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

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

Diagrams are computed for an average ephemerides presented in left-bottom corner of picture.
For small number of data ephemerides for diagram is taken from literature.
Based of last trend on O-C daigrams, an linear ephemerides and current orbital phase is calculated based on YOUR COMPUTER TIME !!!! (If there is enough data after 1960).

Ori

And| Ant| Aps| Aqr| Aql| Ara| Ari| Aur| Boo| Cae| Cam| Cnc| CVn| CMa| CMi| Cap| Car| Cas| Cen| Cep| Cet| Cha| Cir| Com| Col| CrA| CrB| Crv| Crt| Cru| Cyg| Del| Dor| Dra| Equ| Eri| For| Gem| Gru| Her| Hor| Hya| Hyi| Ind| Lac| Leo| LMi| Lep| Lib| Lup| Lyn| Lyr| Men| Mic| Mon| Mus| Nor| Oct| Oph| Ori| Pav| Peg| Per| Phe| Pic| Psc| PsA| Pup| Pyx| Ret| Sge| Sgr| Sco| Scl| Sct| Ser| Sex| Tau| Tel| Tri| TrA| Tuc| UMa| UMi| Vel| Vir| Vol| Vul

From GCVS:
Nr.GCVS STAR  CONST.   RA   (2000)    DEC         Type   V [mag]     P [days]          Spec            
========================================================================================================
600009    Z      Ori    5h 55m 50.9s   13o 41' 42"   EA/DS     9.8        5.203265        B3              
600036    UW     Ori    5h 55m 52.9s   20o 10' 16"   EB/KE    11.1        1.0080525       B               
600040    VV     Ori    5h 33m 31.4s   -1o  9' 22"   EA/KE:    5.31       1.4853784       B1V+B7V         
600090    BM     Ori    5h 35m 16.1s   -5o 23'  7"   EA        7.90       6.470525        B2V+A7IV        
600116    CP     Ori    6h  7m  1.9s   17o 41' 58"   EA       11.1        5.32053         G0              
600117    CQ     Ori    6h 23m 34.8s   13o 56' 41"   EA       12.2        2.74016         F-G:            
600123    CW     Ori    6h 12m 26.2s   11o 44' 52"   EB/D     13.1        4.78505                         
600136    DN     Ori    6h  0m 28.4s   10o 13'  5"   EA/DS     9.8       12.96641         A2e+F5III       
600145    DW     Ori    6h  5m 38.4s   13o 59' 30"   E:       12.7                                        
600146    DX     Ori    6h  5m 44.8s    8o 20' 55"   EA/SD    13.5        4.2529                          
600148    DZ     Ori    6h  9m 30.9s   15o 39' 18"   EA/SD:   12.1        1.83614                         
600150    EF     Ori    6h 10m 29.5s   12o 51' 22"   EA       13.6        3.7012                          
600151    EG     Ori    6h 11m  7.1s   16o 19' 34"   EA/SD    12.6        1.163166                        
600152    EH     Ori    6h 11m 26.7s    9o 47' 17"   EA/SD:   13.3        1.51357                         
600160    EQ     Ori    4h 57m 14.5s   -3o 36'  5"   EA/SD    10.2        1.746057        A0:             
600161    ER     Ori    5h 11m 14.5s   -8o 33' 25"   EW/KW     9.28       0.4233987       F8V             
600162    ES     Ori    4h 53m 34.8s    5o 36' 46"   EA/DM    10.48       1.602           A2              
600163    ET     Ori    4h 55m 34.3s    1o 22' 50"   EA/SD    11.2        0.9509356       G3              
600166    EW     Ori    5h 20m  9.2s    2o  2' 40"   EA/D      9.90       6.9368515       G0              
600168    EY     Ori    5h 31m 18.4s   -5o 42' 14"   EA/D      9.43      16.787832        A7Vm            
600170    FF     Ori    5h 35m 11.3s    2o 56' 55"   EA/SD:   10.2        1.810524        A1              
600172    FH     Ori    5h 23m 18.6s    4o 15' 38"   EA/SD:   10.5        2.15116         A1              
600173    FI     Ori    6h 23m 27.4s   14o 32' 47"   EA       10.8        4.44815         F5              
600174    FK     Ori    5h  5m 33.1s    9o 20' 10"   EA/SD    11.8        1.947529        A2              
600175    FL     Ori    5h  7m 46.6s   -2o 44' 38"   EA/SD    11.4        1.550971        A3V             
600176    FM     Ori    5h  8m 54.4s   10o 33' 34"   EA/DS    11.3       22.145125        A5              
600178    FO     Ori    5h 28m  9.7s    3o 37' 23"   EA/DS:    9.5       18.80058         A3              
