Maxima for Y Dra
Period: 325.79, Epoch: 2444448
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-123   2404366 1870-10-30 2404376 1870-11-09 -10 GuL, 1918, 1.1
-91   2414800 1899-05-25 2414801 1899-05-26 -1 SVO
-90   2415120 1900-04-10 2415127 1900-04-17 -7 AnHar, 1952, vol 118
-89   2415460 1901-03-16 2415453 1901-03-09 7 AnHar, 1952, vol 118
-88   2415799 1902-02-18 2415778 1902-01-28 21 SVO
-87   2416131 1903-01-16 2416104 1902-12-20 27 SVO
-86   2416464 1903-12-15 2416430 1903-11-11 34 SVO
-85   2416786 1904-11-01 2416756 1904-10-02 30 SVO
-84 8.5 2417116 1905-09-27 2417082 1905-08-24 34 AAVSO
-83   2417451 1906-08-28 2417407 1906-07-15 44 AAVSO
-82 8.4 2417786 1907-07-29 2417733 1907-06-06 53 AAVSO
-81 8.5 2418103 1908-06-10 2418059 1908-04-27 44 AAVSO
-80 8.5 2418417 1909-04-20 2418385 1909-03-19 32 AAVSO
-79   2418763 1910-04-01 2418711 1910-02-08 52 AAVSO
-78   2419073 1911-02-05 2419036 1910-12-30 37 SVO
-77 9.1 2419408 1912-01-06 2419362 1911-11-21 46 SVO
-76 8.7 2419725 1912-11-18 2419688 1912-10-12 37 SVO
-75 10.7 2420051 1913-10-10 2420014 1913-09-03 37 AAVSO
-74 8.5 2420361 1914-08-16 2420340 1914-07-26 21 AAVSO
-73 9.6 2420699 1915-07-20 2420665 1915-06-16 34 AAVSO
-72 8.5 2421021 1916-06-06 2420991 1916-05-07 30 AAVSO
-71 9.5 2421335 1917-04-16 2421317 1917-03-29 18 AAVSO
-70 9.4 2421663 1918-03-10 2421643 1918-02-18 20 AAVSO
-69   2421987 1919-01-28 2421968 1919-01-09 19 SVO
-68 9.9 2422319 1919-12-26 2422294 1919-12-01 25 SVO
-67 8.8 2422637 1920-11-08 2422620 1920-10-22 17 SVO
-66 9.1 2422975 1921-10-12 2422946 1921-09-13 29 SVO
-65 8.5 2423291 1922-08-24 2423272 1922-08-05 19 SVO
-64 9.3 2423628 1923-07-27 2423597 1923-06-26 31 SVO
-63 9.1 2423955 1924-06-18 2423923 1924-05-17 32 SVO
-62 8.7 2424288 1925-05-17 2424249 1925-04-08 39 SVO
-61 9.6 2424613 1926-04-07 2424575 1926-02-28 38 SVO
-60 8.6 2424943 1927-03-03 2424901 1927-01-20 42 SVO
-59 8.8 2425263 1928-01-17 2425226 1927-12-11 37 SVO
-58 8.2 2425591 1928-12-10 2425552 1928-11-01 39 SVO
-57 9.5 2425924 1929-11-08 2425878 1929-09-23 46 SVO
-56 9.1 2426253 1930-10-03 2426204 1930-08-15 49 SVO
-55 9.3 2426578 1931-08-24 2426530 1931-07-07 48 SVO
-54 8.3 2426904 1932-07-15 2426855 1932-05-27 49 SVO
-53 9.5 2427225 1933-06-01 2427181 1933-04-18 44 SVO
-52 9.2 2427558 1934-04-30 2427507 1934-03-10 51 SVO
-51 9.1 2427883 1935-03-21 2427833 1935-01-30 50 SVO
-50 8.9 2428199 1936-01-31 2428159 1935-12-22 40 SVO
-49 8.6 2428534 1936-12-31 2428484 1936-11-11 50 SVO
-48 9.1 2428860 1937-11-22 2428810 1937-10-03 50 SVO
