Predictions for Grazing Occultation of ZC 651, 2013 Feb 18 near Perth
Graze profile
Grazing Occultation of 651cB8 Magnitude 6.0 [Red = 6.0] v
Date: 2013 Feb 18 14h 31m, to 2013 Feb 18 14h 37m
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 -31 0 5 14 31 25 18 309 3.13 3.1 13.84 12.46N
112 30 0 -31 11 39 14 31 51 17 309 3.23 3.1 13.87 12.50N
113 0 0 -31 23 17 14 32 16 17 308 3.34 3.1 13.91 12.53N
113 30 0 -31 34 58 14 32 40 16 308 3.46 3.2 13.94 12.56N
114 0 0 -31 46 43 14 33 4 16 308 3.58 3.2 13.97 12.60N
114 30 0 -31 58 30 14 33 26 15 307 3.71 3.2 14.00 12.62N
115 0 0 -32 10 20 14 33 48 15 307 3.85 3.3 14.03 12.65N
115 30 0 -32 22 12 14 34 9 14 306 3.99 3.3 14.05 12.68N
116 0 0 -32 34 7 14 34 29 14 306 4.15 3.3 14.08 12.70N
116 30 0 -32 46 4 14 34 48 13 306 4.32 3.3 14.10 12.72N
117 0 0 -32 58 3 14 35 7 13 305 4.51 3.3 14.12 12.74N
117 30 0 -33 10 4 14 35 24 12 305 4.70 3.4 14.13 12.76N
118 0 0 -33 22 7 14 35 41 12 305 4.91 3.4 14.15 12.77N
118 30 0 -33 34 11 14 35 57 11 304 5.15 3.4 14.16 12.79N
119 0 0 -33 46 17 14 36 12 10 304 5.40 3.4 14.18 12.80N
119 30 0 -33 58 24 14 36 27 10 304 5.67 3.4 14.19 12.81N
120 0 0 -34 10 32 14 36 40 10 303 5.98 3.4 14.20 12.82N
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 3 meters [CHARM/CADARS, 5 measures]
651 is variable:
651 = V1141 Tau, 6. to 6.02, Hp, Type SPB, Period 0.62039 days, Phase 69 %
651 is double:
AB 6.0 0.20" 143.9 (CHR 16) Graze path of B 0.39 km north, and 0.3 secs later compared to A
Librations Long +0.77 Lat +1.28
P +14.09 D -0.79
Illumination of moon 57%+
Elongation of Moon 98
Vertical Profile Scale 2.66 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.49 deg/min
At longitude 116.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
8.7 4.9 6.3 7.0 7.4 7.6 7.8 7.9
10.7 4.9 6.3 7.0 7.4 7.6 7.8 7.9
12.7 4.9 6.3 7.0 7.4 7.7 7.8 7.9
14.7 5.0 6.3 7.0 7.4 7.7 7.8 8.0
16.7 5.0 6.3 7.0 7.4 7.7 7.9 8.0
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
04235+2059CHR 16 1985 1986 2 9 1 0.2 0.2 5.99 B8IV-V +015-035 +20 751 N 042332.36+205855.7
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Interferometric catalogue entries
042332.36+205855.7 HR 1375 CHR 16 HD 27742 HIP 20493 04235+2059 N
Date PA Sep M1 M2
1977.734 . . < 0.035 . . . . . 552 20 3.8 1 Hrt1984 Sc
1980.721 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc
1985.8514 9.2 . 0.188 . . . . . 549 22 3.8 1 McA1987b Sc
1986.8865 1.0 . 0.233 . . . . . 549 22 3.8 1 McA1989 Sc
1991.25 . . S . . 6.00 . . . 511 222 0.3 1 HIP1997h Hh
2002.8841 . . < 0.12 . . . . . 900 340 3.6 1 Rbr2005 A
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
V1141 Tau SPB 6. 6.02 Hp2448500.5060 0.62039
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Albany 117.8 -35.0 169km 14 35 35
Perth 115.9 -32.0 56km 14 34 23
Lunar Limb Profile
