Maxima for X UMa
Period: 249.04, Epoch: 2445707
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-133   2412570 1893-04-16 2412585 1893-05-01 -15 SVO
-129   2413580 1896-01-21 2413581 1896-01-22 -1 AnHar, 1909, vol 55, p 95
-123   2415070 1900-02-19 2415075 1900-02-24 -5 SVO
-120   2415819 1902-03-10 2415822 1902-03-13 -3 AnHar, 1909, vol 55, p 95
-119   2416055 1902-11-01 2416071 1902-11-17 -16 GuL, 1918, 1.1
-117 10.3 2416554 1904-03-14 2416569 1904-03-29 -15 SVO
-116 9.6 2416792 1904-11-07 2416818 1904-12-03 -26 AAVSO
-115   2417058 1905-07-31 2417067 1905-08-09 -9 AAVSO
-114 10.2 2417299 1906-03-29 2417316 1906-04-15 -17 AAVSO
-113   2417544 1906-11-29 2417565 1906-12-20 -21 AAVSO
-112   2417786 1907-07-29 2417815 1907-08-27 -29 AAVSO
-111   2418024 1908-03-23 2418064 1908-05-02 -40 AAVSO
-110 9.3 2418288 1908-12-12 2418313 1909-01-06 -25 AAVSO
-109   2418546 1909-08-27 2418562 1909-09-12 -16 AAVSO
-108 8.8 2418795 1910-05-03 2418811 1910-05-19 -16 AAVSO
-107   2419035 1910-12-29 2419060 1911-01-23 -25 SVO
-105   2419526 1912-05-03 2419558 1912-06-04 -32 AAVSO
-104   2419777 1913-01-09 2419807 1913-02-08 -30 AAVSO
-101   2420514 1915-01-16 2420554 1915-02-25 -40 SVO
-99   2421016 1916-06-01 2421052 1916-07-07 -36 AAVSO
-98 9.3 2421273 1917-02-13 2421301 1917-03-13 -28 AAVSO
-97   2421536 1917-11-03 2421550 1917-11-17 -14 AAVSO
-96 9.2 2421785 1918-07-10 2421799 1918-07-24 -14 AAVSO
-95   2422023 1919-03-05 2422048 1919-03-30 -25 AAVSO
-94 9.1 2422271 1919-11-08 2422297 1919-12-04 -26 AAVSO
-92 9.4 2422773 1921-03-24 2422795 1921-04-15 -22 SVO
-91 9.5 2423020 1921-11-26 2423044 1921-12-20 -24 AAVSO
-90   2423279 1922-08-12 2423293 1922-08-26 -14 AAVSO
-89 9.6 2423524 1923-04-14 2423542 1923-05-02 -18 SVO
-88 9.6 2423770 1923-12-16 2423791 1924-01-06 -21 AAVSO
-87 10.0 2424018 1924-08-20 2424041 1924-09-12 -23 AAVSO
-86 9.8 2424274 1925-05-03 2424290 1925-05-19 -16 AAVSO
-85 9.4 2424524 1926-01-08 2424539 1926-01-23 -15 AAVSO
-84   2424774 1926-09-15 2424788 1926-09-29 -14 AAVSO
-83 9.5 2425010 1927-05-09 2425037 1927-06-05 -27 AAVSO
-82 9.4 2425260 1928-01-14 2425286 1928-02-09 -26 AAVSO
-81   2425509 1928-09-19 2425535 1928-10-15 -26 AAVSO
-80   2425764 1929-06-01 2425784 1929-06-21 -20 AAVSO
-79 9.9 2426003 1930-01-26 2426033 1930-02-25 -30 AAVSO
-78 9.2 2426247 1930-09-27 2426282 1930-11-01 -35 AAVSO
-77 9.5 2426494 1931-06-01 2426531 1931-07-08 -37 AAVSO
-76 9.7 2426740 1932-02-02 2426780 1932-03-13 -40 SVO
-75 10.2 2426984 1932-10-03 2427029 1932-11-17 -45 AAVSO
-74 9.7 2427234 1933-06-10 2427278 1933-07-24 -44 AAVSO
-73 10.2 2427487 1934-02-18 2427527 1934-03-30 -40 AAVSO
-72 9.4 2427734 1934-10-23 2427776 1934-12-04 -42 AAVSO
-71   2427992 1935-07-08 2428025 1935-08-10 -33 AAVSO
-70 10.4 2428255 1936-03-27 2428274 1936-04-15 -19 SVO
-69 9.8 2428508 1936-12-05 2428523 1936-12-20 -15 AAVSO
-68 10.3 2428747 1937-08-01 2428772 1937-08-26 -25 AAVSO
-67 9.9 2428998 1938-04-09 2429021 1938-05-02 -23 SVO
-66 10.3 2429245 1938-12-12 2429270 1939-01-06 -25 SVO
-65 9.8 2429488 1939-08-12 2429519 1939-09-12 -31 AAVSO
-64 10.1 2429734 1940-04-14 2429768 1940-05-18 -34 AAVSO
