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Observation Summary for Variable Star U BOO

Total observations:10,270Minimum magnitude: 14.400Maximum magnitude: 8.550
First observation:JD 2407787.500000\13 Mar 1880 00:00:00.000000 UTLatest observation:JD 2460425.424000\24 Apr 2024 22:10:33.600000 UT
Observation MethodNumber of Observations
Visual10,255
CCD15

Back to Basic Summary

Summary by Stars

Observer IdObserver NameNumber of ObservationsFirst Observation JD / UTLatest Observation JD / UTMinimum MagnitudeMaximum Magnitude
BHC F Butterworth1,2752421718.000000
4 May 1918 12:00:00.000000		2430077.500000
24 Mar 1941 00:00:00.000000		12.5609.480
BCC L Brook232421733.000000
19 May 1918 12:00:00.000000		2423292.000000
25 Aug 1922 12:00:00.000000		12.2509.950
DF De Roy3982421968.000000
9 Jan 1919 12:00:00.000000		2427785.000000
13 Dec 1934 12:00:00.000000		12.7009.760
BNA N Brown3192422073.000000
24 Apr 1919 12:00:00.000000		2427723.000000
12 Oct 1934 12:00:00.000000		12.58010.000
HTHH Thomson32422382.000000
27 Feb 1920 12:00:00.000000		2422400.000000
16 Mar 1920 12:00:00.000000		11.85011.390
MGG Merton132422490.000000
14 Jun 1920 12:00:00.000000		2422618.000000
20 Oct 1920 12:00:00.000000		12.28010.100
GIN V Ginori542422528.000000
22 Jul 1920 12:00:00.000000		2423618.000000
17 Jul 1923 12:00:00.000000		12.9609.750
LIW M Lindley2162423346.000000
18 Oct 1922 12:00:00.000000		2429494.400000
18 Aug 1939 21:36:00.000000		12.8908.550
HAG P B Hallowes2142423853.000000
8 Mar 1924 12:00:00.000000		2426625.000000
10 Oct 1931 12:00:00.000000		12.5709.550
SOS Solberg12423878.000000
2 Apr 1924 12:00:00.000000		2423878.000000
2 Apr 1924 12:00:00.000000		10.16010.160
STG E B Stephenson1172424299.000000
28 May 1925 12:00:00.000000		2425826.000000
2 Aug 1929 12:00:00.000000		12.0009.650
WFHW F H Waterfield52424675.000000
8 Jun 1926 12:00:00.000000		2424704.000000
7 Jul 1926 12:00:00.000000		10.99010.540
SAF Sargent1742424678.000000
11 Jun 1926 12:00:00.000000		2429171.500000
30 Sep 1938 00:00:00.000000		12.2809.600
SHW L Shepherd1142425254.000000
8 Jan 1928 12:00:00.000000		2433919.300000
29 Sep 1951 19:12:00.000000		12.98010.020
EDXL F Edwards82425343.000000
6 Apr 1928 12:00:00.000000		2425722.000000
20 Apr 1929 12:00:00.000000		10.3909.850
LHA W Lane-Hall1412425587.000000
6 Dec 1928 12:00:00.000000		2427515.000000
18 Mar 1934 12:00:00.000000		12.1509.750
SNW Strachan692426037.000000
1 Mar 1930 12:00:00.000000		2427270.000000
16 Jul 1933 12:00:00.000000		12.01010.100
WRM L Webber252427570.000000
12 May 1934 12:00:00.000000		2427693.000000
12 Sep 1934 12:00:00.000000		12.38010.890
HLF M Holborn7132427928.500000
6 May 1935 00:00:00.000000		2437046.400000
21 Apr 1960 21:36:00.000000		13.1309.740
WBH Webber22427929.400000
6 May 1935 21:36:00.000000		2428403.400000
22 Aug 1936 21:36:00.000000		11.4709.940
PAG E Patston1962427957.400000
3 Jun 1935 21:36:00.000000		2436689.400000
30 Apr 1959 21:36:00.000000		13.0209.660
WLH Wildey2562428611.500000
19 Mar 1937 00:00:00.000000		2433067.400000
30 May 1949 21:36:00.000000		13.2009.850
KTN F H Knight732428873.700000
6 Dec 1937 04:48:00.000000		2429510.400000
3 Sep 1939 21:36:00.000000		13.20010.100
BZJ R Bazin2042429718.400000
29 Mar 1940 21:36:00.000000		2433945.300000
25 Oct 1951 19:12:00.000000		12.8609.850
KIH C King372430847.400000
2 May 1943 21:36:00.000000		2432450.400000
21 Sep 1947 21:36:00.000000		13.20010.360
