AG Vir      
 
  OMT = Observed Minimum Timings of Eclipsing Binaries, AAVSO - available online at www.aavso.org                                                        
System Type: EW          
             
GCVS 4 Eph. =   45432.4146 0.64265075          
           
--- Working ---     Observed Minima Timings       Sum =  
Epoch =   45432.415         Count =  
Period =   0.64265075         Std error  
Rounding Tol. =   0.2                
  Linear Quadratic                
LS Intercept =   -0.01257309                  
LS Slope =   1.72741E-06                
LS Quadr term =                
Sum diff² =                
New epoch =   51574.23333                
New Period =   0.642652477                
               
New Ephemeris = 51574.23333 0.642652477          
    AAVSO          
Source Type Tom error n' n O-C GCVS 4 OMT #4 IBVS nn Nelson BBSAG Misc Lin. Fit Date  
BBSAG   40290.543   -8001.0363 -8001 -0.0233493         -0.023349   -0.0263941 3/10/1969   12   Diethelm R   Bull...17 B
BBSAG   40319.441   -7956.0695 -7956 -0.044633         -0.044633   -0.0263164 4/7/1969       8   Diethelm R   Bull...18 B
BBSAG   40322.344   -7951.5522 -7951.5 -0.0335614         -0.033561   -0.0263086 4/10/1969   S   8   Diethelm R   Bull...18 B
BBSAG   40344.521   -7917.0436 -7917 -0.0280122         -0.028012   -0.026249 5/3/1969   5   Diethelm R   Bull...18 B
BBSAG   40650.444   -7441.0105 -7441 -0.0067692         -0.006769   -0.0254268 3/4/1970   7   Diethelm R   Bull...23 B
BBSAG   40688.349   -7382.0283 -7382 -0.0181635         -0.018163   -0.0253248 4/11/1970   7   Diethelm R   Bull...23 B
BBSAG   40711.483   -7346.0305 -7346 -0.0195905         -0.019591   -0.0252627 5/4/1970   10   Diethelm R   Bull...24 B
BBSAG   40731.407   -7315.0276 -7315 -0.0177638         -0.017764   -0.0252091 5/24/1970   8   Diethelm R   Bull...24 B
BBSAG   40740.43   -7300.9874 -7301 0.0081257         0.0081257   -0.0251849 6/2/1970   10   Diethelm R   Bull...24 B
IBVS 937   41391.427 na -6288.0001 -6288 -8.4E-05   -8.4E-05   -0.0234351 3/14/1972    
BBSAG   42568.441   -4456.5015 -4456.5 -0.0009326         -0.000933   -0.0202713 6/4/1975   S   8   Diethelm R   Bull.23 B
OMT #4   42897.802 na -3943.9976 -3944 0.001558   0.001558     -0.019386 4/29/1976  
OMT #4   43262.813 na -3376.0203 -3376 -0.013068   -0.013068     -0.0184048 4/29/1977  
OMT #4   43262.829 na -3375.9954 -3376 0.002932   0.002932     -0.0184048 4/29/1977  
OMT #4   43577.696 na -2886.045 -2886 -0.0289355   -0.028935     -0.0175584 3/10/1978  
OMT #4   44334.759 na -1708.0133 -1708 -0.008519   -0.008519     -0.0155235 4/5/1980  
BBSAG   45074.457   -557.00238 -556.5 -0.3228576         -0.322858   -0.0135344 4/14/1982   12   Diethelm R   Bull.60 B
GCVS 4   45432.4146 na -0.0006224 0 -0.0004 -0.0004   -0.0125731 4/7/1983    
OMT #4   46165.685 na 1141.0085 1141 0.0054942   0.0054942     -0.0106021 4/10/1985  
OMT #4   46174.682 na 1155.0084 1155 0.0053838   0.0053838     -0.0105779 4/19/1985  
BBSAG   46180.409   1163.9199 1164 -0.051473         -0.051473   -0.0105624 4/24/1985   7   Paschke A   Bull.77 B
OMT #4   46181.747 na 1166.0019 1166 0.0012255   0.0012255     -0.0105589 4/26/1985  
OMT #4   46206.801 na 1204.9873 1205 -0.0081538   -0.008154     -0.0104916 5/21/1985  
MVS 1   46522.365   1696.0223 1696 0.014328         0.014328 -0.0096434 4/1/1986   pg     1,19 K
OMT #4   46530.710 na 1709.0076 1709 0.0048682   0.0048682     -0.0096209 4/10/1986  
BBSAG   46892.505   2271.9805 2272 -0.012504         -0.012504   -0.0086484 4/7/1987   v 13   Paschke A   Bull.83 B
BBSAG   46903.42   2288.9649 2289 -0.0225668         -0.022567   -0.008619 4/17/1987   v 15   Paschke A   Bull.83 B
