Predictions for Grazing Occultation of R 1792, 2013 Aug 11
Graze profile
Grazing Occultation of 1792SF2 Magnitude 7.4 [Red = 7.1] S
Date: 2013 Aug 11 8h 16m, to 2013 Aug 11 8h 18m
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
171 0 0 -42 20 47 8 16 25 21 281 2.64 199.7 175.14 5.43S
171 10 0 -42 21 4 8 16 30 21 281 2.66 199.7 175.12 5.46S
171 20 0 -42 21 21 8 16 35 20 281 2.68 199.6 175.09 5.48S
171 30 0 -42 21 37 8 16 40 20 281 2.70 199.6 175.07 5.51S
171 40 0 -42 21 53 8 16 45 20 280 2.72 199.6 175.04 5.53S
171 50 1 -42 22 8 8 16 50 20 280 2.74 199.6 175.02 5.56S
172 0 1 -42 22 22 8 16 55 20 280 2.76 199.5 174.99 5.59S
172 10 1 -42 22 36 8 16 59 20 280 2.78 199.5 174.97 5.61S
172 20 1 -42 22 49 8 17 4 20 280 2.80 199.5 174.94 5.64S
172 30 1 -42 23 2 8 17 9 20 280 2.82 199.5 174.91 5.66S
172 40 1 -42 23 14 8 17 14 19 280 2.84 199.4 174.89 5.69S
172 50 1 -42 23 25 8 17 18 19 279 2.86 199.4 174.86 5.71S
173 0 1 -42 23 36 8 17 23 19 279 2.89 199.4 174.84 5.74S
173 10 2 -42 23 46 8 17 27 19 279 2.91 199.4 174.81 5.76S
173 20 2 -42 23 55 8 17 32 19 279 2.93 199.3 174.79 5.79S
173 30 2 -42 24 4 8 17 36 19 279 2.95 199.3 174.77 5.81S
173 40 2 -42 24 12 8 17 41 19 279 2.98 199.3 174.74 5.84S
173 50 2 -42 24 20 8 17 45 18 279 3.00 199.3 174.72 5.86S
174 0 2 -42 24 27 8 17 50 18 279 3.02 199.2 174.69 5.88S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
1792 is variable:
1792 = NSV 19406, 7.36, , Type VAR:
1792 is triple:
AB 7.1 13.0 3.2" 277.2 (RST4500) Graze path of B 1.38 km north, and 6.7 secs earlier compared to A
AC 7.1 13.0 19.1" 292.0 (DAM 578) Graze path of C 1.70 km south, and 40.3 secs earlier compared to A
Librations Long -6.64 Lat +3.12
P +174.55 D +2.78
Illumination of moon 18%+
Elongation of Moon 51
Vertical Profile Scale 2.01 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.75 deg/min
At longitude 172.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
1.7 5.0 6.4 7.1 7.6 7.9 8.2 8.3
3.7 5.0 6.4 7.2 7.7 8.0 8.2 8.4
5.7 5.1 6.5 7.3 7.7 8.1 8.3 8.5
7.7 5.9 7.4 8.2 8.7 9.1 9.4 9.6
9.7 6.0 7.5 8.3 8.8 9.2 9.4 9.6
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
12300-0601RST4500AB 1938 2000 3 276 277 3.0 3.2 7.1 13.0 F2 -106-070 -05 3513 123001.99-060123.7
12300-0601DAM 578AC 1999 2000 3 292 292 19.0 18.8 7.1 13. -106-070 -113-055 123001.99-060123.7
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Interferometric catalogue entries
123001.99-060123.7 . RST4500 BD-05 3513 HIP 60987 12300-0601
Date PA Sep M1 M2
1991.25 . . < 0.1 . 7.45 . . . 511 222 0.3 1 HIP1997e Hh
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
NSV 19406 VAR: 7.36
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Chch graze 172.6 -43.5 127km 8 17 13
Lunar Limb Profile
