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

------------------------------------------------------------------------------
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

Lunar Limb Profile