Predictions for Grazing Occultation of ZC2495, 2015 Aug 24
Graze profile
Grazing Occultation of 2495SA0 Magnitude 6.0 [Red = 5.9]
Date: 2015 Aug 24 12h 41m, to 2015 Aug 24 12h 49m
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
167 0 0 -40 0 34 12 40 35 27 269 1.97 176.8 172.52 9.14S
167 30 0 -39 51 18 12 41 2 26 268 2.01 176.7 172.49 9.17S
168 0 0 -39 42 0 12 41 29 26 268 2.06 176.7 172.47 9.20S
168 30 0 -39 32 38 12 41 55 25 267 2.10 176.7 172.44 9.22S
169 0 0 -39 23 14 12 42 21 25 267 2.15 176.6 172.41 9.25S
169 30 0 -39 13 47 12 42 47 24 266 2.20 176.6 172.39 9.27S
170 0 0 -39 4 17 12 43 12 24 266 2.24 176.6 172.36 9.30S
170 30 0 -38 54 44 12 43 36 24 266 2.30 176.6 172.34 9.32S
171 0 0 -38 45 9 12 44 0 23 265 2.35 176.5 172.32 9.34S
171 30 0 -38 35 31 12 44 24 23 265 2.41 176.5 172.30 9.36S
172 0 0 -38 25 51 12 44 47 22 264 2.46 176.5 172.28 9.38S
172 30 0 -38 16 8 12 45 10 22 264 2.52 176.5 172.26 9.40S
173 0 0 -38 6 24 12 45 32 21 263 2.59 176.5 172.24 9.42S
173 30 0 -37 56 37 12 45 53 21 263 2.65 176.5 172.22 9.44S
174 0 0 -37 46 48 12 46 15 20 263 2.72 176.4 172.21 9.46S
174 30 0 -37 36 58 12 46 35 20 262 2.80 176.4 172.19 9.47S
175 0 0 -37 27 6 12 46 56 19 262 2.87 176.4 172.18 9.49S
175 30 0 -37 17 12 12 47 16 19 262 2.95 176.4 172.16 9.50S
176 0 0 -37 7 16 12 47 35 18 261 3.03 176.4 172.15 9.51S
176 30 0 -36 57 20 12 47 54 18 261 3.12 176.4 172.14 9.53S
177 0 0 -36 47 21 12 48 12 17 260 3.22 176.4 172.12 9.54S
177 30 0 -36 37 22 12 48 30 17 260 3.31 176.3 172.11 9.55S
178 0 0 -36 27 21 12 48 47 16 260 3.42 176.3 172.10 9.56S
178 30 0 -36 17 20 12 49 4 16 259 3.53 176.3 172.09 9.57S
179 0 0 -36 7 17 12 49 20 15 259 3.64 176.3 172.09 9.58S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level. The path
is adjusted for the effects of refraction at low moon altitudes.
2495 is triple:
Graze prediction is based on the mean position of AB 6.34 7.56 2.31" 263.3
(BU 126) Graze path of A 0.07 km south, and 1.1 secs later compared to prediction
Graze path of B 0.20 km north, and 3.5 secs earlier compared to prediction
AB 6.34 7.56 2.31" 263.3 (BU 126) Graze path of B 0.27 km north, and 4.6 secs earlier compared to A
AC 6.3 11.2 12.1" 137.6 (BU 126) Graze path of C 20.06 km north, and 15.2 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 -8.10 Lat -7.11
P +173.22 D -7.88
Illumination of moon 67%+
Elongation of Moon 109
Vertical Profile Scale 2.14 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.84 deg/min
At longitude 173.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
5.4 5.0 6.4 7.1 7.5 7.8 8.0 8.1
7.4 5.2 6.6 7.3 7.8 8.1 8.3 8.4
9.4 5.2 6.6 7.4 7.8 8.1 8.3 8.4
11.4 5.3 6.7 7.4 7.8 8.1 8.3 8.4
13.4 5.3 6.7 7.4 7.8 8.1 8.3 8.4
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
17199-1745BU 126AB 1873 2012 67 250 263 1.8 2.3 6.34 7.56 A2Vnn +005-024 -17 4773 171953.35-174523.3
17199-1745BU 126AC 1879 1998 12 141 138 11.6 12.0 6.34 11.2 A2Vnn +005-024 171953.35-174523.3
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Auckland 174.8 -36.9 63km 12 46 48
MidNZ 173.0 -41.0 295km 12 45 32
Lunar Limb Profile
