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Observation Summary for Variable Star S PER

Total observations:	12,220		Minimum magnitude:	13.600	Maximum magnitude:	7.390
First observation:	JD 2412327.500000	\	17 Aug 1892 00:00:00.000000 UT	Latest observation:	JD 2460972.378000	\	23 Oct 2025 21:04:19.200000 UT

Observation Method	Number of Observations
Visual	11,841
Photographic	12
CCD	339
CMOS	28

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Summary by Year and Month

Year	Total	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2025	15	1	3	3	2	1	0	0	1	2	2	0	0
2024	30	7	2	2	0	0	2	1	2	2	2	6	4
2023	28	9	6	0	2	1	1	0	1	2	3	2	1
2022	61	11	7	11	4	1	1	1	7	4	6	4	4
2021	55	4	11	6	9	2	1	1	0	8	9	3	1
2020	349	12	12	8	9	5	1	5	5	9	10	268	5
2019	56	8	12	6	2	0	0	2	5	5	6	3	7
2018	77	10	9	8	3	1	0	1	8	11	11	8	7
2017	66	13	5	12	6	0	1	0	3	1	6	9	10
2016	85	9	14	15	6	0	0	0	5	10	7	11	8
2015	76	13	12	8	8	0	0	1	4	11	7	6	6
2014	83	8	12	12	4	2	0	1	5	7	8	14	10
2013	77	11	13	5	6	2	0	2	3	8	11	9	7
2012	73	10	9	13	5	2	0	1	3	3	3	12	12
2011	48	6	7	7	1	2	1	0	0	6	3	9	6
2010	92	19	10	18	7	3	1	2	4	4	9	9	6
2009	88	11	8	12	7	5	2	2	6	6	4	7	18
2008	74	10	9	7	3	2	1	1	2	7	13	8	11
2007	98	14	12	9	3	2	0	2	5	12	18	10	11
2006	83	11	13	3	6	1	1	2	6	6	12	12	10
2005	55	6	8	2	1	1	2	0	3	8	9	9	6
2004	80	8	13	7	3	2	1	0	8	13	9	7	9
2003	116	17	13	16	9	0	2	2	10	11	11	11	14
2002	105	10	17	10	10	0	2	2	10	10	12	12	10
2001	79	13	8	7	4	1	0	0	5	9	9	8	15
2000	102	9	14	5	10	5	2	3	10	9	9	15	11
1999	140	14	18	19	10	3	4	8	11	11	16	14	12
1998	105	11	7	9	5	3	1	4	12	10	9	15	19
1997	72	4	7	5	3	2	0	6	14	8	12	6	5
1996	54	5	5	0	0	0	0	7	7	8	7	8	7
1995	78	10	9	9	5	2	0	5	11	7	7	8	5
1994	70	8	7	10	5	2	2	5	7	4	7	4	9
1993	67	6	5	8	2	1	1	5	7	6	9	7	10
1992	94	11	9	8	6	0	0	7	7	7	11	12	16
1991	91	11	8	13	8	2	2	3	6	8	9	13	8
1990	142	15	10	17	11	3	6	14	10	12	18	12	14
1989	186	32	16	21	10	7	8	13	17	17	18	17	10
1988	222	24	21	20	11	8	4	10	16	28	27	25	28
1987	190	15	18	25	13	7	3	11	17	20	23	18	20
1986	225	25	21	27	20	8	8	11	12	20	26	23	24
1985	207	25	25	29	17	4	4	11	16	14	25	17	20
1984	231	26	21	13	25	8	8	17	15	17	25	27	29
1983	233	28	28	27	16	5	3	14	17	18	27	26	24
1982	191	15	21	30	10	5	1	5	16	29	18	22	19
1981	137	18	19	14	12	9	3	4	8	10	15	13	12
