   Instant of          10:31:30 TDT     JD = 2443251.93900 
Greatest Eclipse:    (=10:30:42 UT)

Gamma = -0.3990            Ephemerides  = VSOP87/ELP2000-82 
Eclipse Magnitude = 0.9449             Lunation No. = -281 
     Eclipse Type = A                  Saros Series = 138 
                                                 ΔT = 47.9 s

Lunar Radius   k1 = 0.272488 (Penumbra)        Shift in      Δb =  0.00"
 Constants:    k2 = 0.272281 (Umbra)       Lunar Position:   Δl =  0.00"


Polynomial Besselian Elements for:   1977 Apr 18   11.000 TDT  (=t0)

  n        x          y         d          l1         l2          μ

  0   0.3382620 -0.3218380 10.8680296  0.5664330  0.0201940 345.166473 
  1   0.4926239  0.1332840  0.0142000  0.0000499  0.0000497  15.003540 
  2  -0.0000041 -0.0000505 -0.0000020 -0.0000100 -0.0000099   0.000000 
  3  -0.0000057 -0.0000015  0.0000000  0.0000000  0.0000000   0.000000
  
                tan f1 = 0.0046565        tan f2 = 0.0046333 

At time t1 (decimal hours), each Besselian element is evaluated by:

a = a0 + a1*t + a2*t2 + a3*t3  

where: a = x, y, d, l1, l2, or μ; t = t1 - t0 (decimal hours), and t0 =  11.000 TDT.


Circumstances at Greatest Eclipse:  10:30:42 UT

Latitude:   11.9° S      Sun’s Altitude:    66.4°          Path Width = 220.4 km
Longitude:  28.3° E      Sun’s Azimuth:    344.8°    Central Duration = 07m04s 
