Grazing Occultation of 812 SF8 Magnitude 8.0
Date 2005 April 13 (Mittwoch) Nominal site altitude 0m
E. Longit. Latitude U.T. Sun Moon TanZ PA WA CA
o ' " o ' " h m s Alt Alt Az o o o
6 0 0 50 12 39 19 47 19 38 269 1.29 1.5 4.22 7.28N
6 3 0 50 11 29 19 47 22 38 269 1.30 1.5 4.22 7.29N
6 6 0 50 10 20 19 47 26 38 269 1.30 1.5 4.23 7.30N
6 9 0 50 9 11 19 47 29 38 270 1.30 1.5 4.24 7.30N
6 12 0 50 8 1 19 47 32 38 270 1.30 1.6 4.25 7.31N
6 15 0 50 6 51 19 47 36 38 270 1.30 1.6 4.25 7.32N
6 18 0 50 5 42 19 47 39 37 270 1.30 1.6 4.26 7.33N
6 21 0 50 4 32 19 47 43 37 270 1.31 1.6 4.27 7.33N
6 24 0 50 3 22 19 47 46 37 270 1.31 1.6 4.28 7.34N
6 27 0 50 2 12 19 47 49 37 270 1.31 1.6 4.29 7.35N
6 30 0 50 1 2 19 47 53 37 270 1.31 1.6 4.29 7.36N
6 33 0 49 59 51 19 47 56 37 270 1.31 1.6 4.30 7.36N
6 36 0 49 58 41 19 47 59 37 270 1.32 1.6 4.31 7.37N
6 39 0 49 57 31 19 48 3 37 270 1.32 1.6 4.32 7.38N
6 42 0 49 56 20 19 48 6 37 270 1.32 1.6 4.32 7.39N
6 45 0 49 55 9 19 48 10 37 270 1.32 1.6 4.33 7.39N
6 48 0 49 53 59 19 48 13 37 270 1.32 1.6 4.34 7.40N
6 51 0 49 52 48 19 48 16 37 270 1.33 1.7 4.35 7.41N
6 54 0 49 51 37 19 48 20 37 270 1.33 1.7 4.35 7.42N
6 57 0 49 50 26 19 48 23 37 271 1.33 1.7 4.36 7.42N
7 0 0 49 49 15 19 48 26 37 271 1.33 1.7 4.37 7.43N
7 3 0 49 48 4 19 48 30 37 271 1.33 1.7 4.38 7.44N
7 6 0 49 46 52 19 48 33 37 271 1.34 1.7 4.38 7.45N
7 9 0 49 45 41 19 48 36 37 271 1.34 1.7 4.39 7.46N
7 12 0 49 44 29 19 48 40 37 271 1.34 1.7 4.40 7.46N
7 15 0 49 43 18 19 48 43 37 271 1.34 1.7 4.41 7.47N
7 18 0 49 42 6 19 48 46 37 271 1.34 1.7 4.41 7.48N
7 21 0 49 40 54 19 48 50 37 271 1.35 1.7 4.42 7.48N
7 24 0 49 39 42 19 48 53 37 271 1.35 1.7 4.43 7.49N
7 27 0 49 38 30 19 48 56 37 271 1.35 1.7 4.44 7.50N
7 30 0 49 37 18 19 49 0 36 271 1.35 1.8 4.44 7.51N
7 33 0 49 36 6 19 49 3 36 271 1.35 1.8 4.45 7.51N
7 36 0 49 34 54 19 49 6 36 271 1.36 1.8 4.46 7.52N
7 39 0 49 33 42 19 49 10 36 271 1.36 1.8 4.47 7.53N
7 42 0 49 32 29 19 49 13 36 271 1.36 1.8 4.47 7.54N
7 45 0 49 31 17 19 49 16 36 272 1.36 1.8 4.48 7.54N
7 48 0 49 30 4 19 49 20 36 272 1.37 1.8 4.49 7.55N
7 51 0 49 28 51 19 49 23 36 272 1.37 1.8 4.50 7.56N
7 54 0 49 27 38 19 49 26 36 272 1.37 1.8 4.50 7.57N
7 57 0 49 26 25 19 49 30 36 272 1.37 1.8 4.51 7.57N
8 0 0 49 25 12 19 49 33 36 272 1.37 1.8 4.52 7.58N
8 3 0 49 23 59 19 49 36 36 272 1.38 1.8 4.52 7.59N
8 6 0 49 22 46 19 49 40 36 272 1.38 1.8 4.53 7.60N
8 9 0 49 21 32 19 49 43 36 272 1.38 1.8 4.54 7.60N
8 12 0 49 20 19 19 49 46 36 272 1.38 1.9 4.55 7.61N
8 15 0 49 19 6 19 49 50 36 272 1.38 1.9 4.55 7.62N
