Maxima for TW Cyg
Period: 342.56, Epoch: 2439201.2
AAVSO offset: 0

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-71   2414935 1899-10-07 2414879 1899-08-12 56 AnHar, 1909, vol 55, p 95
-69   2415629 1901-09-01 2415565 1901-06-29 64 AnHar, 1909, vol 55, p 95
-68   2415977 1902-08-15 2415907 1902-06-06 70 AnHar, 1909, vol 55, p 95
-67   2416330 1903-08-03 2416250 1903-05-15 80 AnHar, 1909, vol 55, p 95
-66   2416660 1904-06-28 2416592 1904-04-21 68 AnHar, 1909, vol 55, p 95
-65   2416992 1905-05-26 2416935 1905-03-30 57 AnHar, 1909, vol 55, p 95
-64   2417327 1906-04-26 2417277 1906-03-07 50 AnHar, 1909, vol 55, p 95
-61   2418321 1909-01-14 2418305 1908-12-29 16 AAVSO
-60   2418671 1909-12-30 2418648 1909-12-07 23 AAVSO
-59   2419020 1910-12-14 2418990 1910-11-14 30 AAVSO
-58   2419344 1911-11-03 2419333 1911-10-23 11 GuL, 1920, 1.2
-57   2419710 1912-11-03 2419675 1912-09-29 35 GuL, 1920, 1.2
-56 10.1 2420040 1913-09-29 2420018 1913-09-07 22 SVO
-55 10.5 2420363 1914-08-18 2420360 1914-08-15 3 AAVSO
-54 9.8 2420710 1915-07-31 2420703 1915-07-24 7 AAVSO
-53 10.0 2421034 1916-06-19 2421046 1916-07-01 -12 AAVSO
-52 10.0 2421386 1917-06-06 2421388 1917-06-08 -2 AAVSO
-51   2421711 1918-04-27 2421731 1918-05-17 -20 AAVSO
-50   2422046 1919-03-28 2422073 1919-04-24 -27 AAVSO
-49   2422390 1920-03-06 2422416 1920-04-01 -26 AAVSO
-48 10.7 2422736 1921-02-15 2422758 1921-03-09 -22 AAVSO
-47   2423096 1922-02-10 2423101 1922-02-15 -5 AAVSO
-46 10.1 2423433 1923-01-13 2423443 1923-01-23 -10 SVO
-45 9.5 2423772 1923-12-18 2423786 1924-01-01 -14 SVO
-44 10.1 2424123 1924-12-03 2424129 1924-12-09 -6 SVO
-43 9.4 2424462 1925-11-07 2424471 1925-11-16 -9 AAVSO
-42 10.0 2424804 1926-10-15 2424814 1926-10-25 -10 AAVSO
-41 10.0 2425155 1927-10-01 2425156 1927-10-02 -1 AAVSO
-40 10.0 2425491 1928-09-01 2425499 1928-09-09 -8 AAVSO
-39 10.7 2425842 1929-08-18 2425841 1929-08-17 1 SVO
-38 9.8 2426180 1930-07-22 2426184 1930-07-26 -4 SVO
-37 10.2 2426527 1931-07-04 2426526 1931-07-03 1 SVO
-36 9.9 2426864 1932-06-05 2426869 1932-06-10 -5 SVO
-35 10.2 2427206 1933-05-13 2427212 1933-05-19 -6 SVO
-34 9.4 2427572 1934-05-14 2427554 1934-04-26 18 AAVSO
-33 8.9 2427907 1935-04-14 2427897 1935-04-04 10 AAVSO
-32 10.0 2428259 1936-03-31 2428239 1936-03-11 20 AAVSO
-31   2428601 1937-03-08 2428582 1937-02-17 19 AAVSO
-30   2428950 1938-02-20 2428924 1938-01-25 26 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 2432693 1948-05-21 23 AAVSO
-18 9.7 2433061 1949-05-24 2433035 1949-04-28 26 AAVSO
-17 9.9 2433407 1950-05-05 2433378 1950-04-06 29 AAVSO
-16   2433743 1951-04-06 2433720 1951-03-14 23 AAVSO
-15   2434088 1952-03-16 2434063 1952-02-20 25 AAVSO
-14 11.1 2434420 1953-02-11 2434405 1953-01-27 15 AAVSO
-13 10.4 2434754 1954-01-11 2434748 1954-01-05 6 AAVSO
-12 11.0 2435093 1954-12-16 2435090 1954-12-13 3 AAVSO
-11 10.0 2435432 1955-11-20 2435433 1955-11-21 -1 SVO
-10 10.1 2435758 1956-10-11 2435776 1956-10-29 -18 SVO
-9 10.4 2436104 1957-09-22 2436118 1957-10-06 -14 SVO
-8 10.1 2436442 1958-08-26 2436461 1958-09-14 -19 SVO
-7 10.3 2436787 1959-08-06 2436803 1959-08-22 -16 SVO
-6 10.3 2437113 1960-06-27 2437146 1960-07-30 -33 SVO
-5 10.3 2437450 1961-05-30 2437488 1961-07-07 -38 AAVSO
-4 10.0 2437788 1962-05-03 2437831 1962-06-15 -43 AAVSO
-3 11.0 2438129 1963-04-09 2438173 1963-05-23 -44 AAVSO
-2 10.6 2438461 1964-03-06 2438516 1964-04-30 -55 SVO
-1   2438801 1965-02-09 2438859 1965-04-08 -58 AAVSO
