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Observation Summary for Variable Star X PER

Total observations:	15,100		Minimum magnitude:	6.900	Maximum magnitude:	5.600
First observation:	JD 2439816.400000	\	21 Nov 1967 21:36:00.000000 UT	Latest observation:	JD 2460978.493700	\	29 Oct 2025 23:50:55.680000 UT

Observation Method	Number of Observations
Visual	14,776
Photographic	22
CCD	41
CMOS	89
PEP	172

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Summary by Year and Month

Year	Total	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2025	124	15	23	14	9	0	0	1	20	30	12	0	0
2024	101	17	11	8	4	0	0	1	7	16	12	10	15
2023	140	31	19	6	10	0	0	0	4	9	16	24	21
2022	176	39	21	31	7	0	0	3	7	13	18	15	22
2021	174	18	28	20	29	1	0	1	4	10	18	30	15
2020	211	19	19	21	13	1	0	5	6	32	38	26	31
2019	203	28	45	16	11	0	0	4	7	19	23	22	28
2018	209	34	35	13	5	2	0	5	11	19	34	23	28
2017	174	31	13	26	8	1	0	3	14	11	19	21	27
2016	249	33	54	41	10	1	0	3	17	12	17	33	28
2015	207	35	36	33	19	1	0	4	10	16	13	20	20
2014	257	37	38	40	15	0	0	12	17	16	21	26	35
2013	269	30	33	28	16	2	0	5	10	26	33	41	45
2012	268	49	39	56	11	0	0	3	7	19	16	32	36
2011	240	34	30	38	21	1	0	0	3	22	24	34	33
2010	224	38	27	32	16	0	0	1	17	19	23	23	28
2009	246	44	25	36	15	1	0	5	9	16	22	34	39
2008	224	29	40	19	12	1	0	3	9	23	31	27	30
2007	302	41	33	40	23	0	0	3	8	20	40	45	49
2006	248	39	39	17	19	0	0	9	6	18	22	49	30
2005	227	40	37	25	9	0	0	1	17	20	11	36	31
2004	249	37	41	24	14	0	0	3	10	17	33	31	39
2003	311	54	43	57	19	1	0	4	22	29	27	25	30
2002	289	51	44	43	30	0	0	3	11	14	25	37	31
2001	318	35	42	43	15	0	0	5	15	22	36	40	65
2000	323	48	53	48	17	1	0	4	17	22	33	43	37
1999	436	58	51	58	40	1	0	5	18	33	49	65	58
1998	442	69	56	44	27	4	2	5	27	34	53	59	62
1997	310	23	36	51	33	1	1	4	27	36	44	22	32
1996	175	9	30	8	13	1	0	9	10	16	21	31	27
1995	367	46	40	65	28	2	0	12	29	37	44	38	26
1994	428	74	50	55	35	0	0	6	16	34	63	37	58
1993	402	53	38	63	16	2	0	9	24	33	49	49	66
1992	443	50	42	31	20	0	0	8	47	41	67	70	67
1991	323	46	19	28	18	1	0	4	20	29	31	69	58
1990	265	47	46	34	21	0	0	7	8	21	22	24	35
1989	324	49	45	50	30	1	0	4	21	19	32	47	26
1988	433	65	67	46	38	0	0	5	15	37	50	62	48
1987	392	63	36	54	27	0	3	7	17	26	49	63	47
1986	487	57	52	75	26	0	1	7	19	46	79	60	65
1985	358	47	62	54	19	0	0	5	16	14	41	48	52
1984	358	53	38	29	32	0	0	6	20	27	63	39	51
1983	237	39	31	18	18	2	1	5	12	18	33	26	34
1982	220	37	31	36	13	0	0	5	7	21	23	22	25
1981	194	22	22	19	18	1	0	4	10	13	34	29	22
1980	192	24	9	23	14	0	0	4	13	14	18	36	37
1979	197	26	22	26	11	0	0	6	9	27	22	28	20
1978	167	19	22	27	8	0	0	3	8	12	24	29	15
1977	174	22	18	27	13	0	0	2	4	15	33	23	17
1976	214	25	25	25	20	0	0	12	18	14	26	32	17
1975	292	57	34	32	18	0	0	5	16	27	31	41	31
1974	329	44	35	25	23	0	0	10	30	26	37	56	43
1973	364	26	53	57	10	0	0	4	13	29	47	70	55
1972	198	21	11	8	8	0	0	2	15	17	35	43	38
1971	175	19	25	17	11	0	0	11	16	1	27	32	16
1970	198	8	19	33	10	0	0	5	5	15	32	33	38
1969	32	4	0	2	2	0	0	0	3	2	6	8	5
1968	5	1	2	1	0	0	0	0	0	0	1	0	0
1967	6	0	0	0	0	0	0	0	0	0	0	1	5