From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Comets daily 1992 Oct. 05 - 12.
Reply-To: j.jahn@abbs.hanse.de
Date: 27 Sep 92 11:59:00 MET
Distribution: sci
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Daily comet ephemerides for the period: Monday, 1992 Oct. 05 - 12, 0 h UT
(Universal Time). Due to e-mail problems the posting of the five different
ephemerides has to be made on three days. All known comets are included in the
list which meet the following criteria: the minimum elongation to the sun has
to exceeds 15 degrees, the minimum distance to the earth has to be lower than
0.15 astronomical units (A.U.) and the limiting magnitude of the comet is
brighter than 15.5 mag.

Please note, that magnitude predictions for comets tend to be very inaccurate,
thus comets may actually be fainter or brighter than given! Also remember that
comets are diffuse objects. Thus, a comet with a magnitude of 12 mag may be
only observable if the faintest stars visible in your telescope are 14 mag or
fainter. Try first low power for very diffuse comets and than switch to high
powers for more condensated ones. Comet filter may increase comet visibility in
many but not in all cases.

The position are given for 1950.0 and 2000.0. The elements of the orbits are
from the latest MPC or from a more recent IAUC. A list of the used elements is
given at the end of the ephemerides.

Note: The magnitude of comet P/Ciffreo is very uncertain. Please try it
      with a great telescope and mail me your result!