8 18 0 49 17 52 19 49 53 36 272 1.39 1.9 4.56 7.63N
8 21 0 49 16 38 19 49 56 36 272 1.39 1.9 4.57 7.63N
8 24 0 49 15 24 19 50 0 36 272 1.39 1.9 4.58 7.64N
8 27 0 49 14 10 19 50 3 36 272 1.39 1.9 4.58 7.65N
8 30 0 49 12 56 19 50 6 36 272 1.40 1.9 4.59 7.65N
8 33 0 49 11 42 19 50 10 36 273 1.40 1.9 4.60 7.66N
8 36 0 49 10 28 19 50 13 36 273 1.40 1.9 4.61 7.67N
8 39 0 49 9 14 19 50 16 35 273 1.40 1.9 4.61 7.68N
8 42 0 49 7 59 19 50 20 35 273 1.40 1.9 4.62 7.68N
8 45 0 49 6 45 19 50 23 35 273 1.41 1.9 4.63 7.69N
8 48 0 49 5 30 19 50 26 35 273 1.41 1.9 4.63 7.70N
8 51 0 49 4 16 19 50 29 35 273 1.41 1.9 4.64 7.71N
8 54 0 49 3 1 19 50 33 35 273 1.41 2.0 4.65 7.71N
8 57 0 49 1 46 19 50 36 35 273 1.42 2.0 4.66 7.72N
9 0 0 49 0 31 19 50 39 35 273 1.42 2.0 4.66 7.73N
9 3 0 48 59 16 19 50 43 35 273 1.42 2.0 4.67 7.73N
9 6 0 48 58 1 19 50 46 35 273 1.42 2.0 4.68 7.74N
9 9 0 48 56 46 19 50 49 35 273 1.42 2.0 4.68 7.75N
9 12 0 48 55 30 19 50 53 35 273 1.43 2.0 4.69 7.76N
9 15 0 48 54 15 19 50 56 35 273 1.43 2.0 4.70 7.76N
9 18 0 48 52 59 19 50 59 35 273 1.43 2.0 4.71 7.77N
9 21 0 48 51 44 19 51 2 35 274 1.43 2.0 4.71 7.78N
9 24 0 48 50 28 19 51 6 35 274 1.44 2.0 4.72 7.78N
9 27 0 48 49 12 19 51 9 35 274 1.44 2.0 4.73 7.79N
9 30 0 48 47 56 19 51 12 35 274 1.44 2.0 4.73 7.80N
9 33 0 48 46 40 19 51 16 35 274 1.44 2.0 4.74 7.81N
9 36 0 48 45 24 19 51 19 35 274 1.45 2.1 4.75 7.81N
9 39 0 48 44 8 19 51 22 35 274 1.45 2.1 4.76 7.82N
9 42 0 48 42 51 19 51 25 35 274 1.45 2.1 4.76 7.83N
9 45 0 48 41 35 19 51 29 35 274 1.45 2.1 4.77 7.83N
9 48 0 48 40 19 19 51 32 35 274 1.45 2.1 4.78 7.84N
9 51 0 48 39 2 19 51 35 34 274 1.46 2.1 4.78 7.85N
9 54 0 48 37 45 19 51 38 34 274 1.46 2.1 4.79 7.85N
9 57 0 48 36 29 19 51 42 34 274 1.46 2.1 4.80 7.86N
10 0 0 48 35 12 19 51 45 34 274 1.46 2.1 4.80 7.87N
10 3 0 48 33 55 19 51 48 34 274 1.47 2.1 4.81 7.88N
10 6 0 48 32 38 19 51 51 34 274 1.47 2.1 4.82 7.88N
10 9 0 48 31 21 19 51 55 34 274 1.47 2.1 4.82 7.89N
10 12 0 48 30 3 19 51 58 34 275 1.47 2.1 4.83 7.90N
10 15 0 48 28 46 19 52 1 34 275 1.48 2.1 4.84 7.90N
10 18 0 48 27 29 19 52 4 34 275 1.48 2.2 4.85 7.91N
10 21 0 48 26 11 19 52 8 34 275 1.48 2.2 4.85 7.92N
10 24 0 48 24 53 19 52 11 34 275 1.48 2.2 4.86 7.92N
10 27 0 48 23 36 19 52 14 34 275 1.49 2.2 4.87 7.93N
10 30 0 48 22 18 19 52 17 34 275 1.49 2.2 4.87 7.94N
10 33 0 48 21 0 19 52 21 34 275 1.49 2.2 4.88 7.94N
10 36 0 48 19 42 19 52 24 34 275 1.49 2.2 4.89 7.95N
10 39 0 48 18 24 19 52 27 34 275 1.50 2.2 4.89 7.96N
10 42 0 48 17 6 19 52 30 34 275 1.50 2.2 4.90 7.97N
10 45 0 48 15 47 19 52 34 34 275 1.50 2.2 4.91 7.97N
