Maxima for S UMa
Period: 225.96, Epoch: 2445773.7
AAVSO offset: 4

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-228   2394302 1843-04-11 2394255 1843-02-23 47 AnHar, 1909, vol 55, p 95
-226   2394719 1844-06-01 2394707 1844-05-20 12 AnHar, 1909, vol 55, p 95
-218   2396536 1849-05-23 2396515 1849-05-02 21 AnHar, 1909, vol 55, p 95
-211   2398094 1853-08-28 2398097 1853-08-31 -3 AnHar, 1909, vol 55, p 95
-210 7.7 2398333 1854-04-24 2398323 1854-04-14 10 SVO
-209 7.9 2398546 1854-11-23 2398549 1854-11-26 -3 SVO
-208 7.8 2398764 1855-06-29 2398775 1855-07-10 -11 SVO
-207 8.0 2398996 1856-02-16 2399001 1856-02-21 -5 SVO
-206 7.9 2399217 1856-09-24 2399227 1856-10-04 -10 SVO
-205 7.9 2399437 1857-05-02 2399452 1857-05-17 -15 SVO
-204 7.8 2399674 1857-12-25 2399678 1857-12-29 -4 SVO
-203 7.9 2399902 1858-08-10 2399904 1858-08-12 -2 SVO
-202   2400109 1859-03-05 2400130 1859-03-26 -21 AnHar, 1909, vol 55, p 95
-201 7.8 2400342 1859-10-24 2400356 1859-11-07 -14 SVO
-200 7.8 2400573 1860-06-11 2400582 1860-06-20 -9 SVO
-199 7.9 2400806 1861-01-30 2400808 1861-02-01 -2 SVO
-198 7.8 2401026 1861-09-07 2401034 1861-09-15 -8 SVO
-197 7.9 2401251 1862-04-20 2401260 1862-04-29 -9 SVO
-196   2401480 1862-12-05 2401486 1862-12-11 -6 VeBam, 1931, vol 3, p 1
-194   2401904 1864-02-02 2401938 1864-03-07 -34 AnHar, 1909, vol 55, p 95
-193   2402157 1864-10-12 2402164 1864-10-19 -7 VeBam, 1931, vol 3, p 1
-192 8.0 2402368 1865-05-11 2402390 1865-06-02 -22 SVO
-191 8.1 2402597 1865-12-26 2402616 1866-01-14 -19 SVO
-190 7.9 2402814 1866-07-31 2402842 1866-08-28 -28 SVO
-189 8.0 2403031 1867-03-05 2403068 1867-04-11 -37 SVO
-188   2403259 1867-10-19 2403294 1867-11-23 -35 AnHar, 1909, vol 55, p 95
-187 7.8 2403490 1868-06-06 2403520 1868-07-06 -30 SVO
-186 8.0 2403717 1869-01-19 2403746 1869-02-17 -29 SVO
-185 8.0 2403930 1869-08-20 2403972 1869-10-01 -42 SVO
-184 8.1 2404150 1870-03-28 2404198 1870-05-15 -48 SVO
-183 8.0 2404385 1870-11-18 2404424 1870-12-27 -39 SVO
-182 7.9 2404620 1871-07-11 2404649 1871-08-09 -29 SVO
-181 7.8 2404843 1872-02-19 2404875 1872-03-22 -32 SVO
-180 7.9 2405075 1872-10-08 2405101 1872-11-03 -26 SVO
-179   2405290 1873-05-11 2405327 1873-06-17 -37 AnHar, 1909, vol 55, p 95
-178 8.1 2405519 1873-12-26 2405553 1874-01-29 -34 SVO
-177 8.0 2405748 1874-08-12 2405779 1874-09-12 -31 SVO
-176 7.9 2405972 1875-03-24 2406005 1875-04-26 -33 SVO
-175   2406207 1875-11-14 2406231 1875-12-08 -24 GuL, 1918, 1.1
-174   2406420 1876-06-14 2406457 1876-07-21 -37 AnHar, 1909, vol 55, p 95
-173   2406684 1877-03-05 2406683 1877-03-04 1 AnHar, 1909, vol 55, p 95
