August 28th Graze

August 28th Graze

Grazing Occultation of 77495 cA0 Magnitude 8.1

Date 2005 August 28 (Sunday) Nominal site altitude 14m

E. Longit. Latitude U.T. Sun Moon TanZ PA WA CA

o ' " o ' " h m s Alt Alt Az o o o

-125 0 0 37 28 31 11 21 6 36 80 1.37 345.6 346.77 14.74N

-124 52 30 37 33 12 11 21 17 36 80 1.36 345.6 346.78 14.73N

-124 45 0 37 37 53 11 21 28 36 80 1.35 345.6 346.79 14.72N

-124 37 30 37 42 34 11 21 40 37 80 1.35 345.7 346.81 14.70N

-124 30 0 37 47 14 11 21 51 37 80 1.34 345.7 346.82 14.69N

-124 22 30 37 51 53 11 22 2 37 80 1.33 345.7 346.83 14.68N

-124 15 0 37 56 32 11 22 14 37 81 1.33 345.7 346.85 14.67N

-124 7 30 38 1 11 11 22 25 37 81 1.32 345.7 346.86 14.65N

-124 0 0 38 5 49 11 22 37 37 81 1.31 345.7 346.87 14.64N

-123 52 30 38 10 27 11 22 48 37 81 1.30 345.7 346.88 14.63N

-123 45 0 38 15 4 11 23 0 38 81 1.30 345.7 346.90 14.61N

-123 37 30 38 19 41 11 23 12 38 81 1.29 345.8 346.91 14.60N

-123 30 0 38 24 17 11 23 23 38 81 1.28 345.8 346.93 14.59N

-123 22 30 38 28 52 11 23 35 38 82 1.28 345.8 346.94 14.57N

-123 15 0 38 33 28 11 23 46 38 82 1.27 345.8 346.95 14.56N

-123 7 30 38 38 2 11 23 58 38 82 1.26 345.8 346.97 14.54N

-123 0 0 38 42 36 11 24 10 38 82 1.26 345.8 346.98 14.53N

Path coordinates are referred to WGS84 (as used by GPS).

77495 is double : 8.0 8.0 0.200" 59.0

Graze Path of component #2 0.11km South, and 0.4 secs. later cf. primary.

Librations Long +6.33 Lat -6.01

P +346.4 D +4.7

Illumination of moon 32%-

Elongation of Moon 69

Vertical Profile Scale 2.05 km/arcsec at mean distance of moon

Horizontal Scale Factor 1.64 deg/min

Limiting Magnitudes for various telescope apertures (in mm)

