	British Astronomical Association Supporting amateur astronomers since 1890		Home	Login
			Help

Observation Summary for Variable Star MARKARIAN 509

Total observations:	303		Minimum magnitude:	14.800	Maximum magnitude:	13.700
First observation:	JD 2444815.478000	\	29 Jul 1981 23:28:19.200000 UT	Latest observation:	JD 2460259.264000	\	10 Nov 2023 18:20:09.600000 UT

Observation Method	Number of Observations
Visual	303

Observer Id	Observer Name	Number of Observations	First Observation JD / UT	Latest Observation JD / UT	Minimum Magnitude	Maximum Magnitude
TJ	J Toone	194	2444815.478000 29 Jul 1981 23:28:19.200000	2460259.264000 10 Nov 2023 18:20:09.600000	14.630	13.700
XG	G Poyner	34	2448823.552000 20 Jul 1992 01:14:52.800000	2450693.504100 2 Sep 1997 00:05:54.240000	14.430	13.700
CPJ	C P Jones	75	2451405.502700 15 Aug 1999 00:03:53.280000	2455061.404900 17 Aug 2009 21:43:03.360000	14.800	13.800