-172   2406889 1877-09-26 2406909 1877-10-16 -20 AnHar, 1909, vol 55, p 95
-171   2407112 1878-05-07 2407135 1878-05-30 -23 AnHar, 1909, vol 55, p 95
-170   2407355 1879-01-05 2407361 1879-01-11 -6 GuL, 1918, 1.1
-169   2407595 1879-09-02 2407587 1879-08-25 8 AnHar, 1909, vol 55, p 95
-168   2407826 1880-04-20 2407813 1880-04-07 13 AnHar, 1909, vol 55, p 95
-167   2408058 1880-12-08 2408039 1880-11-19 19 AnHar, 1909, vol 55, p 95
-166   2408299 1881-08-06 2408265 1881-07-03 34 AnHar, 1909, vol 55, p 95
-165   2408513 1882-03-08 2408491 1882-02-14 22 AnHar, 1909, vol 55, p 95
-164   2408745 1882-10-26 2408717 1882-09-28 28 AnHar, 1909, vol 55, p 95
-163   2408977 1883-06-15 2408943 1883-05-12 34 AnHar, 1909, vol 55, p 95
-162   2409194 1884-01-18 2409169 1883-12-24 25 AnHar, 1909, vol 55, p 95
-161   2409438 1884-09-18 2409395 1884-08-06 43 AnHar, 1909, vol 55, p 95
-160 8.1 2409663 1885-05-01 2409621 1885-03-20 42 SVO
-159   2409901 1885-12-25 2409847 1885-11-01 54 AnHar, 1909, vol 55, p 95
-158   2410129 1886-08-10 2410072 1886-06-14 57 AnHar, 1909, vol 55, p 95
-157 8.2 2410360 1887-03-29 2410298 1887-01-26 62 SVO
-156 8.4 2410568 1887-10-23 2410524 1887-09-09 44 SVO
-155   2410801 1888-06-12 2410750 1888-04-22 51 AnHar, 1909, vol 55, p 95
-154 8.4 2411041 1889-02-07 2410976 1888-12-04 65 SVO
-153 8.2 2411255 1889-09-09 2411202 1889-07-18 53 SVO
-152   2411480 1890-04-22 2411428 1890-03-01 52 AnHar, 1909, vol 55, p 95
-151 8.0 2411707 1890-12-05 2411654 1890-10-13 53 SVO
-150 7.9 2411934 1891-07-20 2411880 1891-05-27 54 SVO
-149 7.9 2412156 1892-02-27 2412106 1892-01-08 50 SVO
-148   2412373 1892-10-01 2412332 1892-08-21 41 AnHar, 1909, vol 55, p 95
-147 8.0 2412598 1893-05-14 2412558 1893-04-04 40 SVO
-146 8.0 2412820 1893-12-22 2412784 1893-11-16 36 SVO
-145 7.7 2413049 1894-08-08 2413010 1894-06-30 39 SVO
-144 7.8 2413273 1895-03-20 2413236 1895-02-11 37 SVO
-143 8.0 2413502 1895-11-04 2413462 1895-09-25 40 SVO
-142 7.8 2413718 1896-06-07 2413688 1896-05-08 30 SVO
-141   2413957 1897-02-01 2413914 1896-12-20 43 AnHar, 1909, vol 55, p 95
-140   2414177 1897-09-09 2414140 1897-08-03 37 AnHar, 1909, vol 55, p 95
-139   2414402 1898-04-22 2414366 1898-03-17 36 AnHar, 1909, vol 55, p 95
-138 8.0 2414619 1898-11-25 2414592 1898-10-29 27 SVO
-137   2414853 1899-07-17 2414818 1899-06-12 35 AnHar, 1909, vol 55, p 95
-136 8.0 2415064 1900-02-13 2415044 1900-01-24 20 SVO
-135 8.0 2415302 1900-10-09 2415269 1900-09-06 33 SVO
-134 8.0 2415516 1901-05-11 2415495 1901-04-20 21 SVO
-133 7.9 2415741 1901-12-22 2415721 1901-12-02 20 SVO