Name of the comet     Rect(1950)Decl Rect(2000)Decl  r    d   Elo Magn MotioPos
[P/] Name [Pro/Fin]    h   m    o  '  h   m    o  ' A.U. A.U.  o  Step  "/h  o
----------------------------- Monday, 1992 Oct. 05 ----------------------------
Shoemaker-Lev (1991d) 19:49.9 + 9:49 19:52.3 + 9:57 3.76 3.34 107 13.7 45.2/168
Helin-Lawrenc (1991l)  0:14.0 +16:08  0:16.6 +16:25 3.57 2.59 166 13.4 64.5/269
Zanotta-Brew (1991g1) 14:20.3 -34:18 14:23.3 -34:31 3.79 4.54  38 14.6 39.7/ 94
Tanaka-Machho (1992d)  9:37.7 +34:06  9:40.7 +33:52 2.63 3.01  58 10.7 23.6/147
Brewington (1992p)     8:38.7 +34:47  8:41.9 +34:37 2.20 2.35  69 11.8 58.9/101
Machholz (1992k)       9:23.7 -28:33  9:25.9 -28:46 1.70 2.11  53 12.9 95.5/141
Shoemaker-Le (1991a1) 12:17.8 -31:38 12:20.4 -31:55 1.52 2.33  28 11.0 60.2/169
P/Schuster (1992n)     6:58.8 +28:54  7:02.0 +28:49 1.57 1.24  89 13.4 92.3/ 67
P/Giclas (1992l)       4:19.7 + 9:18  4:22.5 + 9:25 1.86 1.09 126 13.7 23.8/ 96
P/Ciffreo (1992s)     23:35.5 -24:44 23:38.1 -24:28 2.00 1.09 147 14.7 30.3/291
Helin-Lawrenc (1992q)  1:16.7 -34:27  1:19.0 -34:11 2.78 1.93 140 14.4  109/214
P/Ashbrook-Ja (1992j) 16:49.3 -33:53 16:52.5 -33:58 2.98 3.27  64 14.7 44.2/ 88
---------------------------- Tuesday, 1992 Oct. 06 ----------------------------
Shoemaker-Lev (1991d) 19:50.2 + 9:31 19:52.6 + 9:39 3.77 3.36 107 13.8 44.8/167
Helin-Lawrenc (1991l)  0:12.2 +16:08  0:14.8 +16:24 3.58 2.60 166 13.4 63.9/268
Zanotta-Brew (1991g1) 14:21.6 -34:19 14:24.6 -34:32 3.80 4.56  37 14.6 40.4/ 94
Tanaka-Machho (1992d)  9:38.1 +33:58  9:41.1 +33:44 2.64 3.01  59 10.7 23.0/148
Brewington (1992p)     8:40.6 +34:43  8:43.8 +34:32 2.21 2.34  70 11.8 58.1/101
Machholz (1992k)       9:25.5 -29:02  9:27.7 -29:16 1.72 2.12  53 13.0 94.4/141
Shoemaker-Le (1991a1) 12:18.0 -32:04 12:20.6 -32:20 1.54 2.35  28 11.0 60.0/169
P/Schuster (1992n)     7:01.4 +29:08  7:04.5 +29:04 1.57 1.23  89 13.4 91.8/ 67
P/Giclas (1992l)       4:20.4 + 9:17  4:23.1 + 9:24 1.86 1.08 127 13.7 22.4/ 96
P/Ciffreo (1992s)     23:34.6 -24:40 23:37.2 -24:23 2.00 1.09 146 14.7 30.1/293
Helin-Lawrenc (1992q)  1:14.7 -35:02  1:17.0 -34:47 2.77 1.93 139 14.4  109/215
P/Ashbrook-Ja (1992j) 16:50.7 -33:53 16:54.0 -33:57 2.98 3.28  64 14.7 44.6/ 88
--------------------------- Wednesday, 1992 Oct. 07 ---------------------------
Shoemaker-Lev (1991d) 19:50.4 + 9:14 19:52.8 + 9:22 3.78 3.38 106 13.8 44.3/167
Helin-Lawrenc (1991l)  0:10.4 +16:07  0:13.0 +16:24 3.59 2.61 166 13.4 63.3/268
Zanotta-Brew (1991g1) 14:22.8 -34:20 14:25.9 -34:34 3.82 4.58  36 14.6 40.4/ 94
Tanaka-Machho (1992d)  9:38.5 +33:50  9:41.5 +33:36 2.65 3.01  60 10.7 22.4/148
Brewington (1992p)     8:42.4 +34:39  8:45.6 +34:28 2.21 2.34  70 11.8 57.4/101
Machholz (1992k)       9:27.3 -29:32  9:29.5 -29:45 1.73 2.13  53 13.0 93.3/142
Shoemaker-Le (1991a1) 12:18.2 -32:28 12:20.8 -32:45 1.55 2.36  28 11.1 59.8/170
P/Schuster (1992n)     7:04.0 +29:23  7:07.1 +29:18 1.57 1.23  89 13.4 91.2/ 67
P/Giclas (1992l)       4:20.9 + 9:16  4:23.7 + 9:23 1.86 1.07 127 13.7 21.1/ 97
P/Ciffreo (1992s)     23:33.8 -24:35 23:36.4 -24:18 1.99 1.09 145 14.7 29.9/295
Helin-Lawrenc (1992q)  1:12.6 -35:38  1:14.9 -35:22 2.76 1.93 139 14.3  108/215
P/Ashbrook-Ja (1992j) 16:52.1 -33:52 16:55.4 -33:57 2.97 3.29  63 14.7 45.1/ 88
---------------------------- Thursday, 1992 Oct. 08 ---------------------------
Shoemaker-Lev (1991d) 19:50.7 + 8:57 19:53.1 + 9:05 3.78 3.40 105 13.8 43.9/166
Helin-Lawrenc (1991l)  0:08.7 +16:06  0:11.3 +16:23 3.60 2.62 165 13.4 62.4/268
Zanotta-Brew (1991g1) 14:24.1 -34:21 14:27.1 -34:35 3.83 4.59  36 14.6 38.3/ 95
Tanaka-Machho (1992d)  9:38.8 +33:42  9:41.8 +33:29 2.66 3.01  60 10.7 21.8/149
Brewington (1992p)     8:44.3 +34:35  8:47.4 +34:24 2.22 2.34  71 11.8 56.6/101
Machholz (1992k)       9:29.1 -30:01  9:31.3 -30:14 1.74 2.14  54 13.1 92.2/142
Shoemaker-Le (1991a1) 12:18.4 -32:53 12:21.0 -33:10 1.56 2.37  28 11.1 59.6/170
P/Schuster (1992n)     7:06.5 +29:37  7:09.7 +29:33 1.58 1.22  90 13.4 90.6/ 66
P/Giclas (1992l)       4:21.5 + 9:15  4:24.2 + 9:22 1.86 1.07 128 13.7 19.8/ 97
P/Ciffreo (1992s)     23:33.0 -24:30 23:35.7 -24:13 1.99 1.09 144 14.7 29.7/298
Helin-Lawrenc (1992q)  1:10.6 -36:13  1:12.9 -35:57 2.75 1.93 138 14.3  108/216
