Maxima for TW Cyg
Period: 342.50, Epoch: 2439199.6
AAVSO offset: 0

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-71   2414935 1899-10-07 2414882 1899-08-15 53 AnHar, 1909, vol 55, p 95
-69   2415629 1901-09-01 2415567 1901-07-01 62 AnHar, 1909, vol 55, p 95
-68   2415977 1902-08-15 2415910 1902-06-09 67 AnHar, 1909, vol 55, p 95
-67   2416330 1903-08-03 2416252 1903-05-17 78 AnHar, 1909, vol 55, p 95
-66   2416660 1904-06-28 2416595 1904-04-24 65 AnHar, 1909, vol 55, p 95
-65   2416992 1905-05-26 2416937 1905-04-01 55 AnHar, 1909, vol 55, p 95
-64   2417327 1906-04-26 2417280 1906-03-10 47 AnHar, 1909, vol 55, p 95
-61   2418321 1909-01-14 2418307 1908-12-31 14 AAVSO
-60   2418671 1909-12-30 2418650 1909-12-09 21 AAVSO
-59   2419020 1910-12-14 2418992 1910-11-16 28 AAVSO
-58   2419344 1911-11-03 2419335 1911-10-25 9 GuL, 1920, 1.2
-57   2419710 1912-11-03 2419677 1912-10-01 33 GuL, 1920, 1.2
-56 10.1 2420040 1913-09-29 2420020 1913-09-09 20 SVO
-55 10.5 2420363 1914-08-18 2420362 1914-08-17 1 AAVSO
-54 9.8 2420710 1915-07-31 2420705 1915-07-26 5 AAVSO
-53 10.0 2421034 1916-06-19 2421047 1916-07-02 -13 AAVSO
-52 10.0 2421386 1917-06-06 2421390 1917-06-10 -4 AAVSO
-51   2421711 1918-04-27 2421732 1918-05-18 -21 AAVSO
-50   2422046 1919-03-28 2422075 1919-04-26 -29 AAVSO
-49   2422390 1920-03-06 2422417 1920-04-02 -27 AAVSO
-48 10.7 2422736 1921-02-15 2422760 1921-03-11 -24 AAVSO
-47   2423096 1922-02-10 2423102 1922-02-16 -6 AAVSO
-46 10.1 2423433 1923-01-13 2423445 1923-01-25 -12 SVO
-45 9.5 2423772 1923-12-18 2423787 1924-01-02 -15 SVO
-44 10.1 2424123 1924-12-03 2424130 1924-12-10 -7 SVO
-43 9.4 2424462 1925-11-07 2424472 1925-11-17 -10 AAVSO
-42 10.0 2424804 1926-10-15 2424815 1926-10-26 -11 AAVSO
-41 10.0 2425155 1927-10-01 2425157 1927-10-03 -2 AAVSO
-40 10.0 2425491 1928-09-01 2425500 1928-09-10 -9 AAVSO
-39 10.7 2425842 1929-08-18 2425842 1929-08-18 0 SVO
-38 9.8 2426180 1930-07-22 2426185 1930-07-27 -5 SVO
-37 10.2 2426527 1931-07-04 2426527 1931-07-04 0 SVO
-36 9.9 2426864 1932-06-05 2426870 1932-06-11 -6 SVO
-35 10.2 2427206 1933-05-13 2427212 1933-05-19 -6 SVO
-34 9.4 2427572 1934-05-14 2427555 1934-04-27 17 AAVSO
-33 8.9 2427907 1935-04-14 2427897 1935-04-04 10 AAVSO
-32 10.0 2428259 1936-03-31 2428240 1936-03-12 19 AAVSO
-31   2428601 1937-03-08 2428582 1937-02-17 19 AAVSO
-30   2428950 1938-02-20 2428925 1938-01-26 25 AAVSO
-29   2429297 1939-02-02 2429267 1939-01-03 30 AAVSO
