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Observation Summary for Variable Star OP HER

Total observations:	8,088		Minimum magnitude:	7.400	Maximum magnitude:	5.200
First observation:	JD 2440230.612000	\	9 Jan 1969 02:41:16.800000 UT	Latest observation:	JD 2460978.313000	\	29 Oct 2025 19:30:43.200000 UT

Observation Method	Number of Observations
Visual	7,655
CCD	26
CMOS	289
PEP	118

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Summary by Year and Month

Year	Total	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2025	59	4	3	6	6	8	3	7	9	9	4	0	0
2024	59	3	4	3	6	6	6	4	7	6	8	5	1
2023	82	8	3	2	4	7	8	6	6	9	13	11	5
2022	363	10	3	5	7	6	7	6	63	72	71	102	11
2021	93	12	4	5	10	9	5	12	5	9	6	8	8
2020	107	3	5	5	12	14	10	9	7	15	8	8	11
2019	60	5	5	5	5	4	4	5	7	5	6	3	6
2018	72	8	6	5	6	8	5	7	7	10	5	3	2
2017	66	5	5	6	4	6	6	4	8	6	4	6	6
2016	70	4	6	7	8	6	4	8	8	4	3	7	5
2015	79	8	6	6	7	6	5	8	6	11	7	5	4
2014	90	6	5	6	8	9	4	10	8	11	7	9	7
2013	101	4	1	7	12	9	6	7	9	11	16	9	10
2012	89	6	5	11	9	11	1	6	11	9	7	8	5
2011	98	6	7	5	12	9	9	5	7	10	11	11	6
2010	104	8	5	10	9	11	8	8	10	7	10	9	9
2009	106	6	4	8	14	11	8	10	8	9	7	11	10
2008	108	5	8	6	11	10	12	9	4	11	11	10	11
2007	133	13	5	8	13	10	8	11	12	17	13	12	11
2006	144	11	4	11	11	18	9	13	15	14	13	13	12
2005	119	14	3	7	10	13	7	8	13	11	10	13	10
2004	131	7	8	12	14	11	8	9	14	10	15	9	14
2003	175	14	8	16	16	15	9	13	17	18	17	15	17
2002	152	9	7	7	16	13	12	15	16	12	14	17	14
2001	184	11	8	8	17	17	16	13	15	16	22	18	23
2000	164	11	6	10	13	18	10	12	19	18	17	18	12
1999	211	15	10	11	16	12	11	19	21	27	23	20	26
1998	202	13	6	7	12	17	9	10	33	22	22	27	24
1997	125	5	6	7	11	24	10	14	12	11	13	5	7
1996	96	2	5	2	7	9	13	12	12	9	7	10	8
1995	220	11	6	19	19	21	18	22	32	26	22	17	7
1994	227	12	9	16	17	13	14	15	22	30	36	25	18
1993	204	9	10	17	9	19	18	17	26	22	27	15	15
1992	220	10	9	12	18	22	15	21	32	20	23	21	17
1991	136	14	7	10	10	13	9	12	18	14	8	12	9
1990	133	7	9	7	14	14	10	13	9	16	12	11	11
1989	181	12	5	11	11	21	13	16	30	16	21	17	8
1988	199	17	7	8	12	18	14	16	21	22	21	26	17
1987	264	15	7	15	30	26	18	22	30	26	32	23	20
1986	256	15	6	17	16	20	14	17	19	38	39	27	28
1985	264	18	13	21	24	27	14	22	28	26	30	23	18
1984	272	8	3	5	34	21	19	33	32	26	39	23	29
1983	187	8	7	15	15	15	16	14	19	16	27	19	16
1982	153	11	5	11	18	18	6	18	15	19	16	6	10
1981	159	4	2	6	13	11	9	17	28	13	26	17	13
1980	105	4	3	5	9	10	3	10	14	11	10	14	12
1979	120	5	4	8	8	8	4	11	13	16	14	16	13
1978	80	4	1	5	5	6	7	6	5	10	10	10	11
1977	98	5	1	5	7	13	4	9	14	13	16	7	4
1976	161	5	5	9	12	9	9	22	27	14	15	24	10
1975	163	4	4	3	14	13	16	16	28	20	21	16	8
1974	189	3	5	3	10	18	11	20	26	24	26	28	15
1973	128	4	2	5	5	11	8	5	17	20	19	18	14
1972	128	3	0	3	15	10	7	16	25	13	15	14	7
1971	173	2	7	4	26	28	2	27	18	1	32	19	7
1970	12	1	2	2	0	2	1	1	0	1	1	0	1
1969	14	2	0	3	1	0	2	1	3	1	0	0	1