Maxima for RY Cep
Period: 149.06, Epoch: 2444533
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-221   2411585 1890-08-05 2411591 1890-08-11 -6 SVO
-213   2412785 1893-11-17 2412783 1893-11-15 2 SVO
-211   2413080 1894-09-08 2413081 1894-09-09 -1 SVO
-206   2413841 1896-10-08 2413827 1896-09-24 14 AN, 1913, vol 193, p 319
-205   2413970 1897-02-14 2413976 1897-02-20 -6 SVO
-202   2414423 1898-05-13 2414423 1898-05-13 0 AN, 1913, vol 193, p 319
-200   2414715 1899-03-01 2414721 1899-03-07 -6 SVO
-199   2414875 1899-08-08 2414870 1899-08-03 5 SVO
-198   2415025 1900-01-05 2415019 1899-12-30 6 SVO
-197   2415143 1900-05-03 2415168 1900-05-28 -25 AN, 1913, vol 193, p 319
-195   2415460 1901-03-16 2415466 1901-03-22 -6 SVO
-194   2415613 1901-08-16 2415615 1901-08-18 -2 AN, 1913, vol 193, p 319
-193   2415768 1902-01-18 2415764 1902-01-14 4 SVO
-192   2415915 1902-06-14 2415913 1902-06-12 2 SVO
-191   2416078 1902-11-24 2416063 1902-11-09 15 SVO
-189   2416365 1903-09-07 2416361 1903-09-03 4 SVO
-188   2416520 1904-02-09 2416510 1904-01-30 10 SVO
-187   2416663 1904-07-01 2416659 1904-06-27 4 SVO
-186   2416809 1904-11-24 2416808 1904-11-23 1 SVO
-184   2417105 1905-09-16 2417106 1905-09-17 -1 SVO
-183   2417245 1906-02-03 2417255 1906-02-13 -10 SVO
-181   2417545 1906-11-30 2417553 1906-12-08 -8 SVO
-179   2417839 1907-09-20 2417851 1907-10-02 -12 SVO
-178   2417985 1908-02-13 2418000 1908-02-28 -15 SVO
-176   2418287 1908-12-11 2418298 1908-12-22 -11 SVO
-175   2418424 1909-04-27 2418448 1909-05-21 -24 AN, 1913, vol 193, p 319
-174   2418580 1909-09-30 2418597 1909-10-17 -17 AN, 1913, vol 193, p 319
-173   2418720 1910-02-17 2418746 1910-03-15 -26 AN, 1913, vol 193, p 319
-172   2418865 1910-07-12 2418895 1910-08-11 -30 SVO
-171   2419022 1910-12-16 2419044 1911-01-07 -22 SVO
-169   2419320 1911-10-10 2419342 1911-11-01 -22 SVO
-166   2419780 1913-01-12 2419789 1913-01-21 -9 SVO
-164   2420070 1913-10-29 2420087 1913-11-15 -17 SVO
-163   2420220 1914-03-28 2420236 1914-04-13 -16 SVO
-161   2420517 1915-01-19 2420534 1915-02-05 -17 SVO
-159   2420813 1915-11-11 2420832 1915-11-30 -19 SVO
-158   2420955 1916-04-01 2420982 1916-04-28 -27 SVO
-157   2421102 1916-08-26 2421131 1916-09-24 -29 SVO
-156   2421253 1917-01-24 2421280 1917-02-20 -27 SVO
-154   2421561 1917-11-28 2421578 1917-12-15 -17 SVO
-153   2421700 1918-04-16 2421727 1918-05-13 -27 SVO
-152   2421835 1918-08-29 2421876 1918-10-09 -41 SVO
-151   2421990 1919-01-31 2422025 1919-03-07 -35 SVO