P/Ashbrook-Ja (1992j) 16:53.6 -33:52 16:56.9 -33:56 2.97 3.30  62 14.7 45.5/ 88
----------------------------- Friday, 1992 Oct. 09 ----------------------------
Shoemaker-Lev (1991d) 19:51.0 + 8:40 19:53.4 + 8:48 3.79 3.42 104 13.8 43.4/165
Helin-Lawrenc (1991l)  0:07.0 +16:05  0:09.6 +16:22 3.61 2.63 164 13.4 61.7/268
Zanotta-Brew (1991g1) 14:25.4 -34:23 14:28.4 -34:36 3.84 4.61  35 14.6 40.6/ 94
Tanaka-Machho (1992d)  9:39.2 +33:35  9:42.2 +33:21 2.67 3.00  61 10.7 21.3/150
Brewington (1992p)     8:46.1 +34:31  8:49.2 +34:19 2.23 2.33  72 11.8 55.8/101
Machholz (1992k)       9:30.9 -30:29  9:33.0 -30:43 1.76 2.15  54 13.1 91.2/142
Shoemaker-Le (1991a1) 12:18.5 -33:18 12:21.1 -33:35 1.58 2.38  29 11.1 75.4/189
P/Schuster (1992n)     7:09.0 +29:52  7:12.2 +29:47 1.58 1.22  90 13.4 89.9/ 66
P/Giclas (1992l)       4:22.0 + 9:14  4:24.7 + 9:21 1.86 1.06 129 13.7 18.4/ 98
P/Ciffreo (1992s)     23:32.3 -24:24 23:34.9 -24:07 1.98 1.09 143 14.6 29.5/300
Helin-Lawrenc (1992q)  1:08.4 -36:48  1:10.8 -36:32 2.75 1.93 137 14.3  107/217
P/Ashbrook-Ja (1992j) 16:55.0 -33:51 16:58.3 -33:56 2.96 3.31  62 14.7 45.9/ 88
---------------------------- Saturday, 1992 Oct. 10 ---------------------------
Shoemaker-Lev (1991d) 19:51.3 + 8:23 19:53.7 + 8:31 3.80 3.44 104 13.9 43.1/164
Helin-Lawrenc (1991l)  0:05.3 +16:04  0:07.9 +16:20 3.62 2.65 163 13.4 60.9/267
Zanotta-Brew (1991g1) 14:26.6 -34:24 14:29.6 -34:37 3.85 4.63  34 14.6 40.4/ 94
Tanaka-Machho (1992d)  9:39.5 +33:28  9:42.5 +33:14 2.68 3.00  62 10.7 20.7/151
Brewington (1992p)     8:47.8 +34:26  8:50.9 +34:15 2.24 2.33  72 11.8 55.0/101
Machholz (1992k)       9:32.6 -30:58  9:34.8 -31:11 1.77 2.16  54 13.1 90.1/142
Shoemaker-Le (1991a1) 12:18.8 -33:43 12:21.4 -33:59 1.59 2.39  29 11.1 59.4/170
P/Schuster (1992n)     7:11.6 +30:07  7:14.7 +30:02 1.58 1.21  91 13.4 89.3/ 66
P/Giclas (1992l)       4:22.5 + 9:13  4:25.2 + 9:19 1.86 1.06 130 13.7 17.1/ 99
P/Ciffreo (1992s)     23:31.5 -24:18 23:34.2 -24:01 1.98 1.09 142 14.6 29.4/302
Helin-Lawrenc (1992q)  1:06.3 -37:22  1:08.6 -37:06 2.74 1.93 136 14.3  106/217
P/Ashbrook-Ja (1992j) 16:56.5 -33:51 16:59.8 -33:55 2.96 3.32  61 14.7 46.3/ 88
----------------------------- Sunday, 1992 Oct. 11 ----------------------------
Shoemaker-Lev (1991d) 19:51.6 + 8:07 19:54.1 + 8:14 3.81 3.46 103 13.9 42.7/163
Helin-Lawrenc (1991l)  0:03.6 +16:03  0:06.2 +16:19 3.63 2.66 163 13.4 59.9/267
Zanotta-Brew (1991g1) 14:27.9 -34:25 14:30.9 -34:39 3.86 4.65  34 14.6 37.4/ 96
Tanaka-Machho (1992d)  9:39.8 +33:21  9:42.8 +33:07 2.69 3.00  63 10.7 20.1/152
Brewington (1992p)     8:49.5 +34:22  8:52.7 +34:11 2.24 2.33  73 11.8 54.2/101
Machholz (1992k)       9:34.3 -31:26  9:36.5 -31:40 1.78 2.16  55 13.2 89.1/142
Shoemaker-Le (1991a1) 12:18.9 -34:07 12:21.5 -34:24 1.60 2.40  29 11.2 59.2/170
P/Schuster (1992n)     7:14.1 +30:21  7:17.2 +30:16 1.58 1.21  91 13.4 88.7/ 66
P/Giclas (1992l)       4:22.9 + 9:12  4:25.6 + 9:18 1.86 1.05 131 13.7 15.7/100
P/Ciffreo (1992s)     23:30.8 -24:11 23:33.5 -23:55 1.97 1.09 142 14.6 29.2/305
Helin-Lawrenc (1992q)  1:04.1 -37:55  1:06.5 -37:39 2.73 1.93 135 14.3  105/218
P/Ashbrook-Ja (1992j) 16:58.0 -33:50 17:01.3 -33:54 2.96 3.32  60 14.7 46.7/ 88
----------------------------- Monday, 1992 Oct. 12 ----------------------------
Shoemaker-Lev (1991d) 19:52.0 + 7:50 19:54.4 + 7:58 3.82 3.48 102 13.9 42.4/162
Helin-Lawrenc (1991l)  0:02.0 +16:01  0:04.5 +16:18 3.64 2.67 162 13.4 59.1/267
Zanotta-Brew (1991g1) 14:29.1 -34:27 14:32.1 -34:40 3.87 4.67  33 14.7 39.4/ 95
Tanaka-Machho (1992d)  9:40.1 +33:13  9:43.1 +32:60 2.70 2.99  64 10.7 19.6/154
Brewington (1992p)     8:51.3 +34:18  8:54.4 +34:07 2.25 2.33  73 11.9 53.4/101
Machholz (1992k)       9:36.0 -31:54  9:38.2 -32:08 1.80 2.17  55 13.2 88.1/143
Shoemaker-Le (1991a1) 12:19.1 -34:31 12:21.8 -34:48 1.61 2.41  30 11.2 59.0/170
P/Schuster (1992n)     7:16.5 +30:36  7:19.7 +30:31 1.58 1.20  92 13.4 88.0/ 66
P/Giclas (1992l)       4:23.3 + 9:11  4:26.0 + 9:17 1.86 1.05 132 13.7 14.3/100
P/Ciffreo (1992s)     23:30.1 -24:05 23:32.8 -23:48 1.97 1.09 141 14.6 29.1/308
Helin-Lawrenc (1992q)  1:01.9 -38:28  1:04.3 -38:12 2.73 1.93 134 14.3  105/219
P/Ashbrook-Ja (1992j) 16:59.5 -33:50 17:02.8 -33:54 2.95 3.33  60 14.7 47.1/ 88


