The following table contains the Besseliam elements for the Annular Solar Eclipse of 2012 May 20 .
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 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 2012 May 20
Equatorial Conjunction: 00:00:16.3 TDT J.D. = 2456068.500188
(Sun & Moon in R.A.) (=23:59:09.6 UT)
Ecliptic Conjunction: 23:48:08.1 TDT J.D. = 2456068.491761
(Sun & Moon in Ec. Lo.) (=23:47:01.4 UT)
Instant of 23:53:53.6 TDT J.D. = 2456068.495760
Greatest Eclipse: (=23:52:47.0 UT)
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Gamma = 0.4828 Ephemerides = JPL DE405
Eclipse Magnitude = 0.9439 Lunation No. = 153
ΔT = 66.7 s Saros Series = 128 (58/73)
Lunar Radius k1 = 0.272508 (Penumbra) Shift in Δb = 0.00"
Constants: k2 = 0.272281 (Umbra) Lunar Position: Δl = 0.00"
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Geocentric Coordinates of Sun & Moon at Greatest Eclipse (JPL DE405):
Sun: R.A. = 03h52m43.0s Moon: R.A. = 03h52m30.7s
Dec. =+20°13'15.1" Dec. =+20°39'06.3"
Semi-Diameter = 15'48.1" Semi-Diameter = 14'43.3"
Eq.Hor.Par. = 08.7" Eq.Hor.Par. = 0°54'01.7"
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Polynomial Besselian Elements for: 2012 May 20 00:00:00.0 TDT (=t0)
n x y d l1 l2 μ
0 -0.002272 0.485522 20.22055 0.566506 0.020247 180.85658
1 0.5031812 0.0560536 0.008271 -0.0000312 -0.0000311 15.000578
2 0.0000183 -0.0001411 -0.000005 -0.0000097 -0.0000097
3 -0.0000057 -0.0000006
Tan ƒ1 = 0.0046204 Tan ƒ2 = 0.0045974
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 = 0.000 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 21.00 ≤ t0 ≤ 3.00 TDT.
Note that all times are expressed in Terrestrial Dynamical Time (TDT).
Saros Series 128: Member 58 of 73 eclipses in series.
Instant of Greatest Eclipse: Time = 23:52:47.0 UT Lat = 49°05.6'N Long = 176°16.4'E (GE) Sun Altitude = 60.9° Path Width = 236.9 km Sun Azimuth = 171.0° Central Duration = 05m46.3s Instant of Greatest Duration: Time = 23:55:53 UT Lat = 49°19'N Long = 177°46'E (GD) Sun Altitude = 60.8° Path Width = 236.7 km Sun Azimuth = 175.4° Central Duration = 05m46.3s
Predictions for the Annular Solar Eclipse of 2012 May 20 were generated using the JPL DE405 solar and lunar ephemerides and a value of ΔT = 66.7 seconds.
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