600181    FR     Ori    5h 51m  5.7s    9o 26' 38"   EB/SD:   11.0        0.88316217      A7              
600183    FT     Ori    6h 13m 58.1s   21o 25' 39"   EA/DM     9.1        3.1504148       A0              
600189    FZ     Ori    5h 41m 21.0s    2o 36' 23"   EW/KW    10.7        0.3999866       G0              
600190    GG     Ori    5h 43m 10.2s    0o 41' 15"   EA/DM    10.7        6.63147         A2              
600203    GU     Ori    6h 10m  4.6s   12o 49' 47"   EA       12.9                                        
600306    OS     Ori    5h 36m 20.8s    8o 49' 44"   EA/SD    11.5        2.383525        A0              
600328    QT     Ori    5h 47m  3.0s    5o 55'  4"   EA/SD    13.0        2.3143175                       
600330    QV     Ori    5h 50m  4.3s   19o 59' 23"   EA       13.7        1.748815                        
600341    V0341  Ori    6h  3m 37.3s   14o 42' 48"   EA/SD    14.8        2.391220                        
600343    V0343  Ori    6h  5m  0.3s   12o 33'  5"   EW/DW    10.5        0.8091260       F1              
600392    V0392  Ori    6h 11m 25.2s   18o 33'  0"   EA/KE:   10.9        0.659284        A5              
600449    V0449  Ori    5h 31m 16.1s   11o 25' 31"   INSB     15.24                       K-Me            
600504    V0504  Ori    5h 38m  9.5s   12o 32' 14"   EB/AR:   15.0        2.572514    :                   
600517    V0517  Ori    5h 42m 47.3s   11o  7' 11"   EA       12.9                                        
600519    V0519  Ori    5h 43m 51.1s    9o 17' 28"   EA/D     12.6        3.107540                        
600525    V0525  Ori    5h 50m 34.0s   10o 23' 43"   EB/D     14.4        2.081649                        
600530    V0530  Ori    6h  4m 33.8s   -3o 11' 52"   EA/D     10.6        6.110792        G0              
600536    V0536  Ori    5h 24m 54.6s    1o 58'  8"   EA/DM    10.4        3.163264        A2              
600640    V0640  Ori    5h 55m  0.5s   -9o 22' 14"   EA/SD    11.2        2.02074                         
600641    V0641  Ori    5h 57m 17.7s   14o  6' 16"   EB/KW    14.2        0.4508                          
600642    V0642  Ori    5h 59m 25.7s    9o 15' 29"   EA/DM     8.75       2.757240        A0              
600643    V0643  Ori    6h  7m  0.9s   -2o 54' 58"   EA/DS    10.7       52.415           G-K0            
600644    V0644  Ori    6h 14m  6.4s   18o 12' 21"   EA/SD    14.6        2.48153                         
600645    V0645  Ori    6h 15m 30.0s   15o 34' 27"   EA/SD    13.3        1.040442                        
600647    V0647  Ori    6h 20m 52.4s    3o  7' 52"   EW/DW    11.5        0.977566        G0              
600648    V0648  Ori    4h 52m 32.4s    6o 19' 36"   EA/DM    11.5        1.626468        A0              
600667    V0667  Ori    6h  9m  8.8s   16o 35'  8"   EB/SD    14.7        1.025042                        
600668    V0668  Ori    6h 11m 50.6s   19o 57' 14"   EA/D     14.5        2.045597                        
600962    V0962  Ori    5h 43m 45.6s    8o  8' 57"   EA/SD:   14.         1.89367                         
601016    V1016  Ori    5h 35m 15.8s   -5o 23' 14"   EA        6.72      65.43233         B0.5Vp          
601027    V1027  Ori    6h 12m  3.8s   14o 56'  2"   EA       10.5                        G5              
601028    V1028  Ori    6h 22m  4.2s   10o 53' 41"   EB        9.69       3.              B2IV            
601031    V1031  Ori    5h 47m 26.9s  -10o 31' 59"   EA/DM     6.02       3.4057          A4V             
601202    V1202  Ori    4h 56m  5.3s   10o  3'  9"   EA       11.88                                       
601353    V1353  Ori    5h 42m 57.8s    0o 42' 46"   EW       12.9                                        
601363    V1363  Ori    5h  7m  2.1s    0o 47' 33"   EW       10.35                                       
601371    V1371  Ori    5h 27m 59.1s   12o 54' 42"   EB        8.16                                       
