Maxima for U Per
Period: 320.26, Epoch: 2445066
Back to main page  Mean light curve  Period diagram

E Mag O (JD) O (dat) C (JD) C (Dat) O-C Source
-104   2411673 1890-11-01 2411759 1891-01-26 -86 AnHar, 1937, vol 105, p 459
-103   2411986 1891-09-10 2412079 1891-12-12 -93 AnHar, 1909, vol 55, p 95
-102   2412314 1892-08-03 2412399 1892-10-27 -85 AnHar, 1909, vol 55, p 95
-101   2412634 1893-06-19 2412720 1893-09-13 -86 AnHar, 1909, vol 55, p 95
-100   2412939 1894-04-20 2413040 1894-07-30 -101 AnHar, 1909, vol 55, p 95
-99 7.2 2413254 1895-03-01 2413360 1895-06-15 -106 AAVSO
-98 6.9 2413564 1896-01-05 2413681 1896-05-01 -117 AAVSO
-97 7.3 2413880 1896-11-16 2414001 1897-03-17 -121 AAVSO
-96 7.4 2414200 1897-10-02 2414321 1898-01-31 -121 AAVSO
-95 7.4 2414530 1898-08-28 2414641 1898-12-17 -111 AAVSO
-94   2414850 1899-07-14 2414962 1899-11-03 -112 AnHar, 1909, vol 55, p 95
-93 7.3 2415177 1900-06-06 2415282 1900-09-19 -105 AAVSO
-92   2415500 1901-04-25 2415602 1901-08-05 -102 SVO
-91   2415810 1902-03-01 2415922 1902-06-21 -112 AAVSO
-90 7.9 2416128 1903-01-13 2416243 1903-05-08 -115 AAVSO
-89   2416434 1903-11-15 2416563 1904-03-23 -129 AAVSO
-88 7.7 2416763 1904-10-09 2416883 1905-02-06 -120 AAVSO
-87 8.1 2417084 1905-08-26 2417203 1905-12-23 -119 SVO
-86   2417397 1906-07-05 2417524 1906-11-09 -127 AAVSO
-85 7.7 2417701 1907-05-05 2417844 1907-09-25 -143 AAVSO
-84 7.9 2418020 1908-03-19 2418164 1908-08-10 -144 AAVSO
-83 8.2 2418321 1909-01-14 2418484 1909-06-26 -163 AAVSO
-82 7.7 2418638 1909-11-27 2418805 1910-05-13 -167 AAVSO
-81 7.8 2418958 1910-10-13 2419125 1911-03-29 -167 AAVSO
-80   2419292 1911-09-12 2419445 1912-02-12 -153 MNRAS, 1919, vol 79, p 513
-79   2419571 1912-06-17 2419765 1912-12-28 -194 MNRAS, 1919, vol 79, p 513
-78   2419898 1913-05-10 2420086 1913-11-14 -188 AAVSO
-77 7.9 2420227 1914-04-04 2420406 1914-09-30 -179 AAVSO
-76 8.3 2420537 1915-02-08 2420726 1915-08-16 -189 SVO
-75 7.8 2420880 1916-01-17 2421047 1916-07-02 -167 SVO
-74 7.9 2421193 1916-11-25 2421367 1917-05-18 -174 SVO
-73 8.1 2421504 1917-10-02 2421687 1918-04-03 -183 SVO
-72 8.1 2421829 1918-08-23 2422007 1919-02-17 -178 SVO
-71 8.0 2422154 1919-07-14 2422328 1920-01-04 -174 AAVSO
-70 8.0 2422459 1920-05-14 2422648 1920-11-19 -189 SVO
-69 8.2 2422803 1921-04-23 2422968 1921-10-05 -165 SVO
-68 8.2 2423112 1922-02-26 2423288 1922-08-21 -176 SVO
-67 8.2 2423440 1923-01-20 2423609 1923-07-08 -169 SVO
-66 8.4 2423759 1923-12-05 2423929 1924-05-23 -170 AAVSO
-65 8.2 2424080 1924-10-21 2424249 1925-04-08 -169 AAVSO
-64 8.2 2424401 1925-09-07 2424569 1926-02-22 -168 AAVSO
-63 8.2 2424741 1926-08-13 2424890 1927-01-09 -149 AAVSO
-62 8.1 2425061 1927-06-29 2425210 1927-11-25 -149 SVO
-61 8.2 2425373 1928-05-06 2425530 1928-10-10 -157 SVO
-60 8.2 2425690 1929-03-19 2425850 1929-08-26 -160 AAVSO
