933-08-12 2427358 1933-10-12 -61 AAVSO
-96 9.5 2427579 1934-05-21 2427639 1934-07-20 -60 SVO
-95 9.3 2427857 1935-02-23 2427919 1935-04-26 -62 AAVSO
-94   2428140 1935-12-03 2428199 1936-01-31 -59 AAVSO
-93   2428416 1936-09-04 2428480 1936-11-07 -64 AAVSO
-92 9.4 2428691 1937-06-06 2428760 1937-08-14 -69 SVO
-91 9.0 2428975 1938-03-17 2429041 1938-05-22 -66 SVO
-90   2429257 1938-12-24 2429321 1939-02-26 -64 AAVSO
-88 9.1 2429827 1940-07-16 2429882 1940-09-09 -55 SVO
-87 9.4 2430111 1941-04-26 2430162 1941-06-16 -51 SVO
-86 9.3 2430389 1942-01-29 2430443 1942-03-24 -54 AAVSO
-84 10.0 2430957 1943-08-20 2431003 1943-10-05 -46 SVO
-83 9.2 2431235 1944-05-24 2431284 1944-07-12 -49 SVO
-82 9.3 2431512 1945-02-25 2431564 1945-04-18 -52 AAVSO
-81   2431798 1945-12-08 2431845 1946-01-24 -47 AAVSO
-80 9.3 2432072 1946-09-08 2432125 1946-10-31 -53 AAVSO
-79 9.0 2432352 1947-06-15 2432405 1947-08-07 -53 SVO
-78 9.3 2432634 1948-03-23 2432686 1948-05-14 -52 AAVSO
-77 9.2 2432911 1948-12-25 2432966 1949-02-18 -55 AAVSO
-76   2433203 1949-10-13 2433247 1949-11-26 -44 AAVSO
-75 9.5 2433480 1950-07-17 2433527 1950-09-02 -47 AAVSO
-74 9.1 2433763 1951-04-26 2433807 1951-06-09 -44 AAVSO
-73 9.5 2434042 1952-01-30 2434088 1952-03-16 -46 AAVSO
-72 9.6 2434335 1952-11-18 2434368 1952-12-21 -33 AAVSO
-71 10.2 2434623 1953-09-02 2434649 1953-09-28 -26 AAVSO
-70 9.4 2434905 1954-06-11 2434929 1954-07-05 -24 SVO
-69 8.9 2435184 1955-03-17 2435209 1955-04-11 -25 SVO
-68   2435466 1955-12-24 2435490 1956-01-17 -24 AAVSO
-67   2435747 1956-09-30 2435770 1956-10-23 -23 AAVSO
-66 10.0 2436042 1957-07-22 2436051 1957-07-31 -9 AAVSO
-65 9.3 2436312 1958-04-18 2436331 1958-05-07 -19 SVO
-64 9.8 2436591 1959-01-22 2436611 1959-02-11 -20 AAVSO
-63 9.2 2436888 1959-11-15 2436892 1959-11-19 -4 AAVSO
-62 9.1 2437151 1960-08-04 2437172 1960-08-25 -21 SVO
-61 9.5 2437440 1961-05-20 2437453 1961-06-02 -13 SVO
-60 9.6 2437728 1962-03-04 2437733 1962-03-09 -5 AAVSO
-59 10.2 2438003 1962-12-04 2438013 1962-12-14 -10 AAVSO
-58 9.5 2438281 1963-09-08 2438294 1963-09-21 -13 AAVSO
-57 9.3 2438566 1964-06-19 2438574 1964-06-27 -8 SVO
-56 8.7 2438842 1965-03-22 2438855 1965-04-04 -13 SVO
-55 10.6 2439133 1966-01-07 2439135 1966-01-09 -2 AAVSO
-54   2439410 1966-10-11 2439415 1966-10-16 -5 AAVSO
-53 9.5 2439697 1967-07-25 2439696 1967-07-24 1 SVO
-52 9.4 2439980 1968-05-03 2439976 1968-04-29 4 SVO
-51 9.0 2440250 1969-01-28 2440257 1969-02-04 -7 AAVSO
-50 9.4 2440530 1969-11-04 2440537 1969-11-11 -7 AAVSO
-49 10.1 2440820 1970-08-21 2440817 1970-08-18 3 SVO
-48 9.3 2441096 1971-05-24 2441098 1971-05-26 -2 SVO
-47 9.2 2441388 1972-03-11 2441378 1972-03-01 10 SVO
-46 10.5 2441670 1972-12-18 2441659 1972-12-07 11 AAVSO
-45 9.5 2441948 1973-09-22 2441939 1973-09-13 9 AAVSO
-44 8.9 2442219 1974-06-20 2442219 1974-06-20 0 SVO
-43 9.1 2442501 1975-03-29 2442500 1975-03-28 1 SVO
-42 8.6 2442781 1976-01-03 2442780 1976-01-02 1 AAVSO
-41 8.9 2443056 1976-10-04 2443061 1976-10-09 -5 SVO
-40 9.3 2443344 1977-07-19 2443341 1977-07-16 3 SVO
-39 9.6 2443629 1978-04-30 2443621 1978-04-22 8 SVO
