Predictions for Grazing Occultation of ZC 1971, 2013 Mar 1 near Perth
Graze profile
Grazing Occultation of 1971SG8 Magnitude 5.5 [Red = 0.0]
R1971 = 86 Virginis
Date: 2013 Mar 01 15h 14m, to 2013 Mar 01 15h 26m
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
112 0 0 -30 11 35 15 13 34 26 90 2.03 203.6 181.29 1.74S
112 30 0 -30 25 47 15 14 13 27 89 1.98 203.6 181.35 1.80S
113 0 0 -30 40 7 15 14 53 27 89 1.93 203.7 181.41 1.86S
113 30 0 -30 54 37 15 15 34 28 88 1.88 203.7 181.47 1.92S
114 0 0 -31 9 15 15 16 15 29 88 1.84 203.8 181.53 1.98S
114 30 0 -31 24 3 15 16 58 29 87 1.80 203.8 181.59 2.04S
115 0 0 -31 38 59 15 17 41 30 87 1.75 203.9 181.65 2.09S
115 30 0 -31 54 4 15 18 26 30 86 1.72 204.0 181.70 2.15S
116 0 0 -32 9 18 15 19 11 31 86 1.68 204.0 181.76 2.20S
116 30 0 -32 24 39 15 19 57 31 85 1.64 204.1 181.81 2.25S
117 0 0 -32 40 9 15 20 44 32 85 1.60 204.1 181.86 2.31S
117 30 0 -32 55 47 15 21 31 32 84 1.57 204.2 181.91 2.36S
118 0 0 -33 11 32 15 22 20 33 83 1.54 204.2 181.96 2.40S
118 30 0 -33 27 25 15 23 9 34 83 1.50 204.3 182.01 2.45S
119 0 0 -33 43 25 15 23 59 34 82 1.47 204.3 182.05 2.50S
119 30 0 -33 59 32 15 24 50 35 82 1.44 204.3 182.09 2.54S
120 0 0 -34 15 46 15 25 41 35 81 1.42 204.4 182.14 2.58S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
1971 is triple:
Graze prediction is based on the mean position of AB 5.66 8.47 1.12" 307.6
(BU 935) Graze path of A 0.04 km north, and 0.2 secs later compared to prediction
Graze path of B 0.60 km south, and 2.1 secs earlier compared to prediction
AB 5.66 8.47 1.12" 307.6 (BU 935) Graze path of B 0.64 km south, and 2.2 secs earlier compared to A
AC 5.7 11.9 26.8" 165.0 (STF1780) Graze path of C 50.74 km north, and 34.1 secs later compared to A
Librations Long -2.98 Lat +1.68
P +181.65 D +2.03
Illumination of moon 83%-
Elongation of Moon 132
Vertical Profile Scale 2.38 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.77 deg/min
At longitude 116.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-1.8 2.6 3.9 4.7 5.1 5.4 5.5 5.7
0.2 2.6 3.9 4.7 5.1 5.4 5.5 5.7
2.2 2.6 3.9 4.7 5.1 5.4 5.5 5.7
4.2 4.5 5.9 6.6 7.1 7.4 7.6 7.7
6.2 4.5 5.9 6.6 7.1 7.4 7.6 7.7
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
13459-1226BU 935AB 1879 1991 19 298 306 1.6 1.2 5.66 8.47 G8III -021+006 -021+006 -11 3591 N D 134556.33-122535.6
13459-1226STF1780AC 1879 1998 16 165 165 26.9 26.8 5.66 11.9 G8III -021+006 -016+005 N D 134556.33-122535.6
13459-1226STF1780CD 1879 1958 12 274 272 1.7 2.4 11.9 13.1 -016+005 N 134556.84-122601.1
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Interferometric catalogue entries
134556.33-122535.6 ADS 9018 BU 935AB HD 119853 HIP 67172 13459-1226 N
Date PA Sep M1 M2
1991.25 304.8 . 1.132 . 5.734 0.003 8.396 0.031 511 222 0.3 1 HIP1997a Hh
1991.25 . . . . 5.70 . 8.39 0.01 505 97 0.3 1 Fab2000a Hh
1991.25 . . . . 6.78 . 8.97 0.01 435 70 0.3 1 Fab2000a Hh
1991.44 306.1 . 1.187 . 5.661 0.010 8.474 0.019 530 100 1.4 1 TYC2000a Ht
1991.44 . . . . 6.737 0.015 8.939 0.022 430 90 1.4 1 TYC2000a Ht
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Lunar Limb Profile
