An Archive of Pictorial Reductions for Past Grazes

by Walt "Rob" Robinson, webmaster

Introduction

Pictorial Reductions (PRs) are quite simply drawings that give a visual comparison of what was predicted to occur versus what was observed as reported by the observers, during a grazing occultation. This page contains a table, of the PRs of observed grazes which have been accumulated from a number of sources. These sources include those found in the Occultation Newsletter and on the Internet. A large majority of these PRs have been generated by Robert Sandy, and are located in his own personal collection. For an explanation of how to interpret his PRs, you might read his article located on his homepage. Robert allowed me to scan all the PRs he has done to date. Most of these were scanned in 800x600 screen size, with 300dpi screen resolution. You can download any of these to view on your own graphics software, by right clicking on the link, and doing a "save as". I would like to thank all those that have helped contribute to the archives. If you have any PRs that you may have generated, and would like to have them included in this listing, please let me know.

Definitions and Conventions

STAR = Designation given to the referenced star. This will be listed as either SAO Catalog number or Robertson's ZC (Zodiacal Catalog) number. Some listings show the designation with an (L) or an (R) next to the number. This was used to facility showing a large PR. When accessing the (L) designation, you will be looking at the left side of the PR; when accessing the (R) designation, the right side.

DATE = The date the event was observed. (mm-dd-yy format)

LIBR = Librations for the event. L is the Longitude Libration; B is the Latitude Libration.

ANGLE = Area of coverage of the event. WA (Watt's Angle) - the angle of the event around the limb of the moon, measured eastward from the moon's north pole. Essential for reappearance, as it locates the event with reference to lunar features. To use, mark a map of the moon around the circumference at 10 deg intervals, starting at the north pole. Mare Crisium is at about 300 deg. This provides the Watts angle scale. CA (Cusp Angle) - the angle of the event around the limb of the moon, measured from the nearest cusp. -'ve values indicate a bright limb event. The cusps are usually N (north) or S (south), but near full moon can be E (East) or W (west). If a lunar eclipse is in progress, CA gives is the % distance from the centre of the umbra, and is followed by a 'U'. Values up to 103% are possible.

Source = The person or organization who plotted the PR.

Conclusion

It is my intention of placing these PR's on the web, so that expedition leaders and observers, can have additional information to better plan for upcoming grazes. The current ACLPPP's show past grazes, that were used to generate the predicted profiles. If a past graze is listed here, with a plotted PR, then the user can now see a graphical representation of what was observed for that particular graze. Hence, the more information available, the better chance of a successful graze.

This page will be periodically updated, as more reports are scanned and added to the database. In the near future, I will also have available, the cover letters that went with some of these PRs, which will give an analysis of the observed event.

