Predictions for Grazing Occultation of ZC2280, 2015 Jul 26
Graze profile
Grazing Occultation of 2280wM1 Magnitude 6.5 [Red = 5.6] s
Date: 2015 Jul 26 14h 39m, to 2015 Jul 26 15h 2m
Nominal site altitude 50m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
110 0 0 -33 46 58 14 39 25 54 291 0.71 188.1 175.59 5.91S
110 30 0 -33 45 54 14 40 17 54 290 0.73 188.0 175.47 6.03S
111 0 0 -33 44 42 14 41 8 53 290 0.74 187.9 175.34 6.16S
111 30 0 -33 43 20 14 41 59 53 289 0.76 187.8 175.22 6.28S
112 0 0 -33 41 50 14 42 49 52 288 0.77 187.6 175.10 6.40S
112 30 0 -33 40 12 14 43 39 52 288 0.79 187.5 174.98 6.52S
113 0 0 -33 38 25 14 44 29 51 287 0.81 187.4 174.86 6.64S
113 30 0 -33 36 29 14 45 18 51 286 0.82 187.3 174.75 6.75S
114 0 0 -33 34 25 14 46 6 50 286 0.84 187.2 174.63 6.87S
114 30 0 -33 32 13 14 46 54 49 285 0.85 187.1 174.52 6.98S
115 0 0 -33 29 53 14 47 42 49 284 0.87 186.9 174.41 7.09S
115 30 0 -33 27 25 14 48 29 48 284 0.89 186.8 174.30 7.20S
116 0 0 -33 24 49 14 49 15 48 283 0.91 186.7 174.19 7.31S
116 30 0 -33 22 5 14 50 1 47 283 0.92 186.6 174.08 7.42S
117 0 0 -33 19 13 14 50 47 47 282 0.94 186.5 173.97 7.52S
117 30 0 -33 16 13 14 51 32 46 282 0.96 186.4 173.87 7.63S
118 0 0 -33 13 6 14 52 16 46 281 0.98 186.3 173.77 7.73S
118 30 0 -33 9 51 14 53 0 45 281 1.00 186.2 173.66 7.83S
119 0 0 -33 6 29 14 53 44 45 280 1.02 186.1 173.56 7.93S
119 30 0 -33 2 59 14 54 27 44 280 1.04 186.0 173.47 8.03S
120 0 0 -32 59 22 14 55 9 43 279 1.06 185.9 173.37 8.13S
120 30 0 -32 55 38 14 55 51 43 279 1.08 185.8 173.27 8.22S
121 0 0 -32 51 47 14 56 33 42 278 1.10 185.7 173.18 8.32S
121 30 0 -32 47 49 14 57 14 42 278 1.12 185.6 173.09 8.41S
122 0 0 -32 43 44 14 57 54 41 277 1.14 185.5 173.00 8.50S
122 30 0 -32 39 32 14 58 34 41 277 1.16 185.4 172.91 8.59S
123 0 0 -32 35 13 14 59 14 40 276 1.19 185.4 172.82 8.68S
123 30 0 -32 30 48 14 59 53 40 276 1.21 185.3 172.73 8.77S
124 0 0 -32 26 16 15 0 31 39 275 1.23 185.2 172.64 8.85S
124 30 0 -32 21 37 15 1 9 38 275 1.26 185.1 172.56 8.94S
125 0 0 -32 16 52 15 1 46 38 274 1.28 185.0 172.48 9.02S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level. The path
is adjusted for the effects of refraction at low moon altitudes.
Projected diameter of star 6 meters [Estimated]
2280 is variable:
2280 = NSV 7351, 6.59, range 0.05, V
2280 is double:
AB 6.6 13.7 36" 238.3 (HJ 1281) Graze path of B 42.57 km north, and 74.8 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 -7.08 Lat -5.85
P +174.57 D -6.31
Illumination of moon 73%+
Elongation of Moon 117
Vertical Profile Scale 1.93 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.43 deg/min
At longitude 117.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
3.6 4.7 6.2 7.0 7.5 7.8 8.0 8.2
5.6 4.8 6.2 7.0 7.5 7.9 8.1 8.3
7.6 5.6 7.1 7.8 8.4 8.7 9.0 9.1
9.6 5.6 7.1 7.9 8.4 8.7 9.0 9.2
11.6 5.6 7.1 7.9 8.4 8.7 9.0 9.2
NSV 7351 6.59 ( 0.05 V
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
David Breadsell, Warra, Qld 151.0 -27.0 73km 15 22 7
Lunar Limb Profile
