Maxima for R Lac
Period: 300.36, Epoch: 2441555.0
AAVSO offset: -1

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-141   2399246 1856-10-23 2399204 1856-09-11 42 AnHar, 1909, vol 55, p 95
-109   2408854 1883-02-12 2408816 1883-01-05 38 AnHar, 1909, vol 55, p 95
-108   2409161 1883-12-16 2409116 1883-11-01 45 AnHar, 1909, vol 55, p 95
-107   2409457 1884-10-07 2409416 1884-08-27 41 AnHar, 1909, vol 55, p 95
-102   2410961 1888-11-19 2410918 1888-10-07 43 AnHar, 1909, vol 55, p 95
-98   2412152 1892-02-23 2412120 1892-01-22 32 AnHar, 1909, vol 55, p 95
-97   2412438 1892-12-05 2412420 1892-11-17 18 AnHar, 1909, vol 55, p 95
-96   2412748 1893-10-11 2412720 1893-09-13 28 AnHar, 1909, vol 55, p 95
-95   2413051 1894-08-10 2413021 1894-07-11 30 AnHar, 1909, vol 55, p 95
-93   2413650 1896-03-31 2413621 1896-03-02 29 AnHar, 1909, vol 55, p 95
-91   2414252 1897-11-23 2414222 1897-10-24 30 AnHar, 1909, vol 55, p 95
-89   2414852 1899-07-16 2414823 1899-06-17 29 AnHar, 1909, vol 55, p 95
-86   2415760 1902-01-10 2415724 1901-12-05 36 AnHar, 1952, vol 118
-85   2416060 1902-11-06 2416024 1902-10-01 36 AnHar, 1952, vol 118
-84   2416350 1903-08-23 2416325 1903-07-29 25 AnHar, 1952, vol 118
-83 9.2 2416643 1904-06-11 2416625 1904-05-24 18 AAVSO
-82   2416941 1905-04-05 2416925 1905-03-20 16 AAVSO
-81 9.3 2417257 1906-02-15 2417226 1906-01-15 31 AAVSO
-80   2417556 1906-12-11 2417526 1906-11-11 30 AAVSO
-79 9.2 2417846 1907-09-27 2417827 1907-09-08 19 AAVSO
-78 8.8 2418149 1908-07-26 2418127 1908-07-04 22 SVO
-77   2418439 1909-05-12 2418427 1909-04-30 12 AAVSO
-76 8.7 2418729 1910-02-26 2418728 1910-02-25 1 AAVSO
-75 9.0 2419027 1910-12-21 2419028 1910-12-22 -1 SVO
-74 8.8 2419327 1911-10-17 2419328 1911-10-18 -1 AAVSO
-73   2419631 1912-08-16 2419629 1912-08-14 2 AAVSO
-72   2419929 1913-06-10 2419929 1913-06-10 0 AN, 1914, vol 199, p 209
-71   2420239 1914-04-16 2420229 1914-04-06 10 AN, 1915, vol 200, p 353
-70 8.2 2420537 1915-02-08 2420530 1915-02-01 7 AAVSO
-69 8.1 2420827 1915-11-25 2420830 1915-11-28 -3 AAVSO
-68 8.8 2421139 1916-10-02 2421130 1916-09-23 9 AAVSO
-67 9.5 2421433 1917-07-23 2421431 1917-07-21 2 SVO
-66 9.5 2421736 1918-05-22 2421731 1918-05-17 5 AAVSO
-65 9.3 2422027 1919-03-09 2422032 1919-03-14 -5 AAVSO
-64 9.2 2422323 1919-12-30 2422332 1920-01-08 -9 AAVSO
-63 10.1 2422630 1920-11-01 2422632 1920-11-03 -2 SVO
-62 9.2 2422926 1921-08-24 2422933 1921-08-31 -7 SVO
-61 8.9 2423219 1922-06-13 2423233 1922-06-27 -14 SVO
-60 9.2 2423529 1923-04-19 2423533 1923-04-23 -4 AAVSO
-59 9.1 2423818 1924-02-02 2423834 1924-02-18 -16 SVO
-58 8.9 2424112 1924-11-22 2424134 1924-12-14 -22 SVO
-57 9.6 2424423 1925-09-29 2424434 1925-10-10 -11 SVO
-56 8.9 2424721 1926-07-24 2424735 1926-08-07 -14 SVO
-55 9.0 2425026 1927-05-25 2425035 1927-06-03 -9 AAVSO
-54   2425331 1928-03-25 2425336 1928-03-30 -5 AAVSO
-53 9.1 2425612 1928-12-31 2425636 1929-01-24 -24 SVO
-52 9.1 2425922 1929-11-06 2425936 1929-11-20 -14 SVO
-51 9.4 2426226 1930-09-06 2426237 1930-09-17 -11 AAVSO
