Predictions for Grazing Occultation of ZC 2302, 2013 Feb 4, near Bendigo, Vic
Graze profile
Grazing Occultation of 2302SB0 Magnitude 2.6 [Red = 2.7] s
R2302 = Acrab = beta Scorpii
Date: 2013 Feb 04 21h 27m, to 2013 Feb 04 21h 46m
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
140 0 0 -36 18 52 21 26 34 16 73 16 0.30 190.1 177.63 -1.24S
140 30 0 -36 24 0 21 27 34 16 73 13 0.30 189.9 177.49 -1.37S
141 0 0 -36 28 58 21 28 34 17 73 11 0.30 189.8 177.36 -1.51S
141 30 0 -36 33 44 21 29 34 18 73 8 0.30 189.7 177.22 -1.65S
142 0 0 -36 38 20 21 30 34 18 73 6 0.30 189.5 177.08 -1.79S
142 30 0 -36 42 44 21 31 33 19 73 3 0.30 189.4 176.94 -1.93S
143 0 0 -36 46 58 21 32 33 19 73 1 0.30 189.2 176.80 -2.07S
143 30 0 -36 51 0 21 33 32 20 73 358 0.30 189.1 176.66 -2.21S
144 0 0 -36 54 52 21 34 31 21 73 356 0.30 189.0 176.52 -2.35S
144 30 0 -36 58 33 21 35 29 21 73 353 0.31 188.8 176.38 -2.49S
145 0 0 -37 2 3 21 36 28 22 73 351 0.31 188.7 176.24 -2.63S
145 30 0 -37 5 22 21 37 26 22 73 349 0.31 188.5 176.10 -2.77S
146 0 0 -37 8 30 21 38 25 23 72 347 0.32 188.4 175.96 -2.91S
146 30 0 -37 11 28 21 39 23 24 72 344 0.32 188.3 175.82 -3.05S
147 0 0 -37 14 15 21 40 20 24 72 342 0.32 188.1 175.68 -3.19S
147 30 0 -37 16 51 21 41 18 25 72 340 0.33 188.0 175.55 -3.32S
148 0 0 -37 19 16 21 42 15 25 72 338 0.33 187.8 175.41 -3.46S
148 30 0 -37 21 31 21 43 13 26 71 336 0.34 187.7 175.27 -3.60S
149 0 0 -37 23 35 21 44 10 27 71 334 0.34 187.6 175.13 -3.74S
149 30 0 -37 25 29 21 45 6 27 71 332 0.35 187.4 174.99 -3.88S
150 0 0 -37 27 12 21 46 3 28 70 330 0.36 187.3 174.85 -4.02S
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 2 meters [Estimated]
2302 is variable:
2302 = NSV 7424, 2.61 to 2.67, V
2302 is quadruple:
AB 2.6 0.001" 301.0 (bet Sco) Graze path of B 0.00 km south, and 0.0 secs earlier compared to A
AB 2.6 10.6 0.31" 185.6 (BU 947) Graze path of B 0.62 km north, and 0.0 secs later compared to A
AC 2.6 4.5 13.5" 19.7 (H 3 7) Graze path of C 26.77 km south, and 6.7 secs later compared to A
C A S S I N I R E G I O N G R A Z E
Librations Long -2.97 Lat -1.58
P +176.32 D -1.52
Illumination of moon 35%-
Elongation of Moon 73
Vertical Profile Scale 1.95 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.37 deg/min
At longitude 145.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-6.6 2.1 3.5 4.3 4.8 5.1 5.4 5.6
-4.6 2.1 3.5 4.3 4.8 5.1 5.4 5.6
-2.6 2.1 3.5 4.3 4.8 5.1 5.4 5.6
-0.6 2.1 3.5 4.3 4.8 5.1 5.4 5.6
1.4 2.9 4.3 5.1 5.6 5.9 6.2 6.4
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
