Maxima for Z Lyr
Period: 291.7, Epoch: 2445266
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-113   2412650 1893-07-05 2412304 1892-07-24 346 SVO
-105   2414980 1899-11-21 2414638 1898-12-14 342 AnHar, 1909, vol 55, p 95
-104   2415265 1900-09-02 2414929 1899-10-01 336 AnHar, 1909, vol 55, p 95
-103   2415567 1901-07-01 2415221 1900-07-20 346 AnHar, 1909, vol 55, p 95
-102   2415847 1902-04-07 2415513 1901-05-08 334 AnHar, 1909, vol 55, p 95
-100   2416429 1903-11-10 2416096 1902-12-12 333 AnHar, 1909, vol 55, p 95
-99   2416736 1904-09-12 2416388 1903-09-30 348 AAVSO
-98   2417016 1905-06-19 2416679 1904-07-17 337 AAVSO
-96 10.0 2417574 1906-12-29 2417263 1906-02-21 311 AAVSO
-95 10.0 2417861 1907-10-12 2417555 1906-12-10 306 AAVSO
-94 9.3 2418150 1908-07-27 2417846 1907-09-27 304 AAVSO
-93 9.5 2418438 1909-05-11 2418138 1908-07-15 300 AAVSO
-92   2418740 1910-03-09 2418430 1909-05-03 310 AAVSO
-91   2419015 1910-12-09 2418721 1910-02-18 294 AAVSO
-90 10.2 2419295 1911-09-15 2419013 1910-12-07 282 SVO
-89 10.6 2419588 1912-07-04 2419305 1911-09-25 283 SVO
-88 10.3 2419857 1913-03-30 2419596 1912-07-12 261 AAVSO
-87 9.6 2420145 1914-01-12 2419888 1913-04-30 257 AAVSO
-85   2420722 1915-08-12 2420472 1914-12-05 250 AAVSO
-84 10.0 2421013 1916-05-29 2420763 1915-09-22 250 AAVSO
-83   2421287 1917-02-27 2421055 1916-07-10 232 AAVSO
-82   2421573 1917-12-10 2421347 1917-04-28 226 AAVSO
-81 11.0 2421862 1918-09-25 2421638 1918-02-13 224 AAVSO
-80 9.5 2422139 1919-06-29 2421930 1918-12-02 209 AAVSO
-79 9.8 2422429 1920-04-14 2422222 1919-09-20 207 AAVSO
-78   2422736 1921-02-15 2422513 1920-07-07 223 AAVSO
-77 10.6 2423012 1921-11-18 2422805 1921-04-25 207 SVO
-76 10.4 2423303 1922-09-05 2423097 1922-02-11 206 SVO
-75 10.1 2423596 1923-06-25 2423389 1922-11-30 207 SVO
-74 10.6 2423890 1924-04-14 2423680 1923-09-17 210 AAVSO
-73 9.9 2424194 1925-02-12 2423972 1924-07-05 222 AAVSO
-72 10.2 2424473 1925-11-18 2424264 1925-04-23 209 SVO
-71 10.1 2424763 1926-09-04 2424555 1926-02-08 208 AAVSO
-70 9.8 2425053 1927-06-21 2424847 1926-11-27 206 SVO
-69 10.3 2425339 1928-04-02 2425139 1927-09-15 200 SVO
-68 10.2 2425636 1929-01-24 2425430 1928-07-02 206 SVO
-67 10.3 2425923 1929-11-07 2425722 1929-04-20 201 SVO
-66 9.9 2426214 1930-08-25 2426014 1930-02-06 200 SVO
-65 10.3 2426511 1931-06-18 2426306 1930-11-25 205 SVO
-64 10.4 2426808 1932-04-10 2426597 1931-09-12 211 SVO
-63 10.2 2427102 1933-01-29 2426889 1932-06-30 213 SVO
-62 10.0 2427396 1933-11-19 2427181 1933-04-18 215 SVO
-61 10.6 2427690 1934-09-09 2427472 1934-02-03 218 SVO
-60 9.8 2427974 1935-06-20 2427764 1934-11-22 210 SVO
-59   2428263 1936-04-04 2428056 1935-09-10 207 AAVSO
-58   2428557 1937-01-23 2428347 1936-06-27 210 AAVSO
-57 10.0 2428844 1937-11-06 2428639 1937-04-15 205 SVO
-56 10.7 2429137 1938-08-26 2428931 1938-02-01 206 SVO
-55 10.2 2429432 1939-06-17 2429223 1938-11-20 209 SVO