-47 8.8 2429191 1938-10-19 2429136 1938-08-25 55 SVO
-46 8.9 2429526 1939-09-19 2429462 1939-07-17 64 SVO
-45 8.2 2429844 1940-08-02 2429787 1940-06-06 57 SVO
-44 9.2 2430187 1941-07-11 2430113 1941-04-28 74 SVO
-43 9.4 2430502 1942-05-22 2430439 1942-03-20 63 SVO
-42 9.1 2430819 1943-04-04 2430765 1943-02-09 54 SVO
-41 8.3 2431140 1944-02-19 2431091 1944-01-01 49 AAVSO
-40 9.4 2431475 1945-01-19 2431416 1944-11-21 59 AAVSO
-39 8.5 2431790 1945-11-30 2431742 1945-10-13 48 AAVSO
-38 9.3 2432122 1946-10-28 2432068 1946-09-04 54 AAVSO
-37 8.8 2432447 1947-09-18 2432394 1947-07-27 53 AAVSO
-36 9.2 2432777 1948-08-13 2432720 1948-06-17 57 SVO
-35 8.9 2433098 1949-06-30 2433045 1949-05-08 53 SVO
-34 9.1 2433427 1950-05-25 2433371 1950-03-30 56 SVO
-33 9.0 2433740 1951-04-03 2433697 1951-02-19 43 SVO
-32 8.4 2434057 1952-02-14 2434023 1952-01-11 34 SVO
-31 10.2 2434393 1953-01-15 2434349 1952-12-02 44 AAVSO
-30 9.5 2434721 1953-12-09 2434674 1953-10-23 47 AAVSO
-29 9.0 2435028 1954-10-12 2435000 1954-09-14 28 AAVSO
-28 8.6 2435350 1955-08-30 2435326 1955-08-06 24 SVO
-27 9.3 2435678 1956-07-23 2435652 1956-06-27 26 SVO
-26 9.3 2436011 1957-06-21 2435977 1957-05-18 34 SVO
-25 8.3 2436333 1958-05-09 2436303 1958-04-09 30 SVO
-24 9.3 2436662 1959-04-03 2436629 1959-03-01 33 SVO
-23 8.9 2436984 1960-02-19 2436955 1960-01-21 29 SVO
-22 9.4 2437315 1961-01-15 2437281 1960-12-12 34 AAVSO
-21 9.0 2437635 1961-12-01 2437606 1961-11-02 29 AAVSO
-20 8.8 2437971 1962-11-02 2437932 1962-09-24 39 AAVSO
-19 10.0 2438292 1963-09-19 2438258 1963-08-16 34 AAVSO
-18 9.5 2438623 1964-08-15 2438584 1964-07-07 39 SVO
-17 8.9 2438950 1965-07-08 2438910 1965-05-29 40 SVO
-16 8.7 2439262 1966-05-16 2439235 1966-04-19 27 SVO
-15 8.4 2439585 1967-04-04 2439561 1967-03-11 24 SVO
-14 8.3 2439907 1968-02-20 2439887 1968-01-31 20 SVO
-13 9.1 2440236 1969-01-14 2440213 1968-12-22 23 SVO
-12 9.0 2440554 1969-11-28 2440539 1969-11-13 15 SVO
-11 9.4 2440876 1970-10-16 2440864 1970-10-04 12 SVO
-10 8.3 2441196 1971-09-01 2441190 1971-08-26 6 SVO
-9 9.5 2441521 1972-07-22 2441516 1972-07-17 5 SVO
-8 8.6 2441836 1973-06-02 2441842 1973-06-08 -6 SVO
-7 8.9 2442161 1974-04-23 2442167 1974-04-29 -6 SVO
-6 8.9 2442494 1975-03-22 2442493 1975-03-21 1 SVO
-5 8.3 2442819 1976-02-10 2442819 1976-02-10 0 SVO
-4 9.7 2443146 1977-01-02 2443145 1977-01-01 1 SVO
-3 9.1 2443474 1977-11-26 2443471 1977-11-23 3 SVO
-2 9.2 2443795 1978-10-13 2443796 1978-10-14 -1 SVO
-1 8.8 2444122 1979-09-05 2444122 1979-09-05 0 SVO