-28   2429648 1940-01-19 2429610 1939-12-12 38 AAVSO
-27 10.4 2429983 1940-12-19 2429952 1940-11-18 31 AAVSO
-26 10.1 2430316 1941-11-17 2430295 1941-10-27 21 SVO
-25 9.7 2430673 1942-11-09 2430637 1942-10-04 36 SVO
-24 10.2 2431019 1943-10-21 2430980 1943-09-12 39 SVO
-23 10.2 2431363 1944-09-29 2431322 1944-08-19 41 SVO
-22 10.4 2431703 1945-09-04 2431665 1945-07-28 38 SVO
-21 9.9 2432037 1946-08-04 2432007 1946-07-05 30 SVO
-20 10.1 2432386 1947-07-19 2432350 1947-06-13 36 AAVSO
-19 10.2 2432716 1948-06-13 2432692 1948-05-20 24 AAVSO
-18 9.7 2433061 1949-05-24 2433035 1949-04-28 26 AAVSO
-17 9.9 2433407 1950-05-05 2433377 1950-04-05 30 AAVSO
-16   2433743 1951-04-06 2433720 1951-03-14 23 AAVSO
-15   2434088 1952-03-16 2434062 1952-02-19 26 AAVSO
-14 11.1 2434420 1953-02-11 2434405 1953-01-27 15 AAVSO
-13 10.4 2434754 1954-01-11 2434747 1954-01-04 7 AAVSO
-12 11.0 2435093 1954-12-16 2435090 1954-12-13 3 AAVSO
-11 10.0 2435432 1955-11-20 2435432 1955-11-20 0 SVO
-10 10.1 2435758 1956-10-11 2435775 1956-10-28 -17 SVO
-9 10.4 2436104 1957-09-22 2436117 1957-10-05 -13 SVO
-8 10.1 2436442 1958-08-26 2436460 1958-09-13 -18 SVO
-7 10.3 2436787 1959-08-06 2436802 1959-08-21 -15 SVO
-6 10.3 2437113 1960-06-27 2437145 1960-07-29 -32 SVO
-5 10.3 2437450 1961-05-30 2437487 1961-07-06 -37 AAVSO
-4 10.0 2437788 1962-05-03 2437830 1962-06-14 -42 AAVSO
-3 11.0 2438129 1963-04-09 2438172 1963-05-22 -43 AAVSO
-2 10.6 2438461 1964-03-06 2438515 1964-04-29 -54 SVO
-1   2438801 1965-02-09 2438857 1965-04-06 -56 AAVSO
0 11.2 2439145 1966-01-19 2439200 1966-03-15 -55 AAVSO
1 9.7 2439489 1966-12-29 2439542 1967-02-20 -53 AAVSO
2 10.0 2439829 1967-12-04 2439885 1968-01-29 -56 AAVSO
3 10.1 2440175 1968-11-14 2440227 1969-01-05 -52 AAVSO
4 10.0 2440495 1969-09-30 2440570 1969-12-14 -75 SVO
5 10.0 2440832 1970-09-02 2440912 1970-11-21 -80 SVO
6 10.1 2441179 1971-08-15 2441255 1971-10-30 -76 SVO
7 10.1 2441518 1972-07-19 2441597 1972-10-06 -79 SVO
8 10.3 2441865 1973-07-01 2441940 1973-09-14 -75 SVO
9 11.0 2442205 1974-06-06 2442282 1974-08-22 -77 AAVSO
10 11.0 2442552 1975-05-19 2442625 1975-07-31 -73 AAVSO
11 11.0 2442893 1976-04-24 2442967 1976-07-07 -74 AAVSO
12 11.5 2443232 1977-03-29 2443310 1977-06-15 -78 AAVSO
13 12.1 2443572 1978-03-04 2443652 1978-05-23 -80 AAVSO
14 12.2 2443916 1979-02-11 2443995 1979-05-01 -79 AAVSO
15 10.4 2444256 1980-01-17 2444337 1980-04-07 -81 AAVSO
