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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).

Leo

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            
========================================================================================================
460008    Y      Leo    9h 36m 51.8s   26o 13' 58"   EA/SD    10.09       1.6861020       A5V             
460012    RT     Leo    9h 45m 22.4s   19o 54' 20"   EA/SD    10.3        7.447906                        
460015    RW     Leo   10h 39m 38.5s    8o 59' 40"   EA/SD    11.9        1.6825565                       
460031    TX     Leo   10h 35m  2.2s    8o 39'  2"   EA/DM     5.66       2.4450566       A2V             
460032    TY     Leo   10h 52m 27.2s   -5o  5' 17"   EA       10.5        1.18466         G               
460034    UU     Leo    9h 47m 49.7s   12o 59'  3"   EA/SD    11.4        1.6797409       A2              
460035    UV     Leo   10h 38m 20.8s   14o 16'  4"   EA/DW     8.90       0.60008478      G0V+G2V         
460037    UX     Leo   11h 17m 13.6s   -6o 35' 14"   EA/SD:   10.3        1.007172        F4              
460039    UZ     Leo   10h 40m 33.2s   13o 34'  1"   EW/KE     9.58       0.6180428       A7              
460044    VZ     Leo    9h 26m 50.7s   16o 36'  3"   EA/SD    11.8        1.089906        A5              
460047    WY     Leo    9h 31m  1.1s   16o 39' 25"   EA/D     11.1        4.985778        A2              
460048    WZ     Leo    9h 34m 12.7s   18o 54'  6"   EA/D     11.3        1.405570        A1              
460049    XX     Leo    9h 59m 29.3s   13o 47'  6"   EB       11.1        0.97094     :   A8              
460050    XY     Leo   10h  1m 40.4s   17o 24' 33"   EW/KW     9.45       0.2840969       K0V+K0          
460051    XZ     Leo   10h  2m 34.2s   17o  2' 47"   EW/KE    10.6        0.4877351       A6              
460061    AG     Leo    9h 53m 32.2s   16o  2'  6"   EA/D     10.7        3.392498        F5              
460065    AL     Leo    9h 58m 12.9s   18o 17' 28"   EA/D     10.2        4.1444      :   F5              
460066    AM     Leo   11h  2m 10.9s    9o 53' 43"   EW/KW     9.25       0.36579740      F8V             
460069    AP     Leo   11h  5m  5.0s    5o  9'  6"   EW/KW     9.32       0.4303576       G0V             
460085    BG     Leo   11h 41m 46.2s   23o 12'  2"   EA/SD    13.6        3.779167                        
460089    BL     Leo   11h 45m 38.4s   24o 46' 51"   EW/KW    13.8        0.2819306                       
460091    BN     Leo   11h 48m  3.1s   18o 58'  2"   EA/SD    15.0        1.703688                        
460099    BV     Leo   11h 27m 51.6s   24o 44'  5"   EB/KE    15.8        0.941583                        
460100    BW     Leo   11h 32m 16.4s   17o 19' 25"   EW/KW    14.7        0.337221                        
460103    BZ     Leo   11h 42m  0.3s   22o 52'  7"   EW/KW    15.3        0.269722                        
460106    CE     Leo   11h 44m 24.3s   23o 21' 23"   EW/KW    11.8        0.303429                        
460137    DO     Leo   10h 40m 51.2s   15o 11' 34"   NL       16.0                                        
460143    DU     Leo    9h 44m 11.4s   25o 21' 11"   EA/SD     8.68                                       
460163    ET     Leo   10h 33m 25.8s   17o 34' 27"   EW:       9.60                                       
460167    EX     Leo   10h 45m  6.8s   16o 20' 16"   EW        8.27                                       
460174    FK     Leo   11h 12m  5.5s   14o 18' 22"   EA        8.57                                       
460176    FM     Leo   11h 12m 45.1s    0o 20' 53"   EA        8.54                                       
460182    FS     Leo   11h 27m 58.5s   14o 49' 56"   EB        9.06                                       
460203    GU     Leo    9h 47m 33.8s   18o 21' 43"   EW       11.62       0.354076                        
460204    GV     Leo   10h 11m 59.2s   16o 52' 30"   EW       11.45       0.266727                        
460205    GW     Leo   10h 18m 53.5s   13o 41'  9"   EW       12.06       0.33614                         
460210    HI     Leo   11h 12m 16.8s    1o 19'  6"   EB       11.2        0.311589                        
460219    HS     Leo   11h 18m 42.8s   27o 31' 50"   EW       13.8        0.33770                         
========================================================================================================