Lunar Limb Profile for graze north of Brisbane
This a southern limit graze, despite the Cusp Angle being N. Also at a lit limb
Grazing Occultation of 1925 SB1 Magnitude 1.0v
1925 = Spica = alpha Virginis
Date 2006 April 13 (Thursday) 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
150 0 0 -26 18 37 19 2 25 17 266 3.21 205.1 184.97 -79.35N
150 10 0 -26 17 59 19 2 29 17 266 3.24 205.0 184.93 -79.40N
150 20 0 -26 17 21 19 2 33 17 266 3.27 205.0 184.88 -79.45N
150 30 0 -26 16 41 19 2 37 17 266 3.31 204.9 184.84 -79.50N
150 40 0 -26 16 1 19 2 41 17 265 3.34 204.9 184.80 -79.54N
150 50 0 -26 15 20 19 2 45 16 265 3.38 204.9 184.77 -79.59N
151 0 0 -26 14 38 19 2 50 16 265 3.41 204.8 184.73 -79.63N
151 10 0 -26 13 55 19 2 54 16 265 3.45 204.8 184.69 -79.67N
151 20 0 -26 13 11 19 2 57 16 265 3.49 204.8 184.66 -79.72N
151 30 0 -26 12 26 19 3 1 16 265 3.52 204.7 184.61 -79.77N
151 40 0 -26 11 41 19 3 5 16 265 3.56 204.7 184.57 -79.82N
151 50 0 -26 10 54 19 3 9 16 265 3.60 204.6 184.53 -79.86N
152 0 0 -26 10 7 19 3 13 15 265 3.64 204.6 184.49 -79.91N
152 10 0 -26 9 18 19 3 16 15 265 3.69 204.6 184.45 -79.95N
152 20 0 -26 8 29 19 3 20 15 265 3.73 204.5 184.41 -80.00N
152 30 0 -26 7 39 19 3 24 15 265 3.77 204.5 184.37 -80.04N
152 40 0 -26 6 48 19 3 27 15 265 3.81 204.4 184.34 -80.09N
152 50 0 -26 5 56 19 3 31 15 264 3.86 204.4 184.30 -80.13N
153 0 0 -26 5 4 19 3 34 14 264 3.91 204.4 184.26 -80.18N
153 10 0 -26 4 10 19 3 37 14 264 3.95 204.3 184.22 -80.22N
153 20 0 -26 3 16 19 3 41 14 264 4.00 204.3 184.18 -80.26N
153 30 0 -26 2 21 19 3 44 14 264 4.05 204.3 184.15 -80.31N
153 40 0 -26 1 25 19 3 47 14 264 4.10 204.2 184.11 -80.35N
153 50 0 -26 0 28 19 3 50 14 264 4.15 204.2 184.07 -80.39N
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 0.08km North, and 0.0 secs. earlier cf. primary.
Graze Path of component #3 0.82km North, and 0.4 secs. later cf. primary.
Graze Path of component #4 263.32km South, and 43.7 secs. later cf. primary.
1925 = alf Vir, 0.95 +/- 0.10 V , Type ELL+BCEP, Period 4.014604 days, Phase 0.23
Librations Long -4.97 Lat +2.34
P +183.9 D +2.9
Illumination of moon 100%+
Elongation of Moon 178
Vertical Profile Scale 1.87 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.76 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
-84.4 1.6 2.9 3.5 3.8 4.0 4.1 4.1
-82.4 1.6 2.9 3.5 3.8 4.0 4.1 4.1
-80.4 1.6 2.9 3.5 3.8 4.0 4.1 4.1
-78.4 1.6 2.9 3.5 3.8 4.0 4.1 4.1
-76.4 1.6 2.9 3.5 3.8 4.0 4.1 4.1