From: j.jahn@abbs.hanse.de (Jost Jahn)
Newsgroups: sci.astro
Subject: Comets daily 1993 Jan. 18 - 25.
Reply-To: j.jahn@abbs.hanse.de
Date: 01 Jan 93 18:30:00 MET
Distribution: world
Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
X-Version: ZerUU V6.45c

Message-Id:   <25913034656@amterm1.abbs.hanse.de>
Daily comet ephemerides for the period: Monday, 1993 Jan. 18 - 25, 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.

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, 1993 Jan. 18 ----------------------------
Helin-Lawrenc (1991l) 23:20.0 +16:26 23:22.5 +16:42 4.57 4.95  62 14.8 16.3/ 55
Tanaka-Machho (1992d)  8:12.7 +27:23  8:15.8 +27:14 3.73 2.76 172 12.4 55.6/258
P/Brewington (1992p)   9:10.5 +34:23  9:13.5 +34:11 2.77 1.83 159 12.2 38.3/272
Shoemaker-Le (1991a1)  9:27.3 -70:19  9:27.9 -70:32 2.87 2.74  88 12.9 87.4/270
P/Schuster (1992n)     8:15.4 +54:43  8:19.3 +54:33 2.05 1.16 146 15.0 31.6/283
P/Giclas (1992l)       3:59.3 +15:15  4:02.1 +15:23 2.15 1.44 123 15.3 28.5/ 48
Ohshita (1992a1)      18:36   +76:36 18:34   +76:39 1.59 1.12  98 14.8  177/ 70
P/Ciffreo (1992s)      0:54.3 + 4:36  0:56.9 + 4:52 1.71 1.64  77 14.6 91.1/ 55
P/Howell (1992c)      18:31.5 -24:29 18:34.6 -24:27 1.47 2.35  20 12.4  124/ 89
P/Schaumasse (1992x)   3:29.0 +27:28  3:32.0 +27:38 1.34 0.55 119  9.3 58.3/ 10
P/Forbes              17:42.3 -28:12 17:45.4 -28:13 1.56 2.31  32 13.7  119/ 91
Helin-Lawrenc (1992q) 23:07.9 -53:53 23:10.8 -53:37 2.14 2.66  49 13.9 15.0/114
Shoemaker (1992y)      1:41.4 +45:35  1:44.5 +45:50 2.43 2.03 102 14.4 26.5/315
P/Vaeisaelae 1 (1992u)    9:55.8 +12:08  9:58.5 +11:54 2.05 1.14 150 15.0 21.5/ 12
---------------------------- Tuesday, 1993 Jan. 19 ----------------------------
Helin-Lawrenc (1991l) 23:20.3 +16:30 23:22.8 +16:46 4.58 4.97  61 14.8 16.8/ 53
Tanaka-Machho (1992d)  8:11.1 +27:18  8:14.1 +27:09 3.74 2.76 173 12.4 55.3/258
P/Brewington (1992p)   9:09.2 +34:23  9:12.3 +34:11 2.78 1.83 160 12.3 38.5/271
Shoemaker-Le (1991a1)  9:21.1 -70:20  9:21.7 -70:33 2.88 2.74  88 12.9 74.6/267
P/Schuster (1992n)     8:14.0 +54:45  8:17.9 +54:36 2.06 1.17 146 15.0 31.1/280
P/Giclas (1992l)       3:59.9 +15:22  4:02.7 +15:30 2.15 1.46 123 15.3 29.2/ 49
Ohshita (1992a1)      18:55   +76:56 18:53   +77:00 1.60 1.14  98 14.8  170/ 74
P/Ciffreo (1992s)      0:56.3 + 4:57  0:58.9 + 5:13 1.71 1.65  77 14.6 91.5/ 55
P/Howell (1992c)      18:35.2 -24:28 18:38.2 -24:25 1.47 2.35  20 12.4  124/ 88
P/Schaumasse (1992x)   3:29.3 +27:51  3:32.3 +28:01 1.33 0.55 118  9.3 59.2/ 12
P/Forbes              17:45.9 -28:13 17:49.0 -28:14 1.56 2.31  32 13.7  119/ 91
Helin-Lawrenc (1992q) 23:08.6 -53:55 23:11.4 -53:39 2.14 2.66  49 13.9 15.6/114
Shoemaker (1992y)      1:40.7 +45:42  1:43.8 +45:57 2.43 2.04 101 14.4 25.7/317
P/Vaeisaelae 1 (1992u)    9:55.9 +12:17  9:58.6 +12:03 2.05 1.13 151 14.9 22.1/  9
--------------------------- Wednesday, 1993 Jan. 20 ---------------------------
