   Instant of          21:09:26 TDT     JD = 1488144.38200 
Greatest Eclipse:    (=15:49:4 UT)

Gamma = 0.5412             Ephemerides  = VSOP87/ELP2000-82 
Eclipse Magnitude = 1.0768             Lunation No. = -32624 
     Eclipse Type = T                  Saros Series = 57 
                                                 ΔT = 19221.7 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:   -638 Apr 26   21.000 TDT  (=t0)

  n        x          y         d          l1         l2          μ

  0  -0.3259620  0.4416860 11.0536003  0.5304290 -0.0156300 136.113312 
  1   0.5216077  0.2634455  0.0137650 -0.0000019 -0.0000019  15.004490 
  2   0.0000513 -0.0000892 -0.0000020 -0.0000128 -0.0000128   0.000000 
  3  -0.0000088 -0.0000047  0.0000000  0.0000000  0.0000000   0.000000
  
                tan f1 = 0.0046042        tan f2 = 0.0045812 

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 =  21.000 TDT.


Circumstances at Greatest Eclipse:  15:49:4 UT

Latitude:   39.7° N      Sun’s Altitude:    57.0°          Path Width = 292.9 km
Longitude:  76.6° W      Sun’s Azimuth:    145.2°    Central Duration = 05m26s 
