Predictions for Grazing Occultation of ZC 2275, 2013 Feb 4, near Brisbane
Graze profile
Grazing Occultation of 2275cB2 Magnitude 6.0 [Red = 0.0] s
R2275 = 47 Librae
Date: 2013 Feb 04 15h 57m, to 2013 Feb 04 16h 3m
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
149 0 0 -25 15 47 15 57 15 21 102 2.65 195.4 182.09 3.31S
149 30 0 -25 29 35 15 57 41 21 102 2.57 195.5 182.12 3.34S
150 0 0 -25 43 26 15 58 7 22 102 2.50 195.5 182.15 3.37S
150 30 0 -25 57 21 15 58 34 22 102 2.43 195.5 182.18 3.39S
151 0 0 -26 11 20 15 59 1 23 101 2.36 195.6 182.20 3.42S
151 30 0 -26 25 21 15 59 30 24 101 2.29 195.6 182.22 3.44S
152 0 0 -26 39 25 15 59 59 24 101 2.23 195.6 182.25 3.47S
152 30 0 -26 53 32 16 0 29 25 100 2.17 195.6 182.27 3.49S
153 0 0 -27 7 42 16 0 59 25 100 2.11 195.6 182.29 3.51S
153 30 0 -27 21 55 16 1 30 26 100 2.06 195.7 182.31 3.53S
154 0 0 -27 36 10 16 2 2 27 99 2.00 195.7 182.33 3.55S
154 30 0 -27 50 26 16 2 35 27 99 1.95 195.7 182.35 3.56S
155 0 0 -28 4 45 16 3 8 28 98 1.90 195.7 182.36 3.58S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
2275 is variable:
2275 = NSV 7327, 5.89 to 5.96, V
2275 is double:
Graze prediction is based on the mean position of AB 6.04 8.50 0.50" 115.6
(HU 1274) Graze path of A 0.02 km south, and 0.1 secs earlier compared to prediction
Graze path of B 0.17 km north, and 0.8 secs later compared to prediction
AB 6.04 8.50 0.50" 115.6 (HU 1274) Graze path of B 0.19 km north, and 0.9 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 -2.35 Lat -1.45
P +182.30 D -1.09
Illumination of moon 37%-
Elongation of Moon 75
Vertical Profile Scale 2.07 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.90 deg/min
At longitude 152.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-0.5 3.1 4.4 5.1 5.5 5.8 5.9 6.0
1.5 4.8 6.2 7.0 7.4 7.7 7.9 8.1
3.5 4.8 6.2 7.0 7.4 7.7 8.0 8.1
5.5 5.6 7.0 7.8 8.3 8.6 8.9 9.0
7.5 5.6 7.0 7.8 8.3 8.6 8.9 9.0
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
15550-1923HU 1274 1904 2009 38 154 117 0.4 0.5 6.04 8.50 B5V -010-014 -010-014 -18 4195 NVD 155500.37-192258.4
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Interferometric catalogue entries
155500.37-192258.4 ADS 9834 HU 1274 HD 142378 HIP 77939 15550-1923 N
Date PA Sep M1 M2
1983.4254 121.4 . 0.567 . . . . . 549 22 3.8 1 McA1987b Sc
1985.5199 122.2 . 0.561 . . . . . 549 22 3.6 1 McA1987a Sc
1987.2726 121.0 . 0.563 . . . . . 549 22 3.8 1 McA1989 Sc
1988.1658 121.3 . 0.559 . . . . . 549 22 3.6 1 McA1993 Sc
1989.2385 120.9 . 0.561 . . . . . 549 22 3.8 1 McA1990 Sc
1989.3118 120.6 . 0.552 . . . . . 549 22 4.0 1 McA1990 Sc
1990.2625 118.6 . 0.550 . . . . . 549 22 3.8 1 Hrt1992b Sc
1990.3440 121.6 . 0.555 . . . . . 549 22 4.0 1 Hrt1993 Sc
1991.25 121.2 . 0.553 . 6.111 0.003 8.118 0.016 511 222 0.3 1 HIP1997a Hh
1991.25 . . . . 6.15 . 7.97 0.01 505 97 0.3 1 Fab2000a Hh
1991.25 . . . . 6.09 . 8.21 0.01 435 70 0.3 1 Fab2000a Hh
1991.56 117.5 . 0.67 . 6.04 0.01 8.50 0.02 530 100 1.4 1 TYC2002 Ht
1991.56 . . . . 5.99 0.01 8.93 0.02 430 90 1.4 1 TYC2002 Ht
1994.5187 120.7 . 0.552 . . . . . 503 40 0.8 1 Hor2006c S
1994.5187 120.3 . 0.545 . . . . . 503 40 0.8 1 Hor2006c S
1994.5188 120.2 0.8 0.550 0.005 . . . . 503 40 0.8 1 Hor1996 S
2000.40 119.7 0.5 0.524 0.006 6.12 . 8.01 0.02 1250 380 3.6 1 Sht2002 A
2000.40 . . . . 6.13 . 7.78 0.01 2200 480 3.6 1 Sht2002 A
2000.43 119.1 . 0.52 . 6.56 . 8.09 . 2154 323 3.6 1 Kou2005 A
2009.2658 116.5 0.0 0.4751 0.0003 . . 2.0 . 551 22 4.1 1 Tok2010 S
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
NSV 7327 5.89 5.96 V
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Brisbane 153.1 -27.5 31km 16 1 2
Bundaberg 152.3 -24.8 198km 16 0 19
Rockhampton 150.5 -23.4 256km 15 58 34
Lunar Limb Profile
