Predictions for Grazing Occultation of ZC1951, 2015 Sep 16
Graze profile
Grazing Occultation of 1951SK0 Magnitude 7.1 [Red = 6.6]
R1951 = 81 Virginis
Date: 2015 Sep 16 8h 24m, to 2015 Sep 16 8h 41m
Nominal site altitude 50m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
135 0 0 -27 28 45 8 24 1 6 38 282 1.29 198.8 176.21 -1.33S
135 30 0 -27 31 22 8 24 38 5 37 281 1.32 198.7 176.07 -1.20S
136 0 0 -27 33 51 8 25 15 4 37 281 1.35 198.6 175.94 -1.07S
136 30 0 -27 36 11 8 25 51 4 36 281 1.37 198.4 175.82 -0.94S
137 0 0 -27 38 23 8 26 26 3 35 280 1.40 198.3 175.69 -0.82S
137 30 0 -27 40 26 8 27 0 3 35 280 1.43 198.2 175.58 -0.71S
138 0 0 -27 42 22 8 27 34 2 34 280 1.46 198.1 175.46 -0.59S
138 30 0 -27 44 10 8 28 7 2 34 279 1.50 198.0 175.34 -0.47S
139 0 0 -27 45 49 8 28 40 1 33 279 1.53 197.8 175.22 -0.35S
139 30 0 -27 47 21 8 29 12 0 33 279 1.56 197.7 175.11 -0.24S
140 0 0 -27 48 46 8 29 43 0 32 278 1.59 197.6 174.99 -0.12S
140 30 0 -27 50 2 8 30 14 -1 32 278 1.63 197.5 174.88 -0.01S
141 0 0 -27 51 12 8 30 43 -1 31 278 1.66 197.4 174.77 0.10S
141 30 0 -27 52 14 8 31 13 -2 30 277 1.70 197.3 174.66 0.21S
142 0 0 -27 53 8 8 31 41 -2 30 277 1.74 197.2 174.55 0.32S
142 30 0 -27 53 56 8 32 9 -3 29 277 1.78 197.1 174.45 0.43S
143 0 0 -27 54 36 8 32 37 -3 29 276 1.82 197.0 174.34 0.53S
143 30 0 -27 55 9 8 33 4 -4 28 276 1.86 196.9 174.24 0.64S
144 0 0 -27 55 36 8 33 30 -4 28 276 1.90 196.8 174.13 0.74S
144 30 0 -27 55 56 8 33 56 -5 27 275 1.95 196.6 174.03 0.84S
145 0 0 -27 56 8 8 34 21 -6 27 275 1.99 196.5 173.93 0.94S
145 30 0 -27 56 15 8 34 45 -6 26 275 2.04 196.5 173.83 1.04S
146 0 0 -27 56 14 8 35 9 -7 26 275 2.09 196.4 173.73 1.14S
146 30 0 -27 56 8 8 35 32 -7 25 274 2.14 196.3 173.64 1.23S
147 0 0 -27 55 54 8 35 55 -8 25 274 2.19 196.2 173.54 1.33S
147 30 0 -27 55 35 8 36 17 -8 24 274 2.24 196.1 173.45 1.42S
148 0 0 -27 55 9 8 36 39 -9 24 273 2.30 196.0 173.36 1.51S
148 30 0 -27 54 37 8 37 0 -9 23 273 2.36 195.9 173.27 1.61S
149 0 0 -27 54 0 8 37 20 -10 22 273 2.42 195.8 173.18 1.70S
149 30 0 -27 53 16 8 37 40 -10 22 273 2.48 195.7 173.09 1.78S
150 0 0 -27 52 26 8 37 59 -11 21 272 2.55 195.6 173.00 1.87S
150 30 0 -27 51 30 8 38 18 -11 21 272 2.61 195.5 172.91 1.96S
151 0 0 -27 50 28 8 38 37 -12 20 272 2.68 195.4 172.83 2.04S
151 30 0 -27 49 21 8 38 54 20 271 2.76 195.4 172.74 2.13S
152 0 0 -27 48 8 8 39 12 19 271 2.84 195.3 172.66 2.21S
152 30 0 -27 46 50 8 39 28 19 271 2.92 195.2 172.58 2.29S
153 0 0 -27 45 26 8 39 45 18 271 3.00 195.1 172.50 2.37S
153 30 0 -27 43 57 8 40 0 18 270 3.09 195.0 172.42 2.45S
154 0 0 -27 42 22 8 40 16 17 270 3.19 195.0 172.34 2.53S
154 30 0 -27 40 42 8 40 30 17 270 3.29 194.9 172.26 2.61S
155 0 0 -27 38 57 8 40 45 16 269 3.39 194.8 172.19 2.69S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level. The path
is adjusted for the effects of refraction at low moon altitudes.
Projected diameter of star 1 meters [Estimated]
1951 is quadruple:
Graze prediction is based on the mean position of AB 7.79 8.08 2.62" 38.7
(STF1763) Graze path of A 1.89 km north, and 1.1 secs earlier compared to prediction
Graze path of B 2.47 km south, and 1.4 secs later compared to prediction
AB 7.79 8.08 2.62" 38.7 (STF1763) Graze path of B 4.35 km south, and 2.5 secs later compared to A
7.1 10.8 9.9" 338.3 (OCC1451) Graze path of companion 13.89 km south, and 15.3 secs earlier compared to primary
AC 7.8 11.7 139" 326.8 (STF1763) Graze path of C 161.27 km south, and 265.7 secs earlier compared to A
C A S S I N I R E G I O N G R A Z E
Librations Long -3.81 Lat -3.01
P +174.12 D -3.13
Illumination of moon 8%+
Elongation of Moon 33
Vertical Profile Scale 1.89 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.55 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-3.1 5.4 6.8 7.5 7.9 8.2 8.4 8.6
-1.1 5.8 7.2 8.0 8.4 8.7 8.9 9.1
0.9 5.9 7.3 8.0 8.5 8.8 9.0 9.2
2.9 5.9 7.3 8.0 8.5 8.8 9.0 9.2
4.9 5.9 7.3 8.0 8.5 8.8 9.0 9.2
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Lunar Limb Profile