Helin-Lawrenc (1991l) 23:20.7 +16:34 23:23.2 +16:50 4.59 4.99  60 14.8 16.8/ 56
Tanaka-Machho (1992d)  8:09.5 +27:14  8:12.5 +27:05 3.75 2.77 173 12.4 55.0/258
P/Brewington (1992p)   9:08.0 +34:24  9:11.0 +34:11 2.78 1.84 160 12.3 38.7/271
Shoemaker-Le (1991a1)  9:15.0 -70:21  9:15.5 -70:33 2.89 2.75  89 12.9 74.7/269
P/Schuster (1992n)     8:12.6 +54:47  8:16.5 +54:38 2.06 1.17 145 15.1 30.6/278
P/Giclas (1992l)       4:00.5 +15:30  4:03.4 +15:38 2.16 1.47 122 15.3 29.9/ 50
Ohshita (1992a1)      19:15   +77:11 19:13   +77:16 1.62 1.16  98 14.9  164/ 78
P/Ciffreo (1992s)      0:58.3 + 5:18  1:00.9 + 5:34 1.71 1.65  76 14.6 91.8/ 55
P/Howell (1992c)      18:38.8 -24:26 18:41.9 -24:24 1.46 2.34  21 12.3  125/ 88
P/Schaumasse (1992x)   3:29.7 +28:14  3:32.8 +28:24 1.33 0.54 117  9.2 60.3/ 15
P/Forbes              17:49.5 -28:14 17:52.6 -28:15 1.56 2.30  32 13.7  119/ 91
Helin-Lawrenc (1992q) 23:09.2 -53:58 23:12.1 -53:42 2.14 2.66  48 13.9 16.3/114
Shoemaker (1992y)      1:40.1 +45:50  1:43.1 +46:05 2.43 2.05 100 14.4 25.0/319
P/Vaeisaelae 1 (1992u)    9:56.0 +12:26  9:58.7 +12:12 2.04 1.12 153 14.9 22.7/  7
---------------------------- Thursday, 1993 Jan. 21 ---------------------------
Helin-Lawrenc (1991l) 23:21.1 +16:38 23:23.6 +16:54 4.60 5.02  60 14.8 17.2/ 54
Tanaka-Machho (1992d)  8:07.9 +27:09  8:10.9 +26:60 3.76 2.79 173 12.4 54.6/257
P/Brewington (1992p)   9:06.7 +34:24  9:09.8 +34:11 2.79 1.84 161 12.3 38.8/270
Shoemaker-Le (1991a1)  9:08.9 -70:20  9:09.4 -70:33 2.91 2.75  89 12.9 74.6/271
P/Schuster (1992n)     8:11.2 +54:48  8:15.1 +54:39 2.07 1.18 145 15.1 30.1/276
P/Giclas (1992l)       4:01.2 +15:37  4:04.0 +15:46 2.16 1.48 121 15.4 30.6/ 52
Ohshita (1992a1)      19:34   +77:20 19:32   +77:27 1.63 1.18  98 15.0  158/ 82
P/Ciffreo (1992s)      1:00.3 + 5:39  1:02.9 + 5:55 1.71 1.66  76 14.6 92.3/ 55
P/Howell (1992c)      18:42.4 -24:25 18:45.5 -24:22 1.46 2.34  21 12.3  125/ 87
P/Schaumasse (1992x)   3:30.2 +28:38  3:33.3 +28:48 1.32 0.54 117  9.2 61.4/ 17
P/Forbes              17:53.1 -28:15 17:56.2 -28:15 1.55 2.29  32 13.7  119/ 90
Helin-Lawrenc (1992q) 23:09.9 -54:01 23:12.8 -53:44 2.13 2.66  48 13.9 17.0/114
Shoemaker (1992y)      1:39.5 +45:57  1:42.5 +46:12 2.42 2.06  99 14.4 24.3/322
P/Vaeisaelae 1 (1992u)    9:56.0 +12:35  9:58.7 +12:21 2.04 1.11 154 14.9 23.3/  4
----------------------------- Friday, 1993 Jan. 22 ----------------------------
Helin-Lawrenc (1991l) 23:21.5 +16:42 23:24.0 +16:58 4.61 5.04  59 14.8 17.5/ 55
Tanaka-Machho (1992d)  8:06.3 +27:04  8:09.3 +26:55 3.77 2.80 173 12.4 54.2/257
P/Brewington (1992p)   9:05.5 +34:23  9:08.5 +34:11 2.80 1.85 162 12.3 38.9/269
Shoemaker-Le (1991a1)  9:02.8 -70:19  9:03.2 -70:31 2.92 2.76  89 12.9 74.6/274
P/Schuster (1992n)     8:09.8 +54:49  8:13.7 +54:40 2.07 1.19 145 15.1 29.6/273
P/Giclas (1992l)       4:01.8 +15:45  4:04.7 +15:53 2.16 1.50 120 15.4 31.3/ 53