-132 7.9 2415965 1902-08-03 2415947 1902-07-16 18 SVO
-131 8.0 2416184 1903-03-10 2416173 1903-02-27 11 SVO
-130 7.8 2416411 1903-10-23 2416399 1903-10-11 12 SVO
-129 7.8 2416633 1904-06-01 2416625 1904-05-24 8 SVO
-128 8.0 2416864 1905-01-18 2416851 1905-01-05 13 SVO
-127 7.7 2417086 1905-08-28 2417077 1905-08-19 9 SVO
-126 7.7 2417309 1906-04-08 2417303 1906-04-02 6 SVO
-125 7.9 2417534 1906-11-19 2417529 1906-11-14 5 SVO
-124 8.0 2417755 1907-06-28 2417755 1907-06-28 0 SVO
-123 7.9 2417981 1908-02-09 2417981 1908-02-09 0 SVO
-122 7.9 2418211 1908-09-26 2418207 1908-09-22 4 SVO
-121 7.9 2418428 1909-05-01 2418433 1909-05-06 -5 SVO
-120 8.0 2418649 1909-12-08 2418659 1909-12-18 -10 SVO
-119 7.8 2418872 1910-07-19 2418885 1910-08-01 -13 SVO
-118 8.0 2419103 1911-03-07 2419111 1911-03-15 -8 SVO
-117 7.8 2419336 1911-10-26 2419337 1911-10-27 -1 SVO
-116 7.9 2419551 1912-05-28 2419563 1912-06-09 -12 SVO
-115 7.9 2419783 1913-01-15 2419789 1913-01-21 -6 SVO
-114 7.8 2420006 1913-08-26 2420015 1913-09-04 -9 SVO
-113 7.8 2420216 1914-03-24 2420241 1914-04-18 -25 SVO
-112 7.9 2420438 1914-11-01 2420466 1914-11-29 -28 SVO
-111 8.0 2420666 1915-06-17 2420692 1915-07-13 -26 SVO
-110 7.9 2420887 1916-01-24 2420918 1916-02-24 -31 SVO
-109 7.9 2421114 1916-09-07 2421144 1916-10-07 -30 SVO
-108 7.9 2421335 1917-04-16 2421370 1917-05-21 -35 SVO
-107 8.0 2421557 1917-11-24 2421596 1918-01-02 -39 SVO
-106 7.9 2421779 1918-07-04 2421822 1918-08-16 -43 SVO
-105 7.9 2422005 1919-02-15 2422048 1919-03-30 -43 SVO
-104 7.8 2422228 1919-09-26 2422274 1919-11-11 -46 SVO
-103 8.0 2422459 1920-05-14 2422500 1920-06-24 -41 SVO
-102 7.9 2422676 1920-12-17 2422726 1921-02-05 -50 SVO
-101 7.8 2422903 1921-08-01 2422952 1921-09-19 -49 SVO
-100 7.9 2423131 1922-03-17 2423178 1922-05-03 -47 SVO
-99 7.8 2423357 1922-10-29 2423404 1922-12-15 -47 SVO
-98 7.9 2423584 1923-06-13 2423630 1923-07-29 -46 SVO
-97 8.0 2423824 1924-02-08 2423856 1924-03-11 -32 SVO
-96 8.0 2424040 1924-09-11 2424082 1924-10-23 -42 SVO
-95 8.0 2424269 1925-04-28 2424308 1925-06-06 -39 SVO
-94 7.9 2424488 1925-12-03 2424534 1926-01-18 -46 SVO
-93 7.9 2424720 1926-07-23 2424760 1926-09-01 -40 SVO
-92 7.9 2424943 1927-03-03 2424986 1927-04-15 -43 SVO
-91 7.8 2425179 1927-10-25 2425212 1927-11-27 -33 SVO
-90 7.9 2425410 1928-06-12 2425438 1928-07-10 -28 SVO
-89 7.9 2425635 1929-01-23 2425664 1929-02-21 -29 SVO
-88 8.0 2425857 1929-09-02 2425889 1929-10-04 -32 SVO
-87 7.9 2426086 1930-04-19 2426115 1930-05-18 -29 SVO
-86 7.9 2426317 1930-12-06 2426341 1930-12-30 -24 SVO
-85 8.0 2426557 1931-08-03 2426567 1931-08-13 -10 SVO
