The following table contains the Besselian elements for the Partial Solar Eclipse of 1971 Feb 25 .
The geographic coordinates of the eclipse path are 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 Partial Solar Eclipse of 1971 Feb 25
Non-Central Eclipse
Equatorial Conjunction: 10:37:14.9 TDT J.D. = 2441007.942534
(Sun & Moon in R.A.) (=10:36:33.5 UT)
Ecliptic Conjunction: 09:49:14.9 TDT J.D. = 2441007.909200
(Sun & Moon in Ec. Lo.) (=09:48:33.6 UT)
Instant of 09:38:07.0 TDT J.D. = 2441007.901470
Greatest Eclipse: (=09:37:25.6 UT)
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Gamma = 1.1188 Ephemerides = VSOP87/ELP2000-82
Eclipse Magnitude = 0.7872 Lunation No. = -357
ΔT = 41.4 s Saros Series = 149 (18/71)
Lunar Radius k1 = 0.272488 (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 (VSOP87/ELP2000-82):
Sun: R.A. = 22h31m38.2s Moon: R.A. = 22h29m32.0s
Dec. =-09°15'46.7" Dec. =-08°14'50.6"
Semi-Diameter = 16'09.4" Semi-Diameter = 16'42.7"
Eq.Hor.Par. = 08.9" Eq.Hor.Par. = 1°01'19.9"
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Polynomial Besselian Elements for: 1971 Feb 25 10:00:00.0 TDT (=t0)
n x y d l1 l2 μ
0 -0.321507 1.092394 -9.26004 0.537164 -0.008929 326.69077
1 0.5178937 0.2655075 0.014802 -0.0000413 -0.0000411 15.002882
2 -0.0000041 -0.0000051 0.000002 -0.0000130 -0.0000130
3 -0.0000087 -0.0000047
Tan ƒ1 = 0.0047228 Tan ƒ2 = 0.0046993
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 149: Member 18 of 71 eclipses in series.
Predictions for the Partial Solar Eclipse of 1971 Feb 25 were generated using the VSOP87/ELP2000-82 solar and lunar ephemerides and a value of ΔT = 41.4 seconds. The accuracy of the northern and southern edges of the eclipse path are limited to approximately 1-2 kilometers due to the lunar limb profile.
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
