Predictions for Grazing Occultation of ZC1712, 2016 May 16
Graze profile
Grazing Occultation of 1712SF8 Magnitude 3.6 [Red = 3.3]
R1712 = Zavijava = beta Virginis
Date: 2016 May 16 13h 31m, to 2016 May 16 13h 55m
Nominal site altitude 100m
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 -26 6 16.3 13 31 3 47 304 0.94 208.5 183.53 -4.47S
135 30 0 -26 18 26.2 13 31 58 46 304 0.97 208.3 183.39 -4.33S
136 0 0 -26 30 24.3 13 32 51 45 303 0.99 208.2 183.25 -4.19S
136 30 0 -26 42 10.5 13 33 43 45 303 1.01 208.0 183.11 -4.05S
137 0 0 -26 53 45.1 13 34 34 44 302 1.03 207.9 182.97 -3.91S
137 30 0 -27 5 8.1 13 35 24 43 302 1.06 207.8 182.83 -3.77S
138 0 0 -27 16 19.7 13 36 13 43 301 1.08 207.6 182.69 -3.63S
138 30 0 -27 27 20.0 13 37 0 42 301 1.10 207.5 182.55 -3.49S
139 0 0 -27 38 9.2 13 37 47 42 300 1.13 207.4 182.42 -3.36S
139 30 0 -27 48 47.3 13 38 33 41 300 1.15 207.2 182.28 -3.22S
140 0 0 -27 59 14.5 13 39 17 40 299 1.18 207.1 182.14 -3.09S
140 30 0 -28 9 30.9 13 40 1 40 299 1.20 206.9 182.01 -2.95S
141 0 0 -28 19 36.7 13 40 44 39 299 1.23 206.8 181.88 -2.82S
141 30 0 -28 29 31.9 13 41 25 38 298 1.26 206.7 181.74 -2.69S
142 0 0 -28 39 16.8 13 42 6 38 298 1.28 206.5 181.61 -2.55S
142 30 0 -28 48 51.4 13 42 46 37 297 1.31 206.4 181.49 -2.43S
143 0 0 -28 58 15.8 13 43 25 37 297 1.34 206.3 181.36 -2.30S
143 30 0 -29 7 30.3 13 44 3 36 296 1.37 206.2 181.23 -2.17S
144 0 0 -29 16 34.8 13 44 40 36 296 1.40 206.0 181.10 -2.04S
144 30 0 -29 25 29.7 13 45 17 35 296 1.43 205.9 180.97 -1.92S
145 0 0 -29 34 14.8 13 45 52 34 295 1.46 205.8 180.85 -1.79S
145 30 0 -29 42 50.5 13 46 27 34 295 1.49 205.7 180.72 -1.66S
146 0 0 -29 51 16.7 13 47 1 33 294 1.52 205.5 180.60 -1.54S
146 30 0 -29 59 33.6 13 47 34 33 294 1.56 205.4 180.47 -1.42S
147 0 0 -30 7 41.4 13 48 6 32 294 1.59 205.3 180.36 -1.30S
147 30 0 -30 15 40.2 13 48 38 32 293 1.63 205.2 180.23 -1.17S
148 0 0 -30 23 30.0 13 49 9 31 293 1.66 205.0 180.11 -1.05S
148 30 0 -30 31 11.0 13 49 39 30 293 1.70 204.9 179.99 -0.93S
149 0 0 -30 38 43.2 13 50 8 30 292 1.74 204.8 179.87 -0.82S
149 30 0 -30 46 6.9 13 50 37 29 292 1.77 204.7 179.76 -0.70S
150 0 0 -30 53 22.1 13 51 4 29 291 1.81 204.6 179.64 -0.58S
150 30 0 -31 0 28.8 13 51 32 28 291 1.85 204.5 179.53 -0.47S
151 0 0 -31 7 27.3 13 51 58 28 291 1.90 204.3 179.41 -0.36S
151 30 0 -31 14 17.6 13 52 24 27 290 1.94 204.2 179.30 -0.24S
152 0 0 -31 20 59.8 13 52 49 27 290 1.98 204.1 179.19 -0.13S
152 30 0 -31 27 34.0 13 53 13 26 290 2.03 204.0 179.08 -0.02S
153 0 0 -31 34 0.4 13 53 37 26 289 2.08 203.9 178.97 0.09S
153 30 0 -31 40 18.9 13 54 0 25 289 2.13 203.8 178.86 0.20S
154 0 0 -31 46 29.8 13 54 23 25 289 2.18 203.7 178.75 0.30S
154 30 0 -31 52 33.0 13 54 45 24 288 2.23 203.6 178.66 0.40S
155 0 0 -31 58 28.7 13 55 6 24 288 2.28 203.5 178.55 0.51S
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 3 meters [CHARM/CADARS, 5 measures]
1712 is triple:
AB 3.6 10.6 331" 286.1 (STT 576) Graze path of B approximately 103.0 km north, and 879.3 secs earlier compared to A
- refer to graze profile for exact distances
AC 3.7 9.6 412" 78.8 (STT 576) Graze path of C approximately 459.0 km south, and 888.2 secs later compared to A
- refer to graze profile for exact distances
Librations Long +3.24 Lat -1.18
P +180.79 D -0.97
Illumination of moon 76%+
Elongation of Moon 121
Vertical Profile Scale approx. 1.94 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.43 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-5.8 2.7 4.1 4.8 5.3 5.6 5.7 5.9
-3.8 2.7 4.1 4.8 5.3 5.6 5.7 5.9
-1.8 2.7 4.1 4.8 5.3 5.6 5.7 5.9
0.2 2.7 4.1 4.8 5.3 5.6 5.7 5.9
2.2 3.5 4.9 5.7 6.1 6.4 6.6 6.8
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
AU Mid 143.0 -30.6 170km 13 43 25.0
Newcastle 151.7 -33.0 179km 13 52 34.7
Pt Macquarie 152.8 -31.4 14km 13 53 29.2
Sydney 151.1 -33.8 289km 13 52 1.4
Lunar Limb Profile