-84 7.8 2426784 1932-03-17 2426793 1932-03-26 -9 SVO
-83 7.9 2427010 1932-10-29 2427019 1932-11-07 -9 SVO
-82 7.8 2427238 1933-06-14 2427245 1933-06-21 -7 SVO
-81 7.9 2427471 1934-02-02 2427471 1934-02-02 0 SVO
-80 7.8 2427699 1934-09-18 2427697 1934-09-16 2 SVO
-79 7.8 2427920 1935-04-27 2427923 1935-04-30 -3 SVO
-78 7.9 2428148 1935-12-11 2428149 1935-12-12 -1 SVO
-77 7.7 2428377 1936-07-27 2428375 1936-07-25 2 SVO
-76 7.9 2428608 1937-03-15 2428601 1937-03-08 7 SVO
-75 7.8 2428838 1937-10-31 2428827 1937-10-20 11 SVO
-74 7.9 2429062 1938-06-12 2429053 1938-06-03 9 SVO
-73 8.0 2429287 1939-01-23 2429279 1939-01-15 8 SVO
-72 8.0 2429521 1939-09-14 2429505 1939-08-29 16 SVO
-71 7.8 2429741 1940-04-21 2429731 1940-04-11 10 SVO
-70 8.0 2429969 1940-12-05 2429957 1940-11-23 12 SVO
-69 7.9 2430193 1941-07-17 2430183 1941-07-07 10 SVO
-68 8.0 2430426 1942-03-07 2430409 1942-02-18 17 SVO
-67 7.7 2430649 1942-10-16 2430635 1942-10-02 14 SVO
-66 8.0 2430875 1943-05-30 2430861 1943-05-16 14 SVO
-65 8.0 2431109 1944-01-19 2431086 1943-12-27 23 SVO
-64 7.7 2431324 1944-08-21 2431312 1944-08-09 12 SVO
-63 8.0 2431562 1945-04-16 2431538 1945-03-23 24 SVO
-62 7.8 2431778 1945-11-18 2431764 1945-11-04 14 SVO
-61 8.0 2432017 1946-07-15 2431990 1946-06-18 27 SVO
-60 7.8 2432226 1947-02-09 2432216 1947-01-30 10 SVO
-59 7.9 2432461 1947-10-02 2432442 1947-09-13 19 SVO
-58 7.8 2432686 1948-05-14 2432668 1948-04-26 18 SVO
-57 7.8 2432914 1948-12-28 2432894 1948-12-08 20 SVO
-56 7.8 2433138 1949-08-09 2433120 1949-07-22 18 SVO
-55 7.8 2433368 1950-03-27 2433346 1950-03-05 22 SVO
-54 8.0 2433592 1950-11-06 2433572 1950-10-17 20 SVO
-53 8.0 2433817 1951-06-19 2433798 1951-05-31 19 SVO
-52 7.9 2434041 1952-01-29 2434024 1952-01-12 17 SVO
-51 7.8 2434266 1952-09-10 2434250 1952-08-25 16 SVO
-50 8.1 2434500 1953-05-02 2434476 1953-04-08 24 SVO
-49 7.9 2434723 1953-12-11 2434702 1953-11-20 21 SVO
-48 7.9 2434940 1954-07-16 2434928 1954-07-04 12 SVO
-47 8.0 2435163 1955-02-24 2435154 1955-02-15 9 SVO
-46 7.9 2435391 1955-10-10 2435380 1955-09-29 11 SVO
-45 8.0 2435614 1956-05-20 2435606 1956-05-12 8 SVO
-44 7.9 2435832 1956-12-24 2435832 1956-12-24 0 SVO
-43 7.9 2436053 1957-08-02 2436058 1957-08-07 -5 SVO
-42 8.0 2436282 1958-03-19 2436284 1958-03-21 -2 SVO
-41 7.9 2436515 1958-11-07 2436509 1958-11-01 6 SVO
-40 8.0 2436736 1959-06-16 2436735 1959-06-15 1 SVO
-39 8.0 2436959 1960-01-25 2436961 1960-01-27 -2 SVO
-38 8.0 2437188 1960-09-10 2437187 1960-09-09 1 SVO
-37 7.9 2437405 1961-04-15 2437413 1961-04-23 -8 SVO
-36 7.9 2437633 1961-11-29 2437639 1961-12-05 -6 SVO
