MPEC 1998-S09 : 1998 SG2
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M.P.E.C. 1998-S09 Issued 1998 Sept. 19, 16:44 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html
1998 SG2
Observations:
J98S02G C1998 08 17.36460 23 22 29.30 -03 40 59.8 19.2 704
J98S02G C1998 08 17.38570 23 22 31.30 -03 40 55.7 19.4 704
J98S02G C1998 08 17.40684 23 22 33.11 -03 40 53.8 19.6 704
J98S02G C1998 08 17.42784 23 22 35.04 -03 40 52.0 19.2 704
J98S02G C1998 08 17.44871 23 22 36.90 -03 40 47.8 19.3 704
J98S02G C1998 08 23.40447 23 32 29.59 -03 31 33.0 18.8 704
J98S02G C1998 08 23.41673 23 32 30.70 -03 31 29.7 18.8 704
J98S02G C1998 08 23.42969 23 32 32.01 -03 31 29.9 19.1 704
J98S02G C1998 08 23.44274 23 32 33.21 -03 31 30.2 19.2 704
J98S02G C1998 08 23.45503 23 32 34.10 -03 31 30.4 19.2 704
J98S02G C1998 09 14.35696 00 11 46.55 -03 50 40.4 18.1 704
J98S02G C1998 09 14.37914 00 11 48.78 -03 50 43.7 704
J98S02G C1998 09 14.40114 00 11 51.00 -03 50 46.2 18.4 704
J98S02G* C1998 09 17.28687 00 17 19.45 -03 56 27.6 17.3 R 699
J98S02G C1998 09 17.31171 00 17 21.95 -03 56 30.7 699
J98S02G C1998 09 17.33583 00 17 24.38 -03 56 33.2 699
J98S02G C1998 09 18.14727 00 18 58.20 -03 58 09.6 734
J98S02G C1998 09 18.15611 00 18 59.16 -03 58 10.1 734
J98S02G C1998 09 18.16269 00 18 59.85 -03 58 10.7 734
J98S02G C1998 09 18.37464 00 19 21.74 -03 58 31.7 17.6 704
J98S02G C1998 09 18.38742 00 19 22.99 -03 58 33.0 704
J98S02G C1998 09 18.40081 00 19 24.41 -03 58 34.6 704
J98S02G C1998 09 18.41446 00 19 25.79 -03 58 34.7 704
J98S02G C1998 09 18.42801 00 19 27.21 -03 58 36.7 704
J98S02G C1998 09 18.58015 00 19 46.73 -03 58 14.5 16.6 R 426
J98S02G C1998 09 18.58387 00 19 47.12 -03 58 14.8 16.8 R 426
J98S02G C1998 09 18.59032 00 19 47.75 -03 58 15.6 16.7 R 426
J98S02G C1998 09 18.59593 00 19 48.31 -03 58 16.0 16.6 R 426
J98S02G C1998 09 18.60248 00 19 48.96 -03 58 17.1 16.6 R 426
J98S02G C1998 09 18.86582 00 20 19.62 -03 59 34.8 108
J98S02G C1998 09 18.87069 00 20 20.38 -03 59 32.6 17.3 V 108
J98S02G C1998 09 18.92353 00 20 25.53 -03 59 40.7 557
J98S02G SC1998 09 18.92584 00 20 25.74 -03 59 40.2 557
J98S02G C1998 09 18.96042 00 20 29.54 -03 59 45.1 16.9 R 611
J98S02G C1998 09 18.96319 00 20 29.80 -03 59 45.6 17.0 R 611
J98S02G C1998 09 18.96760 00 20 30.19 -03 59 43.0 17.7 R 468
J98S02G C1998 09 18.96806 00 20 30.34 -03 59 46.4 17.2 R 611
J98S02G C1998 09 18.97480 00 20 30.92 -03 59 43.7 17.8 R 468
J98S02G C1998 09 18.98043 00 20 31.48 -03 59 44.3 18.1 R 468
J98S02G C1998 09 19.12177 00 20 48.68 -04 00 00.7 17.2 R 816
J98S02G C1998 09 19.12589 00 20 49.11 -04 00 01.1 17.3 R 816
J98S02G C1998 09 19.13013 00 20 49.56 -04 00 01.8 17.0 R 816
J98S02G C1998 09 19.36701 00 21 15.28 -04 00 23.6 670
J98S02G C1998 09 19.38021 00 21 16.55 -04 00 23.9 18.2 V 670
J98S02G C1998 09 19.56785 00 21 39.32 -04 00 44.4 18.0 V 402
J98S02G C1998 09 19.56924 00 21 39.46 -04 00 44.7 402
J98S02G C1998 09 19.57063 00 21 39.60 -04 00 44.7 402
J98S02G C1998 09 19.57201 00 21 39.75 -04 00 45.0 402
J98S02G C1998 09 19.58620 00 21 41.18 -04 00 04.8 16.5 R 426
J98S02G C1998 09 19.59222 00 21 41.80 -04 00 05.4 16.5 R 426
J98S02G C1998 09 19.59838 00 21 42.41 -04 00 06.1 16.4 R 426
Observer details:
108 Montelupo. Observers M. Tombelli, D. Guidetti, G. Forti, E. Masotti.
0.30-m f/5.7 Schmidt-Cassegrain + CCD.