Walt "Rob" Robinson - archiver



-----------STAR----------- -----------DATE----------- -----------LIBR----------- -----------ANGLE----------- -----------SOURCE-----------
ZC/SAO
mo/dy/yr
L,B Libration
WA, CA
preparer
SAO 076640
08-21-03
unknown
348-342
Nadir
SAO 077918
03-23-91
unknown
18-15 (N)
D. Stockbauer
SAO 078009
08-16-99
+2.74, -3.15
360-352 (7N)
Terri McManus
SAO 78118
09-02-02
unknown
349-345
Nadir
SAO 078188
08-24-00
unknown
352-345
HJJ Bulder
SAO 078540
08-26-89
unknown
359-355
D. Stockbauer
SAO 079530
10-07-04
unknown
155-148
Nadir
SAO 080131
08-27-00
unknown
352-345
HJJ Bulder
SAO 093170
11-09-03
unknown
352-346
Nadir
SAO 093914
02-13-00
unknown
4--4
HJJ Bulder
SAO 095913
03-11-99
-4.31, +6.37
14-9 (12N)
R. Sandy
SAO 118620
11-09-93
-3.56, +6.99
181-189 (8S)
R. Sandy
SAO 145938
10-19-91
-4.40, -4.30
159-169 (17S)
R. Sandy
SAO 187318
11-04-89
unknown
160-164 (S)
D. Stockbauer
SAO 187716
10-08-89
-7.59, +5.03
160-160 (14S)
R. Sandy
SAO 189865
10-21-04
unknown
167-174
Nadir
ZC 0036
02-13-67
-1.25, +4.21
166-175 (12S)
R. Sandy
ZC 0036
02-02-67
-1.17, +4.22
163-171 (16S)
R. Sandy
ZC 0036
02-02-67
-1.17, +4.22
163-171 (16S)
R. Sandy
ZC 0370
08-22-70
+7.59, -5.94
350-342 (12N)
R. Sandy
ZC 0370
09-09-90
-0.16, -6.00
354-350 (6N)
R. Sandy
ZC 0370
08-22-70
+7.72, -5.94
350-340 (14N)
R. Sandy
ZC 0467
08-08-04
+5.57,-1.13
346-341
R. Sandy
ZC 0537
10-10-06
+6.92, -5.30
535-348
R. Sandy
ZC 0539(L)
ZC 0539(R)
08-06-69
+6.22, -5.69
351-341
R. Sandy
ZC 0541
02-24-88
+6.75 -6.08
176-184 (-1S)
R. Sandy
 ZC 0541
Text Analysis
08-14-09
-5.6,-5.4
356-351
R. Sandy
ZC 0552
10-25-93
unknown
unknown
Dobson
ZC 0601
03-01-93
-8.2, -1.3
15-8 (9N)
R. Sandy
ZC 0621
02-27-04
unknown
175-183
Nadir
ZC 0652
09-06-04
unknown
350-341
Nadir
ZC 0656
08-20-03
unknown
349-346
Nadir
ZC 0692
02-12-81
+2.68, +6.53
175-195 (-2S)
R. Sandy
ZC 0692
03-05-79
+7.09, +7.28
357-354 (-6N )
R. Sandy
ZC 0692(L)
ZC 0692(R)
09-22-78
+5.31, +6.73
+4.89, +6.73
179-188 (-4 to +2S)
R. Sandy
ZC 0692(L)
ZC 0692(R)
07-02-78
+4.67, +6.71
171-180 (3.1S)
R. Sandy
ZC 0692
08-05-80
+5.23, +6.64
165-175 (-7S)
R. Sandy
ZC 0692
09-12-79
+8.33, +7.28
356-347 (9N)
R. Sandy
ZC 0692(L)
ZC 0692(R)
12-30-79
+5.48, +7.27
357-350 (2N)
R. Sandy
ZC 0692
09-12-98
+5.99, +7.25
354-348
R. Sandy
ZC 0692
09-12-98
+6.11, +7.25
354-348
R. Sandy
ZC 0692(H)
04-19-99
+2.41, +6.62
178-188 (2.9S)
R. Sandy
ZC 0692(I)
04-19-99
+2.37, +6.62
180-185 (2.3S)
R. Sandy
ZC 0692(J)
04-19-99
+2.47, 6.62
178-186 (3.0S)
R. Sandy
ZC 0693
10-14-03
unknown
350-345
Nadir
ZC 0697(L)
ZC 0697(R)
08-19-95
+2.8, +4.8
359-354 (3N)
R. Sandy
ZC 0730
07-27-00
-3.95, +4.92
347-344
R. Sandy
ZC 0731
09-03-88
+7.99, -6.61
355-350 (8N)
R. Sandy
ZC 0766(K)
09-09-93
