Predictions for Grazing Occultation of ZC1855, 2015 Apr 4
Graze profile
Grazing Occultation of 1855DA0 Magnitude 7.2 [Red = 7.1]
Date: 2015 Apr 04 12h 26m, to 2015 Apr 04 13h 28m
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 -15 54 40 12 26 22 49 79 0.87 28.2 3.95 -58.84N
135 30 0 -16 10 4 12 27 35 50 78 0.84 28.3 4.07 -59.02N
136 0 0 -16 25 39 12 28 50 51 78 0.82 28.4 4.18 -59.19N
136 30 0 -16 41 26 12 30 5 51 77 0.80 28.5 4.29 -59.35N
137 0 0 -16 57 23 12 31 22 52 76 0.78 28.6 4.39 -59.52N
137 30 0 -17 13 31 12 32 41 53 75 0.76 28.7 4.49 -59.68N
138 0 0 -17 29 49 12 34 0 53 74 0.74 28.8 4.59 -59.84N
138 30 0 -17 46 17 12 35 21 54 73 0.73 28.9 4.69 -60.00N
139 0 0 -18 2 55 12 36 43 55 73 0.71 29.0 4.78 -60.15N
139 30 0 -18 19 42 12 38 7 55 72 0.69 29.1 4.87 -60.30N
140 0 0 -18 36 38 12 39 31 56 70 0.67 29.2 4.95 -60.45N
140 30 0 -18 53 42 12 40 57 57 69 0.66 29.2 5.03 -60.59N
141 0 0 -19 10 55 12 42 24 57 68 0.64 29.3 5.11 -60.73N
141 30 0 -19 28 15 12 43 53 58 67 0.62 29.4 5.19 -60.87N
142 0 0 -19 45 42 12 45 22 59 66 0.61 29.5 5.26 -61.00N
142 30 0 -20 3 16 12 46 52 59 64 0.59 29.5 5.32 -61.13N
143 0 0 -20 20 56 12 48 24 60 63 0.58 29.6 5.38 -61.25N
143 30 0 -20 38 42 12 49 56 61 62 0.57 29.6 5.44 -61.37N
144 0 0 -20 56 32 12 51 30 61 60 0.55 29.7 5.49 -61.48N
144 30 0 -21 14 27 12 53 4 62 59 0.54 29.7 5.54 -61.58N
145 0 0 -21 32 26 12 54 39 62 57 0.53 29.8 5.58 -61.68N
145 30 0 -21 50 27 12 56 15 63 55 0.52 29.8 5.62 -61.78N
146 0 0 -22 8 32 12 57 52 63 53 0.50 29.9 5.65 -61.87N
146 30 0 -22 26 38 12 59 29 64 52 0.49 29.9 5.67 -61.95N
147 0 0 -22 44 45 13 1 7 64 50 0.48 29.9 5.69 -62.03N
147 30 0 -23 2 53 13 2 46 65 48 0.47 29.9 5.71 -62.10N
148 0 0 -23 21 0 13 4 25 65 46 0.47 29.9 5.71 -62.16N
148 30 0 -23 39 7 13 6 5 65 44 0.46 29.9 5.72 -62.21N
149 0 0 -23 57 13 13 7 45 66 41 0.45 29.9 5.71 -62.26N
149 30 0 -24 15 16 13 9 26 66 39 0.44 29.9 5.70 -62.31N
150 0 0 -24 33 16 13 11 6 66 37 0.44 29.9 5.69 -62.34N
150 30 0 -24 51 13 13 12 47 67 34 0.43 29.9 5.67 -62.37N
151 0 0 -25 9 5 13 14 28 67 32 0.43 29.9 5.64 -62.39N
151 30 0 -25 26 53 13 16 9 67 30 0.42 29.8 5.61 -62.41N
152 0 0 -25 44 36 13 17 51 67 27 0.42 29.8 5.58 -62.42N
152 30 0 -26 2 12 13 19 32 67 25 0.42 29.7 5.53 -62.42N
153 0 0 -26 19 42 13 21 13 67 22 0.42 29.7 5.48 -62.42N
153 30 0 -26 37 5 13 22 54 67 20 0.42 29.6 5.43 -62.40N
154 0 0 -26 54 20 13 24 34 67 17 0.42 29.6 5.37 -62.39N
154 30 0 -27 11 28 13 26 15 67 15 0.42 29.5 5.31 -62.36N
155 0 0 -27 28 26 13 27 54 67 12 0.42 29.4 5.24 -62.33N
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.
1855 is double:
AB 7.2 8.9 5.9" 149.0 (STF1690) Graze path of B 5.54 km north, and 16.2 secs later compared to A
Librations Long -2.71 Lat -0.95
P +5.63 D +0.94
Illumination of moon 35%E
Elongation of Moon 179
Vertical Profile Scale 2.01 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.23 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-65.7 10.6 11.3 11.9 12.5 13.1 13.8 14.4
-63.7 10.6 11.3 11.9 12.5 13.1 13.8 14.4
-61.7 10.6 11.3 11.9 12.5 13.1 13.8 14.4
-59.7 10.6 11.3 11.9 12.5 13.1 13.8 14.4
-57.7 10.6 11.3 11.9 12.5 13.1 13.8 14.4
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
AU Mid 143.0 -30.6 937km 12 48 24
Brisbane 153.1 -27.5 103km 13 21 23
Bundaberg 152.3 -24.8 106km 13 18 58
Rockhampton 150.5 -23.4 139km 13 12 47
Lunar Limb Profile