OMT #4   46915.668 na 2308.0234 2308 0.015069   0.015069     -0.0085862 4/30/1987  
OMT #4   46940.723 na 2347.0104 2347 0.0066898   0.0066898     -0.0085189 5/25/1987  
BAV-M   47261.393   2845.9906 2846 -0.0060345         -0.006035 -0.0076569 4/9/1988   v     50 K
IBVS 3355   47262.3659 na 2847.5045 2847.5 0.0028894     0.002889375   -0.0076543 4/10/1988  
BBSAG   47270.3876   2859.9867 2860 -0.008545         -0.008545   -0.0076327 4/18/1988   phe 1   Diethelm R   Bull.88 B
BBSAG   47270.404   2860.0122 2860 0.007855         0.007855   -0.0076327 4/18/1988   v 12   Paschke A   Bull.88 B
OMT #4   47629.645 na 3419.011 3419 0.0070857   0.0070857     -0.0066671 4/13/1989  
BAV-M   47653.408   3455.9876 3456 -0.007992         -0.007992 -0.0066032 5/6/1989   v     52 K
BAV-M   47982.448   3967.9919 3968 -0.005176         -0.005176 -0.0057187 3/31/1990   v     59 K
OMT #4   48003.656 na 4000.9928 4001 -0.0046508   -0.004651     -0.0056617 4/22/1990  
BAV-M   48036.426   4051.9847 4052 -0.009839         -0.009839 -0.0055736 5/24/1990   v     59 K
BAV-M   48358.406   4553.0033 4553 0.0021353         0.0021353 -0.0047082 4/11/1991   v     59 K
BAV-M   48359.353   4554.4769 4554.5 -0.0148409         -0.014841 -0.0047056 4/12/1991   S v     59 K
BBSAG   48385.388 0.004 4594.9888 4595 -0.0071963         -0.007196   -0.0046356 5/8/1991   phe 20   Blaettler E   Bull.98 B
BAAVS   48385.44   4595.0697 4595 0.0448038         0.0448038 -0.0046356 5/8/1991   phe  V     S 91,16 K
BBSAG   48733.3964 0.0019 5136.5091 5136.5 0.0058226         0.0058226   -0.0037002 4/20/1992   S phe 20   Diethelm R   Bull.101 B
BAV-M   49059.5297   5643.9905 5644 -0.006133         -0.006133 -0.0028236 3/13/1993   phe  B     62 K
BAV-M   49059.5308   5643.9922 5644 -0.005033         -0.005033 -0.0028236 3/13/1993   phe  V     62 K
BBSAG   49420.387 0.005 6205.5043 6205.5 0.0027709         0.0027709   -0.0018536 3/8/1994   S v 13   Martignoni M   Bull.108 B
BBSAG   49429.364 0.007 6219.473 6219.5 -0.0173396         -0.01734   -0.0018294 3/17/1994   S v 21   Martignoni M   Bull.108 B
BAV-M   49471.4772   6285.0035 6285 0.0022363         0.0022363 -0.0017163 4/28/1994   phe  V     68 K
BAV-M   49471.4779   6285.0046 6285 0.0029362         0.0029362 -0.0017163 4/28/1994   phe  B     68 K
BBSAG   49776.42 0.007 6759.5113 6759.5 0.0072554         0.0072554   -0.0008966 2/27/1995   S v 14   Martignoni M   Bull.110 B
BBSAG   49777.387 0.002 6761.016 6761 0.0102793         0.0102793   -0.0008941 2/28/1995   v 18   Martignoni M   Bull.110 B
BBSAG   49811.432 0.001 6813.9919 6814 -0.0052105         -0.00521   -0.0008025 4/3/1995   v 20   Martignoni M   Bull.113 B
BAV-M   49865.422   6898.0033 6898 0.0021265         0.0021265 -0.0006574 5/27/1995   v     93 K
OMT #4   50163.613 na 7362.0049 7362 0.0031785   0.0031785     0.0001441 3/21/1996  
BAV-M   50571.371   7996.4989 7996.5 -0.0007224         -0.000722 0.0012402 5/2/1997   S v     101 K
BBSAG   50591.612 0.002 8027.995 8028 -0.003221         -0.003221   0.0012946 5/23/1997   19   Krobusek B   Bull.115 B
BBSAG   50591.6126   8027.9959 8028 -0.002621         -0.002621   0.0012946 5/23/1997   ccd     115 K
BAV-M   50597.402   8037.0045 8037 0.0029223         0.0029223 0.0013101 5/28/1997   v     101 K
IBVS 4621   50960.817 0.003 8602.4983 8602.5 -0.0010769       -0.001077   0.002287 5/27/1998   Subtract 1 hour  
IBVS 4840   51281.8693 0.0006 9102.0734 9102   Bad?  Possibly out one hour >>     0.0055068   0.0031498 4/13/1999 -0.03615983 0.0471735 0.0055068  
IBVS 4840   51307.8597 0.0005 9142.5159 9142.5 0.0102181     0.0102181   0.0032198 5/9/1999  
IBVS 5040   51573.912 0.0001 9556.5079 9556.5 0.0051076     0.0051076   0.0039349 1/30/2000