10 48 0 48 14 29 19 52 37 34 275 1.50 2.2 4.91 7.98N
10 51 0 48 13 11 19 52 40 34 275 1.51 2.2 4.92 7.99N
10 54 0 48 11 52 19 52 43 34 275 1.51 2.2 4.93 7.99N
10 57 0 48 10 33 19 52 47 34 275 1.51 2.2 4.93 8.00N
11 0 0 48 9 15 19 52 50 33 275 1.51 2.2 4.94 8.01N
11 3 0 48 7 56 19 52 53 33 276 1.52 2.3 4.95 8.01N
11 6 0 48 6 37 19 52 56 33 276 1.52 2.3 4.96 8.02N
11 9 0 48 5 18 19 52 59 33 276 1.52 2.3 4.96 8.03N
11 12 0 48 3 59 19 53 3 33 276 1.52 2.3 4.97 8.03N
11 15 0 48 2 40 19 53 6 33 276 1.53 2.3 4.98 8.04N
11 18 0 48 1 20 19 53 9 33 276 1.53 2.3 4.98 8.05N
11 21 0 48 0 1 19 53 12 33 276 1.53 2.3 4.99 8.05N
11 24 0 47 58 42 19 53 15 33 276 1.53 2.3 5.00 8.06N
11 27 0 47 57 22 19 53 19 33 276 1.54 2.3 5.00 8.07N
11 30 0 47 56 2 19 53 22 33 276 1.54 2.3 5.01 8.07N
11 33 0 47 54 43 19 53 25 33 276 1.54 2.3 5.02 8.08N
11 36 0 47 53 23 19 53 28 33 276 1.54 2.3 5.02 8.09N
11 39 0 47 52 3 19 53 31 33 276 1.55 2.3 5.03 8.09N
11 42 0 47 50 43 19 53 35 33 276 1.55 2.3 5.04 8.10N
11 45 0 47 49 23 19 53 38 33 276 1.55 2.3 5.04 8.11N
11 48 0 47 48 3 19 53 41 33 276 1.55 2.4 5.05 8.11N
11 51 0 47 46 42 19 53 44 33 276 1.56 2.4 5.06 8.12N
11 54 0 47 45 22 19 53 47 33 277 1.56 2.4 5.06 8.13N
11 57 0 47 44 2 19 53 51 33 277 1.56 2.4 5.07 8.13N
12 0 0 47 42 41 19 53 54 33 277 1.57 2.4 5.07 8.14N
12 3 0 47 41 20 19 53 57 33 277 1.57 2.4 5.08 8.15N
12 6 0 47 40 0 19 54 0 32 277 1.57 2.4 5.09 8.15N
12 9 0 47 38 39 19 54 3 32 277 1.57 2.4 5.09 8.16N
12 12 0 47 37 18 19 54 6 32 277 1.58 2.4 5.10 8.17N
12 15 0 47 35 57 19 54 10 32 277 1.58 2.4 5.11 8.17N
12 18 0 47 34 36 19 54 13 32 277 1.58 2.4 5.11 8.18N
12 21 0 47 33 15 19 54 16 32 277 1.58 2.4 5.12 8.18N
12 24 0 47 31 53 19 54 19 32 277 1.59 2.4 5.13 8.19N
12 27 0 47 30 32 19 54 22 32 277 1.59 2.4 5.13 8.20N
12 30 0 47 29 10 19 54 25 32 277 1.59 2.4 5.14 8.20N
12 33 0 47 27 49 19 54 29 32 277 1.60 2.5 5.15 8.21N
12 36 0 47 26 27 19 54 32 32 277 1.60 2.5 5.15 8.22N
12 39 0 47 25 6 19 54 35 32 277 1.60 2.5 5.16 8.22N
12 42 0 47 23 44 19 54 38 32 277 1.60 2.5 5.17 8.23N
12 45 0 47 22 22 19 54 41 32 277 1.61 2.5 5.17 8.24N
12 48 0 47 21 0 19 54 44 32 278 1.61 2.5 5.18 8.24N
12 51 0 47 19 38 19 54 47 32 278 1.61 2.5 5.18 8.25N
12 54 0 47 18 16 19 54 51 32 278 1.62 2.5 5.19 8.26N
12 57 0 47 16 53 19 54 54 32 278 1.62 2.5 5.20 8.26N
13 0 0 47 15 31 19 54 57 32 278 1.62 2.5 5.20 8.27N
13 3 0 47 14 9 19 55 0 32 278 1.62 2.5 5.21 8.27N
13 6 0 47 12 46 19 55 3 32 278 1.63 2.5 5.22 8.28N
13 9 0 47 11 24 19 55 6 32 278 1.63 2.5 5.22 8.29N
13 12 0 47 10 1 19 55 9 31 278 1.63 2.5 5.23 8.29N
