Besseliam Elements for Annular Solar Eclipse of 2014 Apr 29 (original) (raw)

Fred Espenak

The following table contains the Besseliam elements for the Annular Solar Eclipse of 2014 Apr 29 .

The geographic coordinates of the eclipse path are listed in the . The global visibility of the eclipse is shown on an Orthographic Map . The features of this map are described in the Key to Solar Eclipse Path Tables. The path of the eclipse is displayed in greater detail on a Google Map .

Besselian Elements for the Annular Solar Eclipse of 2014 Apr 29

Non-Central Eclipse

        Equatorial Conjunction:     05:38:58.2 TDT     J.D. = 2456776.735396
          (Sun & Moon in R.A.)    (=05:37:50.9 UT)

         Ecliptic Conjunction:      06:15:28.3 TDT     J.D. = 2456776.760744
         (Sun & Moon in Ec. Lo.)  (=06:14:20.9 UT)

              Instant of            06:04:32.9 TDT     J.D. = 2456776.753158
           Greatest Eclipse:      (=06:03:25.5 UT)


        --------------------------------------------------------------------------- 
                    Gamma = -1.0000            Ephemerides = JPL DE405
        Eclipse Magnitude =  0.9868           Lunation No. =     177
                       ΔT =    67.3 s         Saros Series =  148 (21/75)

        Lunar Radius   k1 = 0.272508 (Penumbra)        Shift in      Δb =  0.00"
         Constants:    k2 = 0.272281 (Umbra)       Lunar Position:   Δl =  0.00"

        --------------------------------------------------------------------------- 
        Geocentric Coordinates of Sun & Moon at Greatest Eclipse (JPL DE405):

        Sun:       R.A. = 02h25m52.9s         Moon:      R.A. = 02h26m46.0s
                   Dec. =+14°26'54.2"                    Dec. =+13°31'06.8"
          Semi-Diameter =    15'52.9"           Semi-Diameter =    15'38.4"
            Eq.Hor.Par. =       08.7"             Eq.Hor.Par. =  0°57'24.1"

        --------------------------------------------------------------------------- 
        Polynomial Besselian Elements for:   2014 Apr 29   06:00:00.0 TDT  (=t0)

          n        x          y         d          l1         l2          μ

          0   0.185158  -0.983525   14.44979   0.550556   0.004377  270.65601
          1   0.5282668  0.1221127   0.012658  0.0001187  0.0001181  15.002755
          2  -0.0000050 -0.0000473  -0.000003 -0.0000111 -0.0000111
          3  -0.0000072 -0.0000016

                         Tan ƒ1 = 0.0046433    Tan ƒ2 = 0.0046202

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

           a = a0 + a1*t + a2*t^2 + a3*t^3    (or a = Σ [an*t^n]; n = 0 to 3)

              where:    a = x, y, d, l1, l2, or μ
                        t = t1 - t0  (decimal hours) and t0 =  6.000 TDT


        The Besselian elements were derived from a least-squares fit to elements
        calculated at five uniformly spaced times over a six hour period centered at t0.
        The Besselian elements are valid over the period  3.00 ≤ t0 ≤  9.00 TDT.

        Note that all times are expressed in Terrestrial Dynamical Time (TDT).

               Saros Series 148:  Member 21 of 75 eclipses in series.

Eclipse Predictions

Predictions for the Annular Solar Eclipse of 2014 Apr 29 were generated using the JPL DE405 solar and lunar ephemerides and a value of ΔT = 67.3 seconds.

Acknowledgments

All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy. Permission is freely granted to reproduce this data when accompanied by an acknowledgment:

"Eclipse Predictions by Fred Espenak, NASA's GSFC"

For more information, see: NASA Copyright Information