-150   2422150 1919-07-10 2422174 1919-08-03 -24 SVO
-149   2422296 1919-12-03 2422323 1919-12-30 -27 SVO
-147   2422601 1920-10-03 2422621 1920-10-23 -20 SVO
-146   2422741 1921-02-20 2422770 1921-03-21 -29 SVO
-145   2422890 1921-07-19 2422919 1921-08-17 -29 SVO
-144   2423040 1921-12-16 2423068 1922-01-13 -28 SVO
-142   2423340 1922-10-12 2423366 1922-11-07 -26 SVO
-141   2423490 1923-03-11 2423516 1923-04-06 -26 SVO
-140   2423645 1923-08-13 2423665 1923-09-02 -20 SVO
-139   2423785 1923-12-31 2423814 1924-01-29 -29 SVO
-137   2424087 1924-10-28 2424112 1924-11-22 -25 SVO
-135   2424381 1925-08-18 2424410 1925-09-16 -29 SVO
-134   2424520 1926-01-04 2424559 1926-02-12 -39 SVO
-132   2424825 1926-11-05 2424857 1926-12-07 -32 SVO
-130   2425112 1927-08-19 2425155 1927-10-01 -43 SVO
-127   2425570 1928-11-19 2425602 1928-12-21 -32 SVO
-126   2425708 1929-04-06 2425751 1929-05-19 -43 AN, 1936, vol 259, p 101
-125   2425857 1929-09-02 2425901 1929-10-16 -44 SVO
-124   2426005 1930-01-28 2426050 1930-03-14 -45 SVO
-123   2426155 1930-06-27 2426199 1930-08-10 -44 SVO
-122   2426306 1930-11-25 2426348 1931-01-06 -42 SVO
-120   2426594 1931-09-09 2426646 1931-10-31 -52 SVO
-119   2426752 1932-02-14 2426795 1932-03-28 -43 SVO
-118   2426904 1932-07-15 2426944 1932-08-24 -40 SVO
-117   2427049 1932-12-07 2427093 1933-01-20 -44 AN, 1936, vol 259, p 101
-115   2427349 1933-10-03 2427391 1933-11-14 -42 AN, 1936, vol 259, p 101
-113   2427656 1934-08-06 2427689 1934-09-08 -33 SVO
-112   2427821 1935-01-18 2427838 1935-02-04 -17 SVO
-111   2427964 1935-06-10 2427987 1935-07-03 -23 SVO
-110   2428112 1935-11-05 2428136 1935-11-29 -24 SVO
-108   2428411 1936-08-30 2428435 1936-09-23 -24 SVO
-107   2428568 1937-02-03 2428584 1937-02-19 -16 SVO
-106   2428700 1937-06-15 2428733 1937-07-18 -33 SVO
-105   2428855 1937-11-17 2428882 1937-12-14 -27 SVO
-103   2429151 1938-09-09 2429180 1938-10-08 -29 SVO
-102   2429309 1939-02-14 2429329 1939-03-06 -20 SVO
-101   2429456 1939-07-11 2429478 1939-08-02 -22 SVO
-100   2429603 1939-12-05 2429627 1939-12-29 -24 SVO
-99   2429757 1940-05-07 2429776 1940-05-26 -19 SVO
-98   2429909 1940-10-06 2429925 1940-10-22 -16 SVO
-97   2430050 1941-02-24 2430074 1941-03-20 -24 SVO
-96   2430200 1941-07-24 2430223 1941-08-16 -23 SVO
-95   2430357 1941-12-28 2430372 1942-01-12 -15 SVO
-94   2430505 1942-05-25 2430521 1942-06-10 -16 SVO
-93   2430656 1942-10-23 2430670 1942-11-06 -14 SVO
-92   2430799 1943-03-15 2430819 1943-04-04 -20 SVO
