Predictions for Grazing Occultation of ZC 900, 2009 Dec 3
This occultation occurs in morning twilight with a low Moon.
Grazing Occultation of 900cB1 Magnitude 4.8 [Red = 4.9]
R900 = 139 Tauri
Date: 2009 Dec 03 16h 17m, to 2009 Dec 03 16h 18m
Nominal site altitude 100m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
168 30 0 -44 47 41 16 17 13 -6 12 327 4.61 192.0 193.53 20.57S
168 40 0 -44 54 6 16 17 20 -6 12 327 4.67 192.0 193.53 20.57S
168 50 0 -45 0 32 16 17 27 -6 12 327 4.74 192.0 193.53 20.57S
169 0 0 -45 6 58 16 17 34 -6 12 327 4.81 192.0 193.53 20.57S
169 10 0 -45 13 24 16 17 40 -6 12 327 4.88 192.0 193.53 20.57S
169 20 1 -45 19 51 16 17 47 -5 11 327 4.95 192.0 193.53 20.57S
169 30 1 -45 26 17 16 17 53 -5 11 327 5.03 192.0 193.53 20.56S
169 40 1 -45 32 45 16 18 0 -5 11 326 5.10 192.0 193.53 20.56S
169 50 1 -45 39 12 16 18 6 -5 11 326 5.18 192.0 193.53 20.56S
170 0 1 -45 45 40 16 18 12 -5 11 326 5.26 192.0 193.52 20.56S
170 10 1 -45 52 8 16 18 18 -5 11 326 5.35 192.0 193.52 20.56S
170 20 1 -45 58 36 16 18 24 -4 10 326 5.43 192.0 193.52 20.55S
170 30 1 -46 5 4 16 18 30 -4 10 326 5.52 192.0 193.52 20.55S
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 1 meters
900 is double: AB 5.6 5.6 0.060" 221.0
Librations Long -2.11 Lat -3.39
P +193.65 D -2.54
Illumination of moon 97%-
Elongation of Moon 162
Vertical Profile Scale 3.52 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.65 deg/min
At longitude 169.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
16.6 3.5 4.8 5.3 5.6 5.8 5.9 6.0
18.6 3.5 4.8 5.3 5.7 5.8 5.9 6.0
20.6 3.5 4.8 5.3 5.7 5.8 6.0 6.0
22.6 3.6 4.9 5.5 5.8 5.9 6.1 6.1
24.6 3.8 5.0 5.6 6.0 6.1 6.3 6.3
Lunar Limb Profile
