Predictions for Grazing Occultation of ZC 2275, 2013 Feb 4
Graze profile
Grazing Occultation of 2275cB2 Magnitude 6.0 [Red = 0.0] s
R2275 = 47 Librae
Date: 2013 Feb 04 16h 31m, to 2013 Feb 04 16h 40m
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
174 0 0 -36 58 27 16 31 30 49 76 0.86 195.1 181.74 2.95S
174 10 0 -37 2 44 16 31 47 50 76 0.85 195.1 181.73 2.95S
174 20 0 -37 6 59 16 32 5 50 76 0.85 195.1 181.71 2.93S
174 30 0 -37 11 14 16 32 23 50 76 0.84 195.0 181.70 2.91S
174 40 0 -37 15 28 16 32 40 50 75 0.84 195.0 181.68 2.90S
174 50 1 -37 19 42 16 32 58 50 75 0.83 195.0 181.65 2.87S
175 0 1 -37 23 54 16 33 16 50 75 0.83 195.0 181.63 2.85S
175 10 1 -37 28 6 16 33 34 51 74 0.82 195.0 181.61 2.83S
175 20 1 -37 32 17 16 33 51 51 74 0.82 194.9 181.59 2.81S
175 30 1 -37 36 27 16 34 9 -12 51 74 0.81 194.9 181.58 2.79S
175 40 1 -37 40 37 16 34 27 -12 51 74 0.81 194.9 181.56 2.77S
175 50 1 -37 44 46 16 34 45 -12 51 73 0.80 194.9 181.54 2.75S
176 0 1 -37 48 53 16 35 3 -11 51 73 0.80 194.9 181.52 2.74S
176 10 2 -37 53 0 16 35 21 -11 52 73 0.79 194.9 181.50 2.72S
176 20 2 -37 57 7 16 35 39 -11 52 72 0.79 194.8 181.48 2.70S
176 30 2 -38 1 12 16 35 57 -11 52 72 0.78 194.8 181.46 2.68S
176 40 2 -38 5 17 16 36 15 -11 52 72 0.78 194.8 181.44 2.66S
176 50 2 -38 9 20 16 36 33 -10 52 71 0.78 194.8 181.42 2.63S
177 0 2 -38 13 23 16 36 51 -10 52 71 0.77 194.7 181.40 2.61S
177 10 2 -38 17 25 16 37 9 -10 53 71 0.77 194.7 181.37 2.59S
177 20 2 -38 21 26 16 37 27 -10 53 70 0.76 194.7 181.35 2.57S
177 30 3 -38 25 27 16 37 45 -10 53 70 0.76 194.7 181.33 2.55S
177 40 3 -38 29 26 16 38 3 -9 53 70 0.75 194.7 181.31 2.53S
177 50 3 -38 33 25 16 38 21 -9 53 70 0.75 194.6 181.29 2.51S
178 0 3 -38 37 22 16 38 39 -9 53 69 0.74 194.6 181.27 2.49S
178 10 3 -38 41 19 16 38 57 -9 53 69 0.74 194.6 181.24 2.46S
178 20 3 -38 45 15 16 39 16 -9 54 69 0.74 194.6 181.22 2.44S
178 30 3 -38 49 10 16 39 34 -8 54 68 0.73 194.6 181.20 2.42S
178 40 3 -38 53 4 16 39 52 -8 54 68 0.73 194.5 181.18 2.40S
178 50 3 -38 56 57 16 40 10 -8 54 68 0.72 194.5 181.15 2.37S
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 0.18 km north, and 1.0 secs later compared to prediction
AB 6.04 8.50 0.50" 115.6 (HU 1274) Graze path of B 0.20 km north, and 1.1 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 -2.68 Lat -1.45
P +181.51 D -1.12
Illumination of moon 37%-
Elongation of Moon 75
Vertical Profile Scale 2.07 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.57 deg/min
At longitude 176.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-1.3 3.3 4.7 5.5 5.9 6.3 6.5 6.7
0.7 5.1 6.6 7.4 7.9 8.3 8.5 8.7
2.7 5.1 6.6 7.4 7.9 8.3 8.6 8.8
4.7 5.9 7.4 8.2 8.8 9.2 9.5 9.7
6.7 6.0 7.4 8.3 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
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
Auckland 174.8 -36.9 41km 16 32 55
MidNZ 173.0 -41.0 429km 16 29 44
Lunar Limb Profile
