Predictions for Grazing Occultation of ZC 2236, 2012 Aug 24
Graze profile
Grazing Occultation of 2236DF3 Magnitude 6.9 [Red = 6.6]
Date: 2012 Aug 24 7h 1m, to 2012 Aug 24 7h 8m
Nominal site altitude 100m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
173 0 0 -39 58 24 7 1 26 66 320 0.45 189.3 174.62 3.82S
173 10 0 -39 58 54 7 1 43 66 320 0.45 189.2 174.57 3.87S
173 20 0 -39 59 23 7 2 0 65 320 0.46 189.2 174.53 3.91S
173 30 0 -39 59 50 7 2 17 65 319 0.46 189.2 174.48 3.96S
173 40 0 -40 0 16 7 2 34 65 319 0.46 189.1 174.44 4.00S
173 50 1 -40 0 42 7 2 52 65 318 0.47 189.1 174.39 4.05S
174 0 1 -40 1 6 7 3 9 65 318 0.47 189.0 174.35 4.09S
174 10 1 -40 1 29 7 3 26 65 317 0.47 189.0 174.30 4.13S
174 20 1 -40 1 51 7 3 43 65 317 0.47 188.9 174.26 4.18S
174 30 1 -40 2 12 7 4 0 65 317 0.48 188.9 174.22 4.22S
174 40 1 -40 2 32 7 4 17 64 316 0.48 188.8 174.17 4.27S
174 50 1 -40 2 50 7 4 34 64 316 0.48 188.8 174.13 4.31S
175 0 1 -40 3 8 7 4 51 64 315 0.48 188.8 174.09 4.35S
175 10 2 -40 3 24 7 5 8 64 315 0.49 188.7 174.04 4.40S
175 20 2 -40 3 40 7 5 25 64 314 0.49 188.7 174.01 4.43S
175 30 2 -40 3 54 7 5 41 64 314 0.49 188.6 173.96 4.47S
175 40 2 -40 4 7 7 5 58 64 314 0.50 188.6 173.92 4.52S
175 50 2 -40 4 19 7 6 15 63 313 0.50 188.6 173.88 4.56S
176 0 2 -40 4 30 7 6 32 63 313 0.50 188.5 173.84 4.60S
176 10 2 -40 4 40 7 6 49 63 312 0.51 188.5 173.79 4.65S
176 20 2 -40 4 49 7 7 5 63 312 0.51 188.4 173.75 4.69S
176 30 3 -40 4 57 7 7 22 63 312 0.51 188.4 173.71 4.73S
176 40 3 -40 5 4 7 7 39 63 311 0.51 188.3 173.67 4.77S
176 50 3 -40 5 10 7 7 55 63 311 0.52 188.3 173.62 4.82S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
2236 is double:
Graze prediction is based on the mean position of AB 7.65 7.67 1.69" 227.8
(BU 122) Graze path of A 1.33 km south, and 1.3 secs later compared to prediction
Graze path of B 1.35 km north, and 1.3 secs earlier compared to prediction
AB 7.65 7.67 1.69" 227.8 (BU 122) Graze path of B 2.68 km north, and 2.6 secs earlier compared to A
Librations Long +0.08 Lat +0.03
P +174.09 D +0.30
Illumination of moon 46%+
Elongation of Moon 86
Vertical Profile Scale 1.97 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.42 deg/min
At longitude 175.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
0.4 5.1 6.5 7.3 7.9 8.2 8.5 8.7
2.4 5.1 6.5 7.4 7.9 8.3 8.5 8.7
4.4 5.9 7.4 8.2 8.8 9.1 9.4 9.7
6.4 5.9 7.4 8.2 8.8 9.2 9.5 9.7
8.4 5.9 7.4 8.2 8.8 9.2 9.5 9.7
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
15399-1946BU 122 1868 2009 67 203 228 2.1 1.9 7.65 7.67 F5V +043-024 +043-024 -19 4177 N D 153954.55-194608.3
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Interferometric catalogue entries
153954.48-194608.7 ADS 9735 BU 122 HD 139628 HIP 76714 15399-1946 N
Date PA Sep M1 M2
1983.4308 222.4 . 1.839 . . . . . 549 22 3.8 1 McA1987b Sch
1988.2582 222.8 . 1.840 . . . . . 549 22 3.8 1 McA1989 Sch
1989.2385 223.3 . 1.821 . . . . . 549 22 3.8 1 McA1990 Sch
1991.25 223.5 . 1.816 . 7.76 . 7.71 . 550 0.3 1 HIP1997a Thp
1991.25 . . . . 7.73 . 7.70 0.01 505 97 0.3 1 Fab2000a Thp
1991.25 . . . . 8.20 . 8.13 0.01 435 70 0.3 1 Fab2000a Thp
1991.61 223.4 . 1.813 . 7.651 0.012 7.669 0.012 530 100 1.4 1 TYC2000a Tty
1991.61 . . . . 8.134 0.017 8.109 0.016 430 90 1.4 1 TYC2000a Tty
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
MidNZ 173.0 -41.0 114km 7 1 25
Wellington 174.8 -41.3 139km 7 4 30
Lunar Limb Profile
