The following table contains the Besseliam elements for the Partial Solar Eclipse of 2018 Feb 15 .
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 Feb 15
Non-Central Eclipse
Equatorial Conjunction: 20:16:17.1 TDT J.D. = 2458165.344642
(Sun & Moon in R.A.) (=20:15:08.5 UT)
Ecliptic Conjunction: 21:06:21.5 TDT J.D. = 2458165.379415
(Sun & Moon in Ec. Lo.) (=21:05:12.9 UT)
Instant of 20:52:33.3 TDT J.D. = 2458165.369829
Greatest Eclipse: (=20:51:24.7 UT)
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Gamma = -1.2116 Ephemerides = JPL DE405
Eclipse Magnitude = 0.5991 Lunation No. = 224
ΔT = 68.6 s Saros Series = 150 (17/71)
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. = 21h57m18.8s Moon: R.A. = 21h58m26.9s
Dec. =-12°28'07.3" Dec. =-13°32'29.9"
Semi-Diameter = 16'11.4" Semi-Diameter = 14'59.4"
Eq.Hor.Par. = 08.9" Eq.Hor.Par. = 0°55'00.9"
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Polynomial Besselian Elements for: 2018 Feb 15 21:00:00.0 TDT (=t0)
n x y d l1 l2 μ
0 0.363616 -1.157544 -12.46405 0.568275 0.022008 131.48074
1 0.4990506 0.1283331 0.014080 -0.0000923 -0.0000918 15.001822
2 -0.0000212 0.0001267 0.000003 -0.0000103 -0.0000102
3 -0.0000059 -0.0000014
Tan ƒ1 = 0.0047340 Tan ƒ2 = 0.0047104
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 150: Member 17 of 71 eclipses in series.
Predictions for the Partial Solar Eclipse of 2018 Feb 15 were generated using the JPL DE405 solar and lunar ephemerides and a value of ΔT = 68.6 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
