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E c l i p s e s, 2004
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IV. Total Lunar Eclipse of 2004 May 4

The beginning of the eclipse visible in Europe except the west, Asia ex-
cept the north-east, Australia, most of Antarctica, Africa except the north-
west, Madagaskar, the extreme western Pacific Ocean, the Indian Ocean, and the
south-eastern Atlantic Ocean.
The end of the eclipse visible in Europe, south-western Asia, Antarctica,
Africa, Madagaskar, South America except the north-west, the Indian Ocean, and
the most of the Atlantic Ocean.

Universal time of geocentric opposition
h m s
in right ascension 2004, May 4, 20 43 53.6

Sun Moon
h m s h m s
Right ascension . . . . . . . . . . . . . 2 48 58.047 14 48 58.047
s s
Hourly motion . . . . . . . . . . . . . +9.639 +144.045
o ' " o ' "
Declination. . . . . . . . . . . . . . . .+16 15 01.25 -16 35 37.83
" "
Hourly motion . . . . . . . . . . . . . +42.77 -853.74
" ' "
Equatorial horizontal parallax . . . . . . 8.72 60 41.03
' " ' "
Apparent semidiameter . . . . . . . . . . 15 51.48 16 32.16

Circumstances of the Eclipse
Position Angles
of the Moon's axis
h m o
Moon enters penumbra . . . . . . . May 4, 17 50.6 16.08
Moon enters umbra . . . . . . . . 18 48.1 15.92
Moon enters totality . . . . . . . 19 51.8 15.75
Greatest eclipse . . . . . . . . . 20 30.2 15.64
Moon leaves totality . . . . . . . 21 08.2 15.54
Moon leaves umbra . . . . . . . . 22 12.2 15.36
Moon leaves penumbra . . . . . . . 23 09.6 15.19

--------------------------------------------
Contacts| Position |The Moon being in the Zenith in
of Umbra| Angles |-------------------------------
with Limb| from the | |
of Moon |North Point| Latitude | Longitude
---------|-----------|--------------|----------------
| o ' | o ' | o '
First | 95 21.4 | -16 14.2 | 76 05.1 E
Last | 310 15.6 | -17 02.9 | 26 57.0 E

Magnitude of the eclipse 1.307
"
Angular radius of the penumbra 4692.89
"
Angular radius of the umbra 2751.87
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| | | |Magnitudes of! | | | |Magnitudes of
T | s | d | P |-------------! T | s | d | P |-------------
| | | |umbral| penum. | | | |umbral| penum.
| | | eclipse|eclipse | | | eclipse|eclipse
-----|-----|------|------|------|------!-----|-----|------|------|------|------
h m| "| | o | | ! h m| "| | o | |
17 50| 5703| 2.074| 101.7| - | - !20 40| 1191| 0.433| 6.0| 1.281| 2.259
| | | | | ! 50| 1334| 0.485| 351.5| 1.209| 2.187
18 00| 5362| 1.950| 101.0| - | 0.161! | | | | |
10| 5022| 1.826| 100.1| - | 0.333!21 00| 1545| 0.561| 340.3| 1.103| 2.082
20| 4683| 1.703| 99.1| - | 0.504! 10| 1799| 0.653| 332.0| 0.976| 1.954
30| 4345| 1.580| 97.9| - | 0.674! 20| 2081| 0.756| 325.9| 0.835| 1.813
40| 4010| 1.458| 96.6| - | 0.843! 30| 2381| 0.865| 321.3| 0.684| 1.662
50| 3677| 1.337| 95.0| 0.033| 1.011! 40| 2693| 0.978| 317.7| 0.527| 1.505
| | | | | ! 50| 3013| 1.094| 314.8| 0.366| 1.344
19 00| 3347| 1.217| 93.1| 0.199| 1.178! | | | | |
10| 3021| 1.098| 90.9| 0.364| 1.342!22 00| 3339| 1.213| 312.5| 0.203| 1.180
20| 2701| 0.982| 88.0| 0.525| 1.503! 10| 3669| 1.332| 310.6| 0.036| 1.014
30| 2390| 0.869| 84.5| 0.682| 1.661! 20| 4003| 1.454| 309.0| - | 0.846
40| 2090| 0.760| 79.9| 0.833| 1.812! 30| 4339| 1.576| 307.7| - | 0.677
50| 1807| 0.657| 73.8| 0.975| 1.954! 40| 4677| 1.698| 306.5| - | 0.507
| | | | | ! 50| 5017| 1.821| 305.5| - | 0.336
20 00| 1552| 0.564| 65.6| 1.103| 2.082! | | | | |
10| 1340| 0.487| 54.6| 1.209| 2.188!23 00| 5358| 1.945| 304.7| - | 0.164
20| 1194| 0.434| 40.1| 1.282| 2.260! 10| 5700| 2.069| 303.9| - | -
30| 1140| 0.414| 23.1| 1.307| 2.285! | | | | |
s
T - universal time ( TDT - UT1 = 66.0 );
s - the angular distance between the centers of the Moon and the shadow;
d - the linear distance between the Moon's center and that of the shadow
in terms of the shadow's radius;
P - the position angle of the Moon's disk semi-diameter directed towards
the shadow's center.