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
145 0 0 -42 15 48 9 4 19 32 285 1.58 29.0 8.80 5.22N
145 10 0 -42 16 47 9 4 31 32 285 1.59 28.9 8.75 5.17N
145 20 0 -42 17 44 9 4 43 32 285 1.60 28.9 8.71 5.12N
145 30 0 -42 18 41 9 4 54 32 285 1.61 28.8 8.66 5.07N
145 40 0 -42 19 36 9 5 6 32 285 1.62 28.8 8.61 5.02N
145 50 0 -42 20 31 9 5 17 32 284 1.63 28.8 8.56 4.98N
146 0 0 -42 21 24 9 5 28 31 284 1.64 28.7 8.51 4.93N
146 10 0 -42 22 16 9 5 40 31 284 1.65 28.7 8.47 4.88N
146 20 0 -42 23 7 9 5 51 31 284 1.66 28.6 8.42 4.83N
146 30 0 -42 23 57 9 6 2 31 284 1.67 28.6 8.37 4.79N
146 40 0 -42 24 46 9 6 13 31 284 1.68 28.5 8.33 4.74N
146 50 0 -42 25 34 9 6 24 31 283 1.69 28.5 8.28 4.69N
147 0 0 -42 26 21 9 6 35 30 283 1.70 28.4 8.23 4.65N
147 10 0 -42 27 7 9 6 46 30 283 1.71 28.4 8.19 4.60N
147 20 0 -42 27 52 9 6 57 30 283 1.72 28.3 8.14 4.55N
147 30 0 -42 28 35 9 7 7 30 283 1.73 28.3 8.09 4.51N
147 40 0 -42 29 18 9 7 18 30 283 1.74 28.2 8.05 4.46N
147 50 0 -42 30 0 9 7 29 30 283 1.75 28.2 8.00 4.42N
148 0 0 -42 30 40 9 7 39 30 282 1.77 28.1 7.96 4.37N
148 10 0 -42 31 20 9 7 50 29 282 1.78 28.1 7.91 4.32N
148 20 0 -42 31 59 9 8 0 29 282 1.79 28.1 7.87 4.28N
148 30 0 -42 32 36 9 8 10 29 282 1.80 28.0 7.82 4.23N
148 40 0 -42 33 13 9 8 21 29 282 1.81 28.0 7.78 4.19N
148 50 0 -42 33 48 9 8 31 29 282 1.82 27.9 7.73 4.14N
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 0.81km North, and 0.6 secs. later cf. primary.
Graze Path of component #4 270.14km South, and 25.9 secs. later cf. primary.
1925 = alf Vir, 0.95 +/- 0.10 V , Type ELL+BCEP, Period 4.014604 days, Phase 0.25
Librations Long -4.74 Lat +3.01
P +7.5 D -3.4
Illumination of moon 17%+
Elongation of Moon 49
Vertical Profile Scale 1.92 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.58 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
0.1 4.6 6.0 6.8 7.3 7.6 7.8 8.0
2.1 5.2 6.7 7.5 8.0 8.3 8.6 8.8
4.1 6.1 7.6 8.4 8.9 9.3 9.6 9.8
6.1 6.1 7.6 8.4 9.0 9.4 9.7 9.9
8.1 6.2 7.7 8.5 9.1 9.4 9.7 10.0
Lunar Limb Profile for graze near Hobart
