The following table contains the Besseliam elements for the Partial Solar Eclipse of 2018 Jul 13 .
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 Jul 13
Non-Central Eclipse
Equatorial Conjunction: 03:10:13.3 TDT J.D. = 2458312.632098
(Sun & Moon in R.A.) (=03:09:04.6 UT)
Ecliptic Conjunction: 02:49:01.2 TDT J.D. = 2458312.617375
(Sun & Moon in Ec. Lo.) (=02:47:52.5 UT)
Instant of 03:02:16.1 TDT J.D. = 2458312.626576
Greatest Eclipse: (=03:01:07.4 UT)
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Gamma = -1.3542 Ephemerides = JPL DE405
Eclipse Magnitude = 0.3365 Lunation No. = 229
ΔT = 68.7 s Saros Series = 117 (69/71)
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. = 07h29m31.1s Moon: R.A. = 07h29m10.9s
Dec. =+21°50'30.6" Dec. =+20°27'46.1"
Semi-Diameter = 15'44.0" Semi-Diameter = 16'42.8"
Eq.Hor.Par. = 08.7" Eq.Hor.Par. = 1°01'20.4"
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Polynomial Besselian Elements for: 2018 Jul 13 03:00:00.0 TDT (=t0)
n x y d l1 l2 μ
0 -0.099288 -1.350764 21.84532 0.530187 -0.015891 223.57079
1 0.5828128 -0.0332930 -0.005937 -0.0000118 -0.0000118 15.000242
2 -0.0000013 -0.0000770 -0.000005 -0.0000128 -0.0000127
3 -0.0000099 0.0000005
Tan ƒ1 = 0.0045988 Tan ƒ2 = 0.0045759
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 = 3.000 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 0.00 ≤ t0 ≤ 6.00 TDT.
Note that all times are expressed in Terrestrial Dynamical Time (TDT).
Saros Series 117: Member 69 of 71 eclipses in series.
Predictions for the Partial Solar Eclipse of 2018 Jul 13 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