-54   2429719 1940-03-30 2429514 1939-09-07 205 AAVSO
-53   2430003 1941-01-08 2429806 1940-06-25 197 AAVSO
-52 10.0 2430279 1941-10-11 2430098 1941-04-13 181 SVO
-51 10.2 2430569 1942-07-28 2430389 1942-01-29 180 SVO
-50 10.2 2430855 1943-05-10 2430681 1942-11-17 174 AAVSO
-49   2431127 1944-02-06 2430973 1943-09-05 154 AAVSO
-48 10.4 2431413 1944-11-18 2431264 1944-06-22 149 AAVSO
-47 10.0 2431702 1945-09-03 2431556 1945-04-10 146 SVO
-46 10.6 2431983 1946-06-11 2431848 1946-01-27 135 AAVSO
-45   2432269 1947-03-24 2432140 1946-11-15 129 AAVSO
-44 10.4 2432553 1948-01-02 2432431 1947-09-02 122 AAVSO
-43 10.3 2432839 1948-10-14 2432723 1948-06-20 116 SVO
-42 10.2 2433124 1949-07-26 2433015 1949-04-08 109 SVO
-41 10.4 2433413 1950-05-11 2433306 1950-01-24 107 AAVSO
-40   2433693 1951-02-15 2433598 1950-11-12 95 AAVSO
-39 10.2 2433972 1951-11-21 2433890 1951-08-31 82 AAVSO
-38 10.7 2434262 1952-09-06 2434181 1952-06-17 81 SVO
-37 10.2 2434545 1953-06-16 2434473 1953-04-05 72 SVO
-36 11.0 2434825 1954-03-23 2434765 1954-01-22 60 AAVSO
-35 10.2 2435114 1955-01-06 2435057 1954-11-10 57 SVO
-34 10.2 2435393 1955-10-12 2435348 1955-08-28 45 SVO
-33 10.0 2435675 1956-07-20 2435640 1956-06-15 35 SVO
-32 10.2 2435960 1957-05-01 2435932 1957-04-03 28 AAVSO
-31 10.2 2436249 1958-02-14 2436223 1958-01-19 26 SVO
-30 10.4 2436518 1958-11-10 2436515 1958-11-07 3 AAVSO
-29 10.0 2436809 1959-08-28 2436807 1959-08-26 2 SVO
-28 10.4 2437100 1960-06-14 2437098 1960-06-12 2 SVO
-27   2437384 1961-03-25 2437390 1961-03-31 -6 AAVSO
-26 10.0 2437671 1962-01-06 2437682 1962-01-17 -11 AAVSO
-25 10.1 2437965 1962-10-27 2437974 1962-11-05 -9 AAVSO
-24 10.5 2438262 1963-08-20 2438265 1963-08-23 -3 SVO
-23 9.9 2438553 1964-06-06 2438557 1964-06-10 -4 SVO
-22 10.6 2438839 1965-03-19 2438849 1965-03-29 -10 AAVSO
-21 10.5 2439127 1966-01-01 2439140 1966-01-14 -13 SVO
-20 10.3 2439424 1966-10-25 2439432 1966-11-02 -8 SVO
-19 10.1 2439714 1967-08-11 2439724 1967-08-21 -10 SVO
-18 9.9 2440008 1968-05-31 2440015 1968-06-07 -7 SVO
-17 10.4 2440299 1969-03-18 2440307 1969-03-26 -8 AAVSO
-16 10.6 2440597 1970-01-10 2440599 1970-01-12 -2 SVO
-15 10.2 2440895 1970-11-04 2440891 1970-10-31 4 SVO
-14 9.7 2441178 1971-08-14 2441182 1971-08-18 -4 SVO
-13 10.5 2441475 1972-06-06 2441474 1972-06-05 1 SVO
-12 9.3 2441753 1973-03-11 2441766 1973-03-24 -13 AAVSO
-11 10.0 2442053 1974-01-05 2442057 1974-01-09 -4 AAVSO
-10 9.9 2442352 1974-10-31 2442349 1974-10-28 3 SVO
-9 10.6 2442644 1975-08-19 2442641 1975-08-16 3 SVO
-8 10.4 2442942 1976-06-12 2442932 1976-06-02 10 SVO
-7 9.8 2443222 1977-03-19 2443224 1977-03-21 -2 AAVSO
-6 11.4 2443514 1978-01-05 2443516 1978-01-07 -2 AAVSO
-5 10.5 2443814 1978-11-01 2443808 1978-10-26 6 AAVSO
-4 9.8 2444107 1979-08-21 2444099 1979-08-13 8 SVO
-3 10.1 2444392 1980-06-01 2444391 1980-05-31 1 SVO
-2 10.1 2444675 1981-03-11 2444683 1981-03-19 -8 AAVSO
