O-C DIAGRAMS AND UP-TO-DATE LINEAR
ELEMENTS OF ECLIPSING BINARIES

Heliocentric orbital phase is calculated based on YOUR COMPUTER TIME !!!!

When using this database please include a citation to: J.M. Kreiner, 2004, Acta Astronomica, vol. 54, pp 207-210.

Lac

From GCVS:
Nr.GCVS STAR  CONST.   RA   (2000)    DEC         Type   V [mag]     P [days]          Spec            
========================================================================================================
450012   RT     Lac   22h  1m 30.7s   43o 53' 25"    |EB/A   |  8.84       5.0739496      |G9IV+K1IV     
450015   RW     Lac   22h 44m 57.1s   49o 39' 27"    |EA/D   | 10.4       10.36922       *|F2            
450019   SS     Lac   22h  4m 41.5s   46o 25' 38"    |EA/D   | 10.1       14.41629        |B7            
450023   SW     Lac   22h 53m 41.7s   37o 56' 18"    |EW/K   |  8.51       0.3207209      |G8Vp+G8Vp     
450030   TW     Lac   22h 30m 26.3s   54o 37'  6"    |EA/S   | 11.5        3.037417       |A2            
450033   TZ     Lac   22h 14m 12.3s   49o 56' 18"    |EA/S   | 13.9        2.875086      *|              
450036   UW     Lac   22h 20m 39.8s   42o 24' 28"    |EA/S   | 11.4        5.29023        |A             
450038   UY     Lac   22h 25m 51.8s   46o 11' 27"    |EA/D   | 12.3       11.4489         |              
450040   VV     Lac   22h 29m 54.8s   52o 28' 55"    |EA/S   | 13.9        3.4547         |              
450042   VX     Lac   22h 41m  0.6s   38o 19' 20"    |EA/S   | 10.9        1.0744942     *|F0            
450043   VY     Lac   22h 49m 59.1s   45o  0' 16"    |EB/K   | 10.2        1.03625        |A2            
450049   XX     Lac   22h 17m 10.2s   50o  1' 11"    |EA     | 14.6                       |              
450054   ZZ     Lac   22h 22m 23.2s   51o 33'  4"    |E      | 13.6        2.889          |              
450057   AC     Lac   22h 25m 13.6s   51o 18' 29"    |EA/S   | 14.7        1.6192         |              
450059   AE     Lac   22h 26m  8.1s   51o 19' 35"    |EA/S   | 14.2        1.4207         |              
450061   AG     Lac   22h 27m 18.7s   52o 23'  4"    |EB/S   | 13.6        0.75218        |              
450063   AI     Lac   22h 33m 52.9s   50o 39' 31"    |EA     | 13.7        2.80832        |              
450064   AK     Lac   22h 36m 28.9s   52o 38' 29"    |EA     | 12.8       18.435          |              
450071   AR     Lac   22h  8m 40.8s   45o 44' 32"    |EA/A   |  6.08       1.98319204     |G2IV-V+K0IV   
450074   AU     Lac   22h 15m 17.1s   48o 43' 16"    |EA/S   | 12.0        1.392441      *|A             
450076   AW     Lac   22h 17m 57.9s   54o 28'  2"    |EB/K   | 10.6        1.1428498      |A0            
450077   AX     Lac   22h 21m 26.9s   49o 23' 38"    |EA     | 15.0        3.4778         |              
450080   BB     Lac   22h 28m 38.4s   47o 58' 13"    |EA/S   | 13.0        3.86596        |A0            
450093   BP     Lac   22h 15m 28.6s   44o 45' 19"    |EA     | 15.0        2.04568        |              
450096   BS     Lac   22h 19m 37.3s   44o 17'  3"    |EA/S   | 13.5        2.81420       *|              
450100   BW     Lac   22h 32m 35.0s   48o 25' 43"    |EA/D   | 13.8       12.1080        *|              
450107   CF     Lac   22h 44m  6.8s   47o 30' 34"    |EA/S   | 13.5        4.707666      *|              
450108   CG     Lac   22h 44m 57.1s   49o  6' 38"    |EA/S   | 13.9        0.8193938      |              
450113   CM     Lac   22h  0m  4.4s   44o 33'  7"    |EA/D   |  8.18       1.6046916     *|A2V+A8V       
450114   CN     Lac   22h  6m  8.5s   46o 18' 35"    |EB/D   | 12.4        0.6373744      |G3            
450115   CO     Lac   22h 46m 30.0s   56o 49' 31"    |EA/D   | 10.28       1.5422075     *|B8.5IV+B9.5V  
450119   CS     Lac   21h 59m 42.7s   42o 34' 15"    |EB/D   |  9.3        3.797807       |B5V           
