Predictions for Grazing Occultation of ZC 2856, 2013 Apr 3, near Port Augusta
Graze profile
Grazing Occultation of 2856c* Magnitude 7.1 [Red = 5.5] V
R2856 = AQ Sagittarii
Date: 2013 Apr 03 19h 41m, to 2013 Apr 03 19h 53m
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
137 0 0 -32 34 40 19 41 14 59 66 0.60 347.4 355.97 4.10N
137 30 0 -32 33 5 19 42 20 60 65 0.58 347.2 355.83 4.24N
138 0 0 -32 31 19 19 43 26 60 64 0.57 347.1 355.68 4.39N
138 30 0 -32 29 23 19 44 32 61 63 0.56 346.9 355.52 4.55N
139 0 0 -32 27 15 19 45 39 62 62 0.54 346.8 355.37 4.70N
139 30 0 -32 24 55 19 46 47 62 61 0.53 346.6 355.21 4.86N
140 0 0 -32 22 25 19 47 56 63 60 0.52 346.5 355.06 5.01N
140 30 0 -32 19 42 19 49 5 63 59 0.50 346.3 354.90 5.17N
141 0 0 -32 16 48 19 50 15 64 58 0.49 346.1 354.74 5.33N
141 30 0 -32 13 43 19 51 26 65 57 0.48 346.0 354.58 5.49N
142 0 0 -32 10 25 19 52 37 -12 65 56 0.46 345.8 354.42 5.65N
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
Projected diameter of star 11 meters [CHARM/CADARS, 2 measures]
2856 is variable:
2856 = AQ Sgr, 9.1 to 11.4, pg, Type SRB, Period 199.6 days
2856 is double:
This next pair is not confirmed
** 6.8 8.5 0.20" 347.0** (OCc1579) Graze path of ? 0.40 km south, and 0.0 secs later compared to the primary
Librations Long +3.28 Lat -6.34
P +354.81 D +6.31
Illumination of moon 42%-
Elongation of Moon 81
Vertical Profile Scale 1.91 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.37 deg/min
At longitude 139.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
0.9 5.1 6.6 7.4 7.9 8.3 8.6 8.8
2.9 5.1 6.6 7.4 7.9 8.3 8.6 8.8
4.9 5.9 7.4 8.2 8.8 9.2 9.5 9.7
6.9 6.0 7.4 8.3 8.8 9.2 9.5 9.7
8.9 6.0 7.4 8.3 8.8 9.2 9.5 9.7
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Double star catalogue details
Interferometric catalogue entries
193418.99-162227.0 BD-16 5360 . HD 184283 HIP 96255 19343-1622
Date PA Sep M1 M2
1991.25 . . S . . 7.05 . . . 511 222 0.3 1 HIP1997h Hh
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
AQ Sgr SRB 9.1 11.4 pg 199.6
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Adelaide 138.6 -34.9 269km 19 44 46
Lunar Limb Profile