-50 8.8 2426525 1931-07-02 2426537 1931-07-14 -12 AAVSO
-49 9.1 2426819 1932-04-21 2426837 1932-05-09 -18 SVO
-48 8.8 2427113 1933-02-09 2427138 1933-03-06 -25 SVO
-47 9.6 2427418 1933-12-11 2427438 1933-12-31 -20 SVO
-46 9.2 2427716 1934-10-05 2427738 1934-10-27 -22 SVO
-45 9.7 2428022 1935-08-07 2428039 1935-08-24 -17 SVO
-44 9.4 2428315 1936-05-26 2428339 1936-06-19 -24 AAVSO
-43 9.2 2428616 1937-03-23 2428639 1937-04-15 -23 AAVSO
-42 9.3 2428922 1938-01-23 2428940 1938-02-10 -18 SVO
-41 9.2 2429222 1938-11-19 2429240 1938-12-07 -18 SVO
-40 9.3 2429515 1939-09-08 2429541 1939-10-04 -26 SVO
-39 8.8 2429818 1940-07-07 2429841 1940-07-30 -23 AAVSO
-38 8.9 2430124 1941-05-09 2430141 1941-05-26 -17 AAVSO
-37   2430417 1942-02-26 2430442 1942-03-23 -25 AAVSO
-36 9.2 2430734 1943-01-09 2430742 1943-01-17 -8 AAVSO
-35 8.9 2431021 1943-10-23 2431042 1943-11-13 -21 SVO
-34 8.6 2431315 1944-08-12 2431343 1944-09-09 -28 SVO
-33 9.1 2431624 1945-06-17 2431643 1945-07-06 -19 AAVSO
-32   2431919 1946-04-08 2431943 1946-05-02 -24 AAVSO
-31 9.3 2432232 1947-02-15 2432244 1947-02-27 -12 AAVSO
-30 9.6 2432523 1947-12-03 2432544 1947-12-24 -21 SVO
-29 8.9 2432819 1948-09-24 2432845 1948-10-20 -26 SVO
-28 9.6 2433120 1949-07-22 2433145 1949-08-16 -25 SVO
-27 9.0 2433426 1950-05-24 2433445 1950-06-12 -19 AAVSO
-26   2433727 1951-03-21 2433746 1951-04-09 -19 AAVSO
-25 9.0 2434013 1952-01-01 2434046 1952-02-03 -33 SVO
-24 9.3 2434315 1952-10-29 2434346 1952-11-29 -31 SVO
-23 9.5 2434621 1953-08-31 2434647 1953-09-26 -26 AAVSO
-22 9.0 2434925 1954-07-01 2434947 1954-07-23 -22 AAVSO
-21   2435220 1955-04-22 2435247 1955-05-19 -27 AAVSO
-20 10.4 2435530 1956-02-26 2435548 1956-03-15 -18 AAVSO
-19 9.0 2435828 1956-12-20 2435848 1957-01-09 -20 AAVSO
-18 9.1 2436133 1957-10-21 2436148 1957-11-05 -15 SVO
-17 9.2 2436436 1958-08-20 2436449 1958-09-02 -13 SVO
-16 9.6 2436745 1959-06-25 2436749 1959-06-29 -4 SVO
-15   2437040 1960-04-15 2437050 1960-04-25 -10 AAVSO
-14 9.4 2437344 1961-02-13 2437350 1961-02-19 -6 AAVSO
-13 9.5 2437642 1961-12-08 2437650 1961-12-16 -8 SVO
-12 9.2 2437938 1962-09-30 2437951 1962-10-13 -13 SVO
-11 9.2 2438248 1963-08-06 2438251 1963-08-09 -3 AAVSO
-10 9.2 2438544 1964-05-28 2438551 1964-06-04 -7 AAVSO
-9 9.2 2438848 1965-03-28 2438852 1965-04-01 -4 AAVSO
-8 9.2 2439148 1966-01-22 2439152 1966-01-26 -4 AAVSO
-7 9.4 2439444 1966-11-14 2439452 1966-11-22 -8 SVO
-6 9.2 2439736 1967-09-02 2439753 1967-09-19 -17 SVO
-5 9.0 2440039 1968-07-01 2440053 1968-07-15 -14 AAVSO
-4 9.2 2440338 1969-04-26 2440354 1969-05-12 -16 AAVSO
-3 9.5 2440617 1970-01-30 2440654 1970-03-08 -37 SVO
-2 9.1 2440930 1970-12-09 2440954 1971-01-02 -24 SVO
-1 8.7 2441221 1971-09-26 2441255 1971-10-30 -34 SVO
0 10.4 2441527 1972-07-28 2441555 1972-08-25 -28 SVO
1   2441819 1973-05-16 2441855 1973-06-21 -36 AAVSO
2 9.4 2442120 1974-03-13 2442156 1974-04-18 -36 SVO
3 9.6 2442414 1975-01-01 2442456 1975-02-12 -42 SVO
4 9.1 2442718 1975-11-01 2442756 1975-12-09 -38 SVO