-59 8.0 2426000 1930-01-23 2426171 1930-07-13 -171 SVO
-58 8.0 2426323 1930-12-12 2426491 1931-05-29 -168 SVO
-57 8.3 2426654 1931-11-08 2426811 1932-04-13 -157 SVO
-56 8.1 2426979 1932-09-28 2427131 1933-02-27 -152 SVO
-55 8.2 2427305 1933-08-20 2427452 1934-01-14 -147 SVO
-54 8.0 2427630 1934-07-11 2427772 1934-11-30 -142 SVO
-53 7.8 2427950 1935-05-27 2428092 1935-10-16 -142 SVO
-52 8.3 2428290 1936-05-01 2428412 1936-08-31 -122 SVO
-51 8.3 2428619 1937-03-26 2428733 1937-07-18 -114 SVO
-50 8.0 2428951 1938-02-21 2429053 1938-06-03 -102 SVO
-49 7.9 2429276 1939-01-12 2429373 1939-04-19 -97 SVO
-48 8.0 2429606 1939-12-08 2429694 1940-03-05 -88 SVO
-47 8.1 2429940 1940-11-06 2430014 1941-01-19 -74 SVO
-46 7.9 2430255 1941-09-17 2430334 1941-12-05 -79 SVO
-45 8.0 2430593 1942-08-21 2430654 1942-10-21 -61 SVO
-44 8.3 2430920 1943-07-14 2430975 1943-09-07 -55 SVO
-43 8.3 2431256 1944-06-14 2431295 1944-07-23 -39 SVO
-42 8.3 2431590 1945-05-14 2431615 1945-06-08 -25 AAVSO
-41 8.3 2431925 1946-04-14 2431935 1946-04-24 -10 SVO
-40 8.1 2432259 1947-03-14 2432256 1947-03-11 3 SVO
-39 8.0 2432575 1948-01-24 2432576 1948-01-25 -1 SVO
-38 8.2 2432894 1948-12-08 2432896 1948-12-10 -2 SVO
-37 8.0 2433207 1949-10-17 2433216 1949-10-26 -9 SVO
-36 7.8 2433538 1950-09-13 2433537 1950-09-12 1 SVO
-35 8.1 2433872 1951-08-13 2433857 1951-07-29 15 SVO
-34 8.1 2434192 1952-06-28 2434177 1952-06-13 15 SVO
-33 8.4 2434509 1953-05-11 2434497 1953-04-29 12 AAVSO
-32 8.0 2434829 1954-03-27 2434818 1954-03-16 11 AAVSO
-31 8.1 2435154 1955-02-15 2435138 1955-01-30 16 AAVSO
-30 8.0 2435477 1956-01-04 2435458 1955-12-16 19 SVO
-29 8.0 2435795 1956-11-17 2435778 1956-10-31 17 SVO
-28 8.0 2436115 1957-10-03 2436099 1957-09-17 16 SVO
-27 8.0 2436425 1958-08-09 2436419 1958-08-03 6 SVO
-26 8.1 2436744 1959-06-24 2436739 1959-06-19 5 SVO
-25 8.0 2437062 1960-05-07 2437060 1960-05-05 2 AAVSO
-24 8.4 2437389 1961-03-30 2437380 1961-03-21 9 AAVSO
-23 8.0 2437703 1962-02-07 2437700 1962-02-04 3 SVO
-22 8.0 2438022 1962-12-23 2438020 1962-12-21 2 SVO
-21 8.1 2438340 1963-11-06 2438341 1963-11-07 -1 SVO
-20 8.0 2438654 1964-09-15 2438661 1964-09-22 -7 SVO
-19 8.0 2438979 1965-08-06 2438981 1965-08-08 -2 SVO
-18 8.2 2439291 1966-06-14 2439301 1966-06-24 -10 SVO
-17 8.3 2439623 1967-05-12 2439622 1967-05-11 1 SVO
-16 7.9 2439932 1968-03-16 2439942 1968-03-26 -10 SVO
-15 8.2 2440258 1969-02-05 2440262 1969-02-09 -4 SVO
-14 7.9 2440572 1969-12-16 2440582 1969-12-26 -10 SVO
-13 8.0 2440898 1970-11-07 2440903 1970-11-12 -5 SVO
-12 7.8 2441208 1971-09-13 2441223 1971-09-28 -15 SVO
-11 8.1 2441540 1972-08-10 2441543 1972-08-13 -3 SVO
-10 8.1 2441863 1973-06-29 2441863 1973-06-29 0 SVO
-9 8.1 2442182 1974-05-14 2442184 1974-05-16 -2 SVO
-8 8.2 2442508 1975-04-05 2442504 1975-04-01 4 SVO
-7 7.8 2442833 1976-02-24 2442824 1976-02-15 9 SVO