0 11.2 2439145 1966-01-19 2439201 1966-03-16 -56 AAVSO
1 9.7 2439489 1966-12-29 2439544 1967-02-22 -55 AAVSO
2 10.0 2439829 1967-12-04 2439886 1968-01-30 -57 AAVSO
3 10.1 2440175 1968-11-14 2440229 1969-01-07 -54 AAVSO
4 10.0 2440495 1969-09-30 2440571 1969-12-15 -76 SVO
5 10.0 2440832 1970-09-02 2440914 1970-11-23 -82 SVO
6 10.1 2441179 1971-08-15 2441257 1971-11-01 -78 SVO
7 10.1 2441518 1972-07-19 2441599 1972-10-08 -81 SVO
8 10.3 2441865 1973-07-01 2441942 1973-09-16 -77 SVO
9 11.0 2442205 1974-06-06 2442284 1974-08-24 -79 AAVSO
10 11.0 2442552 1975-05-19 2442627 1975-08-02 -75 AAVSO
11 11.0 2442893 1976-04-24 2442969 1976-07-09 -76 AAVSO
12 11.5 2443232 1977-03-29 2443312 1977-06-17 -80 AAVSO
13 12.1 2443572 1978-03-04 2443654 1978-05-25 -82 AAVSO
14 12.2 2443916 1979-02-11 2443997 1979-05-03 -81 AAVSO
15 10.4 2444256 1980-01-17 2444340 1980-04-10 -84 AAVSO
16 11.1 2444598 1980-12-24 2444682 1981-03-18 -84 AAVSO
17 10.3 2444941 1981-12-02 2445025 1982-02-24 -84 SVO
18 10.5 2445284 1982-11-10 2445367 1983-02-01 -83 SVO
19 10.1 2445634 1983-10-26 2445710 1984-01-10 -76 SVO
20 9.6 2445968 1984-09-24 2446052 1984-12-17 -84 SVO
21 10.3 2446325 1985-09-16 2446395 1985-11-25 -70 SVO
22 10.2 2446668 1986-08-25 2446737 1986-11-02 -69 SVO
23 10.2 2447018 1987-08-10 2447080 1987-10-11 -62 SVO
24 10.4 2447379 1988-08-05 2447423 1988-09-18 -44 SVO
25 10.7 2447728 1989-07-20 2447765 1989-08-26 -37 SVO
26 10.2 2448070 1990-06-27 2448108 1990-08-04 -38 SVO
27 10.2 2448417 1991-06-09 2448450 1991-07-12 -33 SVO
28 10.4 2448765 1992-05-22 2448793 1992-06-19 -28 SVO
29 10.4 2449117 1993-05-09 2449135 1993-05-27 -18 SVO
30 10.0 2449460 1994-04-17 2449478 1994-05-05 -18 SVO
31 10.2 2449809 1995-04-01 2449821 1995-04-13 -12 SVO
32 10.2 2450157 1996-03-14 2450163 1996-03-20 -6 SVO
33 10.0 2450507 1997-02-27 2450506 1997-02-26 1 SVO
34 10.6 2450860 1998-02-15 2450848 1998-02-03 12 SVO
35 10.1 2451200 1999-01-21 2451191 1999-01-12 9 SVO
36 10.5 2451548 2000-01-04 2451533 1999-12-20 15 SVO
37 10.4 2451900 2000-12-21 2451876 2000-11-27 24 SVO
38 10.4 2452251 2001-12-07 2452218 2001-11-04 33 SVO
39 10.8 2452610 2002-12-01 2452561 2002-10-13 49 SVO
40 10.2 2452949 2003-11-05 2452904 2003-09-21 45 SVO
41 9.9 2453285 2004-10-06 2453246 2004-08-28 39 SVO
42 10.6 2453630 2005-09-16 2453589 2005-08-06 41 SVO
43 10.0 2453977 2006-08-29 2453931 2006-07-14 46 SVO
44 10.6 2454323 2007-08-10 2454274 2007-06-22 49 SVO
45 9.9 2454662 2008-07-14 2454616 2008-05-29 46 SVO
46 10.6 2455008 2009-06-25 2454959 2009-05-07 49 SVO
47 10.0 2455348 2010-05-31 2455301 2010-04-14 47 SVO
48 10.6 2455696 2011-05-14 2455644 2011-03-23 52 SVO
49 10.2 2456035 2012-04-17 2455987 2012-02-29 48 SVO
50 10.1 2456372 2013-03-20 2456329 2013-02-05 43 SVO
51 9.8 2456710 2014-02-21 2456672 2014-01-14 38 SVO
52 10.1 2457053 2015-01-30 2457014 2014-12-22 39 SVO
53 10.3 2457399 2016-01-11 2457357 2015-11-30 42 SVO
54 10.1 2457746 2016-12-23 2457699 2016-11-06 47 SVO
55 10.2 2458092 2017-12-04 2458042 2017-10-15 50 SVO
56 10.2 2458445 2018-11-22 2458385 2018-09-23 60 SVO
57 10.4 2458790 2019-11-02 2458727 2019-08-31 63 SVO
58 9.8 2459137 2020-10-14 2459070 2020-08-08 67 SVO
59 10.1 2459481 2021-09-23 2459412 2021-07-16 69 SVO
60 10.2 2459831 2022-09-08 2459755 2022-06-24 76 SVO
61 10.0 2460181 2023-08-24 2460097 2023-06-01 84 SVO
62 10.4 2460525 2024-08-02 2460440 2024-05-09 85 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.