Based on 2 oppositions! (8-day arc this opposition).
1998 SH4 a,e,i = 3.19, 0.12, 2 Elements E1998-S43
Topocentric ephemeris for observatory code 735
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 10 02.15 23 20 44.03 -06 14 41.9 2.3216 3.2788 159.7 6.1 18.4
1998 10 03.15 23 20 08.18 -06 18 39.2 2.3281 3.2799 158.5 6.4 18.4
1998 10 04.15 23 19 33.08 -06 22 30.7 2.3348 3.2809 157.4 6.7 18.4
1998 10 05.15 23 18 58.76 -06 26 16.2 2.3418 3.2820 156.3 7.0 18.4
1998 10 06.15 23 18 25.24 -06 29 55.5 2.3490 3.2831 155.1 7.4 18.5
1998 10 07.15 23 17 52.54 -06 33 28.6 2.3565 3.2842 154.0 7.7 18.5
1998 10 08.15 23 17 20.70 -06 36 55.1 2.3642 3.2853 152.9 8.0 18.5
1998 10 09.15 23 16 49.74 -06 40 15.2 2.3722 3.2864 151.7 8.3 18.5
1998 10 10.15 23 16 19.69 -06 43 28.5 2.3805 3.2874 150.6 8.6 18.6
1998 10 11.15 23 15 50.56 -06 46 34.9 2.3890 3.2885 149.5 8.9 18.6
1998 10 12.15 23 15 22.39 -06 49 34.5 2.3977 3.2896 148.4 9.2 18.6
1998 10 13.15 23 14 55.20 -06 52 26.9 2.4066 3.2907 147.3 9.4 18.6
1998 10 14.15 23 14 29.00 -06 55 12.2 2.4158 3.2917 146.2 9.7 18.6
1998 10 15.15 23 14 03.82 -06 57 50.2 2.4253 3.2928 145.1 10.0 18.7
1998 10 16.15 23 13 39.68 -07 00 20.8 2.4349 3.2939 144.0 10.3 18.7
1998 10 17.15 23 13 16.59 -07 02 43.9 2.4448 3.2950 142.9 10.5 18.7
1998 10 18.15 23 12 54.59 -07 04 59.6 2.4549 3.2960 141.8 10.8 18.7
1998 10 19.15 23 12 33.67 -07 07 07.6 2.4652 3.2971 140.7 11.0 18.7
1998 10 20.15 23 12 13.86 -07 09 08.0 2.4758 3.2982 139.6 11.3 18.8
1998 10 21.15 23 11 55.17 -07 11 00.6 2.4865 3.2992 138.6 11.5 18.8
1998 10 22.15 23 11 37.61 -07 12 45.5 2.4974 3.3003 137.5 11.8 18.8
Based on 4-day arc
1998 SH4 a,e,i = 3.20, 0.10, 2 Elements E1998-S25
Topocentric ephemeris for observatory code 735
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 09 26.2 23 24 31.01 -05 49 19.4 2.2387 3.2222 166.5 4.2 18.7
1998 09 27.2 23 23 51.43 -05 53 47.2 2.2434 3.2232 165.4 4.5 18.7
1998 09 28.2 23 23 12.40 -05 58 10.3 2.2483 3.2242 164.2 4.9 18.7
1998 09 29.2 23 22 33.96 -06 02 28.4 2.2536 3.2252 163.1 5.2 18.7
1998 09 30.2 23 21 56.15 -06 06 41.4 2.2591 3.2262 161.9 5.5 18.8
1998 10 01.2 23 21 19.00 -06 10 49.1 2.2649 3.2272 160.8 5.9 18.8
1998 10 02.2 23 20 42.54 -06 14 51.1 2.2710 3.2281 159.6 6.2 18.8
1998 10 03.2 23 20 06.82 -06 18 47.5 2.2773 3.2291 158.5 6.5 18.8
1998 10 04.2 23 19 31.86 -06 22 37.9 2.2839 3.2301 157.3 6.9 18.9
1998 10 05.2 23 18 57.68 -06 26 22.2 2.2907 3.2311 156.2 7.2 18.9
1998 10 06.2 23 18 24.32 -06 30 00.2 2.2978 3.2321 155.1 7.5 18.9
1998 10 07.2 23 17 51.81 -06 33 31.9 2.3052 3.2331 153.9 7.8 18.9
1998 10 08.2 23 17 20.16 -06 36 57.0 2.3128 3.2341 152.8 8.1 18.9
1998 10 09.2 23 16 49.41 -06 40 15.4 2.3207 3.2351 151.7 8.4 19.0
1998 10 10.2 23 16 19.58 -06 43 27.0 2.3288 3.2360 150.6 8.7 19.0
1998 10 11.2 23 15 50.70 -06 46 31.7 2.3371 3.2370 149.5 9.0 19.0
1998 10 12.2 23 15 22.78 -06 49 29.2 2.3457 3.2380 148.3 9.3 19.0
1998 10 13.2 23 14 55.86 -06 52 19.6 2.3546 3.2390 147.2 9.6 19.0
1998 10 14.2 23 14 29.95 -06 55 02.8 2.3636 3.2400 146.1 9.9 19.1
1998 10 15.2 23 14 05.08 -06 57 38.5 2.3729 3.2410 145.0 10.2 19.1
1998 10 16.2 23 13 41.26 -07 00 06.7 2.3824 3.2419 143.9 10.4 19.1
Based two nights. Predictions still holding at D-day +5. New
astrometry has been submitted.
1998 SH4 From Vaisala eleme
Topocentric ephemeris for observatory code 735
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 09 23.15 23 26 34.69 -05 35 14.2 2.0063 2.9997 170.0 3.3 18.7
1998 09 24.15 23 25 53.62 -05 39 54.1 2.0091 2.9997 168.9 3.7 18.7
1998 09 25.15 23 25 12.98 -05 44 30.0 2.0121 2.9997 167.7 4.1 18.8
1998 09 26.15 23 24 32.82 -05 49 01.6 2.0154 2.9997 166.6 4.5 18.8
1998 09 27.15 23 23 53.18 -05 53 28.5 2.0190 2.9998 165.4 4.8 18.8
1998 09 28.15 23 23 14.11 -05 57 50.6 2.0229 2.9998 164.3 5.2 18.8
1998 09 29.15 23 22 35.64 -06 02 07.6 2.0270 2.9998 163.1 5.6 18.9
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