16054-1948BU 947AB 1879 2000 41 89 171 0.8 0.3 2.62 10.6 B0.5V -007-025 -19 4307 NOD 160526.23-194819.4
16054-1948H 3 7AC 1777 2010 128 40 20 15.0 13.5 2.59 4.52 B0.5V B2V -007-025 -035-007 -19 4308 N D 160526.23-194819.4
16054-1948MCA 42CE 1971 2009 21 308 313 0.1 0.1 4.52 6.6 B2V -035-007 NOD 160526.55-194806.6
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Interferometric catalogue entries
160526.23-194819.4 bet Sco BU 947A HD 144217 HIP 78820 16054-1948 N O
Date PA Sep M1 M2
1976.5180 V331.7 . 0.0006 0.0015 . . 1.2 . 393 25 1 Evn1977 O
1976.5180 V331.7 . 0.0006 0.0034 . . . . 467 16 1 Evn1977 O
160526.23-194819.4 ADS 9913 BU 947AB HD 144217 HIP 78820 16054-1948 N O
Date PA Sep M1 M2
1975.6932 V102.4 . 0.457 . . . 3.02 . 467 16 1 Evn1978 O
1975.6940 V135.3 . 0.439 . . . 3.10 . 550 89 1 Evn1978 O
1976.5173 V121.4 . 0.451 . . . 3.27 . 550 89 1 Evn1978 O
1976.5179 V115.6 . 0.458 . . . 3.39 . 365 68 1 Evn1978 O
1976.5180 V119.9 . 0.467 . . . 3.57 . 360 4 1 Evn1978 O
1976.5180 V119.9 . 0.467 . . . 3.66 . 360 10 1 Evn1978 O
1976.5180 V149.3 . 0.394 . . . 3.20 0.05 694 250 1 Evn1977 O
1977.4813 126.6 0.7 0.442 0.003 . . . . 552 20 3.8 1 McA1979b Sc
1980.4819 130.9 . 0.423 . . . . . 470 3.8 1 McA1983 Sc
1981.4677 95.5 . 0.363 . . . . . 470 3.8 1 McA1984a Sc
1983.4282 133.8 . 0.389 . . . . . 549 22 3.8 1 McA1987b Sc
1984.3783 133.8 . 0.387 . . . . . 549 22 3.8 1 McA1987b Sc
1985.4868 135.9 . 0.374 . . . . . 549 22 3.8 1 McA1987b Sc
1988.1672 140.7 . 0.363 . . . . . 549 22 3.6 1 McA1993 Sc
1988.2528 139.7 . 0.349 . . . . . 549 22 3.8 1 Msn1996b Sc
1989.3038 :142.9 . : 0.344 . . . . . 549 22 4.0 1 McA1990 Sc
1989.3995 . . < 0.05 . . . . . 2.1 1 Iso1992 S
1990.3440 143.8 . 0.344 . . . . . 549 22 4.0 1 Hrt1993 Sc
1991.5654 146. . 0.44 . . . . . 630 30 2.1 1 Miu1992 S
1993.0986 149.2 . 0.330 . . . . . 549 22 4.0 1 Msn1996b Sc
1995.3167 153.1 . 0.304 . . . . . 549 22 2.5 1 Hrt2000a Sc
1996.5397 :156.0 . : 0.282 . . . . . 549 22 2.5 1 Hrt2000a Sc
1999. 180. . 0.6 . . . 2.7 . 2100 3.6 1 Boc2001 As
2000.40 170.5 3.1 0.292 0.010 3.33 . 6.02 0.12 1250 380 3.6 1 Sht2002 A
2000.40 . . . . 3.86 . 6.80 0.05 2200 480 3.6 1 Sht2002 A
160526.23-194819.4 ADS 9913 H 3 7AC HD 144217 HIP 78820 16054-1948 N
Date PA Sep M1 M2
1975.6932 V102.1 . 2.242 . . . 2.21 . 467 16 1 Evn1978 O
1975.6940 V314.8 . 4.013 . . . 2.33 . 550 89 1 Evn1978 O
1976.5173 V302.3 . 2.856 . . . 2.24 . 550 89 1 Evn1978 O
1976.5179 V295.2 . 0.804 . . . 2.77 . 365 68 1 Evn1978 O
1976.5180 V308.1 . 4.689 . . . 2.58 . 360 4 1 Evn1978 O
1976.5180 V308.1 . 4.689 . . . 2.71 . 360 10 1 Evn1978 O
