Predictions for Grazing Occultation of ZC 2307, 2012 Jul 28
Graze profile
Grazing Occultation of ZC 2307 B1, Magnitude 3.9 [Red = 4.0]
R2307 = Kow Kin = omega 1 Scorpii
Date: 2012 Jul 28 13h 3m, to 2012 Jul 28 13h 6m
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
173 0 0 -38 44 39 13 3 14 25 263 2.11 179.0 166.62 12.08S
173 10 0 -38 41 12 13 3 22 25 263 2.13 179.0 166.60 12.10S
173 20 0 -38 37 45 13 3 30 25 263 2.15 178.9 166.59 12.11S
173 30 0 -38 34 17 13 3 38 25 263 2.16 178.9 166.58 12.12S
173 40 0 -38 30 48 13 3 45 25 262 2.18 178.9 166.57 12.14S
173 50 1 -38 27 19 13 3 53 24 262 2.19 178.9 166.55 12.15S
174 0 1 -38 23 50 13 4 1 24 262 2.21 178.9 166.54 12.16S
174 10 1 -38 20 20 13 4 8 24 262 2.23 178.9 166.53 12.17S
174 20 1 -38 16 50 13 4 16 24 262 2.24 178.9 166.52 12.18S
174 30 1 -38 13 19 13 4 23 24 262 2.26 178.9 166.51 12.19S
174 40 1 -38 9 48 13 4 31 24 262 2.28 178.9 166.50 12.20S
174 50 1 -38 6 16 13 4 38 24 261 2.30 178.8 166.49 12.22S
175 0 1 -38 2 44 13 4 46 23 261 2.32 178.8 166.47 12.23S
175 10 2 -37 59 11 13 4 53 23 261 2.33 178.8 166.46 12.24S
175 20 2 -37 55 39 13 5 0 23 261 2.35 178.8 166.45 12.25S
175 30 2 -37 52 5 13 5 7 23 261 2.37 178.8 166.44 12.26S
175 40 2 -37 48 32 13 5 15 23 261 2.39 178.8 166.43 12.27S
175 50 2 -37 44 57 13 5 22 23 261 2.41 178.8 166.42 12.28S
176 0 2 -37 41 23 13 5 29 22 260 2.43 178.8 166.41 12.29S
176 10 2 -37 37 48 13 5 36 22 260 2.45 178.8 166.40 12.30S
176 20 2 -37 34 13 13 5 43 22 260 2.47 178.7 166.39 12.31S
176 30 3 -37 30 37 13 5 50 22 260 2.49 178.7 166.38 12.32S
176 40 3 -37 27 1 13 5 57 22 260 2.51 178.7 166.37 12.33S
176 50 3 -37 23 24 13 6 4 22 260 2.53 178.7 166.36 12.34S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
Librations Long -1.14 Lat -0.54
P +166.48 D -0.53
Illumination of moon 73%+
Elongation of Moon 118
Vertical Profile Scale 2.06 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.92 deg/min
At longitude 175.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
8.2 5.2 6.6 7.4 7.8 8.1 8.3 8.4
10.2 5.3 6.7 7.4 7.8 8.1 8.3 8.5
12.2 5.3 6.7 7.4 7.8 8.1 8.3 8.5
14.2 5.3 6.7 7.4 7.9 8.2 8.3 8.5
16.2 5.3 6.7 7.4 7.9 8.2 8.4 8.5
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Auckland 174.8 -36.9 123km 13 4 37
MidNZ 173.0 -41.0 227km 13 3 14
Wellington 174.8 -41.3 319km 13 4 37
Lunar Limb Profile