-38 9.3 2443905 1979-01-31 2443902 1979-01-28 3 AAVSO
-37 9.4 2444185 1979-11-07 2444182 1979-11-04 3 AAVSO
-36 9.5 2444465 1980-08-13 2444463 1980-08-11 2 AAVSO
-35 8.7 2444738 1981-05-13 2444743 1981-05-18 -5 SVO
-34 9.7 2445028 1982-02-27 2445023 1982-02-22 5 SVO
-33 10.0 2445306 1982-12-02 2445304 1982-11-30 2 AAVSO
-32 8.8 2445583 1983-09-05 2445584 1983-09-06 -1 AAVSO
-31 10.0 2445867 1984-06-15 2445865 1984-06-13 2 SVO
-30 10.0 2446151 1985-03-26 2446145 1985-03-20 6 SVO
-29 9.3 2446428 1985-12-28 2446425 1985-12-25 3 AAVSO
-28 9.6 2446715 1986-10-11 2446706 1986-10-02 9 SVO
-27 9.3 2446995 1987-07-18 2446986 1987-07-09 9 SVO
-26 9.4 2447276 1988-04-24 2447267 1988-04-15 9 SVO
-25 9.0 2447552 1989-01-25 2447547 1989-01-20 5 SVO
-24 9.7 2447830 1989-10-30 2447827 1989-10-27 3 SVO
-23 9.1 2448104 1990-07-31 2448108 1990-08-04 -4 SVO
-22 9.6 2448385 1991-05-08 2448388 1991-05-11 -3 SVO
-21 9.2 2448669 1992-02-16 2448669 1992-02-16 0 SVO
-20   2448947 1992-11-20 2448949 1992-11-22 -2 AAVSO
-19 9.3 2449224 1993-08-24 2449229 1993-08-29 -5 SVO
-18 9.4 2449509 1994-06-05 2449510 1994-06-06 -1 SVO
-17 10.0 2449787 1995-03-10 2449790 1995-03-13 -3 SVO
-16   2450067 1995-12-15 2450071 1995-12-19 -4 AAVSO
-15 9.6 2450342 1996-09-15 2450351 1996-09-24 -9 SVO
-14 9.4 2450620 1997-06-20 2450631 1997-07-01 -11 SVO
-13 9.2 2450900 1998-03-27 2450912 1998-04-08 -12 SVO
-12 9.5 2451184 1999-01-05 2451192 1999-01-13 -8 SVO
-11   2451463 1999-10-11 2451473 1999-10-21 -10 AAVSO
-10 9.2 2451747 2000-07-21 2451753 2000-07-27 -6 SVO
-9 9.4 2452022 2001-04-22 2452033 2001-05-03 -11 SVO
-8 9.7 2452308 2002-02-02 2452314 2002-02-08 -6 SVO
-7 9.0 2452585 2002-11-06 2452594 2002-11-15 -9 SVO
-6 9.5 2452866 2003-08-14 2452875 2003-08-23 -9 SVO
-5 9.5 2453151 2004-05-25 2453155 2004-05-29 -4 SVO
-4 8.6 2453428 2005-02-26 2453435 2005-03-05 -7 SVO
-3   2453721 2005-12-16 2453716 2005-12-11 5 AAVSO
-2 9.3 2454000 2006-09-21 2453996 2006-09-17 4 SVO
-1 9.4 2454276 2007-06-24 2454277 2007-06-25 -1 SVO
0 9.1 2454558 2008-04-01 2454557 2008-03-31 1 SVO
1 9.4 2454840 2009-01-08 2454837 2009-01-05 3 AAVSO
2   2455121 2009-10-16 2455118 2009-10-13 3 AAVSO
3 9.6 2455394 2010-07-16 2455398 2010-07-20 -4 SVO
4 9.0 2455671 2011-04-19 2455679 2011-04-27 -8 SVO
5 9.1 2455953 2012-01-26 2455959 2012-02-01 -6 SVO
6   2456239 2012-11-07 2456239 2012-11-07 0 AAVSO
7 9.1 2456515 2013-08-10 2456520 2013-08-15 -5 AAVSO
8 8.8 2456797 2014-05-19 2456800 2014-05-22 -3 SVO
9 9.4 2457083 2015-03-01 2457081 2015-02-27 2 SVO
10 9.5 2457367 2015-12-10 2457361 2015-12-04 6 AAVSO
11 9.0 2457656 2016-09-24 2457641 2016-09-09 15 SVO
12 9.3 2457936 2017-07-01 2457922 2017-06-17 14 SVO
13 9.4 2458229 2018-04-20 2458202 2018-03-24 27 SVO
14 8.6 2458504 2019-01-20 2458483 2018-12-30 21 SVO
15 9.1 2458794 2019-11-06 2458763 2019-10-06 31 SVO
16 9.3 2459069 2020-08-07 2459043 2020-07-12 26 SVO
17 9.0 2459365 2021-05-30 2459324 2021-04-19 41 SVO
18 10.0 2459644 2022-03-05 2459604 2022-01-24 40 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.