The following table contains the Besseliam elements for the Partial Solar Eclipse of 2018 Aug 11 .
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 .
Besselian Elements for the Partial Solar Eclipse of 2018 Aug 11
Non-Central Eclipse
Equatorial Conjunction: 09:21:12.9 TDT J.D. = 2458341.889733
(Sun & Moon in R.A.) (=09:20:04.2 UT)
Ecliptic Conjunction: 09:58:53.5 TDT J.D. = 2458341.915897
(Sun & Moon in Ec. Lo.) (=09:57:44.8 UT)
Instant of 09:47:28.0 TDT J.D. = 2458341.907963
Greatest Eclipse: (=09:46:19.2 UT)
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Gamma = 1.1476 Ephemerides = JPL DE405
Eclipse Magnitude = 0.7368 Lunation No. = 230
ΔT = 68.7 s Saros Series = 155 ( 6/71)
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. = 09h24m28.1s Moon: R.A. = 09h25m31.3s
Dec. =+15°13'19.1" Dec. =+16°21'40.4"
Semi-Diameter = 15'46.8" Semi-Diameter = 16'40.0"
Eq.Hor.Par. = 08.7" Eq.Hor.Par. = 1°01'10.1"
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Polynomial Besselian Elements for: 2018 Aug 11 10:00:00.0 TDT (=t0)
n x y d l1 l2 μ
0 0.367498 1.093921 15.21674 0.531717 -0.014369 328.69614
1 0.5684941 -0.1262929 -0.012076 0.0000338 0.0000336 15.003078
2 -0.0000477 -0.0001598 -0.000003 -0.0000128 -0.0000127
3 -0.0000096 0.0000021
Tan ƒ1 = 0.0046127 Tan ƒ2 = 0.0045897
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 = 10.000 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 7.00 ≤ t0 ≤ 13.00 TDT.
Note that all times are expressed in Terrestrial Dynamical Time (TDT).
Saros Series 155: Member 6 of 71 eclipses in series.
Predictions for the Partial Solar Eclipse of 2018 Aug 11 were generated using the JPL DE405 solar and lunar ephemerides and a value of ΔT = 68.7 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