1980	138	10	9	8	13	2	1	8	15	13	19	22	18
1979	94	8	11	7	3	1	2	3	5	19	13	12	10
1978	133	19	11	18	8	4	3	7	10	18	12	16	7
1977	166	11	13	16	19	6	5	12	15	18	24	9	18
1976	199	14	9	14	19	5	7	14	24	20	22	33	18
1975	274	40	19	19	13	9	17	14	42	34	26	23	18
1974	273	18	20	13	20	9	9	15	27	42	31	34	35
1973	157	7	12	16	8	8	5	9	12	22	17	26	15
1969	92	7	9	7	8	3	8	4	8	11	6	11	10
1968	97	10	12	11	9	2	9	7	7	8	8	4	10
1967	117	14	9	12	6	3	6	9	9	11	14	11	13
1966	87	5	5	7	2	6	5	4	9	6	11	13	14
1965	101	13	10	13	8	0	6	7	11	6	8	10	9
1964	103	5	8	4	5	3	5	7	15	19	12	8	12
1963	80	9	10	6	5	6	2	8	7	5	5	6	11
1962	107	6	10	10	9	6	5	7	11	10	16	7	10
1961	127	6	6	17	6	8	4	8	12	15	17	15	13
1960	7	1	1	0	0	0	0	1	2	1	0	1	0
1959	17	7	0	1	1	0	0	1	1	2	2	1	1
1958	8	1	0	1	1	1	0	1	0	0	1	2	0
1957	12	1	2	2	1	1	1	0	1	1	1	1	0
1956	11	1	0	1	1	1	0	0	2	1	1	2	1
1955	20	1	2	2	2	3	1	1	2	2	2	0	2
1954	23	1	1	1	5	2	2	1	3	1	2	1	3
1953	20	1	3	2	4	3	0	2	2	1	1	0	1
1952	18	1	0	1	2	2	0	2	1	1	2	3	3
1951	12	1	1	1	2	1	1	1	2	1	1	0	0
1950	24	3	7	4	1	0	2	1	2	1	1	1	1
1948	52	4	1	11	5	1	1	5	6	6	5	4	3
1946	143	7	15	14	15	10	1	9	10	13	14	16	19
1945	110	4	8	14	7	2	2	4	14	15	23	8	9
1944	38	2	0	5	2	1	0	0	0	4	9	6	9
1943	8	0	1	0	1	0	0	0	2	1	0	2	1
1941	17	6	7	3	0	0	0	0	0	1	0	0	0
1940	171	23	13	27	29	9	5	12	12	12	13	7	9
1939	250	20	30	21	45	15	8	18	21	16	18	17	21
1938	280	22	22	42	29	8	14	20	23	19	25	35	21
1937	169	13	19	11	8	6	6	10	14	16	22	24	20
1936	152	20	17	17	16	4	7	4	13	12	19	10	13
1935	271	18	20	27	23	19	13	20	21	24	27	34	25
1934	216	28	24	23	9	8	10	12	20	28	23	16	15
1933	250	20	20	34	19	11	12	24	27	29	21	18	15
1932	232	23	28	31	16	14	11	13	17	13	29	20	17
1931	252	19	21	27	19	13	11	13	17	24	36	28	24
1930	197	19	16	13	11	8	12	9	15	21	26	24	23
1929	259	20	18	37	17	17	7	21	21	37	25	19	20
1928	283	33	25	22	13	6	12	30	26	29	30	29	28
1927	319	40	24	29	19	13	14	21	38	37	28	31	25
1926	445	52	35	49	30	16	9	34	39	53	45	41	42
1925	331	29	32	28	16	12	17	16	22	37	34	42	46
1924	181	18	12	30	17	11	7	13	12	16	13	14	18
1923	80	4	4	5	4	4	1	5	9	14	8	10	12
1922	37	2	4	3	4	3	1	2	3	3	4	4	4
1921	25	2	2	3	2	2	1	2	2	2	2	3	2
1920	21	2	3	2	2	3	1	3	1	3	1	0	0
1895	2	0	0	0	0	0	0	0	2	0	0	0	0
1894	8	1	2	0	0	0	0	0	1	2	1	1	0
1893	12	0	1	0	0	0	0	1	1	5	2	2	0
1892	6	0	0	0	0	0	0	0	1	0	1	3	1