Predictions for Grazing Occultation of ZC 1925, 2006 Aug 28
Grazing Occultation of 1925 SB1 Magnitude 1.0v
1925 = Spica = alpha Virginis
Date 2006 August 28 (Monday) Nominal site altitude 0m
E. Longit. Latitude U.T. Sun Moon TanZ PA WA CA
o ' " o ' " h m s Alt Alt Az o o o
114 0 0 -31 30 38 7 59 20 24 68 336 0.40 41.3 21.08 17.51N
114 10 0 -31 37 44 7 59 54 24 68 335 0.41 41.2 21.01 17.43N
114 20 0 -31 44 46 8 0 28 24 68 335 0.41 41.1 20.93 17.36N
114 30 0 -31 51 45 8 1 2 24 67 334 0.41 41.1 20.85 17.28N
114 40 0 -31 58 41 8 1 35 23 67 333 0.42 41.0 20.78 17.20N
114 50 0 -32 5 33 8 2 9 23 67 333 0.42 40.9 20.70 17.13N
115 0 0 -32 12 23 8 2 42 23 67 332 0.43 40.8 20.62 17.05N
115 10 0 -32 19 9 8 3 15 22 67 332 0.43 40.7 20.55 16.97N
115 20 0 -32 25 51 8 3 48 22 66 331 0.44 40.7 20.47 16.89N
115 30 0 -32 32 31 8 4 20 22 66 331 0.44 40.6 20.39 16.82N
115 40 0 -32 39 7 8 4 53 22 66 330 0.45 40.5 20.32 16.74N
115 50 0 -32 45 40 8 5 25 21 66 330 0.45 40.4 20.24 16.66N
116 0 0 -32 52 10 8 5 57 21 65 329 0.46 40.4 20.16 16.58N
116 10 0 -32 58 37 8 6 29 21 65 328 0.46 40.3 20.08 16.51N
116 20 0 -33 5 1 8 7 0 20 65 328 0.47 40.2 20.01 16.43N
116 30 0 -33 11 21 8 7 32 20 65 327 0.47 40.1 19.93 16.35N
116 40 0 -33 17 39 8 8 3 20 65 327 0.47 40.0 19.85 16.27N
116 50 0 -33 23 53 8 8 35 20 64 327 0.48 40.0 19.77 16.20N
117 0 0 -33 30 5 8 9 6 19 64 326 0.48 39.9 19.69 16.12N
117 10 0 -33 36 13 8 9 36 19 64 326 0.49 39.8 19.62 16.04N
117 20 0 -33 42 18 8 10 7 19 64 325 0.49 39.7 19.54 15.96N
117 30 0 -33 48 20 8 10 38 19 63 325 0.50 39.7 19.46 15.88N
117 40 0 -33 54 20 8 11 8 18 63 324 0.50 39.6 19.38 15.81N
117 50 0 -34 0 16 8 11 38 18 63 324 0.51 39.5 19.31 15.73N
Path coordinates are referred to WGS84 (as used by GPS).
1925 is multiple : 1.3 4.5 0.050" 225.0 : 1.3 7.5 0.50" 180.0 : 0.9 12.0 148" 32.0
Graze Path of component #2 0.09km North, and 0.0 secs. earlier cf. primary.
Graze Path of component #3 0.71km North, and 1.0 secs. later cf. primary.
Graze Path of component #4 268.51km South, and 58.5 secs. earlier cf. primary.
1925 = alf Vir, 0.95 +/- 0.10 V , Type ELL+BCEP, Period 4.014604 days, Phase 0.24
Librations Long -4.26 Lat +3.00
P +19.1 D -4.0
Illumination of moon 17%+
Elongation of Moon 49
Vertical Profile Scale 1.92 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.28 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
11.7 2.9 4.3 5.1 5.6 5.9 6.1 6.3
13.7 2.9 4.3 5.1 5.6 5.9 6.1 6.3
15.7 2.9 4.3 5.1 5.6 5.9 6.1 6.3
17.7 2.9 4.3 5.1 5.6 5.9 6.1 6.3
19.7 2.9 4.3 5.1 5.6 5.9 6.1 6.3
Lunar Limb Profile for graze south of Perth