450125   CY     Lac   22h 13m  8.7s   54o 33' 34"    |EA/D   | 11.5        2.78694       *|B5            
450130   DG     Lac   22h 28m 49.9s   53o 46' 15"    |EA/S   | 10.8        2.206534      *|A5            
450147   DY     Lac   22h 47m 19.3s   53o 59'  6"    |EA/S   | 14.6        2.791113       |              
450152   EH     Lac   22h 51m 55.6s   51o 25' 14"    |EA     | 13.6                       |              
450154   EK     Lac   22h  4m 49.8s   49o 40' 11"    |EA/K   | 11.2        1.537316      *|A1            
450155   EL     Lac   22h  8m 53.7s   42o 16' 21"    |EA/S   | 12.4        2.806792      *|              
450156   EM     Lac   22h 23m 54.8s   54o  1'  9"    |EW/K   | 12.50       0.38913342     |F             
450158   EO     Lac   22h 25m 12.2s   55o 12' 30"    |EA/S   | 12.7        4.575297      *|A0            
450159   EP     Lac   22h 27m 34.4s   54o 25' 36"    |EA/S   | 12.4        2.0558257     *|B9            
450160   EQ     Lac   22h 12m  8.8s   48o 43' 43"    |EA/S   | 13.0        2.603647       |              
450161   ER     Lac   22h 19m  3.2s   51o 41'  9"    |EA/S   | 14.0        2.945451      *|              
450162   ES     Lac   22h 32m  6.3s   53o 57' 32"    |EA/D   | 11.0        4.459349       |A2            
450164   EU     Lac   22h 25m 31.9s   51o 43' 38"    |EA/D   | 12.1        2.332488      *|A0            
450167   EX     Lac   22h 41m  3.7s   52o 27' 41"    |EA/S   | 13.6        1.739293       |              
450168   EY     Lac   22h 41m 48.3s   54o 24' 24"    |EA     | 13.8        2.277862       |              
450169   EZ     Lac   22h 42m 42.3s   50o 58' 37"    |EA     | 14.3        2.790814      *|              
450173   FI     Lac   22h 45m  3.8s   55o 32' 22"    |EA     | 13.0        4.257945       |              
450174   FK     Lac   22h 46m 33.6s   52o  9' 28"    |EA/D   | 13.0       10.98114        |              
450175   FL     Lac   22h 49m 50.3s   51o 15' 48"    |EA     | 12.9        1.107323      *|              
450179   FP     Lac   22h 53m 43.9s   50o 52' 40"    |EA     | 13.1        4.480083      *|              
450181   FR     Lac   22h 48m 57.9s   54o 12' 35"    |EA     | 15.2                       |              
450183   FT     Lac   22h 54m 27.6s   48o 25' 57"    |E      | 13.9                       |              
450184   FU     Lac   22h  0m 26.7s   43o 51' 19"    |EA     | 15.8        2.289082       |              
450187   FX     Lac   22h 24m 25.4s   46o  8' 50"    |EA/S   | 14.4        1.42789       *|              
450191   GH     Lac   22h 39m 36.2s   47o 17' 48"    |EA     | 14.3        0.532645      *|              
450197   GO     Lac   22h 11m  6.1s   47o 37' 15"    |EA     | 15.                        |              
450201   GS     Lac   22h 26m 20.2s   53o 16' 15"    |EA/S   | 15.1        1.6771710     *|              
450202   GT     Lac   22h 30m 30.0s   45o 49' 41"    |EA     | 15.5                       |              
450205   GW     Lac   22h 45m 41.7s   53o 14' 33"    |EA     | 15.                        |              
450206   GX     Lac   22h 46m 16.8s   56o 51'  7"    |EA/D   | 10.1        6.3552563      |B8            
450208   GZ     Lac   22h 56m 39.2s   53o 48' 26"    |EA     | 15.                        |              
450210   HI     Lac   22h 56m 48.7s   53o 47' 47"    |EA     | 15.                        |              
450214   HN     Lac   22h  3m 15.6s   52o 20' 28"    |EA/K   | 14.3        1.4098913      |              
450218   HR     Lac   22h  4m 53.8s   50o 40' 39"    |EW/K   | 13.9        0.4290721      |              
450223   HW     Lac   22h  5m 42.3s   51o 53' 40"    |EA     | 14.7        2.0307782     *|              
450224   HX     Lac   22h  6m  8.3s   49o 31' 48"    |EW     | 14.2        0.5274659      |              
450226   HZ     Lac   22h  6m  5.2s   51o 11' 47"    |EB/K   | 14.4        1.2951389      |              