-91   2430946 1943-08-09 2430969 1943-09-01 -23 SVO
-90   2431085 1943-12-26 2431118 1944-01-28 -33 SVO
-89   2431240 1944-05-29 2431267 1944-06-25 -27 SVO
-88   2431383 1944-10-19 2431416 1944-11-21 -33 SVO
-87   2431535 1945-03-20 2431565 1945-04-19 -30 SVO
-86   2431688 1945-08-20 2431714 1945-09-15 -26 SVO
-85   2431825 1946-01-04 2431863 1946-02-11 -38 SVO
-84   2431983 1946-06-11 2432012 1946-07-10 -29 SVO
-83   2432137 1946-11-12 2432161 1946-12-06 -24 SVO
-82   2432285 1947-04-09 2432310 1947-05-04 -25 PCopO, 1955, vol 167, p 1
-81   2432432 1947-09-03 2432459 1947-09-30 -27 PCopO, 1955, vol 167, p 1
-80   2432600 1948-02-18 2432608 1948-02-26 -8 PCopO, 1955, vol 167, p 1
-79   2432730 1948-06-27 2432757 1948-07-24 -27 SVO
-78   2432890 1948-12-04 2432906 1948-12-20 -16 PCopO, 1955, vol 167, p 1
-77   2433030 1949-04-23 2433055 1949-05-18 -25 SVO
-76   2433186 1949-09-26 2433204 1949-10-14 -18 SVO
-75   2433341 1950-02-28 2433354 1950-03-13 -13 PCopO, 1955, vol 167, p 1
-74   2433491 1950-07-28 2433503 1950-08-09 -12 SVO
-73   2433632 1950-12-16 2433652 1951-01-05 -20 PCopO, 1955, vol 167, p 1
-72   2433782 1951-05-15 2433801 1951-06-03 -19 PCopO, 1955, vol 167, p 1
-71   2433943 1951-10-23 2433950 1951-10-30 -7 PCopO, 1955, vol 167, p 1
-70   2434082 1952-03-10 2434099 1952-03-27 -17 PCopO, 1955, vol 167, p 1
-69   2434240 1952-08-15 2434248 1952-08-23 -8 SVO
-68   2434389 1953-01-11 2434397 1953-01-19 -8 PCopO, 1955, vol 167, p 1
-67   2434528 1953-05-30 2434546 1953-06-17 -18 PCopO, 1955, vol 167, p 1
-66   2434680 1953-10-29 2434695 1953-11-13 -15 PCopO, 1955, vol 167, p 1
-19   2441685 1973-01-02 2441701 1973-01-18 -16 SVO
-17   2441990 1973-11-03 2441999 1973-11-12 -9 SVO
-16   2442140 1974-04-02 2442148 1974-04-10 -8 SVO
-15   2442290 1974-08-30 2442297 1974-09-06 -7 SVO
-14   2442439 1975-01-26 2442446 1975-02-02 -7 SVO
-13   2442595 1975-07-01 2442595 1975-07-01 0 SVO
-12   2442751 1975-12-04 2442744 1975-11-27 7 SVO
-10   2443050 1976-09-28 2443042 1976-09-20 8 SVO
-9   2443195 1977-02-20 2443191 1977-02-16 4 SVO
-8   2443350 1977-07-25 2443341 1977-07-16 9 SVO
-7   2443485 1977-12-07 2443490 1977-12-12 -5 SVO
-6   2443640 1978-05-11 2443639 1978-05-10 1 SVO
-5   2443800 1978-10-18 2443788 1978-10-06 12 SVO
-4   2443930 1979-02-25 2443937 1979-03-04 -7 SVO
-3   2444080 1979-07-25 2444086 1979-07-31 -6 SVO
-2   2444235 1979-12-27 2444235 1979-12-27 0 SVO
-1   2444385 1980-05-25 2444384 1980-05-24 1 SVO
0   2444540 1980-10-27 2444533 1980-10-20 7 SVO