-1 10.2 2444977 1982-01-07 2444974 1982-01-04 3 SVO
0 10.1 2445270 1982-10-27 2445266 1982-10-23 4 SVO
1 10.1 2445563 1983-08-16 2445558 1983-08-11 5 SVO
2 10.2 2445860 1984-06-08 2445849 1984-05-28 11 SVO
3 10.0 2446149 1985-03-24 2446141 1985-03-16 8 AAVSO
4 10.7 2446456 1986-01-25 2446433 1986-01-02 23 SVO
5 10.5 2446729 1986-10-25 2446725 1986-10-21 4 SVO
6 10.3 2447009 1987-08-01 2447016 1987-08-08 -7 SVO
7 10.1 2447294 1988-05-12 2447308 1988-05-26 -14 SVO
8 10.7 2447581 1989-02-23 2447600 1989-03-14 -19 SVO
9   2447860 1989-11-29 2447891 1989-12-30 -31 AAVSO
10 10.4 2448151 1990-09-16 2448183 1990-10-18 -32 SVO
11 10.5 2448430 1991-06-22 2448475 1991-08-06 -45 SVO
12   2448718 1992-04-05 2448766 1992-05-23 -48 AAVSO
13 10.4 2449003 1993-01-15 2449058 1993-03-11 -55 SVO
14 9.9 2449270 1993-10-09 2449350 1993-12-28 -80 SVO
15 10.5 2449558 1994-07-24 2449642 1994-10-16 -84 SVO
16 10.1 2449839 1995-05-01 2449933 1995-08-03 -94 SVO
17 10.6 2450131 1996-02-17 2450225 1996-05-21 -94 SVO
18 10.3 2450417 1996-11-29 2450517 1997-03-09 -100 SVO
19 10.6 2450709 1997-09-17 2450808 1997-12-25 -99 SVO
20 10.2 2450995 1998-06-30 2451100 1998-10-13 -105 SVO
21 10.3 2451283 1999-04-14 2451392 1999-08-01 -109 SVO
22 10.6 2451564 2000-01-20 2451683 2000-05-18 -119 SVO
23 10.2 2451842 2000-10-24 2451975 2001-03-06 -133 SVO
24 10.5 2452136 2001-08-14 2452267 2001-12-23 -131 SVO
25 10.3 2452421 2002-05-26 2452559 2002-10-11 -138 SVO
26 10.4 2452708 2003-03-09 2452850 2003-07-29 -142 SVO
27   2453011 2004-01-06 2453142 2004-05-16 -131 AAVSO
28 10.5 2453291 2004-10-12 2453434 2005-03-04 -143 SVO
29 9.9 2453581 2005-07-29 2453725 2005-12-20 -144 SVO
30 10.7 2453877 2006-05-21 2454017 2006-10-08 -140 SVO
31 10.1 2454167 2007-03-07 2454309 2007-07-27 -142 SVO
32 10.4 2454451 2007-12-16 2454600 2008-05-13 -149 SVO
33 10.1 2454736 2008-09-26 2454892 2009-03-01 -156 SVO
34 9.9 2455026 2009-07-13 2455184 2009-12-18 -158 SVO
35 10.4 2455315 2010-04-28 2455476 2010-10-06 -161 SVO
36 10.1 2455605 2011-02-12 2455767 2011-07-24 -162 SVO
37 10.1 2455892 2011-11-26 2456059 2012-05-11 -167 SVO
38 10.4 2456186 2012-09-15 2456351 2013-02-27 -165 SVO
39 9.7 2456473 2013-06-29 2456642 2013-12-15 -169 SVO
40 10.2 2456760 2014-04-12 2456934 2014-10-03 -174 SVO
41 10.1 2457051 2015-01-28 2457226 2015-07-22 -175 SVO
42 10.4 2457344 2015-11-17 2457517 2016-05-08 -173 SVO
43 10.0 2457632 2016-08-31 2457809 2017-02-24 -177 SVO
44 10.6 2457931 2017-06-26 2458101 2017-12-13 -170 SVO
45 9.8 2458220 2018-04-11 2458393 2018-10-01 -173 SVO
46 10.8 2458521 2019-02-06 2458684 2019-07-19 -163 SVO
47 10.1 2458809 2019-11-21 2458976 2020-05-06 -167 SVO
48 10.1 2459104 2020-09-11 2459268 2021-02-22 -164 SVO
49 10.1 2459396 2021-06-30 2459559 2021-12-10 -163 SVO
50 9.8 2459683 2022-04-13 2459851 2022-09-28 -168 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.