Predictions for Grazing Occultation of ZC 947, 2015 Oct 31
Graze profile
Grazing Occultation of 947SF6 Magnitude 5.2 [Red = 5.0]
R947 = 71 Orionis
Date: 2015 Oct 31 14h 38m, to 2015 Oct 31 14h 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
135 0 0 -36 57 30 14 38 22 11 56 5.33 354.5 352.80 10.10N
135 30 0 -36 46 11 14 38 36 11 56 5.10 354.5 352.80 10.10N
136 0 0 -36 34 52 14 38 50 12 55 4.88 354.5 352.80 10.10N
136 30 0 -36 23 33 14 39 6 12 55 4.68 354.5 352.80 10.10N
137 0 0 -36 12 15 14 39 22 13 55 4.49 354.5 352.81 10.10N
137 30 0 -36 0 57 14 39 38 13 54 4.32 354.5 352.81 10.09N
138 0 0 -35 49 40 14 39 56 14 54 4.16 354.5 352.82 10.08N
138 30 0 -35 38 24 14 40 14 14 54 4.01 354.5 352.82 10.08N
139 0 0 -35 27 8 14 40 33 14 53 3.87 354.6 352.83 10.07N
139 30 0 -35 15 53 14 40 52 15 53 3.74 354.6 352.84 10.06N
140 0 0 -35 4 41 14 41 13 15 53 3.61 354.6 352.85 10.05N
140 30 0 -34 53 29 14 41 34 16 52 3.49 354.6 352.87 10.03N
141 0 0 -34 42 18 14 41 56 16 52 3.38 354.6 352.88 10.02N
141 30 0 -34 31 9 14 42 18 17 51 3.28 354.6 352.90 10.00N
142 0 0 -34 20 1 14 42 41 17 51 3.18 354.6 352.91 9.99N
142 30 0 -34 8 55 14 43 6 18 51 3.08 354.7 352.93 9.97N
143 0 0 -33 57 52 14 43 30 18 50 2.99 354.7 352.95 9.95N
143 30 0 -33 46 50 14 43 56 19 50 2.91 354.7 352.98 9.93N
144 0 0 -33 35 51 14 44 23 19 49 2.83 354.7 353.00 9.90N
144 30 0 -33 24 55 14 44 50 20 49 2.75 354.7 353.03 9.88N
145 0 0 -33 14 1 14 45 18 21 49 2.67 354.8 353.05 9.85N
145 30 0 -33 3 10 14 45 47 21 48 2.60 354.8 353.08 9.82N
146 0 0 -32 52 22 14 46 17 22 48 2.54 354.8 353.12 9.79N
146 30 0 -32 41 37 14 46 48 22 47 2.47 354.9 353.15 9.75N
147 0 0 -32 30 56 14 47 19 23 47 2.41 354.9 353.19 9.72N
147 30 0 -32 20 19 14 47 52 23 46 2.35 354.9 353.22 9.68N
148 0 0 -32 9 45 14 48 25 24 46 2.29 355.0 353.26 9.64N
148 30 0 -31 59 15 14 48 59 24 46 2.24 355.0 353.31 9.60N
149 0 0 -31 48 50 14 49 34 25 45 2.18 355.1 353.35 9.55N
149 30 0 -31 38 29 14 50 10 25 45 2.13 355.1 353.40 9.51N
150 0 0 -31 28 13 14 50 47 26 44 2.08 355.2 353.45 9.46N
150 30 0 -31 18 2 14 51 24 26 44 2.04 355.2 353.50 9.40N
151 0 0 -31 7 56 14 52 3 27 43 1.99 355.3 353.55 9.35N
151 30 0 -30 57 56 14 52 42 27 43 1.95 355.3 353.61 9.29N
152 0 0 -30 48 2 14 53 22 28 42 1.91 355.4 353.67 9.23N
152 30 0 -30 38 13 14 54 4 28 42 1.87 355.4 353.73 9.17N
153 0 0 -30 28 31 14 54 46 29 41 1.83 355.5 353.80 9.11N
153 30 0 -30 18 55 14 55 29 29 41 1.79 355.6 353.86 9.04N
154 0 0 -30 9 26 14 56 13 30 40 1.75 355.7 353.93 8.97N
154 30 0 -30 0 4 14 56 57 30 40 1.72 355.7 354.01 8.90N
155 0 0 -29 50 50 14 57 43 31 39 1.68 355.8 354.08 8.82N
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]
947 is quadruple:
AB 5.2 11.2 7.1" 185.4 (HJ 2302) Graze path of B 18.76 km north, and 3.1 secs earlier compared to A
AC 5.2 12.5 65" 283.7 (HJ 2302) Graze path of C 56.79 km south, and 144.8 secs earlier compared to A
AD 5.2 12.0 70" 265.5 (HJ 2302) Graze path of D 2.41 km south, and 166.0 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 +8.03 Lat +6.03
P +353.89 D -6.69
Illumination of moon 78%-
Elongation of Moon 124
Vertical Profile Scale 2.65 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.54 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
5.8 4.3 5.7 6.4 6.8 7.0 7.2 7.3
7.8 5.0 6.4 7.1 7.5 7.8 8.0 8.1
9.8 5.1 6.5 7.2 7.6 7.9 8.1 8.2
11.8 5.1 6.5 7.2 7.6 7.9 8.1 8.2
13.8 5.1 6.5 7.2 7.7 7.9 8.1 8.2
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
AU Mid 143.0 -30.6 344km 14 43 31
Newcastle 151.7 -33.0 213km 14 52 59
Pt Macquarie 152.8 -31.4 91km 14 54 32
Sydney 151.1 -33.8 281km 14 52 8
Lunar Limb Profile