0 8.3 2444447 1980-07-26 2444448 1980-07-27 -1 SVO
1 10.0 2444781 1981-06-25 2444774 1981-06-18 7 SVO
2 9.2 2445114 1982-05-24 2445100 1982-05-10 14 SVO
3 9.9 2445448 1983-04-23 2445425 1983-03-31 23 SVO
4 8.7 2445782 1984-03-22 2445751 1984-02-20 31 SVO
5 10.2 2446112 1985-02-15 2446077 1985-01-11 35 SVO
6 9.3 2446443 1986-01-12 2446403 1985-12-03 40 SVO
7 8.5 2446768 1986-12-03 2446729 1986-10-25 39 SVO
8 9.3 2447100 1987-10-31 2447054 1987-09-15 46 SVO
9 9.2 2447435 1988-09-30 2447380 1988-08-06 55 SVO
10 9.2 2447763 1989-08-24 2447706 1989-06-28 57 SVO
11 8.6 2448085 1990-07-12 2448032 1990-05-20 53 SVO
12 8.9 2448418 1991-06-10 2448357 1991-04-10 61 SVO
13 9.2 2448743 1992-04-30 2448683 1992-03-01 60 SVO
14 8.4 2449069 1993-03-22 2449009 1993-01-21 60 SVO
15 9.1 2449392 1994-02-08 2449335 1993-12-13 57 SVO
16 8.9 2449711 1994-12-24 2449661 1994-11-04 50 SVO
17 8.8 2450034 1995-11-12 2449986 1995-09-25 48 SVO
18 9.8 2450355 1996-09-28 2450312 1996-08-16 43 SVO
19 8.8 2450677 1997-08-16 2450638 1997-07-08 39 SVO
20 8.7 2450998 1998-07-03 2450964 1998-05-30 34 SVO
21 9.7 2451320 1999-05-21 2451290 1999-04-21 30 SVO
22 8.5 2451640 2000-04-05 2451615 2000-03-11 25 SVO
23 9.5 2451964 2001-02-23 2451941 2001-01-31 23 SVO
24 8.5 2452294 2002-01-19 2452267 2001-12-23 27 SVO
25 10.1 2452621 2002-12-12 2452593 2002-11-14 28 SVO
26 9.1 2452945 2003-11-01 2452919 2003-10-06 26 SVO
27 8.8 2453267 2004-09-18 2453244 2004-08-26 23 SVO
28 9.6 2453599 2005-08-16 2453570 2005-07-18 29 SVO
29 8.7 2453929 2006-07-12 2453896 2006-06-09 33 SVO
30 9.2 2454252 2007-05-31 2454222 2007-05-01 30 SVO
31 9.2 2454590 2008-05-03 2454547 2008-03-21 43 SVO
32 8.7 2454916 2009-03-25 2454873 2009-02-10 43 SVO
33 8.6 2455242 2010-02-14 2455199 2010-01-02 43 SVO
34 9.4 2455581 2011-01-19 2455525 2010-11-24 56 SVO
35 8.6 2455911 2011-12-15 2455851 2011-10-16 60 SVO
36 9.3 2456235 2012-11-03 2456176 2012-09-05 59 SVO
37 8.7 2456561 2013-09-25 2456502 2013-07-28 59 SVO
38 9.1 2456889 2014-08-19 2456828 2014-06-19 61 SVO
39 8.7 2457220 2015-07-16 2457154 2015-05-11 66 SVO
40 8.8 2457550 2016-06-10 2457480 2016-04-01 70 SVO
41 8.4 2457874 2017-04-30 2457805 2017-02-20 69 SVO
42 9.0 2458205 2018-03-27 2458131 2018-01-12 74 SVO
43 8.8 2458537 2019-02-22 2458457 2018-12-04 80 SVO
44 8.6 2458857 2020-01-08 2458783 2019-10-26 74 SVO
45 8.7 2459187 2020-12-03 2459109 2020-09-16 78 SVO
46 8.9 2459511 2021-10-23 2459434 2021-08-07 77 SVO
47 8.5 2459837 2022-09-14 2459760 2022-06-29 77 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.