HEA Heath62432009.500000
8 Jul 1946 00:00:00.000000		2432425.400000
27 Aug 1947 21:36:00.000000		11.95010.990
ANR G Andrews1392433472.500000
10 Jul 1950 00:00:00.000000		2436867.300000
25 Oct 1959 19:12:00.000000		12.9609.640
FRJ Friends182434225.500000
1 Aug 1952 00:00:00.000000		2438236.500000
26 Jul 1963 00:00:00.000000		12.2509.850
JOH Joy42434981.400000
26 Aug 1954 21:36:00.000000		2435008.300000
22 Sep 1954 19:12:00.000000		11.08010.760
GRR F Griffin132435005.300000
19 Sep 1954 19:12:00.000000		2435774.300000
27 Oct 1956 19:12:00.000000		12.2509.550
MNR J Munson612436627.500000
28 Feb 1959 00:00:00.000000		2438307.500000
5 Oct 1963 00:00:00.000000		13.13010.240
CNP J Conely102436942.700000
9 Jan 1960 04:48:00.000000		2437163.400000
16 Aug 1960 21:36:00.000000		12.15010.390
SFR C I Shinkfield362437400.000000
10 Apr 1961 12:00:00.000000		2439352.900000
15 Aug 1966 09:36:00.000000		12.2809.850
LVR J Livesey462437708.700000
13 Feb 1962 04:48:00.000000		2438592.500000
16 Jul 1964 00:00:00.000000		12.28010.540
FEE S Farr12437779.400000
24 Apr 1962 21:36:00.000000		2437779.400000
24 Apr 1962 21:36:00.000000		10.88010.880
CUR F Churchhouse52437838.500000
23 Jun 1962 00:00:00.000000		2437880.400000
3 Aug 1962 21:36:00.000000		12.43010.880
CHR H Chambers532438516.500000
1 May 1964 00:00:00.000000		2447358.434000
15 Jul 1988 22:24:57.600000		12.76010.100
HOA J Hollis672438892.400000
11 May 1965 21:36:00.000000		2443777.300000
25 Sep 1978 19:12:00.000000		12.3409.950
SPG H Spalding472439561.500000
12 Mar 1967 00:00:00.000000		2443291.400000
27 May 1977 21:36:00.000000		12.2809.120
PIR D Pickard1042439989.400000
12 May 1968 21:36:00.000000		2451030.415200
4 Aug 1998 21:57:53.280000		13.10010.010
ISJ E Isles352440036.500000
29 Jun 1968 00:00:00.000000		2447442.194400
7 Oct 1988 16:39:56.160000		12.25010.540
KXO J Knox182441134.500000
2 Jul 1971 00:00:00.000000		2441252.300000
27 Oct 1971 19:12:00.000000		11.59010.360
HIG P Hawkins182441619.300000
28 Oct 1972 19:12:00.000000		2442007.800000
21 Nov 1973 07:12:00.000000		12.85010.650
PTR A H Paterson1902441713.600000
31 Jan 1973 02:24:00.000000		2459345.429000
10 May 2021 22:17:45.600000		13.20010.000
MWW Morris42441767.500000
26 Mar 1973 00:00:00.000000		2441809.500000
7 May 1973 00:00:00.000000		12.27011.310
BPJ A Bailey502441795.400000
22 Apr 1973 21:36:00.000000		2442872.500000
4 Apr 1976 00:00:00.000000		13.23010.100
GXD Griffin672441807.500000
5 May 1973 00:00:00.000000		2442889.500000
21 Apr 1976 00:00:00.000000		12.66010.340
HYP W Hornby82441807.500000
5 May 1973 00:00:00.000000		2442194.500000
27 May 1974 00:00:00.000000		11.85010.660
HFG M Hurst22441809.400000
6 May 1973 21:36:00.000000		2441904.400000
9 Aug 1973 21:36:00.000000		11.23011.180
HHI D Howarth52441809.500000
7 May 1973 00:00:00.000000		2441872.500000
9 Jul 1973 00:00:00.000000		11.90010.800
PCC Pezzarossa112441829.400000
26 May 1973 21:36:00.000000		2441953.300000
27 Sep 1973 19:12:00.000000		12.20010.540
MYA Maudsley522441834.500000
1 Jun 1973 00:00:00.000000		2443330.400000
5 Jul 1977 21:36:00.000000		11.92010.320
SWD R B Saw932441895.400000
31 Jul 1973 21:36:00.000000		2444905.300000
27 Oct 1981 19:12:00.000000		12.91010.100
ADS J Anderson122441910.400000
15 Aug 1973 21:36:00.000000		2442649.400000
24 Aug 1975 21:36:00.000000		11.19010.100
BTG K Broadbent722442067.600000
20 Jan 1974 02:24:00.000000		2443048.300000
