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Observation Summary for Variable Star 3C 273

Total observations:	2,681		Minimum magnitude:	15.200	Maximum magnitude:	10.100
First observation:	JD 2444706.441000	\	11 Apr 1981 22:35:02.400000 UT	Latest observation:	JD 2460901.471500	\	13 Aug 2025 23:18:57.600000 UT

Observation Method	Number of Observations
Visual	2,530
CCD	151

Year	Total	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Nov	Dec
2025	48	4	3	3	10	18	7	2	1	0	0
2024	25	2	2	3	6	6	3	1	0	1	1
2023	84	6	3	9	12	41	4	2	0	3	4
2022	50	4	6	11	12	10	3	0	0	1	3
2021	58	4	4	12	21	15	2	0	0	0	0
2020	131	5	8	19	19	75	0	0	0	1	4
2019	43	3	5	10	12	9	1	0	0	1	2
2018	46	2	5	6	8	20	1	0	0	1	3
2017	42	2	2	9	11	12	2	0	0	2	2
2016	44	3	2	11	12	10	2	0	0	1	3
2015	68	3	5	8	23	19	6	0	0	2	2
2014	47	2	3	8	13	18	1	0	0	0	2
2013	69	2	2	6	26	24	5	0	0	1	3
2012	58	2	3	14	13	19	1	0	0	3	3
2011	49	3	5	4	15	18	1	0	0	1	2
2010	46	3	4	6	15	13	1	0	0	3	1
2009	83	9	4	14	23	22	3	0	0	4	4
2008	69	3	4	11	17	24	4	0	0	3	3
2007	60	2	1	4	26	20	4	0	0	1	2
2006	32	0	0	4	10	11	4	0	0	2	1
2005	49	3	1	4	12	21	4	0	0	0	4
2004	52	1	4	5	17	18	5	0	0	1	1
2003	87	2	1	27	31	18	4	0	0	1	3
2002	55	2	1	1	24	23	3	0	0	0	1
2001	76	2	3	8	31	25	4	0	0	1	2
2000	67	1	3	14	27	19	1	0	0	1	1
1999	67	3	3	17	23	12	6	0	0	1	2
1998	61	2	5	9	19	22	1	0	0	2	1
1997	70	3	5	12	17	26	5	0	0	1	1
1996	60	0	7	4	17	21	8	0	0	1	2
1995	75	2	3	22	19	23	2	0	0	3	1
1994	76	2	3	12	25	25	7	0	0	0	2
1993	67	3	5	18	11	18	8	0	0	1	3
1992	44	2	3	4	10	24	0	0	0	0	1
1991	45	3	2	4	19	10	3	0	0	0	4
1990	52	2	2	11	20	13	2	0	0	1	1
1989	54	3	3	15	9	20	2	0	0	0	2
1988	98	7	5	15	31	26	8	1	0	2	3
1987	91	6	5	20	28	20	5	0	0	5	2
1986	74	7	7	11	16	17	10	0	0	1	5
1985	59	6	6	13	21	8	2	0	0	0	3
1984	49	3	4	4	23	5	5	0	0	2	3
1983	63	4	7	11	19	14	8	0	0	0	0
1982	28	4	4	6	4	5	2	0	0	2	1
1981	10	0	0	0	4	4	1	0	0	1	0