5 8.6 2443011 1976-08-20 2443057 1976-10-05 -46 SVO
6 9.9 2443322 1977-06-27 2443357 1977-08-01 -35 SVO
7 11.4 2443619 1978-04-20 2443657 1978-05-28 -38 AAVSO
8 9.8 2443916 1979-02-11 2443958 1979-03-25 -42 AAVSO
9 9.3 2444225 1979-12-17 2444258 1980-01-19 -33 SVO
10 9.0 2444526 1980-10-13 2444559 1980-11-15 -33 SVO
11 9.0 2444834 1981-08-17 2444859 1981-09-11 -25 SVO
12 9.7 2445131 1982-06-10 2445159 1982-07-08 -28 AAVSO
13 9.5 2445440 1983-04-15 2445460 1983-05-05 -20 AAVSO
14 9.0 2445752 1984-02-21 2445760 1984-02-29 -8 SVO
15 9.4 2446062 1984-12-27 2446060 1984-12-25 2 SVO
16 9.7 2446375 1985-11-05 2446361 1985-10-22 14 SVO
17 8.8 2446670 1986-08-27 2446661 1986-08-18 9 SVO
18 9.5 2446975 1987-06-28 2446961 1987-06-14 14 SVO
19 9.5 2447277 1988-04-25 2447262 1988-04-10 15 SVO
20 9.3 2447582 1989-02-24 2447562 1989-02-04 20 SVO
21 9.3 2447889 1989-12-28 2447863 1989-12-02 26 SVO
22 9.2 2448192 1990-10-27 2448163 1990-09-28 29 SVO
23 9.3 2448491 1991-08-22 2448463 1991-07-25 28 SVO
24 8.9 2448792 1992-06-18 2448764 1992-05-21 28 SVO
25 9.6 2449085 1993-04-07 2449064 1993-03-17 21 SVO
26 9.0 2449380 1994-01-27 2449364 1994-01-11 16 SVO
27 10.3 2449699 1994-12-12 2449665 1994-11-08 34 SVO
28 9.5 2450001 1995-10-10 2449965 1995-09-04 36 SVO
29 10.0 2450293 1996-07-28 2450265 1996-06-30 28 SVO
30 8.9 2450594 1997-05-25 2450566 1997-04-27 28 SVO
31 9.6 2450891 1998-03-18 2450866 1998-02-21 25 SVO
32 9.2 2451191 1999-01-12 2451166 1998-12-18 25 SVO
33 9.6 2451489 1999-11-06 2451467 1999-10-15 22 SVO
34 9.3 2451792 2000-09-04 2451767 2000-08-10 25 SVO
35 9.1 2452094 2001-07-03 2452068 2001-06-07 26 SVO
36   2452396 2002-05-01 2452368 2002-04-03 28 AAVSO
37 9.0 2452685 2003-02-14 2452668 2003-01-28 17 SVO
38 9.7 2452985 2003-12-11 2452969 2003-11-25 16 SVO
39 9.1 2453283 2004-10-04 2453269 2004-09-20 14 SVO
40 8.8 2453578 2005-07-26 2453569 2005-07-17 9 SVO
41   2453883 2006-05-27 2453870 2006-05-14 13 AAVSO
42 9.9 2454188 2007-03-28 2454170 2007-03-10 18 SVO
43 10.3 2454490 2008-01-24 2454470 2008-01-04 20 SVO
44 9.1 2454792 2008-11-21 2454771 2008-10-31 21 SVO
45 10.1 2455091 2009-09-16 2455071 2009-08-27 20 SVO
46 9.0 2455390 2010-07-12 2455372 2010-06-24 18 SVO
47 9.2 2455685 2011-05-03 2455672 2011-04-20 13 SVO
48 9.1 2455993 2012-03-06 2455972 2012-02-14 21 SVO
49 9.0 2456290 2012-12-28 2456273 2012-12-11 17 SVO
50 9.3 2456590 2013-10-24 2456573 2013-10-07 17 SVO
51 9.4 2456893 2014-08-23 2456873 2014-08-03 20 SVO
52 9.5 2457193 2015-06-19 2457174 2015-05-31 19 SVO
53   2457494 2016-04-15 2457474 2016-03-26 20 AAVSO
54 9.1 2457788 2017-02-03 2457774 2017-01-20 14 SVO
55 8.9 2458082 2017-11-24 2458075 2017-11-17 7 AAVSO
56 10.1 2458396 2018-10-04 2458375 2018-09-13 21 SVO
57 9.1 2458693 2019-07-28 2458675 2019-07-10 18 SVO
58 9.0 2458990 2020-05-20 2458976 2020-05-06 14 SVO
59   2459290 2021-03-16 2459276 2021-03-02 14 SVO
60 9.2 2459584 2022-01-04 2459577 2021-12-28 7 SVO
61 9.2 2459888 2022-11-04 2459877 2022-10-24 11 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.