402 Dynic Astronomical Observatory. Observer A. Sugie. 0.60-m f/3.7 reflector
+ CCD.
426 Woomera. Observer F. B. Zoltowski. 0.30-m f/3.3 Schmidt-Cassegrain + CCD.
468 Campo Catino. Observers G. Masi, F. Mallia. 0.80-m f/4.0 reflector + CCD.
557 Ondrejov. Observer P. Pravec. 0.65-m f/3.6 reflector + CCD.
611 Starkenburg. Observers M. Busch, R. Stoss. 0.45-m f/4.4 reflector + CCD.
670 Camarillo. Observer J. E. Rogers. 0.25-m Schmidt-Cassegrain + CCD.
699 Lowell Observatory-LONEOS. Observer B. A. Skiff. Measurer B. W. Koehn.
0.59-m LONEOS Schmidt + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m f/2.15
reflector + CCD.
734 Farpoint Observatory. Observer G. Hug. 0.30-m Schmidt-Cassegrain + CCD.
816 Rand Observatory. Observer G. R. Viscome. 0.37-m f/6 reflector + CCD.
Orbital elements:
1998 SG2
Epoch 1998 July 6.0 TT = JDT 2451000.5 Williams
M 333.13871 (2000.0) P Q
n 0.29272723 Peri. 219.55378 +0.97782295 -0.20845711
a 2.2464356 Node 152.45824 +0.20151309 +0.91019032
e 0.4587881 Incl. 2.50339 +0.05705038 +0.35790951
P 3.37 H 19.5 G 0.15 U 7
From 48 observations 1998 Aug. 17-Sept. 19, mean residual 0".55.
Ephemeris:
1998 SG2 a,e,i = 2.25, 0.46, 3 q = 1.2158
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 09 14 00 11.11 -03 49.6 0.235 1.237 169.0 8.9 17.4
1998 09 19 00 20.56 -03 59.3 0.226 1.229 170.8 7.5 17.3
1998 09 24 00 30.06 -04 07.2 0.221 1.222 171.9 6.7 17.2
1998 09 29 00 39.55 -04 10.9 0.218 1.218 172.0 6.5 17.1
1998 10 04 00 48.92 -04 08.2 0.218 1.216 171.3 7.1 17.1
1998 10 09 00 58.05 -03 57.8 0.220 1.216 169.9 8.3 17.2
1998 10 14 01 06.84 -03 38.7 0.225 1.219 168.2 9.7 17.3
1998 10 19 01 15.21 -03 10.5 0.233 1.224 166.2 11.2 17.5
1998 10 24 01 23.21 -02 33.3 0.244 1.231 164.0 12.9 17.6
1998 10 29 01 30.87 -01 47.7 0.257 1.240 161.7 14.6 17.8
1998 11 03 01 38.27 -00 54.9 0.273 1.251 159.3 16.2 18.0
1998 11 08 01 45.44 +00 03.6 0.292 1.265 156.9 17.9 18.3
1998 11 13 01 52.43 +01 06.5 0.314 1.280 154.3 19.6 18.5
1998 11 18 01 59.34 +02 12.6 0.339 1.297 151.6 21.2 18.8
1998 11 23 02 06.26 +03 20.7 0.367 1.315 148.9 22.8 19.0
1998 11 28 02 13.25 +04 29.8 0.398 1.335 146.1 24.3 19.3
1998 12 03 02 20.37 +05 39.2 0.432 1.357 143.3 25.7 19.5
1998 12 08 02 27.62 +06 48.0 0.469 1.379 140.5 27.0 19.8
1998 12 13 02 35.03 +07 55.5 0.509 1.403 137.7 28.2 20.0
1998 12 18 02 42.62 +09 01.6 0.552 1.428 134.8 29.3 20.3
1998 12 23 02 50.42 +10 05.8 0.598 1.453 132.0 30.2 20.5
1998 12 28 02 58.43 +11 07.9 0.647 1.480 129.2 31.0 20.7
1999 01 02 03 06.64 +12 07.7 0.699 1.507 126.3 31.7 21.0
1999 01 07 03 15.04 +13 04.9 0.754 1.534 123.5 32.3 21.2
1999 01 12 03 23.62 +13 59.5 0.812 1.562 120.7 32.8 21.4
1999 01 17 03 32.37 +14 51.4 0.872 1.591 117.9 33.1 21.6
1999 01 22 03 41.30 +15 40.6 0.935 1.620 115.1 33.4 21.8
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-S09
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