1   2444690 1981-03-26 2444682 1981-03-18 8 SVO
2   2444835 1981-08-18 2444831 1981-08-14 4 SVO
3   2444979 1982-01-09 2444980 1982-01-10 -1 SVO
4   2445135 1982-06-14 2445129 1982-06-08 6 SVO
5 9.7 2445287 1982-11-13 2445278 1982-11-04 9 SVO
6   2445435 1983-04-10 2445427 1983-04-02 8 SVO
7 9.7 2445592 1983-09-14 2445576 1983-08-29 16 SVO
8   2445735 1984-02-04 2445725 1984-01-25 10 SVO
9   2445883 1984-07-01 2445875 1984-06-23 8 SVO
10   2446035 1984-11-30 2446024 1984-11-19 11 SVO
11   2446180 1985-04-24 2446173 1985-04-17 7 SVO
12   2446333 1985-09-24 2446322 1985-09-13 11 SVO
13   2446484 1986-02-22 2446471 1986-02-09 13 SVO
14   2446630 1986-07-18 2446620 1986-07-08 10 SVO
15 9.8 2446776 1986-12-11 2446769 1986-12-04 7 SVO
17 9.9 2447084 1987-10-15 2447067 1987-09-28 17 SVO
18   2447240 1988-03-19 2447216 1988-02-24 24 SVO
19   2447390 1988-08-16 2447365 1988-07-22 25 SVO
20   2447525 1988-12-29 2447514 1988-12-18 11 SVO
22 10.1 2447847 1989-11-16 2447812 1989-10-12 35 SVO
23 9.9 2447984 1990-04-02 2447961 1990-03-10 23 SVO
24   2448130 1990-08-26 2448110 1990-08-06 20 SVO
25   2448275 1991-01-18 2448260 1991-01-03 15 SVO
26   2448425 1991-06-17 2448409 1991-06-01 16 SVO
27   2448575 1991-11-14 2448558 1991-10-28 17 SVO
28   2448730 1992-04-17 2448707 1992-03-25 23 SVO
30   2449020 1993-02-01 2449005 1993-01-17 15 SVO
31   2449170 1993-07-01 2449154 1993-06-15 16 AFOEV
32   2449320 1993-11-28 2449303 1993-11-11 17 SVO
36 10.1 2449934 1995-08-04 2449899 1995-06-30 35 SVO
37   2450075 1995-12-23 2450048 1995-11-26 27 AFOEV
38 9.9 2450214 1996-05-10 2450197 1996-04-23 17 SVO
39 9.9 2450365 1996-10-08 2450346 1996-09-19 19 SVO
40   2450519 1997-03-11 2450495 1997-02-15 24 AFOEV
41 10.2 2450682 1997-08-21 2450644 1997-07-14 38 SVO
42   2450830 1998-01-16 2450794 1997-12-11 36 AFOEV
43 9.8 2450962 1998-05-28 2450943 1998-05-09 19 SVO
44 9.8 2451112 1998-10-25 2451092 1998-10-05 20 SVO
45   2451264 1999-03-26 2451241 1999-03-03 23 AFOEV
46 9.9 2451429 1999-09-07 2451390 1999-07-30 39 SVO
47 9.8 2451571 2000-01-27 2451539 1999-12-26 32 SVO
48 9.8 2451719 2000-06-23 2451688 2000-05-23 31 SVO
49 10.0 2451874 2000-11-25 2451837 2000-10-19 37 SVO
50   2452040 2001-05-10 2451986 2001-03-17 54 AFOEV
51 9.8 2452182 2001-09-29 2452135 2001-08-13 47 SVO
52 9.7 2452321 2002-02-15 2452284 2002-01-09 37 SVO
53 10.3 2452480 2002-07-24 2452433 2002-06-07 47 SVO
54 10.0 2452636 2002-12-27 2452582 2002-11-03 54 SVO
55 9.8 2452786 2003-05-26 2452731 2003-04-01 55 SVO
