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Variable objects in Orion

Lightcurves: C-LC = Current or Recent, P-LC = 'Pixel' Long-term, A-LC = from Articles, O-LC = Others.
Magnitude ranges are the extreme observed limits.

U Orionis | SPA VSS programme
Type: M | P-LC | O-LC
Period: 368d
Coords: (2000) 05h55.8m +2011'
Magnitude range: 5.03 to 13.10
Sequence chart: 059.01
Total observations: 12550

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1890..         29         2   21   11                  18
1900..    69   52   66   41   24   48   85   96   76  102
1910..    46   44   57   97  141  108   93  115  136  107
1920..   103  111  106  140  199  156  196  170  211  248
1930..   231  286  254  214  216  150  162  182  258  156
1940..   149   49   24   62   77   82  128   33   99   37
1950..    60   68   72   47   64   78   67   43   37   66
1960..    47   58   33   42  105   88   53  173  207  158
1970..   143  161  133  233  164  129   85   76  172  141
1980..   144  210  174  200  199  209  272  269  241  197
1990..   124   88   89  118  160  145  111   73  157  108
2000..    86

W Orionis
Type: SRB
Period: 212d
Coords: (2000) 05h05.4m +0111'
Magnitude range: 5.50 to 7.80
Sequence chart: 105.01 | @
Total observations: 1633

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..         59   40
1980..         49   76   67   76   91  129  124   96   84
1990..   104   65   61   67   94   84   30        97   88
2000..    52

BI Orionis
Type: UGZ
Period: 20.5d?
Coords: (2000) 05h23m52s +0100'30"
Magnitude range: 14.20 to 14.20
Total observations: 3

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                                  1
2000..     2

BL Orionis
Type: LB
Coords: (2000) 06h25.5m +1443'
Magnitude range: 5.71 to 7.24
Sequence chart: MDT831003
Total observations: 1622

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..         85   75
1980..         11   21   67  114  123  138  114   77   81
1990..    90   67   38   65  122   99   33   16   80   70
2000..    36

BQ Orionis
Type: SR | P-LC
Period: 110d
Coords: (2000) 05h57.1m +2250'
Magnitude range: 6.95 to 9.20
Sequence chart: MDT840412
Total observations: 2142

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..         51   30
1980..         86   88  124  121  116  124  136  141  143
1990..   118  101   66   96  102  126   35   19  113  142
2000..    64

CK Orionis
Type: SR?
Period: 120d?
Coords: (2000) 05h30.3m +0412'
Magnitude range: 5.90 to 7.10
Sequence chart: 221.01 | @
Total observations: 2171

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..         94   54   51   39   30   17   25   25   42
1980..    33   34   54   75   89  103  141  154  102  106
1990..    94   99   69   93  136  109   45   15   91   92
2000..    60

CN Orionis
Type: UGZ | C-LC | P-LC
Period: 16d
Coords: (2000) 05h52.1m -0525'
Magnitude range: 11.42 to 15.29
Sequence chart: 012.02/01
Total observations: 4622

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1960..                   17   19   25   23   55   30   36
1970..    50   68   76  213  108  102   79   22   68  127
1980..   173  135  132  182  151  156  252  282  313  217
1990..   162  140   82  119  140  150   88  128  130  202
2000..   170

CZ Orionis
Type: UGSS | C-LC | P-LC
Period: 26d
Coords: (2000) 06h16m43s +1524'11"
Magnitude range: 10.90 to 15.90
Sequence chart: 013.02/01
Total observations: 7068

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..          2
1980..                  237  218  241  284  492  688  556
1990..   445  447  325  405  435  428  288  451  414  461
2000..   251

ER Orionis
Type: EW
Period: .42d
Coords: (2000) 05h11.2m -0833'
Magnitude range: 9.20 to 10.05
Sequence chart: JEI8711
Total observations: 110

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                  55   33        22

FU Orionis
Type: FUOri
Coords: (2000) 05h45m22s +0904'09"
Magnitude range: 9.40 to 9.70
Total observations: 34

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                       15   10    2
2000..     7

KX Orionis
Type: INA
Coords: (2000) 05h35m05s -0443'53"
Magnitude range: 6.80 to 7.20
Total observations: 7

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                                  7

NU Orionis
Type: INSA
Coords: (2000) 05h35m32s -0516'01"
Magnitude range: 7.40 to 7.60
Sequence chart: Burnhams p1333
Total observations: 80

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                   3   13   22   27
2000..    15

V344 Orionis
Type: UGZ
Coords: (2000) 06h15m19s +1530.6'
Magnitude range: 14.00 to [14.90
Sequence chart: TA880530
Total observations: 165

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                             11   26   40   29   29
2000..    30

V372 Orionis
Type: not listed
Coords: (2000) 05h34m47s -0534'16"
Magnitude range: 8.00 to 8.20
Total observations: 8

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                                  8

V530 Orionis
Type: EA
Period: 6.11d
Coords: (2000) 06h04.6m -0312'
Magnitude range: 10.00 to 10.00
Sequence chart: JEI8711
Total observations: 3

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                        3

V650 Orionis
Type: UG?
Coords: (2000) 05h31m08s +0945.9'
Magnitude range: ? to [15.30
Total observations: 139

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                             12   22   35   21   25
2000..    24

V1159 Orionis | Report on the Warner Symposium on CVs
Type: UGSU | C-LC
Coords: (2000) 05h28m59s -0333'51"
Magnitude range: 12.20 to 15.30
Sequence chart: TA950223
Total observations: 386

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                             34   41   68   49   90
2000..   104

NSV2917 Orionis (BD+14 1247)
Type: LC
Coords: (2000) 06h16.8m +1359'
Magnitude range: 5.31 to 6.72
Sequence chart: MDT831003
Total observations: 202

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1970..         57   70
1990..                        47   23                   3
2000..     2

TASV0534+10 Orionis (Q1990/92)
Type: not listed
Coords: (1950) 05h34.2m +1025'
Magnitude range: 9.00 to 9.00
Total observations: 1

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                                  1

TAV0559+06 Orionis (Q1991/9)
Type: not listed
Coords: (2000) 06h01.7m +0638'
Magnitude range: 12.30 to 12.30
Total observations: 4

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1990..                                                  4

alpha Orionis (Betelgeuse) | Variable Star Spectra Compared | SPA VSS programme
Type: SRC
Period: 2335d
Coords: (2000) 05h55m10s +0724'25"
Magnitude range: -.40 to 1.22
Sequence chart: SPA-TM
Total observations: 3061

Annual
totals   ++0  ++1  ++2  ++3  ++4  ++5  ++6  ++7  ++8  ++9
1890..                    4    8   13    3
1970..   255  126  109  159   54   35   20   13   15   16
1980..    41   63   58   78   78  136  237  232  206   89
1990..    86  108  123  118  128   82   85   80   89   98
2000..    16


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