Predictions for Grazing Occultation of ZC 2672, 2009 Apr 15
Grazing Occultation of 2672wK1 Magnitude 2.8 [Red = 2.3]
R2672 = Kaus Borealis = lambda Sagittarii
Date: 2009 Apr 15 17h 34m, to 2009 Apr 15 18h 35m
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
146 0 0 -30 55 55 18 7 32 76 72 0.26 352.4 353.86 5.63N
146 30 0 -30 55 20 18 9 6 76 71 0.24 352.1 353.59 5.90N
147 0 0 -30 54 27 18 10 41 77 69 0.23 351.8 353.32 6.18N
147 30 0 -30 53 16 18 12 17 78 67 0.22 351.5 353.04 6.45N
148 0 0 -30 51 46 18 13 53 78 66 0.20 351.3 352.76 6.73N
148 30 0 -30 49 58 18 15 30 79 64 0.19 351.0 352.48 7.01N
149 0 0 -30 47 51 18 17 7 80 61 0.18 350.7 352.20 7.30N
149 30 0 -30 45 25 18 18 45 81 59 0.17 350.4 351.91 7.58N
150 0 0 -30 42 41 18 20 23 81 56 0.15 350.1 351.63 7.86N
150 30 0 -30 39 37 18 22 2 82 53 0.14 349.8 351.35 8.15N
151 0 0 -30 36 14 18 23 41 83 49 0.13 349.6 351.06 8.43N
151 30 0 -30 32 32 18 25 21 83 44 0.12 349.3 350.78 8.72N
152 0 0 -30 28 30 18 27 1 84 39 0.11 349.0 350.49 9.00N
152 30 0 -30 24 10 18 28 41 84 33 0.10 348.7 350.21 9.29N
153 0 0 -30 19 29 18 30 21 85 26 0.09 348.4 349.92 9.57N
153 30 0 -30 14 29 18 32 2 85 17 0.09 348.1 349.64 9.85N
154 0 0 -30 9 9 18 33 43 85 7 0.08 347.8 349.36 10.14N
154 30 0 -30 3 29 18 35 25 86 357 0.08 347.6 349.07 10.42N
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 8 meters
2672 is double:
AB 2.8 9.8 85" 185.5 Graze path of B 147.37 km north, and 60.7 secs earlier compared to A
C A S S I N I R E G I O N G R A Z E
Librations Long +0.56 Lat +3.13
P +354.70 D -2.90
Illumination of moon 67%-
Elongation of Moon 109
Vertical Profile Scale 1.87 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.16 deg/min
At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
0.8 2.9 4.4 5.2 5.7 6.0 6.2 6.4
2.8 4.9 6.4 7.2 7.7 8.1 8.3 8.5
4.8 5.0 6.4 7.2 7.7 8.1 8.4 8.6
6.8 5.8 7.2 8.1 8.6 9.0 9.3 9.5
8.8 5.8 7.3 8.1 8.6 9.0 9.3 9.5
Lunar Limb Profile - Northern NSW
