Predictions for Grazing Occultation of ZC 2680, 2013 Aug 17 near Millicent, SA and Newcastle
Graze profile Millicent | Newcastle
Grazing Occultation of 2680cK0 Magnitude 5.6 [Red = 5.1]
Date: 2013 Aug 17 16h 31m, to 2013 Aug 17 16h 46m
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
133 0 0 -40 44 4 16 31 25 28 268 1.92 167.1 169.34 14.16S
133 30 0 -40 30 45 16 31 56 27 268 1.96 167.1 169.33 14.17S
134 0 0 -40 17 25 16 32 27 27 267 2.00 167.1 169.33 14.17S
134 30 0 -40 4 4 16 32 57 26 267 2.04 167.1 169.33 14.17S
135 0 0 -39 50 44 16 33 27 26 266 2.09 167.1 169.33 14.17S
135 30 0 -39 37 24 16 33 56 25 266 2.14 167.1 169.33 14.17S
136 0 0 -39 24 5 16 34 25 25 265 2.18 167.1 169.34 14.16S
136 30 0 -39 10 46 16 34 53 24 265 2.24 167.1 169.34 14.16S
137 0 0 -38 57 27 16 35 21 24 264 2.29 167.1 169.34 14.15S
137 30 0 -38 44 10 16 35 48 23 264 2.34 167.1 169.35 14.15S
138 0 0 -38 30 54 16 36 15 23 263 2.40 167.2 169.36 14.14S
138 30 0 -38 17 39 16 36 41 22 263 2.46 167.2 169.37 14.13S
139 0 0 -38 4 25 16 37 6 22 263 2.53 167.2 169.37 14.12S
139 30 0 -37 51 14 16 37 31 21 262 2.59 167.2 169.38 14.11S
140 0 0 -37 38 3 16 37 56 21 262 2.66 167.2 169.40 14.10S
140 30 0 -37 24 55 16 38 20 20 261 2.73 167.2 169.41 14.09S
141 0 0 -37 11 49 16 38 43 20 261 2.81 167.2 169.42 14.08S
141 30 0 -36 58 45 16 39 6 19 261 2.89 167.2 169.43 14.07S
142 0 0 -36 45 43 16 39 28 19 260 2.97 167.2 169.45 14.05S
142 30 0 -36 32 44 16 39 49 18 260 3.06 167.3 169.46 14.03S
143 0 0 -36 19 47 16 40 10 18 259 3.16 167.3 169.48 14.02S
143 30 0 -36 6 53 16 40 31 17 259 3.26 167.3 169.50 14.00S
144 0 0 -35 54 2 16 40 51 17 259 3.36 167.3 169.52 13.98S
144 30 0 -35 41 14 16 41 10 16 258 3.47 167.3 169.53 13.96S
145 0 0 -35 28 29 16 41 29 16 258 3.59 167.4 169.55 13.94S
145 30 0 -35 15 47 16 41 47 15 257 3.72 167.4 169.57 13.92S
146 0 0 -35 3 9 16 42 5 15 257 3.85 167.4 169.60 13.90S
146 30 0 -34 50 34 16 42 21 14 257 4.00 167.4 169.62 13.88S
147 0 0 -34 38 3 16 42 38 14 256 4.15 167.4 169.64 13.86S
147 30 0 -34 25 35 16 42 54 13 256 4.32 167.5 169.66 13.84S
148 0 0 -34 13 11 16 43 9 13 256 4.50 167.5 169.69 13.81S
148 30 0 -34 0 50 16 43 24 12 255 4.69 167.5 169.71 13.79S
149 0 0 -33 48 34 16 43 38 12 255 4.90 167.5 169.74 13.76S
149 30 0 -33 36 22 16 43 51 11 255 5.13 167.6 169.76 13.74S
150 0 0 -33 24 13 16 44 4 11 254 5.38 167.6 169.79 13.71S
150 30 0 -33 12 9 16 44 16 10 254 5.65 167.6 169.82 13.68S
151 0 0 -33 0 9 16 44 28 10 254 5.95 167.6 169.84 13.65S
151 30 0 -32 48 13 16 44 39 9 254 6.29 167.7 169.87 13.63S
152 0 0 -32 36 22 16 44 50 9 253 6.66 167.7 169.90 13.60S
152 30 0 -32 24 35 16 45 0 8 253 7.07 167.7 169.93 13.57S
153 0 0 -32 12 52 16 45 10 8 253 7.54 167.8 169.96 13.54S
153 30 0 -32 1 15 16 45 19 7 252 8.07 167.8 169.99 13.51S
154 0 0 -31 49 41 16 45 27 7 252 8.68 167.8 170.02 13.48S
154 30 0 -31 38 12 16 45 35 6 252 9.39 167.9 170.05 13.45S
155 0 0 -31 26 48 16 45 42 6 251 10.21 167.9 170.09 13.41S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
Projected diameter of star 3 meters [Estimated]
2680 is double:
This next pair is not confirmed
** 6.6 6.6 0.10" 322.0** (OCc 988) Graze path of ? 0.22 km south, and 0.1 secs earlier compared to the primary
Librations Long -2.57 Lat -6.06
P +169.73 D -6.17
Illumination of moon 84%+
Elongation of Moon 132
Vertical Profile Scale 2.33 km/arcsec at mean distance of moon
Horizontal Scale Factor 2.08 deg/min
At longitude 144.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
10.0 4.9 6.2 6.9 7.3 7.5 7.7 7.8
12.0 4.9 6.2 6.9 7.3 7.6 7.7 7.8
14.0 4.9 6.3 6.9 7.3 7.6 7.7 7.8
16.0 4.9 6.3 6.9 7.3 7.6 7.7 7.9
18.0 4.9 6.3 7.0 7.4 7.6 7.8 7.9
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
18302-1844OCC 988 0 6.6 6.6 +035-091 -18 4982 183011.84-184342.9
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Interferometric catalogue entries
183011.84-184342.9 BD-18 4982 OCC 988 HD 170433 HIP 90687 18302-1844
Date PA Sep M1 M2
1997. V322. . 0.1 . 6.6 . 6.6 . 1 OCC2002 O
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Bendigo 144.3 -36.8 102km 16 41 4
Canberra 149.2 -35.3 153km 16 43 42
Melbourne 145.0 -37.8 228km 16 41 28
Lunar Limb Profile - near Millicent, SA
Lunar Limb Profile - near Newcastle
