Predictions for Grazing Occultation of ZC2372, 2016 Aug 12
Graze profile
Grazing Occultation of 2372SG8 Magnitude 4.3 [Red = 3.8]
R2372 = phi Ophiuchi
Date: 2016 Aug 12 11h 52m, to 2016 Aug 12 12h 26m
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 -32 2 50.2 11 51 37 62 296 0.54 188.3 179.60 2.10S
135 30 0 -32 2 52.3 11 52 38 61 295 0.55 188.2 179.46 2.24S
136 0 0 -32 2 44.1 11 53 39 61 295 0.56 188.0 179.30 2.39S
136 30 0 -32 2 25.7 11 54 39 60 294 0.58 187.9 179.15 2.54S
137 0 0 -32 1 57.0 11 55 39 59 293 0.59 187.7 179.01 2.69S
137 30 0 -32 1 18.3 11 56 38 59 292 0.60 187.6 178.86 2.84S
138 0 0 -32 0 29.6 11 57 37 58 291 0.62 187.4 178.71 2.98S
138 30 0 -31 59 31.1 11 58 35 58 291 0.63 187.3 178.57 3.13S
139 0 0 -31 58 22.7 11 59 33 57 290 0.65 187.2 178.43 3.27S
139 30 0 -31 57 4.7 12 0 30 57 289 0.66 187.0 178.29 3.41S
140 0 0 -31 55 37.0 12 1 27 56 288 0.68 186.9 178.15 3.55S
140 30 0 -31 53 59.9 12 2 23 55 288 0.69 186.7 178.01 3.69S
141 0 0 -31 52 13.4 12 3 19 55 287 0.71 186.6 177.88 3.82S
141 30 0 -31 50 17.6 12 4 14 54 286 0.72 186.5 177.74 3.95S
142 0 0 -31 48 12.6 12 5 9 54 286 0.74 186.3 177.61 4.09S
142 30 0 -31 45 58.6 12 6 3 53 285 0.75 186.2 177.48 4.22S
143 0 0 -31 43 35.5 12 6 56 52 284 0.77 186.1 177.35 4.34S
143 30 0 -31 41 3.5 12 7 50 52 284 0.79 186.0 177.23 4.47S
144 0 0 -31 38 22.8 12 8 42 51 283 0.80 185.8 177.10 4.59S
144 30 0 -31 35 33.4 12 9 34 51 282 0.82 185.7 176.98 4.72S
145 0 0 -31 32 35.3 12 10 26 50 282 0.84 185.6 176.86 4.84S
145 30 0 -31 29 28.8 12 11 16 49 281 0.86 185.5 176.74 4.96S
146 0 0 -31 26 13.9 12 12 7 49 281 0.87 185.4 176.62 5.07S
146 30 0 -31 22 50.8 12 12 57 48 280 0.89 185.2 176.50 5.19S
147 0 0 -31 19 19.4 12 13 46 48 280 0.91 185.1 176.39 5.30S
147 30 0 -31 15 40.0 12 14 35 47 279 0.93 185.0 176.28 5.42S
148 0 0 -31 11 52.7 12 15 23 47 279 0.95 184.9 176.17 5.53S
148 30 0 -31 7 57.5 12 16 11 46 278 0.97 184.8 176.06 5.63S
149 0 0 -31 3 54.5 12 16 58 45 278 0.99 184.7 175.95 5.74S
149 30 0 -30 59 43.8 12 17 44 45 277 1.01 184.6 175.85 5.85S
150 0 0 -30 55 25.6 12 18 30 44 277 1.03 184.5 175.75 5.95S
150 30 0 -30 51 0.0 12 19 16 44 276 1.05 184.4 175.64 6.05S
151 0 0 -30 46 27.0 12 20 1 43 276 1.07 184.3 175.54 6.15S
151 30 0 -30 41 46.8 12 20 45 42 275 1.09 184.2 175.45 6.25S
152 0 0 -30 36 59.5 12 21 29 42 275 1.11 184.1 175.35 6.34S
152 30 0 -30 32 5.1 12 22 12 41 274 1.14 184.0 175.26 6.44S
153 0 0 -30 27 3.8 12 22 55 41 274 1.16 183.9 175.16 6.53S
153 30 0 -30 21 55.8 12 23 37 40 273 1.19 183.8 175.07 6.62S
154 0 0 -30 16 41.0 12 24 18 40 273 1.21 183.7 174.98 6.71S
154 30 0 -30 11 19.6 12 24 59 39 272 1.23 183.6 174.90 6.80S
155 0 0 -30 5 51.7 12 25 40 38 272 1.26 183.5 174.81 6.88S
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 4 meters [Estimated]
2372 is triple:
AB 4.3 12.9 42" 37.0 (BU 626) Graze path of B approximately 65.4 km south, and 63.0 secs later compared to A
- refer to graze profile for exact distances
AC 4.4 10.8 120" 320.1 (BU 626) Graze path of C approximately 154.5 km south, and 247.3 secs earlier 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 -3.91 Lat -6.97
P +177.30 D -6.92
Illumination of moon 66%+
Elongation of Moon 109
Vertical Profile Scale approx. 1.92 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.33 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
0.8 2.9 4.3 5.1 5.6 5.9 6.1 6.3
2.8 4.8 6.3 7.1 7.6 7.9 8.2 8.4
4.8 5.0 6.4 7.2 7.7 8.1 8.3 8.5
6.8 5.7 7.1 7.9 8.5 8.8 9.1 9.3
8.8 5.7 7.2 8.0 8.5 8.8 9.1 9.3
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Adelaide 138.6 -34.6 288km 11 58 46.9
AU Mid 143.0 -30.6 124km 12 6 56.4
Brisbane 153.1 -27.5 324km 12 22 58.8
Newcastle 151.7 -33.0 249km 12 21 4.0
Perth 115.9 -32.0 247km 11 6 41.4
Pt Macquarie 152.8 -31.4 100km 12 22 40.4
Sydney 151.1 -33.8 335km 12 20 6.6
Lunar Limb Profile