16 11.1 2444598 1980-12-24 2444680 1981-03-16 -82 AAVSO
17 10.3 2444941 1981-12-02 2445022 1982-02-21 -81 SVO
18 10.5 2445284 1982-11-10 2445365 1983-01-30 -81 SVO
19 10.1 2445634 1983-10-26 2445707 1984-01-07 -73 SVO
20 9.6 2445968 1984-09-24 2446050 1984-12-15 -82 SVO
21 10.3 2446325 1985-09-16 2446392 1985-11-22 -67 SVO
22 10.2 2446668 1986-08-25 2446735 1986-10-31 -67 SVO
23 10.2 2447018 1987-08-10 2447077 1987-10-08 -59 SVO
24 10.4 2447379 1988-08-05 2447420 1988-09-15 -41 SVO
25 10.7 2447728 1989-07-20 2447762 1989-08-23 -34 SVO
26 10.2 2448070 1990-06-27 2448105 1990-08-01 -35 SVO
27 10.2 2448417 1991-06-09 2448447 1991-07-09 -30 SVO
28 10.4 2448765 1992-05-22 2448790 1992-06-16 -25 SVO
29 10.4 2449117 1993-05-09 2449132 1993-05-24 -15 SVO
30 10.0 2449460 1994-04-17 2449475 1994-05-02 -15 SVO
31 10.2 2449809 1995-04-01 2449817 1995-04-09 -8 SVO
32 10.2 2450157 1996-03-14 2450160 1996-03-17 -3 SVO
33 10.0 2450507 1997-02-27 2450502 1997-02-22 5 SVO
34 10.6 2450860 1998-02-15 2450845 1998-01-31 15 SVO
35 10.1 2451200 1999-01-21 2451187 1999-01-08 13 SVO
36 10.5 2451548 2000-01-04 2451530 1999-12-17 18 SVO
37 10.4 2451900 2000-12-21 2451872 2000-11-23 28 SVO
38 10.4 2452251 2001-12-07 2452215 2001-11-01 36 SVO
39 10.8 2452610 2002-12-01 2452557 2002-10-09 53 SVO
40 10.2 2452949 2003-11-05 2452900 2003-09-17 49 SVO
41 9.9 2453285 2004-10-06 2453242 2004-08-24 43 SVO
42 10.6 2453630 2005-09-16 2453585 2005-08-02 45 SVO
43 10.0 2453977 2006-08-29 2453927 2006-07-10 50 SVO
44 10.6 2454323 2007-08-10 2454270 2007-06-18 53 SVO
45 9.9 2454662 2008-07-14 2454612 2008-05-25 50 SVO
46 10.6 2455008 2009-06-25 2454955 2009-05-03 53 SVO
47 10.0 2455348 2010-05-31 2455297 2010-04-10 51 SVO
48 10.6 2455696 2011-05-14 2455640 2011-03-19 56 SVO
49 10.2 2456035 2012-04-17 2455982 2012-02-24 53 SVO
50 10.1 2456372 2013-03-20 2456325 2013-02-01 47 SVO
51 9.8 2456710 2014-02-21 2456667 2014-01-09 43 SVO
52 10.1 2457053 2015-01-30 2457010 2014-12-18 43 SVO
53 10.3 2457399 2016-01-11 2457352 2015-11-25 47 SVO
54 10.1 2457746 2016-12-23 2457695 2016-11-02 51 SVO
55 10.2 2458092 2017-12-04 2458037 2017-10-10 55 SVO
56 10.2 2458445 2018-11-22 2458380 2018-09-18 65 SVO
57 10.4 2458790 2019-11-02 2458722 2019-08-26 68 SVO
58 9.8 2459137 2020-10-14 2459065 2020-08-03 72 SVO
59 10.1 2459481 2021-09-23 2459407 2021-07-11 74 SVO
60 10.2 2459831 2022-09-08 2459749 2022-06-18 82 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.