Predictions for Grazing Occultation of ZC2690, 2016 Apr 27
Graze profile
Grazing Occultation of 2690 B0 Magnitude 6.8 [Red = 6.6] v
Date: 2016 Apr 27 13h 59m, to 2016 Apr 27 14h 21m
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 -18 24 10.3 13 58 48 17 104 3.32 186.6 190.49 12.87S
135 30 0 -18 34 54.3 13 59 7 17 104 3.20 186.6 190.49 12.87S
136 0 0 -18 45 38.8 13 59 27 18 104 3.09 186.6 190.50 12.88S
136 30 0 -18 56 23.3 13 59 48 19 104 2.99 186.6 190.50 12.88S
137 0 0 -19 7 7.9 14 0 10 19 103 2.89 186.6 190.50 12.88S
137 30 0 -19 17 52.3 14 0 32 20 103 2.80 186.6 190.50 12.88S
138 0 0 -19 28 36.6 14 0 55 20 103 2.71 186.6 190.49 12.87S
138 30 0 -19 39 20.5 14 1 19 21 103 2.63 186.6 190.49 12.87S
139 0 0 -19 50 4.0 14 1 44 21 103 2.55 186.6 190.49 12.87S
139 30 0 -20 0 47.0 14 2 9 22 102 2.47 186.6 190.48 12.86S
140 0 0 -20 11 29.4 14 2 35 23 102 2.40 186.6 190.47 12.85S
140 30 0 -20 22 11.0 14 3 1 23 102 2.33 186.6 190.47 12.85S
141 0 0 -20 32 51.8 14 3 29 24 102 2.26 186.5 190.46 12.84S
141 30 0 -20 43 31.6 14 3 57 24 101 2.20 186.5 190.45 12.83S
142 0 0 -20 54 10.3 14 4 25 25 101 2.14 186.5 190.43 12.81S
142 30 0 -21 4 47.8 14 4 55 26 101 2.08 186.5 190.42 12.80S
143 0 0 -21 15 23.9 14 5 25 26 101 2.03 186.5 190.41 12.79S
143 30 0 -21 25 58.5 14 5 56 27 100 1.97 186.5 190.39 12.77S
144 0 0 -21 36 31.6 14 6 27 27 100 1.92 186.5 190.37 12.75S
144 30 0 -21 47 2.9 14 7 0 28 100 1.87 186.4 190.35 12.73S
145 0 0 -21 57 32.3 14 7 33 29 100 1.83 186.4 190.33 12.71S
145 30 0 -22 7 59.7 14 8 6 29 99 1.78 186.4 190.31 12.69S
146 0 0 -22 18 24.9 14 8 41 30 99 1.74 186.4 190.29 12.67S
146 30 0 -22 28 47.9 14 9 16 31 99 1.69 186.4 190.27 12.65S
147 0 0 -22 39 8.4 14 9 52 31 98 1.65 186.3 190.24 12.62S
147 30 0 -22 49 26.4 14 10 29 32 98 1.61 186.3 190.21 12.59S
148 0 0 -22 59 41.7 14 11 6 32 98 1.58 186.3 190.18 12.56S
148 30 0 -23 9 54.0 14 11 44 33 98 1.54 186.2 190.15 12.53S
149 0 0 -23 20 3.4 14 12 23 34 97 1.50 186.2 190.12 12.50S
149 30 0 -23 30 9.6 14 13 2 34 97 1.47 186.2 190.08 12.46S
150 0 0 -23 40 12.5 14 13 43 35 97 1.43 186.1 190.05 12.43S
150 30 0 -23 50 11.9 14 14 23 36 96 1.40 186.1 190.00 12.38S
151 0 0 -24 0 7.6 14 15 5 36 96 1.37 186.0 189.96 12.34S
151 30 0 -24 9 59.6 14 15 47 37 96 1.34 186.0 189.91 12.30S
152 0 0 -24 19 47.7 14 16 30 37 95 1.31 186.0 189.87 12.25S
152 30 0 -24 29 31.6 14 17 14 38 95 1.28 185.9 189.82 12.20S
153 0 0 -24 39 11.3 14 17 58 39 94 1.25 185.9 189.77 12.16S
153 30 0 -24 48 46.6 14 18 43 39 94 1.22 185.8 189.72 12.11S
154 0 0 -24 58 17.2 14 19 29 40 94 1.19 185.8 189.67 12.05S
154 30 0 -25 7 43.2 14 20 16 41 93 1.17 185.7 189.62 12.00S
155 0 0 -25 17 4.2 14 21 3 41 93 1.14 185.6 189.56 11.94S
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.
2690 is variable:
2690 = V4398 Sgr, 6.89 to 6.93, Hp, Type ACYG, Period 2.42048 days, Phase 18 %
Librations Long -5.76 Lat -6.55
P +190.96 D -5.15
Illumination of moon 75%-
Elongation of Moon 119
Vertical Profile Scale approx. 1.91 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.62 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
8.7 5.4 6.8 7.5 8.0 8.3 8.5 8.7
10.7 5.4 6.8 7.6 8.0 8.3 8.5 8.7
12.7 5.4 6.8 7.6 8.0 8.3 8.6 8.7
14.7 5.4 6.8 7.6 8.0 8.4 8.6 8.7
16.7 5.4 6.8 7.6 8.1 8.4 8.6 8.7
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Brisbane 153.1 -27.5 292km 14 18 3.0
Bundaberg 152.3 -24.8 38km 14 16 59.5
Rockhampton 150.5 -23.4 49km 14 14 23.5
Lunar Limb Profile