-6 8.3 2443163 1977-01-19 2443144 1976-12-31 19 SVO
-5 8.2 2443490 1977-12-12 2443465 1977-11-17 25 SVO
-4 8.0 2443820 1978-11-07 2443785 1978-10-03 35 SVO
-3 8.1 2444132 1979-09-15 2444105 1979-08-19 27 SVO
-2 8.0 2444448 1980-07-27 2444425 1980-07-04 23 SVO
-1 8.1 2444750 1981-05-25 2444746 1981-05-21 4 SVO
0 8.1 2445073 1982-04-13 2445066 1982-04-06 7 SVO
1 8.2 2445395 1983-03-01 2445386 1983-02-20 9 SVO
2 7.9 2445708 1984-01-08 2445707 1984-01-07 1 SVO
3 7.9 2446028 1984-11-23 2446027 1984-11-22 1 SVO
4 8.0 2446352 1985-10-13 2446347 1985-10-08 5 SVO
5 8.1 2446670 1986-08-27 2446667 1986-08-24 3 SVO
6 8.2 2446994 1987-07-17 2446988 1987-07-11 6 SVO
7 7.9 2447308 1988-05-26 2447308 1988-05-26 0 SVO
8 8.3 2447614 1989-03-28 2447628 1989-04-11 -14 SVO
9 7.9 2447932 1990-02-09 2447948 1990-02-25 -16 SVO
10 7.9 2448238 1990-12-12 2448269 1991-01-12 -31 SVO
11 8.1 2448552 1991-10-22 2448589 1991-11-28 -37 SVO
12 8.3 2448877 1992-09-11 2448909 1992-10-13 -32 SVO
13 8.2 2449199 1993-07-30 2449229 1993-08-29 -30 SVO
14 8.0 2449512 1994-06-08 2449550 1994-07-16 -38 SVO
15 8.2 2449834 1995-04-26 2449870 1995-06-01 -36 SVO
16 7.9 2450145 1996-03-02 2450190 1996-04-16 -45 SVO
17 8.0 2450470 1997-01-21 2450510 1997-03-02 -40 SVO
18 8.1 2450795 1997-12-12 2450831 1998-01-17 -36 SVO
19 8.0 2451107 1998-10-20 2451151 1998-12-03 -44 SVO
20 8.0 2451423 1999-09-01 2451471 1999-10-19 -48 SVO
21 8.1 2451742 2000-07-16 2451791 2000-09-03 -49 SVO
22 8.0 2452057 2001-05-27 2452112 2001-07-21 -55 SVO
23 8.2 2452388 2002-04-23 2452432 2002-06-06 -44 SVO
24 8.1 2452704 2003-03-05 2452752 2003-04-22 -48 SVO
25 7.9 2453024 2004-01-19 2453073 2004-03-08 -49 SVO
26 8.2 2453345 2004-12-05 2453393 2005-01-22 -48 SVO
27 8.1 2453667 2005-10-23 2453713 2005-12-08 -46 SVO
28 8.0 2453995 2006-09-16 2454033 2006-10-24 -38 SVO
29 8.1 2454316 2007-08-03 2454354 2007-09-10 -38 SVO
30 8.1 2454637 2008-06-19 2454674 2008-07-26 -37 SVO
31 8.2 2454949 2009-04-27 2454994 2009-06-11 -45 SVO
32 8.0 2455276 2010-03-20 2455314 2010-04-27 -38 SVO
33 8.2 2455592 2011-01-30 2455635 2011-03-14 -43 SVO
34 8.0 2455909 2011-12-13 2455955 2012-01-28 -46 SVO
35 8.4 2456228 2012-10-27 2456275 2012-12-13 -47 SVO
36 7.9 2456542 2013-09-06 2456595 2013-10-29 -53 SVO
37 8.3 2456858 2014-07-19 2456916 2014-09-15 -58 SVO
38 8.2 2457177 2015-06-03 2457236 2015-08-01 -59 SVO
39 8.1 2457492 2016-04-13 2457556 2016-06-16 -64 SVO
40 8.3 2457813 2017-02-28 2457876 2017-05-02 -63 SVO
41 8.4 2458141 2018-01-22 2458197 2018-03-19 -56 SVO
42 8.3 2458470 2018-12-17 2458517 2019-02-02 -47 SVO
43   2458800 2019-11-12 2458837 2019-12-19 -37 SVO
44 8.3 2459126 2020-10-03 2459157 2020-11-03 -31 SVO
45 8.2 2459448 2021-08-21 2459478 2021-09-20 -30 SVO
46 8.0 2459766 2022-07-05 2459798 2022-08-06 -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.