CA\Tdia 50 100 150 200 250 300 350

10.5 5.9 7.4 8.2 8.8 9.1 9.4 9.6

12.5 5.9 7.4 8.2 8.8 9.2 9.4 9.7

14.5 5.9 7.4 8.2 8.8 9.2 9.5 9.7

16.5 6.0 7.4 8.2 8.8 9.2 9.5 9.7

18.5 6.0 7.4 8.3 8.8 9.2 9.5 9.7

Total Occultations during this Graze

Occultation Predictions for Aug28 in August 2005

E.Long. -122 10 44.6 Lat. 39 12 13.4 Alt. 0m. T.dia 300mm. dMag 1.0

day Time P Star Sp Mag % Elon Sun Moon CA PA VA WA

y m d h m s No D V ill Alt Alt Az o o o o

05 08 28 8 5 17 r X 75881 9.4 33- 70 4 58 73S 252 300 254

05 08 28 8 57 32 r X 76320 9.6 33- 70 13 65 49S 228 281 230

05 08 28 9 9 47 r X 76382 10.1 32- 69 15 66 61N 299 353 301

05 08 28 9 18 7 r 77359 B9 9.0 32- 69 16 67 73N 286 340 288

05 08 28 9 32 0 r X 7319dA2 9.8 32- 69 19 69 48N 312 7 314

X 7319 is double : 9.7 12.2 1.10" 329.0

05 08 28 9 34 44 r X 76536 10.4 32- 69 19 69 72N 287 343 289

05 08 28 9 43 58 R 77383 F5 8.2 32- 69 21 71 84N 276 331 277

05 08 28 9 51 54 r X 76633 9.7 32- 69 22 72 68S 248 304 249

05 08 28 9 58 51 r 77396 F0 8.9 32- 69 23 73 52S 232 289 234

05 08 28 10 4 10 r X 7350 F5 9.9 32- 69 24 73 63S 243 300 244

05 08 28 10 21 27 R 77415cB9 8.3 32- 69 28 75 75S 255 314 257

77415 is double : 9.3 9.3 0.100" 135.0

05 08 28 10 21 58 r X 76825 10.2 32- 69 28 75 71N 289 347 291

05 08 28 10 35 0 r X 76956 10.0 32- 69 30 77 48S 228 287 229

05 08 28 10 59 41 r X 77054 10.3 32- 69 35 80 76N 284 344 285

05 08 28 11 17 12 r X 7475DA0 9.8 32- 69 38 83 35S 215 276 216

X 7475 is double : 10.1 7.3 8.6" 74.0

05 08 28 11 17 33 R 868SA0 7.5 32- 69 38 83 35S 215 276 216

868 is triple : 7.3 10.1 8.6" 254.0 : 7.8 11.5 52" 36.0

05 08 28 11 25 27 G 77495cA0 8.1 32- 69 39 83 14N 346 47 347

77495 is double : 8.0 8.0 0.200" 59.0

Graze of 77495cA0 nearby at Lat = +39.21 +0.60(E.Long +122.18), CA = 14.4N

28 11 25 27 Gr 77495cA0 8.1 32- 69 39 83

Closest distance to graze path is 0km at azimuth 322

05 08 28 11 28 39 r X 7483 A2 9.6 32- 69 40 84 45N 316 17 317

05 08 28 11 30 18 r X 77235 10.5 32- 68 40 84 89S 269 330 270

05 08 28 11 35 42 r X 77286 10.5 32- 68 41 85 65S 245 306 246

05 08 28 11 38 48 r X 77344 10.7 32- 68 42 85 49S 230 291 231

05 08 28 11 50 29 r X 77433 10.7 32- 68 44 87 49N 312 13 313

05 08 28 11 52 1 r X 77389 10.4 32- 68 44 87 75S 256 317 257

05 08 28 12 8 0 R 77514cK0 8.9 31- 68 47 90 48S 229 291 230

77514 is double : 9.7 9.7 0.100" 79.0

05 08 28 12 19 48 r X 77664 10.0 31- 68 50 91 38S 218 280 219

05 08 28 12 24 20 r 77521cA 9.7 31- 68 51 92 68S 248 310 249

77521 is double : 9.9 9.9 0.100" 50.0

05 08 28 12 26 29 r X 77630 10.7 31- 68 51 92 61S 242 303 243

05 08 28 12 45 23 r X 77718 11.1 31- 68 -10 55 95 84N 277 338 278

05 08 28 12 58 6 r X 77838 9.8 31- 68 -8 57 98 51S 232 292 233

05 08 28 13 0 57 r 77546 A0 9.1 31- 68 -7 58 98 59N 302 3 303

05 08 28 13 4 0 r X 77962 10.3 31- 68 -6 58 99 24S 205 265 206

05 08 28 13 7 56 r X 77987 10.3 31- 68 -6 59 100 24S 205 265 206

05 08 28 14 32 57 d 885wG7 5.6 31- 68 10 73 128 -29S 152 196 153

885 is double : 5.5 11.6 15.2" 231.0

Graze of 885wG7 nearby at Lat = +38.13 +0.16(E.Long +122.18), CA = -7.8S

28 14 49 12 Gr 885wG7 5.6 31- 67 14 76 135

Closest distance to graze path is 116km at azimuth 169

05 08 28 15 7 11 r 885wG7 5.6 31- 67 17 77 153 14S 195 219 195

885 is double : 5.5 11.6 15.2" 231.0

Last updated: 8/24/05

Contact BREIT IDEAS

PROFILE FOR *** Derek Breit B, Martinez, CA IOTA 2002 FEB ACLPPP WITH 2004Nov.03 OBSERVED GRAZE DATA

351.15 350.15 349.15 348.15 347.15 346.15 345.15 344.15 343.15 WATTS ANGLE

---------+---------+---------+---------+---------+---------+---------+---------+---------+---------

-2 -1 +0 +1 +2 MINUTES FROM C.G.

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I I I I I I I

I I I I 3 3 3 I I I

0+----------------+---------------+---------------+---------------+---------------+----------------+ PREDICTED LIMIT

I I I 3 3 I 3 4 4 I I I

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+----------------+-------------3-+-DD------------+--------------DD-----4---------+----------------+ -1 MI.

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I I 3 DD I I I DD I I

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0 DATE 8/28/2005 TIME 11 HR U.T. LIBRATIONS - LAT -6.02

STAR X 7501 PREPARED BY VERSION 99C LONG 6.36

NORTHERN LIMIT GRAZE VPC - -0.439 SEC

CENTRAL GRAZE WATTS ANGLE 347.15 HEIGHT - 0.180 SEC CUSP ANGLE 14.4 N PLOTTED BY D. W. Dunham

FOR A POINT IN LIMIT CLOSEST TO HPS - 1.639 DEG/MIN POS ANGLE 345.840 PROFILE FOR Derek Breit B

Martinez, CA VPS - 0.73 SEC/MI DISTANCE TO LIMIT 66 MI Martinez, CA

OBSERVED DATA FROM GRAZES OF ZC 538 07/27/89 X 4273 07/17/71 X 8040 09/22/70 ZC 370 08/22/70 ZC 539 08/06/69

ZC 539 08/06/69 ZC 541 08/06/69

DOUBLE, STAR, CODE - M

COMPONENT MAG. SEPARATION POS.ANGLE VERTICAL SHIFT HORIZONTAL SHIFT

PRIMARY 9.00 0.00 0 0.00 SEC. 0.00 MI. -0.21 SEC. OF TIME

SECONDRY 9.00 0.18 75 0.00 SEC. 0.00 MI. 0.21 SEC. OF TIME