Elements of the Annular Solar Eclipse of 1999 Feb 16



Geocentric Conjunction      06:21:25.19 TDT     J.D. = 2451225.764875
 of Sun & Moon in R.A.:   (=06:20:21.65 UT)

      Instant of            06:34:38.00 TDT     J.D. = 2451225.774051
   Greatest Eclipse:      (=06:33:34.46 UT)


Geocentric Coordinates of Sun & Moon at Greatest Eclipse (DE200/LE200):

Sun:       R.A. = 21h57m21.030s       Moon:      R.A. = 21h57m48.910s
           Dec. =-12°28´00.07"                   Dec. =-12°54´33.40"
  Semi-Diameter =    16´11.38"          Semi-Diameter =    15´50.79"
    Eq.Hor.Par. =       08.90"            Eq.Hor.Par. =  0°58´09.19"
     delta R.A. =        9.722s/h          delta R.A. =      136.289s/h
     delta Dec. =       51.85"/h           delta Dec. =      527.41"/h


Lunar Radius   k1 = 0.2725076 (Penumbra)        Shift in     delta b =  0.00"
 Constants:    k2 = 0.2722810 (Umbra)       Lunar Position:  delta l =  0.00"

Geocentric Libration:   l =  -5.0°       Brown Lun. No. =  942
(Optical + Physical)    b =   0.7°         Saros Series =  140 (28/71)
                        c = -21.8°            Ephemeris = (DE200/LE200)

Eclipse Magnitude = 0.99276        Gamma =-0.47260        delta T =    63.5 s


Polynomial Besselian Elements for:   1999 Feb 16   07:00:00.0 TDT  (=t0)

  n        x          y         d          l1         l2          µ

  0   0.3419701 -0.4003277-12.4596071  0.5522704  0.0060825 281.479889
  1   0.5318219  0.1361290  0.0140654 -0.0001324 -0.0001318  15.001909
  2  -0.0000183  0.0001049  0.0000026 -0.0000116 -0.0000116   0.000002
  3  -0.0000076 -0.0000019  0.0000000  0.0000000  0.0000000   0.000000

                 Tan f1 = 0.0047333    Tan f2 = 0.0047097

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

            a = a0 + a1*t + a2*t2 + a3*t3    (or a = · [an*tn]; n = 0 to 3)

    where:  a = x, y, d, l1, l2, or µ
            t = t1 - t0  (decimal hours) and t0 = 7.000 TDT

The Besselian elements were derived from a least-squares fit to elements 
calculated at five separate times over a six hour period centered at t0. 
Thus the Besselian elements are valid over the period 4.00 < t0 < 10.00 TDT.

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

       Saros Series 140:  Member 28 of 71 eclipses in series.

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 & WebMaster: Fred Espenak e-mail: espenak@gsfc.nasa.gov Planetary Systems Branch - Code 693 NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 USA