Predictions for Grazing Occultation of SAO128449 Apr 16

Graze profile
Grazing Occultation of  128449 M*      Magnitude 7.6 [Red = 6.8]  s
Date: 2015 Apr 16 17h 58m,  to  2015 Apr 16 18h  1m

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
 167  0  0  -43  0 27  17 57 43        9  81  6.67 160.3 185.21   0.93S
 167 30  0  -42 58 25  17 57 48        9  81  6.38 160.2 185.15   0.88S
 168  0  0  -42 56 18  17 57 53        9  80  6.11 160.1 185.09   0.82S
 168 30  0  -42 54  6  17 57 59       10  80  5.86 160.1 185.03   0.76S
 169  0  0  -42 51 49  17 58  4       10  80  5.63 160.0 184.97   0.70S
 169 30  0  -42 49 27  17 58 10       10  79  5.42 160.0 184.91   0.64S
 170  0  0  -42 47  1  17 58 17       11  79  5.22 159.9 184.85   0.58S
 170 30  0  -42 44 30  17 58 24       11  79  5.04 159.8 184.79   0.52S
 171  0  0  -42 41 54  17 58 31       12  78  4.86 159.8 184.73   0.46S
 171 30  0  -42 39 13  17 58 38       12  78  4.70 159.7 184.67   0.40S
 172  0  0  -42 36 26  17 58 46       12  77  4.55 159.7 184.61   0.34S
 172 30  0  -42 33 35  17 58 54       13  77  4.40 159.6 184.55   0.27S
 173  0  0  -42 30 39  17 59  2       13  77  4.27 159.5 184.48   0.21S
 173 30  0  -42 27 38  17 59 11  -12  14  76  4.14 159.5 184.42   0.15S
 174  0  0  -42 24 32  17 59 20  -11  14  76  4.01 159.4 184.36   0.08S
 174 30  0  -42 21 20  17 59 29  -11  14  76  3.90 159.3 184.29   0.02S
 175  0  0  -42 18  3  17 59 38  -11  15  75  3.79 159.3 184.23  -0.04S
 175 30  0  -42 14 42  17 59 48  -10  15  75  3.68 159.2 184.16  -0.11S
 176  0  0  -42 11 14  17 59 59  -10  16  74  3.58 159.2 184.10  -0.18S
 176 30  0  -42  7 42  18  0  9   -9  16  74  3.49 159.1 184.03  -0.24S
 177  0  0  -42  4  4  18  0 20   -9  16  74  3.40 159.0 183.96  -0.31S
 177 30  0  -42  0 20  18  0 32   -8  17  73  3.31 159.0 183.90  -0.38S
 178  0  0  -41 56 31  18  0 44   -8  17  73  3.22 158.9 183.83  -0.44S
 178 30  0  -41 52 36  18  0 56   -8  18  73  3.14 158.8 183.76  -0.51S
 179  0  0  -41 48 36  18  1  8   -7  18  72  3.07 158.7 183.69  -0.58S

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  3 meters  [Estimated]

128449 is variable: 
    128449 = NSV 26159, 7.58 to 7.67, Hp


    C A S S I N I   R E G I O N   G R A Z E
                Librations  Long +0.50   Lat -1.71
                            P +184.47     D -1.48
      Illumination of moon  6%-
        Elongation of Moon  27
    Vertical Profile Scale  2.06 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.95 deg/min


At longitude 173.00:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
    -3.8      6.4   7.8   8.5   9.0   9.3   9.6   9.7
    -1.8      7.1   8.5   9.3   9.8  10.2  10.4  10.6
     0.2      7.2   8.7   9.5  10.0  10.4  10.7  10.9
     2.2      7.3   8.7   9.5  10.1  10.4  10.7  10.9
     4.2      7.3   8.8   9.6  10.1  10.5  10.8  11.0

------------------------------------------------------------------------------
Results of Observer Scan                                    UT
Site                              Long.   Lat.   Dist.    h  m  s
Chch graze                        172.6  -43.5   108km   17 58 56
MidNZ                             173.0  -41.0   166km   17 59  2
Wellington                        174.8  -41.3   112km   17 59 35

 

Lunar Limb Profile

Lunar Limb Profile