Predictions for Grazing Occultation of ZC1850, 2015 Jun 25
Graze profile
Grazing Occultation of 1850cK0 Magnitude 6.5 [Red = 5.9]
Date: 2015 Jun 25 10h 11m, to 2015 Jun 25 10h 58m
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 -27 9 19 10 11 14 -4 62 40 0.54 29.9 5.64 6.94N
110 30 0 -27 27 31 10 12 52 -5 62 38 0.53 29.9 5.64 6.94N
111 0 0 -27 45 42 10 14 30 -6 62 36 0.53 29.9 5.64 6.93N
111 30 0 -28 3 50 10 16 8 -7 62 34 0.52 29.9 5.62 6.92N
112 0 0 -28 21 55 10 17 46 -7 63 32 0.52 29.9 5.61 6.90N
112 30 0 -28 39 55 10 19 25 -8 63 29 0.51 29.9 5.58 6.88N
113 0 0 -28 57 51 10 21 3 -9 63 27 0.51 29.8 5.56 6.85N
113 30 0 -29 15 42 10 22 41 -10 63 25 0.51 29.8 5.52 6.82N
114 0 0 -29 33 26 10 24 19 -11 63 23 0.51 29.8 5.49 6.78N
114 30 0 -29 51 5 10 25 57 -12 63 21 0.51 29.7 5.44 6.74N
115 0 0 -30 8 36 10 27 34 63 19 0.51 29.7 5.39 6.69N
115 30 0 -30 26 0 10 29 12 63 17 0.51 29.6 5.34 6.64N
116 0 0 -30 43 16 10 30 48 63 15 0.51 29.5 5.28 6.58N
116 30 0 -31 0 23 10 32 25 63 13 0.51 29.5 5.22 6.51N
117 0 0 -31 17 22 10 34 1 63 11 0.51 29.4 5.15 6.45N
117 30 0 -31 34 11 10 35 36 63 9 0.52 29.3 5.08 6.38N
118 0 0 -31 50 50 10 37 11 62 7 0.52 29.3 5.00 6.30N
118 30 0 -32 7 20 10 38 45 62 5 0.53 29.2 4.93 6.22N
119 0 0 -32 23 39 10 40 19 62 3 0.53 29.1 4.84 6.14N
119 30 0 -32 39 47 10 41 52 62 1 0.54 29.0 4.75 6.05N
120 0 0 -32 55 45 10 43 24 62 359 0.54 28.9 4.66 5.96N
120 30 0 -33 11 31 10 44 55 61 357 0.55 28.8 4.57 5.86N
121 0 0 -33 27 5 10 46 26 61 355 0.56 28.7 4.47 5.77N
121 30 0 -33 42 28 10 47 55 61 354 0.56 28.6 4.37 5.67N
122 0 0 -33 57 39 10 49 24 60 352 0.57 28.5 4.27 5.56N
122 30 0 -34 12 38 10 50 52 60 350 0.58 28.4 4.16 5.46N
123 0 0 -34 27 25 10 52 19 60 349 0.59 28.3 4.06 5.35N
123 30 0 -34 42 0 10 53 46 59 347 0.60 28.2 3.95 5.24N
124 0 0 -34 56 22 10 55 11 59 346 0.61 28.1 3.83 5.13N
124 30 0 -35 10 32 10 56 35 58 344 0.62 28.0 3.72 5.01N
125 0 0 -35 24 29 10 57 58 58 343 0.63 27.9 3.60 4.90N
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 2 meters [Estimated]
1850 is double:
AB 6.4 0.007" 39.9 (HR 4896) Graze path of B 0.01 km south, and 0.0 secs later compared to A
Librations Long -2.76 Lat -1.38
P +5.15 D +1.39
Illumination of moon 59%+
Elongation of Moon 101
Vertical Profile Scale 2.08 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.20 deg/min
At longitude 117.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
2.4 5.0 6.4 7.2 7.7 8.1 8.4 8.6
4.4 5.5 6.9 7.7 8.3 8.6 8.9 9.1
6.4 5.8 7.3 8.1 8.6 9.0 9.3 9.5
8.4 5.8 7.3 8.1 8.6 9.0 9.3 9.5
10.4 5.8 7.3 8.1 8.7 9.0 9.3 9.5
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Greg Bolt, Craigie, W Aus 115.8 -31.8 111km 10 30 2
Jacqeline Milner 116.1 -31.9 105km 10 31 7
Lunar Limb Profile