26 Sep 1976 19:12:00.000000		12.98010.340
RTD A Rothery62442109.700000
3 Mar 1974 04:48:00.000000		2442661.400000
5 Sep 1975 21:36:00.000000		12.60010.540
IHG Hirst532442154.400000
16 Apr 1974 21:36:00.000000		2443785.300000
3 Oct 1978 19:12:00.000000		13.0209.660
SRR Steer12442159.400000
21 Apr 1974 21:36:00.000000		2442159.400000
21 Apr 1974 21:36:00.000000		11.95011.950
SQM Shallis32442186.500000
19 May 1974 00:00:00.000000		2442212.500000
14 Jun 1974 00:00:00.000000		11.18010.810
WSE J W West12442194.500000
27 May 1974 00:00:00.000000		2442194.500000
27 May 1974 00:00:00.000000		10.82010.820
TLS Taylor72442247.400000
18 Jul 1974 21:36:00.000000		2442301.400000
10 Sep 1974 21:36:00.000000		10.99010.360
POA K Porter12442461.500000
18 Feb 1975 00:00:00.000000		2442461.500000
18 Feb 1975 00:00:00.000000		10.59010.590
WVP B Withers1472442488.500000
17 Mar 1975 00:00:00.000000		2445519.400000
3 Jul 1983 21:36:00.000000		12.98010.050
KDB Kennedy22442532.400000
29 Apr 1975 21:36:00.000000		2442536.400000
3 May 1975 21:36:00.000000		12.78011.950
MXL R Matthews12442544.400000
11 May 1975 21:36:00.000000		2442544.400000
11 May 1975 21:36:00.000000		12.52012.520
LCD Churchill12442592.500000
29 Jun 1975 00:00:00.000000		2442592.500000
29 Jun 1975 00:00:00.000000		10.65010.650
XCA Connell92442873.500000
5 Apr 1976 00:00:00.000000		2442932.500000
3 Jun 1976 00:00:00.000000		12.40010.840
GJR J Godden552442909.500000
11 May 1976 00:00:00.000000		2445107.500000
18 May 1982 00:00:00.000000		12.36010.240
GCG A V Coady862443247.500000
14 Apr 1977 00:00:00.000000		2449716.597200
30 Dec 1994 02:19:58.080000		12.52010.100
JLM L Joslin112443253.400000
19 Apr 1977 21:36:00.000000		2443400.300000
13 Sep 1977 19:12:00.000000		12.1209.950
OOA Snook312443260.400000
26 Apr 1977 21:36:00.000000		2444137.400000
20 Sep 1979 21:36:00.000000		12.49010.390
GVA Cosgrove42443291.500000
28 May 1977 00:00:00.000000		2443327.500000
3 Jul 1977 00:00:00.000000		12.19010.570
RHFR B I Fraser52443316.500000
22 Jun 1977 00:00:00.000000		2443988.400000
24 Apr 1979 21:36:00.000000		11.86010.720
GHT Gough52443525.800000
17 Jan 1978 07:12:00.000000		2443908.700000
4 Feb 1979 04:48:00.000000		12.36010.560
KJS J Kay762443838.700000
26 Nov 1978 04:48:00.000000		2444937.700000
29 Nov 1981 04:48:00.000000		12.52010.100
NRR H Mcnaught12443872.800000
30 Dec 1978 07:12:00.000000		2443872.800000
30 Dec 1978 07:12:00.000000		10.24010.240
KSN S Kiernan582443933.600000
1 Mar 1979 02:24:00.000000		2445913.410400
31 Jul 1984 21:50:58.560000		11.95010.440
XGG Poyner2132444334.400000
4 Apr 1980 21:36:00.000000		2450592.441600
23 May 1997 22:35:54.240000		13.05010.100
XFL J Higgins212444336.400000
6 Apr 1980 21:36:00.000000		2444765.500000
10 Jun 1981 00:00:00.000000		12.28010.440
TUR J Stuart222444616.700000
12 Jan 1981 04:48:00.000000		2445583.400000
5 Sep 1983 21:36:00.000000		12.06010.540
WHP J Wheeler492444733.500000
9 May 1981 00:00:00.000000		2447775.384000
5 Sep 1989 21:12:57.600000		11.9509.950
RQK Robinson52445074.500000
15 Apr 1982 00:00:00.000000		2445087.500000
28 Apr 1982 00:00:00.000000		10.76010.390
OWJ J Howarth1812445092.500000
3 May 1982 00:00:00.000000		2448388.468700
11 May 1991 23:14:55.680000		12.44010.440
EJJ W L Ells12445409.400000
15 Mar 1983 21:36:00.000000		2445409.400000
15 Mar 1983 21:36:00.000000		11.31011.310
ULS J Lubbock1302445703.753400