-35 7.8 2437858 1962-07-12 2437865 1962-07-19 -7 SVO
-34 8.0 2438080 1963-02-19 2438091 1963-03-02 -11 SVO
-33 7.9 2438311 1963-10-08 2438317 1963-10-14 -6 SVO
-32 7.9 2438541 1964-05-25 2438543 1964-05-27 -2 SVO
-31 8.0 2438764 1965-01-03 2438769 1965-01-08 -5 SVO
-30 7.8 2438987 1965-08-14 2438995 1965-08-22 -8 SVO
-29 8.0 2439219 1966-04-03 2439221 1966-04-05 -2 SVO
-28 7.8 2439438 1966-11-08 2439447 1966-11-17 -9 SVO
-27 7.9 2439664 1967-06-22 2439673 1967-07-01 -9 SVO
-26 7.9 2439891 1968-02-04 2439899 1968-02-12 -8 SVO
-25 7.9 2440118 1968-09-18 2440125 1968-09-25 -7 SVO
-24 7.9 2440351 1969-05-09 2440351 1969-05-09 0 SVO
-23 7.9 2440576 1969-12-20 2440577 1969-12-21 -1 SVO
-22 7.9 2440802 1970-08-03 2440803 1970-08-04 -1 SVO
-21 8.0 2441030 1971-03-19 2441029 1971-03-18 1 SVO
-20 7.9 2441258 1971-11-02 2441255 1971-10-30 3 SVO
-19 7.9 2441494 1972-06-25 2441481 1972-06-12 13 SVO
-18 7.9 2441717 1973-02-03 2441706 1973-01-23 11 SVO
-17 8.0 2441942 1973-09-16 2441932 1973-09-06 10 SVO
-16 7.9 2442162 1974-04-24 2442158 1974-04-20 4 SVO
-15 7.9 2442388 1974-12-06 2442384 1974-12-02 4 SVO
-14 8.1 2442623 1975-07-29 2442610 1975-07-16 13 SVO
-13 7.9 2442846 1976-03-08 2442836 1976-02-27 10 SVO
-12 7.9 2443070 1976-10-18 2443062 1976-10-10 8 SVO
-11 7.9 2443301 1977-06-06 2443288 1977-05-24 13 SVO
-10 7.9 2443521 1978-01-12 2443514 1978-01-05 7 SVO
-9 8.0 2443752 1978-08-31 2443740 1978-08-19 12 SVO
-8 8.0 2443978 1979-04-14 2443966 1979-04-02 12 SVO
-7 7.9 2444204 1979-11-26 2444192 1979-11-14 12 SVO
-6 7.9 2444424 1980-07-03 2444418 1980-06-27 6 SVO
-5 8.0 2444659 1981-02-23 2444644 1981-02-08 15 SVO
-4 7.9 2444874 1981-09-26 2444870 1981-09-22 4 SVO
-3 7.8 2445096 1982-05-06 2445096 1982-05-06 0 SVO
-2 7.8 2445323 1982-12-19 2445322 1982-12-18 1 SVO
-1 8.0 2445555 1983-08-08 2445548 1983-08-01 7 SVO
0 7.9 2445779 1984-03-19 2445774 1984-03-14 5 SVO
1 7.9 2446000 1984-10-26 2446000 1984-10-26 0 SVO
2 8.0 2446227 1985-06-10 2446226 1985-06-09 1 SVO
3 7.9 2446449 1986-01-18 2446452 1986-01-21 -3 SVO
4 8.1 2446683 1986-09-09 2446678 1986-09-04 5 SVO
5 8.0 2446903 1987-04-17 2446903 1987-04-17 0 SVO
6 7.9 2447133 1987-12-03 2447129 1987-11-29 4 SVO
7 7.8 2447357 1988-07-14 2447355 1988-07-12 2 SVO
8 7.9 2447584 1989-02-26 2447581 1989-02-23 3 SVO
9 7.9 2447820 1989-10-20 2447807 1989-10-07 13 SVO
10 7.9 2448045 1990-06-02 2448033 1990-05-21 12 SVO
11 7.9 2448270 1991-01-13 2448259 1991-01-02 11 SVO
12 7.8 2448480 1991-08-11 2448485 1991-08-16 -5 SVO
13 8.0 2448711 1992-03-29 2448711 1992-03-29 0 SVO
14 7.8 2448929 1992-11-02 2448937 1992-11-10 -8 SVO