-63 9.2 2429990 1940-12-26 2430017 1941-01-22 -27 SVO
-62   2430230 1941-08-23 2430267 1941-09-29 -37 AAVSO
-61 9.9 2430486 1942-05-06 2430516 1942-06-05 -30 AAVSO
-60 10.3 2430736 1943-01-11 2430765 1943-02-09 -29 AAVSO
-59   2430974 1943-09-06 2431014 1943-10-16 -40 AAVSO
-58 9.1 2431224 1944-05-13 2431263 1944-06-21 -39 AAVSO
-57 9.8 2431484 1945-01-28 2431512 1945-02-25 -28 AAVSO
-56 9.8 2431725 1945-09-26 2431761 1945-11-01 -36 AAVSO
-55 9.5 2431976 1946-06-04 2432010 1946-07-08 -34 AAVSO
-54 10.5 2432239 1947-02-22 2432259 1947-03-14 -20 SVO
-53 10.0 2432483 1947-10-24 2432508 1947-11-18 -25 AAVSO
-52   2432734 1948-07-01 2432757 1948-07-24 -23 AAVSO
-51 9.7 2432982 1949-03-06 2433006 1949-03-30 -24 SVO
-50 10.5 2433222 1949-11-01 2433255 1949-12-04 -33 AAVSO
-49   2433474 1950-07-11 2433504 1950-08-10 -30 AAVSO
-48 10.3 2433731 1951-03-25 2433753 1951-04-16 -22 SVO
-47 10.2 2433985 1951-12-04 2434002 1951-12-21 -17 AAVSO
-46 10.0 2434227 1952-08-02 2434251 1952-08-26 -24 AAVSO
-45 9.8 2434470 1953-04-02 2434500 1953-05-02 -30 SVO
-44 10.2 2434726 1953-12-14 2434749 1954-01-06 -23 AAVSO
-43   2434973 1954-08-18 2434998 1954-09-12 -25 AAVSO
-42 10.3 2435219 1955-04-21 2435247 1955-05-19 -28 SVO
-41 9.9 2435467 1955-12-25 2435496 1956-01-23 -29 SVO
-40 9.4 2435715 1956-08-29 2435745 1956-09-28 -30 AAVSO
-39 10.5 2435969 1957-05-10 2435994 1957-06-04 -25 SVO
-38 9.7 2436219 1958-01-15 2436243 1958-02-08 -24 AAVSO
-37 9.8 2436468 1958-09-21 2436493 1958-10-16 -25 AAVSO
-36 9.7 2436709 1959-05-20 2436742 1959-06-22 -33 AAVSO
-35 9.7 2436960 1960-01-26 2436991 1960-02-26 -31 SVO
-34   2437213 1960-10-05 2437240 1960-11-01 -27 AAVSO
-33 11.1 2437463 1961-06-12 2437489 1961-07-08 -26 AAVSO
-32 10.1 2437717 1962-02-21 2437738 1962-03-14 -21 SVO
-31 9.4 2437962 1962-10-24 2437987 1962-11-18 -25 AAVSO
-30 10.4 2438206 1963-06-25 2438236 1963-07-25 -30 AAVSO
-29 10.7 2438465 1964-03-10 2438485 1964-03-30 -20 SVO
-28 9.4 2438711 1964-11-11 2438734 1964-12-04 -23 AAVSO
-27   2438961 1965-07-19 2438983 1965-08-10 -22 AAVSO
-26 9.9 2439213 1966-03-28 2439232 1966-04-16 -19 SVO
-25 10.1 2439463 1966-12-03 2439481 1966-12-21 -18 SVO
-24 9.0 2439704 1967-08-01 2439730 1967-08-27 -26 AAVSO
-23 10.7 2439962 1968-04-15 2439979 1968-05-02 -17 SVO
-22 10.0 2440219 1968-12-28 2440228 1969-01-06 -9 AAVSO
-21 10.3 2440470 1969-09-05 2440477 1969-09-12 -7 AAVSO
-20 9.6 2440713 1970-05-06 2440726 1970-05-19 -13 SVO
-19 9.9 2440958 1971-01-06 2440975 1971-01-23 -17 SVO
-18 9.6 2441213 1971-09-18 2441224 1971-09-29 -11 AAVSO
-17 10.0 2441456 1972-05-18 2441473 1972-06-04 -17 AAVSO
-16 10.0 2441709 1973-01-26 2441722 1973-02-08 -13 SVO
-15 9.8 2441956 1973-09-30 2441971 1973-10-15 -15 AAVSO
-14 9.5 2442201 1974-06-02 2442220 1974-06-21 -19 SVO
-13 10.0 2442451 1975-02-07 2442469 1975-02-25 -18 SVO
-12 9.8 2442701 1975-10-15 2442719 1975-11-02 -18 SVO
-11 9.5 2442951 1976-06-21 2442968 1976-07-08 -17 AAVSO
-10 9.7 2443206 1977-03-03 2443217 1977-03-14 -11 SVO
-9 9.7 2443454 1977-11-06 2443466 1977-11-18 -12 SVO
-8 11.5 2443708 1978-07-18 2443715 1978-07-25 -7 AAVSO