56 9.8 2452941 2003-10-28 2452880 2003-08-28 61 SVO
57 9.7 2453094 2004-03-29 2453029 2004-01-24 65 SVO
58   2453251 2004-09-02 2453178 2004-06-21 73 AFOEV
59 9.9 2453396 2005-01-25 2453328 2004-11-18 68 SVO
60 9.9 2453545 2005-06-23 2453477 2005-04-16 68 SVO
61 10.0 2453700 2005-11-25 2453626 2005-09-12 74 SVO
62 9.9 2453857 2006-05-01 2453775 2006-02-08 82 SVO
63 9.9 2453998 2006-09-19 2453924 2006-07-07 74 SVO
64 9.9 2454142 2007-02-10 2454073 2006-12-03 69 SVO
65 9.9 2454292 2007-07-10 2454222 2007-05-01 70 SVO
66 9.9 2454445 2007-12-10 2454371 2007-09-27 74 SVO
67 10.2 2454599 2008-05-12 2454520 2008-02-23 79 SVO
68 9.8 2454738 2008-09-28 2454669 2008-07-21 69 SVO
69 10.1 2454899 2009-03-08 2454818 2008-12-17 81 SVO
70 9.7 2455040 2009-07-27 2454967 2009-05-15 73 SVO
71 10.0 2455189 2009-12-23 2455116 2009-10-11 73 SVO
72 10.3 2455348 2010-05-31 2455265 2010-03-09 83 SVO
73 9.9 2455496 2010-10-26 2455414 2010-08-05 82 SVO
74 10.3 2455656 2011-04-04 2455563 2011-01-01 93 SVO
75 9.6 2455796 2011-08-22 2455713 2011-05-31 83 SVO
76 9.7 2455948 2012-01-21 2455862 2011-10-27 86 SVO
77 9.7 2456103 2012-06-24 2456011 2012-03-24 92 SVO
78 9.5 2456250 2012-11-18 2456160 2012-08-20 90 SVO
79 9.9 2456403 2013-04-20 2456309 2013-01-16 94 SVO
80 9.8 2456556 2013-09-20 2456458 2013-06-14 98 SVO
81 9.9 2456709 2014-02-20 2456607 2013-11-10 102 SVO
82 9.6 2456858 2014-07-19 2456756 2014-04-08 102 SVO
83 9.8 2457009 2014-12-17 2456905 2014-09-04 104 SVO
84   2457155 2015-05-12 2457054 2015-01-31 101 SVO
85 9.4 2457308 2015-10-12 2457203 2015-06-29 105 SVO
86 10.1 2457464 2016-03-16 2457352 2015-11-25 112 SVO
87 9.8 2457616 2016-08-15 2457501 2016-04-22 115 SVO
88 9.6 2457757 2017-01-03 2457650 2016-09-18 107 SVO
89 10.0 2457912 2017-06-07 2457799 2017-02-14 113 SVO
90 9.6 2458063 2017-11-05 2457948 2017-07-13 115 SVO
91   2458200 2018-03-22 2458097 2017-12-09 103 SVO
92 9.4 2458354 2018-08-23 2458247 2018-05-08 107 SVO
93 9.5 2458505 2019-01-21 2458396 2018-10-04 109 SVO
94 9.6 2458657 2019-06-22 2458545 2019-03-02 112 SVO
95 9.6 2458807 2019-11-19 2458694 2019-07-29 113 SVO
96 9.6 2458950 2020-04-10 2458843 2019-12-25 107 SVO
97 10.4 2459115 2020-09-22 2458992 2020-05-22 123 SVO
98 9.8 2459252 2021-02-06 2459141 2020-10-18 111 SVO
99 9.5 2459401 2021-07-05 2459290 2021-03-16 111 SVO
100 9.5 2459553 2021-12-04 2459439 2021-08-12 114 SVO
101 9.5 2459697 2022-04-27 2459588 2022-01-08 109 SVO
102 10.1 2459866 2022-10-13 2459737 2022-06-06 129 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.