Ohshita (1992a1)      19:53   +77:25 19:51   +77:33 1.65 1.20  97 15.1  153/ 86
P/Ciffreo (1992s)      1:02.4 + 6:00  1:05.0 + 6:16 1.71 1.67  75 14.6 92.6/ 55
P/Howell (1992c)      18:46.1 -24:23 18:49.2 -24:19 1.46 2.33  21 12.3  125/ 87
P/Schaumasse (1992x)   3:30.8 +29:01  3:33.9 +29:12 1.32 0.54 116  9.1 62.6/ 19
P/Forbes              17:56.7 -28:15 17:59.9 -28:15 1.55 2.29  32 13.6  120/ 90
Helin-Lawrenc (1992q) 23:10.6 -54:04 23:13.5 -53:47 2.13 2.66  48 13.9 17.6/114
Shoemaker (1992y)      1:38.9 +46:05  1:42.0 +46:20 2.42 2.07  98 14.4 23.7/324
P/Vaeisaelae 1 (1992u)    9:56.1 +12:45  9:58.8 +12:30 2.03 1.10 155 14.8 24.0/  2
---------------------------- Saturday, 1993 Jan. 23 ---------------------------
Helin-Lawrenc (1991l) 23:21.9 +16:46 23:24.4 +17:02 4.62 5.06  58 14.8 17.7/ 56
Tanaka-Machho (1992d)  8:04.7 +26:59  8:07.8 +26:50 3.78 2.81 172 12.4 53.7/257
P/Brewington (1992p)   9:04.2 +34:23  9:07.3 +34:11 2.81 1.85 162 12.3 39.0/269
Shoemaker-Le (1991a1)  8:56.8 -70:16  8:57.1 -70:28 2.93 2.76  90 12.9 86.9/280
P/Schuster (1992n)     8:08.5 +54:49  8:12.3 +54:40 2.08 1.20 145 15.2 29.2/271
P/Giclas (1992l)       4:02.5 +15:53  4:05.4 +16:01 2.17 1.51 119 15.4 31.9/ 54
Ohshita (1992a1)      20:11   +77:26 20:10   +77:35 1.66 1.22  97 15.1  147/ 90
P/Ciffreo (1992s)      1:04.4 + 6:21  1:07.0 + 6:37 1.71 1.68  75 14.6 92.9/ 56
P/Howell (1992c)      18:49.8 -24:20 18:52.8 -24:16 1.46 2.33  21 12.3  125/ 87
P/Schaumasse (1992x)   3:31.5 +29:25  3:34.5 +29:35 1.31 0.54 115  9.1 63.9/ 21
P/Forbes              18:00.3 -28:15 18:03.5 -28:15 1.54 2.28  33 13.6  120/ 89
Helin-Lawrenc (1992q) 23:11.4 -54:06 23:14.2 -53:50 2.13 2.66  48 13.9 18.3/114
Shoemaker (1992y)      1:38.4 +46:13  1:41.5 +46:28 2.42 2.08  97 14.4 23.2/327
P/Vaeisaelae 1 (1992u)    9:56.1 +12:54  9:58.8 +12:40 2.03 1.09 156 14.8 24.7/  0
----------------------------- Sunday, 1993 Jan. 24 ----------------------------
Helin-Lawrenc (1991l) 23:22.3 +16:50 23:24.8 +17:07 4.63 5.09  57 14.8 18.1/ 54
Tanaka-Machho (1992d)  8:03.2 +26:54  8:06.2 +26:45 3.79 2.82 171 12.5 53.3/257
P/Brewington (1992p)   9:02.9 +34:23  9:06.0 +34:11 2.81 1.86 163 12.3 39.0/268
Shoemaker-Le (1991a1)  8:50.7 -70:12  8:51.0 -70:23 2.94 2.77  90 13.0 74.5/278
P/Schuster (1992n)     8:07.1 +54:49  8:11.0 +54:40 2.09 1.21 144 15.2 28.7/268
P/Giclas (1992l)       4:03.3 +16:00  4:06.1 +16:08 2.17 1.52 118 15.5 32.6/ 55
Ohshita (1992a1)      20:29   +77:22 20:27   +77:32 1.68 1.25  97 15.2  142/ 94
P/Ciffreo (1992s)      1:06.5 + 6:42  1:09.1 + 6:58 1.71 1.68  74 14.6 93.1/ 56
P/Howell (1992c)      18:53.4 -24:17 18:56.5 -24:13 1.45 2.33  21 12.3  125/ 86
P/Schaumasse (1992x)   3:32.2 +29:49  3:35.3 +29:59 1.31 0.54 114  9.0 65.2/ 23
P/Forbes              18:04.0 -28:15 18:07.1 -28:15 1.54 2.27  33 13.6  120/ 89
Helin-Lawrenc (1992q) 23:12.1 -54:09 23:15.0 -53:53 2.12 2.66  47 13.9 18.9/114