-6.52, +1.72
3-354 (3N)
R. Sandy
ZC 0814
09-13-79
+8.40, +7.40
353-350 (7N)
R. Sandy
ZC 0814
04-30-79
+4.41, +7.08
8-3 ( )
R. Sandy
ZC 0832
04-19-80
+6.4, +6.3
7-1 (1N)
R. Sandy
ZC 0885
04-11-89
+6.91, -5.66
16-11 (13-14N)
R. Sandy
ZC 0885
04-11-89
+6.81, -5.66
16-11 (13N)
Bolster
ZC 1029(L)
ZC 1029(R)
10-04-96
+4.60, +7.30
360-351 (6N)
R. Sandy
ZC 1029(L)
ZC 1029(R)
10-04-96
+4.6, +7.3
360-351 (6N)
R. Sandy
ZC 1054
09-22-00
unknown
351-345
HJJ Bulder
ZC 1089
03-16-89
+6.81, -4.84
19-13 (12N)
R. Sandy
ZC 1149
04-16-05
+0.24, -6.53
15-10
R. Sandy
ZC 1206
04-26-04
unknown
12-3
Nadir
ZC 1217
09-06-99
+4.45, +2.04
351-346
R. Sandy
ZC 1303
08-27-00
+1.18, -1.34
350-344
R. Sandy
ZC 1341
04-29-93
unknown
15-5 ( )
Poland
ZC 1410
03-30-96
unknown
7-360
Holland
ZC 1428
04-17-97
+1.38, +4.39
173-194 (-1S)
R. Sandy
ZC 1428
04-17-97
+1.38, +4.39
173-194 (-1S)
R. Sandy
ZC 1465
06-17-91
+5.90, +5.91
17-10 ( )
R. Sandy
ZC 1468
10-08-96
-0.13, +4.67
170-179 (+1.1BB)
R. Sandy
ZC 1487
12-27-88
+2.48, -0.44
27-18 ( )
Japan
ZC 1506
06-07-00
unknown
174-182
HJJ Bulder
ZC 1625
06-08-00
unknown
174-182
HJJ Bulder
ZC 946
03-31-01
unknown
3-358
Nadir
ZC 946
03-31-01
unknown
3-358
Nadir
ZC 946
03-31-01
unknown
3-358
Nadir
ZC 1110
01-09-01
unknown
352-344
Nadir
ZC 1735
12-13-06
+1.46, +1.59
198-202
R. Sandy
ZC 1178
03-23-02
unknown
175-182
Nadir
ZC 1815
12-31-88
-1.38, +4.11
190-196 (12S)
R. Sandy
ZC 1925
Text Analysis
06-09-95
-6.78, +2.08
170-181 ( )
R. Sandy
ZC 2196
12-22-00
unknown
190-197
HJJ Bulder
ZC 2271
02-02-97
-7.37,-5.00
180-185 ( )
H. Bulder
ZC 2276
08-28-90
-0.10, +6.96
167-176 (8S)
R. Sandy
ZC 2391
09-19-77
-0.28, -4.76
166-175 (7S)
R. Sandy
ZC 2399(L)
ZC 2399(R)
02-20-98
-6.34, -6.22
186-194 (8.5S)
R. Sandy
ZC 2457(L)
ZC 2457(R)
08-16-94
+2.50, -2.27
166-176 (8-10S)
R. Sandy
ZC 2497
10-17-77
+1.27, -5.44
166-175 (6)
R. Sandy
ZC 2826(L)
ZC 2826(R)
09-05-95
+0.32, -5.99
165-175 (13S)
R. Sandy
ZC 2826
03-14-77
+4.97, -6.01
182-187 (1S)
R. Sandy
ZC 2826
10-02-95
+1.60, -6.01
166-177
Japan
ZC 2826
10-19-77
+3.90, -6.00
171-177 (5-6S)
R. Sandy
2826(L)
2826(R)
11-25-76
+6.0, -6.0
166-176 (4S)
R. Sandy
ZC 2892
11-14-99
-5.41, -0.75
175-182 (4.1S)
R. Sandy
ZC 3093
04-22-76
+6.84, -6.08
359-353 (5N)
R. Sandy
ZC 3177
12-23-98
-6.57, +0.34
174-182 (+3.8S)
R. Sandy
ZC 3181
08-17-89
unknown
158-164 (5E)
J. Schwaenen
ZC 3185
12-01-92
unknown
159-167( S)
T. Campbell
ZC 3186
10-01-90
-6.54, -1.44
157-168 (17S)
R. Sandy
ZC 3187
12-25-76
+6.31, -5.58
169-178 (3S)
R. Sandy
ZC 3206
10-30-98
-7.68, +0.36
174-183 ( )
R. Sandy
ZC 3326
11-22-93
+4.35, -6.25
166-173 (12S)
R. Sandy
ZC 3353(L)
ZC 3353(R)
12-07-97
-2.48, +0.04
172-182 (5.4)
R. Sandy

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