Used orbital elements (2000.0).
Name of comet     Perihel. T   Perih.q Eccentr Perihel   Node   Inclin   H    G
[P/] Name [Pr/Fi] Ye Mo Day      A.U.      e   Degrees Degrees Degrees Magn   -
-------------------------------------------------------------------------------
Shoemaker (1991d) 91 12 31.181 2.26503 0.99350  74.365 145.130  77.288  4.8 4.4
Helin-Law (1991l) 92 01 20.027 1.51772 1.00044 271.159  11.835  95.456 11.3 0.0
Zanotta- (1991g1) 92 01 31.992 0.64397 1.00006 197.873 254.907  50.029  9.1 1.5
Tanaka-Ma (1992d) 92 04 22.688 1.26143 0.99551  65.473 300.508  79.295  6.5 1.7
Brewingto (1992p) 92 06 24.872 1.78190 1.00000  57.431 347.503  17.880  6.5 4.0
Machholz (1992k)  92 07 10.958 0.81977 1.00000 162.918 235.132  57.705  9.0 4.0
Shoemake (1991a1) 92 07 24.507 0.83625 0.99986 145.240  49.051 113.498  8.3 1.9
P/Schuste (1992n) 92 09 06.422 1.53924 0.58952 355.733  50.602  20.134 10.0 6.0
P/Giclas (1992l)  92 09 13.092 1.84679 0.49321 276.486 112.526   7.284  9.5 6.0
P/Swift (1862III) 92 11 25.850 0.95820 0.96330 153.050 139.440 113.440 14.0 4.0
P/Ciffreo (1992s) 93 01 23.065 1.70877 0.54317 358.033  53.709  13.089 10.0 6.0
Helin-Law (1992q) 93 03 11.131 2.09993 1.00000 266.293 194.882 107.139  8.5 4.0
P/Ashbroo (1992j) 93 07 14.052 2.31628 0.39491 348.690   2.666  12.501  5.0 6.0

