Predictions for Grazing Occultation of SAO 186461, 2007 Feb 13

Grazing Occultation of  186461 cA2      Magnitude   7.4v
Date   2007 February 13    (Tuesday)     Nominal site altitude  0m

E. Longit.   Latitude     U.T.    Sun  Moon   TanZ   PA    WA      CA
   o  '  "    o  '  "   h  m  s   Alt Alt Az          o     o      o
 172  0  0  -40 25 13  15 41 23       23 108  2.35 186.8 187.91  11.72S
 172 10  0  -40 31  4  15 41 32       23 108  2.33 186.8 187.90  11.71S
 172 20  0  -40 36 54  15 41 41       23 108  2.31 186.8 187.89  11.70S
 172 30  0  -40 42 43  15 41 49       24 108  2.29 186.8 187.88  11.69S
 172 40  0  -40 48 32  15 41 58       24 108  2.27 186.8 187.87  11.68S
 172 50  0  -40 54 21  15 42  7       24 107  2.25 186.7 187.86  11.67S
 173  0  0  -41  0  9  15 42 16       24 107  2.24 186.7 187.85  11.66S
 173 10  0  -41  5 56  15 42 25       24 107  2.22 186.7 187.84  11.65S
 173 20  0  -41 11 43  15 42 34       24 107  2.20 186.7 187.82  11.64S
 173 30  0  -41 17 29  15 42 43       25 107  2.18 186.7 187.81  11.62S
 173 40  0  -41 23 15  15 42 53       25 107  2.16 186.7 187.80  11.61S
 173 50  0  -41 29  0  15 43  2       25 107  2.15 186.7 187.79  11.60S
 174  0  0  -41 34 45  15 43 11       25 106  2.13 186.7 187.78  11.59S
 174 10  0  -41 40 29  15 43 20       25 106  2.11 186.6 187.76  11.58S
 174 20  0  -41 46 12  15 43 30       25 106  2.10 186.6 187.75  11.56S

Path coordinates are referred to WGS84 (as used by GPS).

 186461 is double :   8.2  8.2   0.050"    0.0
Graze Path of component #2  0.11km South, and 0.0 secs. earlier cf. primary.

 186461 = V4385 Sgr,   7.42 to  7.46 Hp,  Type ELL:

                Librations  Long -6.04   Lat +6.05
                            P +187.1     D +7.1
      Illumination of moon  19%-
        Elongation of Moon  52
    Vertical Profile Scale  2.14 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.91 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
     7.6      6.0   7.5   8.3   8.8   9.2   9.5   9.7
     9.6      6.1   7.5   8.4   8.9   9.3   9.6   9.8
    11.6      6.1   7.6   8.4   9.0   9.3   9.6   9.9
    13.6      6.2   7.7   8.5   9.0   9.4   9.7   9.9
    15.6      6.2   7.7   8.5   9.1   9.5   9.7  10.0

Lunar Limb Profile

Lunar Limb Profile