Predictions for Grazing Occultation of ZC 1971, 2013 Jul 16, near Perth
Graze profile
Grazing Occultation of 1971SG8 Magnitude 5.5 [Red = 0.0]
R1971 = 86 Virginis
Date: 2013 Jul 16 14h 22m, to 2013 Jul 16 14h 29m
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 58 32 14 21 42 36 277 1.38 195.5 173.18 5.21S
112 30 0 -30 57 57 14 22 14 35 277 1.41 195.4 173.07 5.32S
113 0 0 -30 57 15 14 22 45 35 276 1.43 195.3 172.97 5.42S
113 30 0 -30 56 25 14 23 15 34 276 1.46 195.2 172.86 5.52S
114 0 0 -30 55 28 14 23 45 34 276 1.49 195.1 172.76 5.63S
114 30 0 -30 54 23 14 24 15 33 275 1.52 195.0 172.66 5.73S
115 0 0 -30 53 11 14 24 44 33 275 1.55 194.9 172.56 5.83S
115 30 0 -30 51 52 14 25 12 32 274 1.59 194.8 172.46 5.93S
116 0 0 -30 50 26 14 25 40 32 274 1.62 194.7 172.36 6.03S
116 30 0 -30 48 53 14 26 7 31 274 1.65 194.6 172.27 6.12S
117 0 0 -30 47 13 14 26 34 31 273 1.69 194.5 172.17 6.22S
117 30 0 -30 45 26 14 27 1 30 273 1.72 194.4 172.08 6.31S
118 0 0 -30 43 32 14 27 27 30 273 1.76 194.3 171.98 6.40S
118 30 0 -30 41 32 14 27 52 29 272 1.80 194.2 171.89 6.50S
119 0 0 -30 39 24 14 28 17 29 272 1.84 194.1 171.80 6.59S
119 30 0 -30 37 11 14 28 41 28 272 1.88 194.0 171.71 6.68S
120 0 0 -30 34 51 14 29 5 28 271 1.92 193.9 171.63 6.76S
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 0.06 km north, and 0.2 secs later compared to prediction
Graze path of B 0.78 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 0.84 km south, and 2.3 secs earlier compared to A
AC 5.7 11.9 26.8" 165.0 (STF1780) Graze path of C 44.92 km north, and 29.5 secs later compared to A
Librations Long -7.70 Lat +1.49
P +172.20 D +0.72
Illumination of moon 54%+
Elongation of Moon 95
Vertical Profile Scale 1.90 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.63 deg/min
At longitude 116.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
2.0 4.8 6.2 7.0 7.4 7.7 8.0 8.1
4.0 5.6 7.0 7.8 8.3 8.6 8.8 9.0
6.0 5.6 7.0 7.8 8.3 8.6 8.9 9.0
8.0 5.6 7.0 7.8 8.3 8.7 8.9 9.1
10.0 5.6 7.1 7.8 8.3 8.7 8.9 9.1
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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
Perth 115.9 -32.0 122km 14 25 32
Lunar Limb Profile