15 7.9 2449160 1993-06-21 2449163 1993-06-24 -3 SVO
16 7.9 2449387 1994-02-03 2449389 1994-02-05 -2 SVO
17 7.9 2449610 1994-09-14 2449615 1994-09-19 -5 SVO
18 8.0 2449833 1995-04-25 2449841 1995-05-03 -8 SVO
19 7.9 2450050 1995-11-28 2450067 1995-12-15 -17 SVO
20 8.0 2450279 1996-07-14 2450293 1996-07-28 -14 SVO
21 7.9 2450503 1997-02-23 2450519 1997-03-11 -16 SVO
22 7.9 2450722 1997-09-30 2450745 1997-10-23 -23 SVO
23 7.8 2450945 1998-05-11 2450971 1998-06-06 -26 SVO
24 8.0 2451175 1998-12-27 2451197 1999-01-18 -22 SVO
25 7.8 2451394 1999-08-03 2451423 1999-09-01 -29 SVO
26 7.9 2451614 2000-03-10 2451649 2000-04-14 -35 SVO
27 7.9 2451842 2000-10-24 2451875 2000-11-26 -33 SVO
28 7.9 2452082 2001-06-21 2452101 2001-07-10 -19 SVO
29 7.9 2452296 2002-01-21 2452326 2002-02-20 -30 SVO
30 7.9 2452519 2002-09-01 2452552 2002-10-04 -33 SVO
31 7.9 2452745 2003-04-15 2452778 2003-05-18 -33 SVO
32 8.0 2452971 2003-11-27 2453004 2003-12-30 -33 SVO
33 7.9 2453198 2004-07-11 2453230 2004-08-12 -32 SVO
34 7.8 2453423 2005-02-21 2453456 2005-03-26 -33 SVO
35 7.8 2453657 2005-10-13 2453682 2005-11-07 -25 SVO
36 8.0 2453895 2006-06-08 2453908 2006-06-21 -13 SVO
37 7.9 2454122 2007-01-21 2454134 2007-02-02 -12 SVO
38 8.0 2454343 2007-08-30 2454360 2007-09-16 -17 SVO
39 7.9 2454567 2008-04-10 2454586 2008-04-29 -19 SVO
40 7.9 2454794 2008-11-23 2454812 2008-12-11 -18 SVO
41 8.1 2455024 2009-07-11 2455038 2009-07-25 -14 SVO
42 8.1 2455252 2010-02-24 2455264 2010-03-08 -12 SVO
43 7.9 2455485 2010-10-15 2455490 2010-10-20 -5 SVO
44 8.2 2455714 2011-06-01 2455716 2011-06-03 -2 SVO
45 8.1 2455936 2012-01-09 2455942 2012-01-15 -6 SVO
46 8.2 2456170 2012-08-30 2456168 2012-08-28 2 SVO
47 8.1 2456405 2013-04-22 2456394 2013-04-11 11 SVO
48 8.2 2456632 2013-12-05 2456620 2013-11-23 12 SVO
49 8.1 2456859 2014-07-20 2456846 2014-07-07 13 SVO
50 8.1 2457085 2015-03-03 2457072 2015-02-18 13 SVO
51 8.3 2457327 2015-10-31 2457298 2015-10-02 29 SVO
52 8.2 2457551 2016-06-11 2457523 2016-05-14 28 SVO
53 8.1 2457776 2017-01-22 2457749 2016-12-26 27 SVO
54 8.1 2458003 2017-09-06 2457975 2017-08-09 28 SVO
55 8.0 2458223 2018-04-14 2458201 2018-03-23 22 SVO
56 8.1 2458452 2018-11-29 2458427 2018-11-04 25 SVO
57 8.1 2458683 2019-07-18 2458653 2019-06-18 30 SVO
58 8.1 2458906 2020-02-26 2458879 2020-01-30 27 SVO
59 8.2 2459128 2020-10-05 2459105 2020-09-12 23 SVO
60 8.0 2459350 2021-05-15 2459331 2021-04-26 19 SVO
61 8.2 2459591 2022-01-11 2459557 2021-12-08 34 SVO
62 8.1 2459815 2022-08-23 2459783 2022-07-22 32 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.