450229   IL     Lac   22h  6m 47.1s   52o  9'  8"    |E      | 12.5                       |A2            
450230   IM     Lac   22h  7m 14.4s   52o 14' 16"    |EB/K   | 12.9        1.2683480      |A1            
450233   IP     Lac   22h  8m  8.7s   51o 36' 11"    |EA     | 13.2        0.8520105      |              
450235   IR     Lac   22h  8m 49.2s   52o 50' 40"    |EA     | 15.2        0.6515045      |              
450238   IU     Lac   22h  9m 27.3s   52o 35' 39"    |EB/K   | 13.4        0.9690576      |A             
450243   IZ     Lac   22h 13m  5.6s   51o 49' 27"    |EB/K   | 12.5        0.798878       |A3            
450245   KL     Lac   22h 13m 41.2s   55o 10' 25"    |EA     | 15.5        2.829015       |              
450248   KO     Lac   22h 14m 31.0s   53o 28' 58"    |EA/S   | 14.6        1.0260728     *|              
450251   KR     Lac   22h 15m 42.1s   51o  3' 57"    |EB     | 15.4        0.9376954      |              
450252   KS     Lac   22h 15m 56.2s   55o 26' 44"    |EA/D   | 14.0        4.006307      *|              
450254   KU     Lac   22h 17m  1.7s   55o 10' 38"    |EA     | 14.0        4.67258       *|              
450258   KY     Lac   22h 18m 44.3s   50o 25' 14"    |EA     | 12.8       15.42780        |A-F           
450269   LU     Lac   22h 21m 42.5s   51o 22'  2"    |EW/K   | 14.6        0.29880135     |              
450270   LV     Lac   22h 21m 43.5s   53o  1' 31"    |EA/D   | 14.9       13.17027       *|              
450271   LW     Lac   22h 22m  5.2s   51o 13' 14"    |EA/D   | 14.0       14.3963         |              
450273   LY     Lac   22h 22m  4.9s   55o  7' 35"    |EA/K   | 12.5        1.5451538     *|A0            
450274   LZ     Lac   22h 22m 21.4s   55o 23' 39"    |EB/K   | 12.1        1.2507007      |A0            
450277   MO     Lac   22h 23m 41.3s   52o 44' 13"    |EA     | 16.3        5.014489       |              
450278   MP     Lac   22h 23m 49.0s   49o 58' 31"    |EA/D   | 12.3       31.3957        *|F8            
450285   MW     Lac   22h 26m 45.5s   55o 50'  4"    |EA/D   | 13.1        2.7981644     *|A2            
450288   MZ     Lac   22h 28m  1.7s   53o 41'  0"    |EA     | 11.2        3.158795      *|A0            
450289   NN     Lac   22h 28m 12.6s   53o 13'  5"    |EA     | 13.4       15.71889        |              
450293   NR     Lac   22h 29m 20.9s   49o 42'  8"    |EB     | 13.2        0.6048038      |              
450294   NS     Lac   22h 29m 29.8s   49o 59' 51"    |EA     | 14.1        1.0155663      |              
450298   NW     Lac   22h 31m 39.2s   55o 24' 22"    |EA/K   | 13.7        1.5109772     *|              
450302   OO     Lac   22h 33m 20.5s   56o  8' 55"    |EB/S   | 12.5        1.755936       |B7            
450303   OP     Lac   22h 34m 28.7s   55o 30' 54"    |EA     | 14.2        3.393030      *|              
450306   OS     Lac   22h 36m 27.5s   52o 22' 39"    |EA     | 13.4        1.4443624     *|A             
450307   OT     Lac   22h 36m 44.7s   56o 44'  7"    |E      | 11.2                       |B5            
450311   OX     Lac   22h 40m 59.1s   50o 45' 28"    |EB/D   | 10.7        5.5337615      |B9            
450312   OY     Lac   22h 41m 30.9s   56o 12'  0"    |EA     | 14.5        6.608010      *|              
450313   OZ     Lac   22h 41m 49.6s   56o 16' 34"    |E      | 13.3                       |              
450314   PP     Lac   22h 42m 38.7s   53o 25'  2"    |EW/K   | 11.1        0.401163       |              
450316   PR     Lac   22h  4m 20.0s   49o 53' 59"    |EA     | 14.8        2.5830597     *|              
450336   V0336  Lac   22h 37m 55.2s   55o 14' 32"    |EA     | 14.2       44.6068         |              
450339   V0339  Lac   22h 11m 59.3s   53o  0' 45"    |EA     | 12.9        1.7042482     *|              
450340   V0340  Lac   22h 12m 44.5s   54o 11'  9"    |EA/D   | 11.8       19.943265      *|              
