Predictions for Grazing Occultation of ZC2690, 2016 Oct 8
Graze profile
Grazing Occultation of 2690 B0 Magnitude 6.8 [Red = 6.6] v
Date: 2016 Oct 08 13h 44m, to 2016 Oct 08 14h 2m
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
110 0 0 -37 33 20.0 13 44 5 38 276 1.26 171.5 175.64 4.39S
110 30 0 -37 22 53.4 13 44 48 38 275 1.28 171.5 175.60 4.44S
111 0 0 -37 12 22.5 13 45 31 37 275 1.31 171.5 175.56 4.48S
111 30 0 -37 1 47.4 13 46 14 37 274 1.33 171.4 175.53 4.51S
112 0 0 -36 51 8.4 13 46 56 36 274 1.36 171.4 175.49 4.55S
112 30 0 -36 40 25.4 13 47 37 36 273 1.38 171.4 175.46 4.58S
113 0 0 -36 29 38.8 13 48 19 35 272 1.41 171.3 175.43 4.61S
113 30 0 -36 18 48.6 13 48 59 35 272 1.44 171.3 175.40 4.64S
114 0 0 -36 7 55.0 13 49 39 34 271 1.47 171.3 175.37 4.67S
114 30 0 -35 56 58.2 13 50 19 34 271 1.50 171.2 175.34 4.70S
115 0 0 -35 45 58.3 13 50 57 33 270 1.53 171.2 175.31 4.72S
115 30 0 -35 34 55.4 13 51 36 33 270 1.56 171.2 175.29 4.75S
116 0 0 -35 23 49.7 13 52 14 32 269 1.59 171.2 175.27 4.77S
116 30 0 -35 12 41.4 13 52 51 32 269 1.63 171.1 175.25 4.79S
117 0 0 -35 1 30.7 13 53 28 31 268 1.66 171.1 175.23 4.81S
117 30 0 -34 50 17.6 13 54 4 30 268 1.70 171.1 175.21 4.83S
118 0 0 -34 39 2.4 13 54 39 30 267 1.74 171.1 175.19 4.85S
118 30 0 -34 27 45.2 13 55 14 29 267 1.77 171.1 175.17 4.86S
119 0 0 -34 16 26.1 13 55 49 29 267 1.81 171.1 175.16 4.88S
119 30 0 -34 5 5.3 13 56 23 28 266 1.86 171.0 175.15 4.89S
120 0 0 -33 53 43.0 13 56 56 28 266 1.90 171.0 175.13 4.90S
120 30 0 -33 42 19.2 13 57 28 27 265 1.94 171.0 175.12 4.91S
121 0 0 -33 30 54.1 13 58 1 27 265 1.99 171.0 175.11 4.92S
121 30 0 -33 19 27.9 13 58 32 26 264 2.04 171.0 175.10 4.93S
122 0 0 -33 8 0.7 13 59 3 26 264 2.09 171.0 175.10 4.94S
122 30 0 -32 56 32.7 13 59 33 25 264 2.14 171.0 175.09 4.94S
123 0 0 -32 45 4.0 14 0 2 25 263 2.19 171.0 175.09 4.95S
123 30 0 -32 33 34.7 14 0 31 24 263 2.25 171.0 175.08 4.95S
124 0 0 -32 22 4.9 14 1 0 23 262 2.31 171.0 175.08 4.95S
124 30 0 -32 10 34.9 14 1 27 23 262 2.37 171.0 175.08 4.96S
125 0 0 -31 59 4.6 14 1 54 22 262 2.43 171.0 175.08 4.96S
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.
2690 is variable:
2690 = V4398 Sgr, 6.89 to 6.93, Hp, Type ACYG, Period 2.42048 days, Phase 89 %
C A S S I N I R E G I O N G R A Z E
Librations Long -6.61 Lat -6.46
P +175.92 D -6.73
Illumination of moon 43%+
Elongation of Moon 82
Vertical Profile Scale approx. 2.08 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.65 deg/min
At longitude 117.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
0.8 4.9 6.3 7.0 7.5 7.8 8.1 8.2
2.8 4.9 6.3 7.1 7.5 7.9 8.1 8.2
4.8 5.7 7.1 7.9 8.4 8.7 9.0 9.2
6.8 5.7 7.1 7.9 8.4 8.8 9.0 9.2
8.8 5.7 7.1 7.9 8.4 8.8 9.0 9.2
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Albany 117.8 -35.0 29km 13 54 27.5
Lunar Limb Profile