1976.5180 V313.0 . 5.981 . . . 2.1 0.05 467 16 1 Evn1977 O
1976.5180 V313.0 . 5.981 . . . 2.0 0.33 547 24 1 Evn1977 O
1976.5180 V313.0 . 5.981 . . . 2.30 0.03 694 250 1 Evn1977 O
1991.25 20.6 . 13.66 . 2.594 0.010 4.924 0.073 511 222 0.3 1 HIP1997a Hh
1991.25 . . . . 2.608 0.004 4.831 0.008 530 100 1.4 1 TYC1997 Ht
1991.25 . . . . 2.528 0.004 4.794 0.006 430 90 1.4 1 TYC1997 Ht
1991.65 20.0 . 13.571 . 2.592 0.009 4.517 0.009 530 100 1.4 1 TYC2000b Ht
1991.65 . . . . 2.519 0.014 4.516 0.014 430 90 1.4 1 TYC2000b Ht
2003.290 19.9 . 13.55 . . . . . 550 0.7 1 WSI2004b Su
2005.498 19.8 . 13.56 . . . . . 550 24 0.7 1 WSI2006b Su
160526.55-194806.6 ADS 9913 MCA 42CE HD 144218 HIP 78821 16054-1948 N O
Date PA Sep M1 M2
1971.363 308.2 . 0.097 . . . . . . 6 OCC1972 O
1971.363 311.6 . 0.099 . . . . . . 1 OCC1971 O
1976.4574 358.8 0.6 0.127 0.004 . . . . 552 20 3.8 1 McA1978b Sc
1976.5180 V320.2 . 0.091 . . . 2.1 0.1 694 250 1 Evn1977 O
1978.1501 10.5 1.5 0.129 0.010 . . . . 470 3.8 1 McA1980b Sc
1978.3112 12.6 . 0.126 . . . . . 470 2.1 1 McA1984b Sc
1979.5290 18.1 . 0.168 . . . . . 470 3.8 1 McA1982d Sc
1979.5318 20.2 . 0.147 . . . . . 511 41a 3.8 1 McA1982d Sc
1980.4765 31.7 . 0.105 . . . . . 470 3.8 1 McA1983 Sc
1981.4568 37.1 . 0.126 . . . . . 470 3.8 1 McA1984a Sc
1981.4677 37.1 . 0.112 . . . . . 470 3.8 1 McA1984a Sc
1981.4704 41.1 . 0.111 . . . . . 470 3.8 1 McA1984a Sc
1983.4226 67.9 . 0.110 . . . . . 549 22 3.8 1 McA1987b Sc
1984.3783 84.9 . 0.088 . . . . . 549 22 3.8 1 McA1987b Sc
1985.2495 75.0 4.1 0.090 0.013 . . . . 625 75a 1.9 2 Bnu1986 S
1985.4873 . . < 0.030 . . . . . 549 22 3.8 1 Msn1996b Sc
1987.2730 . . < 0.030 . . . . . 549 22 3.8 1 Msn1996b Sc
1988.166 . . < 0.038 . . . . . 549 22 3.6 1 McA1993 Sc
1988.2532 . . < 0.030 . . . . . 549 22 3.8 1 Msn1996b Sc
1989.3038 121.0 . 0.092 . . . . . 549 22 4.0 1 McA1990 Sc
1993.0986 158.6 . 0.119 . . . . . 549 22 4.0 1 Hrt2000a Sc
1995.3167 177.3 . 0.115 . . . . . 549 22 2.5 1 Hrt1997 Sc
1996.1842 181.6 . 0.121 . . . . . 549 22 4.0 1 Hrt2000a Sc
2000.40 36.3 2.5 0.119 0.005 5.96 . 7.43 0.05 2200 480 3.6 1 Sht2002 A
2009.2630 312.9 0.1 0.1034 0.0010 . . 2.3 . 551 22 4.1 1 Tok2010 S
2009.2630 312.6 1.1 0.1036 0.0007 . . 2.1 . 657 5 4.1 1 Tok2010 S
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
NSV 7424 2.61 2.67 V
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Adelaide 138.6 -34.9 124km 21 23 44
Bendigo 144.3 -36.8 17km 21 35 10
Canberra 149.2 -35.3 235km 21 44 27
Melbourne 145.0 -37.8 86km 21 36 24
Perth 115.9 -32.0 322km 20 37 23
Lunar Limb Profile