-7 9.6 2443961 1979-03-28 2443964 1979-03-31 -3 SVO
-6 10.3 2444218 1979-12-10 2444213 1979-12-05 5 SVO
-5 10.1 2444466 1980-08-14 2444462 1980-08-10 4 AAVSO
-4 10.4 2444709 1981-04-14 2444711 1981-04-16 -2 SVO
-3 10.3 2444958 1981-12-19 2444960 1981-12-21 -2 SVO
-2 12.5 2445212 1982-08-30 2445209 1982-08-27 3 AAVSO
-1 9.8 2445459 1983-05-04 2445458 1983-05-03 1 SVO
0 10.1 2445708 1984-01-08 2445707 1984-01-07 1 SVO
1 10.4 2445958 1984-09-14 2445956 1984-09-12 2 AAVSO
2 9.8 2446209 1985-05-23 2446205 1985-05-19 4 SVO
3 9.6 2446458 1986-01-27 2446454 1986-01-23 4 SVO
4 10.5 2446713 1986-10-09 2446703 1986-09-29 10 AAVSO
5 10.2 2446959 1987-06-12 2446952 1987-06-05 7 AAVSO
6 10.3 2447211 1988-02-19 2447201 1988-02-09 10 SVO
7   2447457 1988-10-22 2447450 1988-10-15 7 AAVSO
8   2447719 1989-07-11 2447699 1989-06-21 20 AAVSO
9 10.1 2447968 1990-03-17 2447948 1990-02-25 20 SVO
10 9.5 2448196 1990-10-31 2448197 1990-11-01 -1 SVO
11   2448444 1991-07-06 2448446 1991-07-08 -2 AAVSO
12 10.4 2448702 1992-03-20 2448695 1992-03-13 7 SVO
13 10.2 2448949 1992-11-22 2448945 1992-11-18 4 SVO
14   2449199 1993-07-30 2449194 1993-07-25 5 AAVSO
15 9.6 2449453 1994-04-10 2449443 1994-03-31 10 SVO
16 10.3 2449692 1994-12-05 2449692 1994-12-05 0 SVO
17   2449945 1995-08-15 2449941 1995-08-11 4 AAVSO
18 10.3 2450190 1996-04-16 2450190 1996-04-16 0 SVO
19 10.1 2450443 1996-12-25 2450439 1996-12-21 4 SVO
20   2450688 1997-08-27 2450688 1997-08-27 0 AAVSO
21 9.7 2450928 1998-04-24 2450937 1998-05-03 -9 SVO
22 9.3 2451172 1998-12-24 2451186 1999-01-07 -14 SVO
23   2451427 1999-09-05 2451435 1999-09-13 -8 AAVSO
24 10.2 2451682 2000-05-17 2451684 2000-05-19 -2 SVO
25 9.4 2451927 2001-01-17 2451933 2001-01-23 -6 SVO
26   2452179 2001-09-26 2452182 2001-09-29 -3 AAVSO
27 10.0 2452426 2002-05-31 2452431 2002-06-05 -5 SVO
28 10.0 2452675 2003-02-04 2452680 2003-02-09 -5 SVO
29   2452926 2003-10-13 2452929 2003-10-16 -3 AAVSO
30   2453176 2004-06-19 2453178 2004-06-21 -2 AAVSO
31 9.5 2453419 2005-02-17 2453427 2005-02-25 -8 SVO
32   2453676 2005-11-01 2453676 2005-11-01 0 AAVSO
33   2453919 2006-07-02 2453925 2006-07-08 -6 AAVSO
34 9.4 2454166 2007-03-06 2454174 2007-03-14 -8 SVO
35 10.5 2454416 2007-11-11 2454423 2007-11-18 -7 SVO
36 10.0 2454662 2008-07-14 2454672 2008-07-24 -10 SVO
37 10.1 2454915 2009-03-24 2454921 2009-03-30 -6 SVO
38 10.2 2455174 2009-12-08 2455171 2009-12-05 3 SVO
39 9.6 2455414 2010-08-05 2455420 2010-08-11 -6 SVO
40 10.3 2455668 2011-04-16 2455669 2011-04-17 -1 SVO
41 9.7 2455910 2011-12-14 2455918 2011-12-22 -8 SVO
42 10.1 2456151 2012-08-11 2456167 2012-08-27 -16 SVO
43 10.0 2456415 2013-05-02 2456416 2013-05-03 -1 SVO
44 10.3 2456658 2013-12-31 2456665 2014-01-07 -7 SVO
45 10.2 2456920 2014-09-19 2456914 2014-09-13 6 AAVSO
46 10.0 2457160 2015-05-17 2457163 2015-05-20 -3 SVO
47 9.8 2457406 2016-01-18 2457412 2016-01-24 -6 SVO
48 10.4 2457659 2016-09-27 2457661 2016-09-29 -2 AAVSO
49 10.2 2457902 2017-05-28 2457910 2017-06-05 -8 AAVSO
50 9.6 2458141 2018-01-22 2458159 2018-02-09 -18 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.