Predictions for Grazing Occultation of ZC 1486, 2009 Mar 9
Grazing Occultation of 1486dK4 Magnitude 4.4 [Red = 3.6]
R1486 = 31 Leonis = A Leonis
Date: 2009 Mar 09 17h 51m, to 2009 Mar 09 18h 0m
Nominal site altitude 5m
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 -32 37 30 17 51 43 20 297 2.74 34.2 15.05 18.57N
135 30 0 -32 49 6 17 52 6 20 296 2.82 34.1 14.92 18.45N
136 0 0 -33 0 31 17 52 29 19 296 2.91 34.0 14.79 18.32N
136 30 0 -33 11 44 17 52 50 18 296 3.00 33.8 14.67 18.20N
137 0 0 -33 22 46 17 53 11 18 295 3.09 33.7 14.55 18.08N
137 30 0 -33 33 37 17 53 32 17 295 3.19 33.6 14.43 17.96N
138 0 0 -33 44 18 17 53 52 17 295 3.29 33.5 14.31 17.84N
138 30 0 -33 54 48 17 54 11 16 294 3.40 33.3 14.19 17.72N
139 0 0 -34 5 7 17 54 29 16 294 3.51 33.2 14.07 17.60N
139 30 0 -34 15 16 17 54 47 15 294 3.64 33.1 13.95 17.48N
140 0 0 -34 25 15 17 55 5 15 293 3.76 33.0 13.83 17.36N
140 30 0 -34 35 3 17 55 22 14 293 3.90 32.9 13.72 17.25N
141 0 0 -34 44 42 17 55 38 14 293 4.05 32.8 13.60 17.14N
141 30 0 -34 54 11 17 55 53 13 292 4.20 32.7 13.49 17.02N
142 0 0 -35 3 30 17 56 9 13 292 4.36 32.5 13.38 16.91N
142 30 0 -35 12 40 17 56 23 12 292 4.54 32.4 13.26 16.80N
143 0 0 -35 21 40 17 56 37 12 291 4.73 32.3 13.15 16.69N
143 30 0 -35 30 31 17 56 51 11 291 4.93 32.2 13.04 16.58N
144 0 0 -35 39 12 17 57 4 11 291 5.15 32.1 12.93 16.47N
144 30 0 -35 47 45 17 57 16 11 290 5.38 32.0 12.83 16.36N
145 0 0 -35 56 8 17 57 28 10 290 5.64 31.9 12.72 16.26N
145 30 0 -36 4 23 17 57 40 10 290 5.92 31.8 12.61 16.15N
146 0 0 -36 12 29 17 57 51 9 289 6.22 31.7 12.51 16.04N
146 30 0 -36 20 26 17 58 2 9 289 6.55 31.6 12.40 15.94N
147 0 0 -36 28 15 17 58 12 8 289 6.92 31.5 12.30 15.84N
147 30 0 -36 35 55 17 58 21 8 288 7.33 31.4 12.20 15.73N
148 0 0 -36 43 27 17 58 31 7 288 7.79 31.3 12.09 15.63N
148 30 0 -36 50 51 17 58 39 7 288 8.30 31.2 11.99 15.53N
149 0 0 -36 58 6 17 58 48 6 288 8.88 31.1 11.89 15.43N
149 30 0 -37 5 14 17 58 56 6 287 9.54 31.0 11.79 15.33N
150 0 0 -37 12 13 17 59 3 6 287 10.31 30.9 11.69 15.24N
150 30 0 -37 19 5 17 59 10 5 287 11.20 30.8 11.60 15.14N
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 9 meters
1486 is double:
AB 4.4 13.6 8.8" 39.3 Graze path of B 17.39 km south, and 2.0 secs later compared to A
Librations Long +2.05 Lat +2.29
P +12.89 D -1.51
Illumination of moon 97%+
Elongation of Moon 161
Vertical Profile Scale 1.92 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.94 deg/min
At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
12.4 3.0 4.3 4.8 5.1 5.3 5.4 5.5
14.4 3.4 4.7 5.3 5.6 5.8 5.9 5.9
16.4 3.5 4.7 5.3 5.6 5.8 5.9 6.0
18.4 3.5 4.7 5.3 5.6 5.8 5.9 6.0
20.4 3.5 4.7 5.3 5.6 5.8 5.9 6.0
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