4 Jan 1984 06:04:53.760000		2447302.443000
20 May 1988 22:37:55.200000		12.38010.140
URP C Burgess62445811.407600
20 Apr 1984 21:46:56.640000		2445866.420100
14 Jun 1984 22:04:56.640000		11.89010.880
ZKM A Brookes112446120.586800
24 Feb 1985 02:04:59.520000		2446283.427700
5 Aug 1985 22:15:53.280000		12.28010.030
HDII Howard-Duff52446164.475600
8 Apr 1985 23:24:51.840000		2446326.354100
17 Sep 1985 20:29:54.240000		11.63010.760
NCM J Nicholls802446170.420100
14 Apr 1985 22:04:56.640000		2448537.291600
7 Oct 1991 18:59:54.240000		12.28010.390
KVA Kimber92446521.371500
31 Mar 1986 20:54:57.600000		2446682.350000
8 Sep 1986 20:24:00.000000		11.19010.320
AGS W Albrighton172446798.725600
3 Jan 1987 05:24:51.840000		2449845.461800
7 May 1995 23:04:59.520000		12.66010.390
GDM J Gainsford6572446851.516600
25 Feb 1987 00:23:54.240000		2458227.392000
18 Apr 2018 21:24:28.800000		12.9609.620
DTD Stott1302446895.384700
9 Apr 1987 21:13:58.080000		2448038.395100
26 May 1990 21:28:56.640000		12.52010.140
TJJ Toone1,0372446107.731000
11 Feb 1985 05:32:38.400000		2460425.424000
24 Apr 2024 22:10:33.600000		13.0209.670
VTL R Stevens162447264.500600
13 Apr 1988 00:00:51.840000		2447642.450600
25 Apr 1989 22:48:51.840000		12.28010.390
EJDE G D Youngs22447391.400600
17 Aug 1988 21:36:51.840000		2447740.416600
1 Aug 1989 21:59:54.240000		11.95011.630
MMI A Middlemist162447615.437500
29 Mar 1989 22:30:00.000000		2448087.461800
14 Jul 1990 23:04:59.520000		12.35010.240
CPJC P Jones1032447653.429800
6 May 1989 22:18:54.720000		2452552.284000
4 Oct 2002 18:48:57.600000		12.9809.950
PMMP Madhu Menon12447982.277000
31 Mar 1990 18:38:52.800000		2447982.277000
31 Mar 1990 18:38:52.800000		10.99010.990
DRR C Dryden4862448255.750000
30 Dec 1990 06:00:00.000000		2460286.740000
8 Dec 2023 05:45:36.000000		12.8609.750
BHGB H Granslo282450665.420000
4 Aug 1997 22:04:48.000000		2451303.510000
5 May 1999 00:14:24.000000		12.40010.300
HWMH W McGee1292450986.467300
21 Jun 1998 23:12:54.720000		2453087.490300
22 Mar 2004 23:46:01.920000		14.40010.390
ADGA D Godden22451645.409700
10 Apr 2000 21:49:58.080000		2451662.451300
27 Apr 2000 22:49:52.320000		11.71010.990
BCPC D Beech102454599.543800
13 May 2008 01:03:04.320000		2455310.542400
24 Apr 2010 01:01:03.360000		11.70010.600
BJB J Beesley512454572.657600
16 Apr 2008 03:46:56.640000		2455525.749300
25 Nov 2010 05:58:59.520000		12.20010.800
VST G Saville12455420.399300
11 Aug 2010 21:34:59.520000		2455420.399300
11 Aug 2010 21:34:59.520000		11.30011.300
HULV Hull232456402.623000
20 Apr 2013 02:57:07.200000		2457513.563800
5 May 2016 01:31:52.320000		11.80010.400
KCC Knight22456457.874000
14 Jun 2013 08:58:33.600000		2456472.811000
29 Jun 2013 07:27:50.400000		12.00011.800
RPER Pearce972456773.468000
25 Apr 2014 23:13:55.200000		2460151.444000
25 Jul 2023 22:39:21.600000		12.8008.900
BAXJ Baxendell2432407787.500000
13 Mar 1880 00:00:00.000000		2411893.500000
10 Jun 1891 00:00:00.000000		13.5009.000
TVAT Vale162457133.460000
20 Apr 2015 23:02:24.000000		2458574.482000
31 Mar 2019 23:34:04.800000		12.60010.600
XXX42420202.500000
11 Mar 1914 00:00:00.000000		2420462.500000
26 Nov 1914 00:00:00.000000		12.4009.000
GPFG Fleming22458595.375820
21 Apr 2019 21:01:10.848000		2458616.436600
12 May 2019 22:28:42.240000		11.03710.785
IWTI L Walton32459323.406850
18 Apr 2021 21:45:51.840000		2460339.707460
30 Jan 2024 04:58:44.544000		11.40610.995