450342   V0342  Lac   22h 14m  0.2s   51o 56' 31"    |EW     | 12.4        0.7005779      |              
450343   V0343  Lac   22h 15m 58.4s   53o 18' 43"    |EA/S   | 11.3        6.471914      *|A0            
450344   V0344  Lac   22h 18m 46.9s   51o 59' 15"    |EW/K   | 12.2        0.39222768     |A3            
450345   V0345  Lac   22h 18m 43.3s   54o 40' 33"    |EA/D   | 11.1        7.491862      *|B8            
450364   V0364  Lac   22h 52m 14.8s   38o 44' 44"    |EA/D   |  8.51       7.351522       |A3            
450368   V0368  Lac   22h 13m 38.0s   44o 56' 48"    |EA/S   | 15.1                       |              
450371   V0371  Lac   22h 30m 44.3s   47o 17' 57"    |EA/S   | 15.1                       |              
450394   V0394  Lac   22h  3m 25.1s   48o 41'  2"    |EB     |  8.04                      |              
450398   V0398  Lac   22h  7m 12.4s   52o 38'  8"    |EA     |  8.73                      |              
450401   V0401  Lac   22h  8m 21.3s   49o 13' 15"    |EA     |  7.93                      |              
450402   V0402  Lac   22h  9m 15.2s   44o 50' 47"    |EA     |  6.70                      |              
450407   V0407  Lac   22h 24m 36.9s   41o 18' 23"    |ELL    |  8.31                      |              
450427   V0427  Lac   22h 19m 12.4s   49o 20'  6"    |EA     | 14.8                       |              
450430   V0430  Lac   22h 26m 50.4s   44o 41' 13"    |EA     | 14.2                       |              
450431   V0431  Lac   22h 31m  3.7s   47o 13' 41"    |EA     | 14.3                       |              
450441   V0441  Lac   22h  9m 37.4s   52o 34' 15"    |EW     | 12.2                       |              
450453   V0453  Lac   21h 57m 32.7s   44o 10' 20"    |EA/S   | 14.5        4.65132       *|              
450455   V0455  Lac   22h 10m 50.5s   50o 19' 36"    |EA     | 12.44       1.9881         |              
450456   V0456  Lac   22h 13m 50.0s   43o 54' 38"    |EA     | 12.49       3.1875         |              
450457   V0457  Lac   22h 36m 23.0s   38o  6' 18"    |EA     |  9.84       6.15727        |B9V           
450458   V0458  Lac   22h 48m 55.9s   45o 45'  8"    |EA     | 12.52       1.34795        |              
450459   V0459  Lac   22h 50m 54.5s   48o 39' 24"    |EA     | 13.06       1.7679         |              
450467   V0467  Lac   22h 22m 48.0s   52o 58' 49"    |EA     | 14.22       2.8610         |              
450474   V0474  Lac   22h 45m 58.7s   56o 28' 32"    |EB     | 12.25       0.7655         |              
450476   V0476  Lac   22h 49m 18.1s   52o 26' 35"    |EA     | 10.30      17.915          |              
450479   V0479  Lac   22h 52m 50.7s   35o 58' 56"    |EW     | 12.2        0.34575        |              
450482   V0482  Lac   22h  2m 10.6s   44o  1' 22"    |EW     | 11.78       0.3765         |              
450485   V0485  Lac   22h 14m 17.9s   51o 48'  6"    |EW     | 13.16       0.5792332      |              
450486   V0486  Lac   22h 14m 18.7s   51o 42' 55"    |EW     | 12.37       0.2407040      |              
450487   V0487  Lac   22h 15m 46.3s   48o 39'  5"    |EW     | 10.10       0.3466         |              
450488   V0488  Lac   22h 19m 19.1s   51o 39' 35"    |EW     | 11.18       0.4848981      |              
450489   V0489  Lac   22h 22m 57.2s   51o 37'  0"    |EW     | 12.4        0.48529        |              
450505   V0505  Lac   22h 42m 47.7s   45o 21'  5"    |EW     | 10.00       0.326997       |G0            
450519   V0519  Lac   22h 44m 19.2s   37o 51' 51"    |EW     | 13.10       0.520461       |              
450525   V0525  Lac   22h 44m 41.4s   49o 52' 29"    |EW     | 13.67       0.325211       |              
450560   V0560  Lac   22h 48m 32.5s   50o 49' 34"    |EW     | 14.34       0.2722         |              
========================================================================================================