Shoemaker (1992y)      1:37.9 +46:21  1:41.0 +46:36 2.41 2.09  97 14.4 22.7/330
P/Vaeisaelae 1 (1992u)    9:56.1 +13:04  9:58.8 +12:50 2.02 1.08 157 14.8 25.4/358
----------------------------- Monday, 1993 Jan. 25 ----------------------------
Helin-Lawrenc (1991l) 23:22.7 +16:54 23:25.2 +17:11 4.63 5.11  56 14.8 18.3/ 55
Tanaka-Machho (1992d)  8:01.6 +26:49  8:04.7 +26:40 3.80 2.83 170 12.5 52.8/256
P/Brewington (1992p)   9:01.7 +34:22  9:04.8 +34:10 2.82 1.86 163 12.4 39.0/267
Shoemaker-Le (1991a1)  8:44.7 -70:07  8:45.0 -70:18 2.95 2.77  91 13.0 74.3/280
P/Schuster (1992n)     8:05.8 +54:48  8:09.7 +54:40 2.09 1.21 144 15.2 28.2/265
Ohshita (1992a1)      20:46   +77:16 20:45   +77:27 1.69 1.27  96 15.3  137/ 97
P/Ciffreo (1992s)      1:08.5 + 7:03  1:11.1 + 7:19 1.71 1.69  74 14.6 93.4/ 56
P/Howell (1992c)      18:57.1 -24:14 19:00.1 -24:10 1.45 2.32  21 12.3  126/ 86
P/Schaumasse (1992x)   3:33.0 +30:13  3:36.1 +30:23 1.30 0.54 113  9.0 66.6/ 25
P/Forbes              18:07.6 -28:14 18:10.8 -28:14 1.54 2.27  33 13.6  120/ 89
Helin-Lawrenc (1992q) 23:12.9 -54:13 23:15.8 -53:56 2.12 2.66  47 13.9 19.6/114
Shoemaker (1992y)      1:37.5 +46:28  1:40.6 +46:44 2.41 2.10  96 14.4 22.4/333
P/Vaeisaelae 1 (1992u)    9:56.0 +13:15  9:58.7 +13:00 2.02 1.07 158 14.7 26.1/356


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   -
-------------------------------------------------------------------------------
Helin-Law (1991l) 92 01 20.027 1.51772 1.00044 271.159  11.835  95.456 11.3 0.0
Tanaka-Ma (1992d) 92 04 22.688 1.26148 0.99589  65.473 300.508  79.293  6.3 2.7
P/Brewing (1992p) 92 06 07.859 1.60165 0.67150  47.879 343.750  18.057  6.5 4.0
Shoemake (1991a1) 92 07 24.507 0.83625 0.99986 145.240  49.051 113.498  8.4 2.0
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
Ohshita (1992a1)  92 11 01.562 0.66357 0.99054 309.979 138.352 115.114 12.5 4.0
P/Ciffreo (1992s) 93 01 23.065 1.70877 0.54317 358.034  53.709  13.089 10.0 6.0
P/Howell (1992c)  93 02 26.096 1.40914 0.55206 234.757  57.744   4.400  8.0 6.0
P/Schauma (1992x) 93 03 03.961 1.20216 0.70485  57.482  81.053  11.846  7.3  11
P/Forbes          93 03 14.632 1.44684 0.56805 310.537 334.456   7.159  9.0 6.0
Helin-Law (1992q) 93 03 15.122 2.03839 0.96521 268.857 194.666 106.846  8.5 4.0
Shoemaker (1992y) 93 03 25.663 2.31384 1.00000  54.859  55.300  65.994  9.0 4.0
P/Vaeisaelae (1992u) 93 04 29.175 1.78302 0.63471  47.385 135.077  11.596 10.0 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.
 
--
------------------------------------------------------------------------------
ABBS AstroMail, the first and most popular German astronomical bulletin board
------------------------- for amateur astronomers ----------------------------
    + 49 5851 7896 / V.21, V.22, V.22bis, V.32, V.42, V.42bis and MNP5
    ------------------------------------------------------------------


Xref: sparky sci.astro:13397 sci.physics:21705