Predictions for Grazing Occultation of ZC2495, 2016 Aug 13
Graze profile
Grazing Occultation of 2495SA0 Magnitude 6.0 [Red = 5.9]
Date: 2016 Aug 13 10h 54m, to 2016 Aug 13 11h 12m
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
167 0 0 -43 37 5.2 10 53 59 52 303 0.77 181.9 178.22 5.13S
167 30 0 -43 33 39.0 10 54 47 52 302 0.78 181.8 178.12 5.23S
168 0 0 -43 30 5.2 10 55 35 52 301 0.79 181.7 178.02 5.32S
168 30 0 -43 26 23.9 10 56 22 51 300 0.80 181.6 177.93 5.41S
169 0 0 -43 22 35.1 10 57 9 51 299 0.82 181.5 177.84 5.51S
169 30 0 -43 18 38.9 10 57 55 50 298 0.83 181.5 177.74 5.60S
170 0 0 -43 14 35.3 10 58 42 50 298 0.84 181.4 177.65 5.69S
170 30 0 -43 10 24.4 10 59 28 50 297 0.85 181.3 177.56 5.78S
171 0 0 -43 6 6.2 11 0 14 49 296 0.87 181.2 177.47 5.87S
171 30 0 -43 1 40.7 11 0 59 49 295 0.88 181.1 177.39 5.96S
172 0 0 -42 57 8.1 11 1 45 48 294 0.89 181.0 177.30 6.04S
172 30 0 -42 52 28.3 11 2 30 48 294 0.91 180.9 177.21 6.13S
173 0 0 -42 47 41.5 11 3 14 47 293 0.92 180.8 177.13 6.22S
173 30 0 -42 42 47.6 11 3 59 47 292 0.93 180.8 177.04 6.30S
174 0 0 -42 37 46.8 11 4 43 47 291 0.95 180.7 176.96 6.38S
174 30 0 -42 32 39.0 11 5 27 46 291 0.96 180.6 176.88 6.46S
175 0 0 -42 27 24.3 11 6 10 46 290 0.98 180.5 176.80 6.54S
175 30 0 -42 22 2.9 11 6 54 45 289 0.99 180.4 176.72 6.62S
176 0 0 -42 16 34.7 11 7 37 45 288 1.01 180.4 176.64 6.70S
176 30 0 -42 10 59.8 11 8 19 44 288 1.03 180.3 176.56 6.78S
177 0 0 -42 5 18.2 11 9 2 44 287 1.04 180.2 176.49 6.86S
177 30 0 -41 59 30.1 11 9 44 43 286 1.06 180.1 176.41 6.93S
178 0 0 -41 53 35.5 11 10 25 43 286 1.08 180.0 176.34 7.01S
178 30 0 -41 47 34.4 11 11 7 42 285 1.09 180.0 176.26 7.08S
179 0 0 -41 41 26.9 11 11 48 42 284 1.11 179.9 176.19 7.15S
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.
2495 is triple:
Graze prediction is based on the mean position of AB 6.34 7.56 2.42" 263.4
(BU 126) Graze path of A approximately 0.2 km south, and 1.6 secs later compared to prediction
Graze path of B approximately 0.5 km north, and 4.8 secs earlier compared to prediction
- refer to graze profile for exact distances
AB 6.34 7.56 2.42" 263.4 (BU 126) Graze path of B approximately 0.6 km north, and 6.4 secs earlier compared to A
- refer to graze profile for exact distances
AC 6.3 11.2 12.1" 137.5 (BU 126) Graze path of C approximately 17.6 km north, and 21.9 secs later compared to A
- refer to graze profile for exact distances
C A S S I N I R E G I O N G R A Z E
Librations Long -4.69 Lat -7.12
P +177.68 D -7.09
Illumination of moon 75%+
Elongation of Moon 119
Vertical Profile Scale approx. 2.07 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.43 deg/min
At longitude 173.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
2.2 3.9 5.4 6.1 6.6 6.9 7.2 7.3
4.2 4.7 6.2 7.0 7.5 7.8 8.0 8.2
6.2 5.0 6.4 7.2 7.7 8.1 8.3 8.5
8.2 5.6 7.1 7.8 8.4 8.7 9.0 9.1
10.2 5.6 7.1 7.9 8.4 8.7 9.0 9.2
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Chch graze 172.6 -43.5 74km 11 2 41.8
Dunedin 170.5 -45.9 294km 10 59 27.5
MidNZ 173.0 -41.0 195km 11 3 14.3
Wellington 174.8 -41.3 129km 11 5 53.0
Lunar Limb Profile