601383    V1383  Ori    5h 55m 47.3s   -7o 38' 10"   EB        8.47                                       
601385    V1385  Ori    6h  1m 10.5s   19o 25' 14"   EB        7.47                                       
601387    V1387  Ori    6h  9m 25.2s   17o 11'  0"   EB        8.77                                       
601388    V1388  Ori    6h 10m 59.2s   11o 59' 42"   EA        7.41                                       
601626    V1626  Ori    6h  5m 20.1s   10o  4' 26"   E        11.57                                       
601633    V1633  Ori    6h 18m 56.2s    4o  9' 20"   EA       12.1                                        
601635    V1635  Ori    6h 24m 54.0s   10o 14'  5"   E        11.72                                       
601638    V1638  Ori    4h 53m 21.9s   -3o 22' 55"   EB       11.5                                        
601642    V1642  Ori    5h 29m 20.6s    0o 41' 28"   E        12.30                                       
601799    V1799  Ori    4h 47m 18.2s    6o 40' 56"   EW       12.9        0.29031                         
601801    V1801  Ori    5h  1m 38.0s    2o 54' 25"   EA/RS     8.91       4.14357         G3/G5V          
601811    V1811  Ori    5h 34m 12.4s    0o 24' 50"   EA        9.52       3.21472         A2              
601815    V1815  Ori    5h 37m 51.7s    8o 51' 32"   EA       11.95       5.5416                          
601824    V1824  Ori    6h 22m 59.9s   16o 39'  3"   EA       13.47       1.59290                         
601834    V1834  Ori    4h 54m 56.4s    8o 36'  0"   EA        6.85       1.51058         A2III           
601847    V1847  Ori    5h  8m 30.1s   11o 31' 45"   EW       12.7        0.342771                        
601848    V1848  Ori    5h  8m 36.4s    5o 12' 22"   EW       11.05       0.2663496                       
601851    V1851  Ori    5h 12m 44.9s   10o 15' 10"   EW       12.3        0.276945                        
601853    V1853  Ori    5h 13m  6.1s   15o 58' 12"   EW       11.80       0.383004                        
601865    V1865  Ori    5h 26m 20.2s   15o 37'  0"   EW       12.4        0.717380                        
601871    V1871  Ori    5h 28m 52.6s    6o 34'  4"   EA:      12.45      11.660                           
602259    V2259  Ori    5h 35m 14.4s   -5o 18' 25"   INSB     15.50                                       
602592    V2592  Ori    5h 35m 46.5s   -2o 22' 27"   EA        7.80      13.5496          F3V             
602735    V2735  Ori    5h 38m 38.1s    9o  1' 11"   EA        9.10       1.226680        AO              
602757    V2757  Ori    5h 40m 34.7s   11o 46' 32"   EA       10.04       4.96652         A5              
602759    V2759  Ori    5h 42m 59.9s    9o 21'  5"   EB       10.40       0.498858        F0              
602762    V2762  Ori    5h 45m 39.1s   11o 19' 36"   EA        9.97       1.78018         F2              
602767    V2767  Ori    5h 54m 50.5s    7o  4' 43"   EA       13.1        1.52638                         
602772    V2772  Ori    5h 56m 52.5s   12o 27' 44"   EA       12.10       9.7857                          
602778    V2778  Ori    6h  3m 39.5s    3o 38' 27"   EA       10.15      14.3877          B9              
602780    V2780  Ori    6h  4m 23.7s   18o  0' 42"   EA       12.00       5.47535                         
602783    V2783  Ori    6h 10m 56.8s    6o 21'  4"   EA       10.13       4.21618         A0              
602787    V2787  Ori    6h 12m 17.1s   14o 56' 41"   EB       10.12       0.810979        A3m             
602790    V2790  Ori    6h 15m 31.4s   19o 35' 22"   EW       11.03       0.287842                        
609004    del    Ori    5h 32m  0.4s    0o 17' 57"   EA/DM     2.14       5.732476        O9.5II-III+B0III
609007    eta    Ori    5h 24m 28.6s   -2o 23' 50"   EA+BCE    3.31       7.989268        B0.5Vea+B3V     
========================================================================================================