13 15 0 47 8 38 19 55 13 31 278 1.64 2.5 5.24 8.30N
13 18 0 47 7 15 19 55 16 31 278 1.64 2.5 5.24 8.31N
13 21 0 47 5 52 19 55 19 31 278 1.64 2.6 5.25 8.31N
13 24 0 47 4 29 19 55 22 31 278 1.64 2.6 5.25 8.32N
13 27 0 47 3 6 19 55 25 31 278 1.65 2.6 5.26 8.33N
13 30 0 47 1 43 19 55 28 31 278 1.65 2.6 5.27 8.33N
13 33 0 47 0 20 19 55 31 31 278 1.65 2.6 5.27 8.34N
13 36 0 46 58 56 19 55 34 31 278 1.66 2.6 5.28 8.34N
13 39 0 46 57 33 19 55 37 31 279 1.66 2.6 5.29 8.35N
13 42 0 46 56 9 19 55 41 31 279 1.66 2.6 5.29 8.36N
13 45 0 46 54 45 19 55 44 31 279 1.67 2.6 5.30 8.36N
13 48 0 46 53 22 19 55 47 31 279 1.67 2.6 5.30 8.37N
13 51 0 46 51 58 19 55 50 31 279 1.67 2.6 5.31 8.37N
13 54 0 46 50 34 19 55 53 31 279 1.67 2.6 5.32 8.38N
13 57 0 46 49 10 19 55 56 31 279 1.68 2.6 5.32 8.39N
14 0 0 46 47 46 19 55 59 31 279 1.68 2.6 5.33 8.39N
14 3 0 46 46 22 19 56 2 31 279 1.68 2.6 5.33 8.40N
14 6 0 46 44 57 19 56 5 31 279 1.69 2.6 5.34 8.41N
14 9 0 46 43 33 19 56 8 31 279 1.69 2.7 5.35 8.41N
14 12 0 46 42 9 19 56 11 31 279 1.69 2.7 5.35 8.42N
14 15 0 46 40 44 19 56 14 31 279 1.70 2.7 5.36 8.42N
14 18 0 46 39 20 19 56 17 30 279 1.70 2.7 5.36 8.43N
14 21 0 46 37 55 19 56 21 30 279 1.70 2.7 5.37 8.44N
14 24 0 46 36 30 19 56 24 30 279 1.71 2.7 5.38 8.44N
14 27 0 46 35 5 19 56 27 30 279 1.71 2.7 5.38 8.45N
14 30 0 46 33 40 19 56 30 30 279 1.71 2.7 5.39 8.45N
14 33 0 46 32 15 19 56 33 30 280 1.72 2.7 5.39 8.46N
14 36 0 46 30 50 19 56 36 30 280 1.72 2.7 5.40 8.47N
14 39 0 46 29 25 19 56 39 30 280 1.72 2.7 5.41 8.47N
14 42 0 46 28 0 19 56 42 30 280 1.73 2.7 5.41 8.48N
14 45 0 46 26 34 19 56 45 30 280 1.73 2.7 5.42 8.48N
14 48 0 46 25 9 19 56 48 30 280 1.73 2.7 5.42 8.49N
14 51 0 46 23 44 19 56 51 30 280 1.74 2.7 5.43 8.50N
14 54 0 46 22 18 19 56 54 30 280 1.74 2.7 5.44 8.50N
14 57 0 46 20 52 19 56 57 30 280 1.74 2.7 5.44 8.51N
Path coordinates are referred to WGS84 (as used by GPS).
812 is triple : 8.6 8.7 0.70" 262.0 : 7.8 13.2 24" 278.0
Graze Path of component #2 0.27km North, and 1.5 secs. earlier cf. primary.
Graze Path of component #3 4.52km South, and 51.7 secs. earlier cf. primary.
Librations Long +2.70 Lat -5.46
P +5.2 D +5.9
Illumination of moon 24%+
Elongation of Moon 59
Vertical Profile Scale 2.13 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.76 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
4.5 5.8 7.3 8.1 8.6 9.0 9.3 9.5
6.5 5.9 7.3 8.1 8.7 9.0 9.3 9.5
8.5 5.9 7.3 8.1 8.7 9.1 9.3 9.6
10.5 5.9 7.3 8.2 8.7 9.1 9.4 9.6
12.5 5.9 7.4 8.2 8.8 9.1 9.4 9.6
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