Predictions for Grazing Occultation of ZC 2724, 2012 Aug 27
Graze profile
Grazing Occultation of 2724 M2 Magnitude 6.3 [Red = 5.5] v
Date: 2012 Aug 27 8h 36m, to 2012 Aug 27 8h 48m
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
168 0 0 -43 57 38 8 35 48 65 20 0.47 169.0 172.49 9.06S
168 10 0 -43 56 32 8 36 5 65 19 0.47 169.0 172.44 9.11S
168 20 0 -43 55 25 8 36 22 65 19 0.47 169.0 172.40 9.15S
168 30 0 -43 54 17 8 36 38 65 18 0.47 168.9 172.36 9.19S
168 40 0 -43 53 8 8 36 55 65 18 0.47 168.9 172.32 9.23S
168 50 1 -43 51 57 8 37 12 65 17 0.46 168.8 172.28 9.27S
169 0 1 -43 50 46 8 37 29 65 17 0.46 168.8 172.24 9.31S
169 10 1 -43 49 33 8 37 46 65 16 0.46 168.7 172.20 9.35S
169 20 1 -43 48 20 8 38 2 65 16 0.46 168.7 172.16 9.39S
169 30 1 -43 47 5 8 38 19 65 15 0.46 168.7 172.13 9.42S
169 40 1 -43 45 50 8 38 36 65 15 0.46 168.6 172.09 9.46S
169 50 1 -43 44 33 8 38 53 65 14 0.46 168.6 172.05 9.50S
170 0 1 -43 43 15 8 39 10 66 14 0.45 168.6 172.01 9.54S
170 10 2 -43 41 56 8 39 27 66 13 0.45 168.5 171.97 9.58S
170 20 2 -43 40 36 8 39 44 66 13 0.45 168.5 171.93 9.62S
170 30 2 -43 39 15 8 40 1 66 12 0.45 168.4 171.89 9.66S
170 40 2 -43 37 52 8 40 18 66 11 0.45 168.4 171.85 9.70S
170 50 2 -43 36 29 8 40 35 66 11 0.45 168.4 171.81 9.74S
171 0 2 -43 35 5 8 40 52 66 10 0.45 168.3 171.77 9.78S
171 10 2 -43 33 39 8 41 10 66 10 0.45 168.3 171.73 9.82S
171 20 2 -43 32 13 8 41 27 66 9 0.45 168.2 171.69 9.86S
171 30 3 -43 30 45 8 41 44 66 9 0.44 168.2 171.65 9.90S
171 40 3 -43 29 16 8 42 1 66 8 0.44 168.2 171.61 9.94S
171 50 3 -43 27 46 8 42 19 66 8 0.44 168.1 171.57 9.98S
172 0 3 -43 26 15 8 42 36 66 7 0.44 168.1 171.53 10.02S
172 10 3 -43 24 43 8 42 53 66 7 0.44 168.0 171.49 10.06S
172 20 3 -43 23 10 8 43 11 66 6 0.44 168.0 171.45 10.10S
172 30 3 -43 21 36 8 43 28 66 6 0.44 168.0 171.40 10.14S
172 40 3 -43 20 0 8 43 45 66 5 0.44 167.9 171.36 10.18S
172 50 3 -43 18 24 8 44 3 66 4 0.44 167.9 171.32 10.22S
173 0 4 -43 16 46 8 44 20 66 4 0.44 167.8 171.28 10.26S
173 10 4 -43 15 7 8 44 38 67 3 0.43 167.8 171.24 10.30S
173 20 4 -43 13 27 8 44 55 67 3 0.43 167.8 171.20 10.34S
173 30 4 -43 11 46 8 45 13 67 2 0.43 167.7 171.16 10.38S
173 40 4 -43 10 4 8 45 30 67 2 0.43 167.7 171.12 10.42S
173 50 4 -43 8 21 8 45 48 67 1 0.43 167.6 171.08 10.46S
174 0 4 -43 6 37 8 46 6 67 0 0.43 167.6 171.04 10.50S
174 10 4 -43 4 51 8 46 23 67 360 0.43 167.6 171.00 10.54S
174 20 5 -43 3 5 8 46 41 67 359 0.43 167.5 170.96 10.58S
174 30 5 -43 1 17 8 46 59 67 359 0.43 167.5 170.92 10.62S
174 40 5 -42 59 28 8 47 16 67 358 0.43 167.4 170.88 10.66S
174 50 5 -42 57 38 8 47 34 67 358 0.43 167.4 170.84 10.70S
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 5 meters [Estimated]
2724 is variable:
2724 = V4405 Sgr, 6.2 to 6.33, Hp, Type SRB
Librations Long +3.11 Lat -4.67
P +171.40 D -3.90
Illumination of moon 80%+
Elongation of Moon 126
Vertical Profile Scale 2.03 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.42 deg/min
At longitude 171.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
5.9 4.8 6.2 7.0 7.5 7.9 8.1 8.3
7.9 5.3 6.8 7.6 8.1 8.5 8.7 8.9
9.9 5.7 7.1 7.9 8.5 8.8 9.1 9.3
11.9 5.7 7.1 7.9 8.5 8.8 9.1 9.3
13.9 5.7 7.1 7.9 8.5 8.8 9.1 9.3
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Chch graze 172.6 -43.5 21km 8 43 42
Dunedin 170.5 -45.9 242km 8 40 1
MidNZ 173.0 -41.0 247km 8 44 20
Wellington 174.8 -41.3 179km 8 47 30
Lunar Limb Profile
