Besseliam Elements for Hybrid Solar Eclipse of 2005 Apr 08 (original) (raw)

Fred Espenak

The following table contains the Besselian elements for the Hybrid Solar Eclipse of 2005 Apr 08 .

The geographic coordinates of the eclipse path are listed in the Path Table. The global visibility of the eclipse is shown on an Orthographic Map. The path of the eclipse is displayed in greater detail on an Google Map.

Besselian Elements for the Hybrid Solar Eclipse of 2005 Apr 08

        Equatorial Conjunction:     20:16:43.8 TDT     J.D. = 2453469.344952
          (Sun & Moon in R.A.)    (=20:15:39.1 UT)

         Ecliptic Conjunction:      20:33:04.5 TDT     J.D. = 2453469.356302
         (Sun & Moon in Ec. Lo.)  (=20:31:59.8 UT)

              Instant of            20:36:49.9 TDT     J.D. = 2453469.358911
           Greatest Eclipse:      (=20:35:45.2 UT)


        --------------------------------------------------------------------------- 
                    Gamma = -0.3474            Ephemerides = VSOP87/ELP2000-85
        Eclipse Magnitude =  1.0074           Lunation No. =      65
                       ΔT =    64.7 s         Saros Series =  129 (51/80)

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

        --------------------------------------------------------------------------- 
        Geocentric Coordinates of Sun & Moon at Greatest Eclipse (VSOP87/ELP2000-85):

        Sun:       R.A. = 01h10m30.3s         Moon:      R.A. = 01h11m08.3s
                   Dec. =+07°28'47.2"                    Dec. =+07°10'59.2"
          Semi-Diameter =    15'58.2"           Semi-Diameter =    15'50.7"
            Eq.Hor.Par. =       08.8"             Eq.Hor.Par. =  0°58'09.0"

        --------------------------------------------------------------------------- 
        Polynomial Besselian Elements for:   2005 Apr 08   21:00:00.0 TDT  (=t0)

          n        x          y         d          l1         l2          μ

          0   0.350320  -0.207422    7.48629   0.548547   0.002398  134.57384
          1   0.4857737  0.2575755   0.014899  0.0001069  0.0001064  15.004043
          2  -0.0000101 -0.0000367  -0.000002 -0.0000115 -0.0000115
          3  -0.0000068 -0.0000039

                         Tan ƒ1 = 0.0046686    Tan ƒ2 = 0.0046454

        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 = 21.000 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 18.00 ≤ t0 ≤ 24.00 TDT.

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

               Saros Series 129:  Member 51 of 80 eclipses in series.

Greatest Eclipse and Greatest Duration

Instant of Greatest Eclipse: Time = 20:35:45.2 UT Lat = 10°34.1'S Long = 118°58.9'W (GE) Sun Altitude = 69.6° Path Width = 27.0 km Sun Azimuth = 331.9° Central Duration = 00m42.1s

Instant of Greatest Duration: Time = 20:33:13 UT Lat = 11°12'S Long = 119°32'W (GD) Sun Altitude = 69.6° Path Width = 27.0 km Sun Azimuth = 335.7° Central Duration = 00m42.1s

Eclipse Predictions

Predictions for the Hybrid Solar Eclipse of 2005 Apr 08 were generated using the VSOP87/ELP2000-85solar and lunar ephemerides and a value of ΔT = 64.7 seconds. The luanr coordinates have been calculated with respect to the Moon's Center of Mass. They DO NOT include a correction to the Center of Figure, or the effects of mountains and valleys along the edge of the Moon.

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