The name is the same as in the ephemerides, but a littlebit shorter. 'Perihel.
T' is the perihelion date as year, month and day. 'Perih.q' is the perihelion
distance q in astronomical units. 'Eccentr e' is the eccentricity of the orbit.
'Perihel', 'Node' and 'Inclin.' are these three orbit angles in degrees. H is
the magnitude of the object in 1 A.U. from the sun and the earth, G is the
factor in the calculation of the objects brightness V = H + 5*log(d) +
2.5*G*log(r). These orbital element list is only for an overview, which orbit I
used. For well-known objects the accuracy of the published original elements
may be some digits better than given here.


Explanations of the columns in the ephemerides:
Name of object    The name of the object. A [P/] before the name of the object
                  means a periodic comet with a period around the sun of lower
                  than 200 years. If the comet have received a final [Fin]
                  designation, it's the name of the year with a roman number in
                  bracketts. If it's a provisional designation [Pro] the number
                  of the year is following by a lower letter, also in
                  bracketts. For more than 26 comets in a year, a running
                  number is in the appendix.
Rect(1950)Decl    The rectascension in hours and time minutes and the
                  declination in degrees and arc minutes for 1950.0.
Rect(2000)Decl    The rectascension in hours and time minutes and the
                  declination in degrees and arc minutes for 2000.0.
r                 The distance of the comet to the sun in A.U.
d                 The distance of the comet to the earth in A.U.
Elo               The elongation of the comet to the sun in degrees.
Magn              The magnitude of the comet in magnitude steps.
MotioPos          The motion of the comet in arc seconds/hour and the position
                  angle of the motion (from north, over east, south and west
                  back to north, 0..360 degrees).

These ephemerides should promote the observing of comets.

These ephemerides were computed by a program of Jost Jahn with an Atari ST
computer.

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