IAA Minor Planet Database| Epoch (TDB) | 2025-11-21 (JD 2461000.5) |
|---|---|
| Eccentricity (e) | 0.7628889553 ± 5.35e-08 |
| Semi-major axis (a) | 2.1074693877 AU ± 4.30e-09 |
| Inclination (i) | 11.61757357° ± 2.67e-06 |
| Long. of Asc. Node (Ω) | 136.01918391° ± 3.61e-05 |
| Arg. of Perihelion (ω) | 107.91071535° ± 3.53e-05 |
| Mean Anomaly (M) | 210.82873660° ± 4.89e-06 |
| Mean Motion (n) | 0.3221590706°/day ± 9.85e-10 |
| Perihelion dist (q) | 0.49970427 AU ± 1.13e-07 |
| Aphelion dist (Q) | 3.71523451 AU ± 1.13e-07 |
| Orbital Period | 3.05943980 yr ± 9.35e-09 |
| H (abs. magnitude) | 16.40 |
|---|---|
| G (slope) | 0.15 |
1987 SB4
| Source | IAA |
|---|---|
| Solution Date | 2026-05-31 |
| RMS Residual | 0.183″ |
| Uncertainty | 0 |
| Orbit Type | Apollo |
| MOID | 0.033012 AU |
| Observations Used | 242 |
| Oppositions | 26 |
| Arc Total | 1987-2026 |
| First Observation Used | 1987-09-28 |
| Last Observation Used | 2026-01-11 |
| Date | Type | RA | Dec | Mag | Band | Observatory |
|---|---|---|---|---|---|---|
| 2021-11-01 11:44:50 | C | 03 12 28.971 | +00 17 40.10 | – | U | F52 |
| 2021-11-01 12:02:29 | C | 03 12 28.035 | +00 17 36.08 | – | U | F52 |
| 2021-11-01 12:20:02 | C | 03 12 27.094 | +00 17 32.00 | – | U | F52 |
| 2021-11-06 09:33:35 | C | 03 06 17.637 | -00 07 57.26 | – | U | F52 |
| 2021-11-06 09:51:10 | C | 03 06 16.700 | -00 08 00.80 | – | U | F52 |
| 2021-11-06 10:08:50 | C | 03 06 15.741 | -00 08 04.32 | – | U | F52 |
| 2021-11-06 10:26:30 | C | 03 06 14.808 | -00 08 08.06 | – | U | F52 |
| 2021-11-10 07:07:55 | C | 03 01 25.38 | -00 25 42.9 | – | V | G96 |
| 2021-11-10 07:15:22 | C | 03 01 25.01 | -00 25 44.7 | – | V | G96 |
| 2021-11-10 07:22:53 | C | 03 01 24.59 | -00 25 46.0 | – | V | G96 |
| 2021-11-10 07:30:23 | C | 03 01 24.20 | -00 25 47.4 | – | V | G96 |
| 2021-11-11 08:41:37 | C | 03 00 06.651 | -00 30 07.61 | – | U | F51 |
| 2021-11-11 08:59:53 | C | 03 00 05.702 | -00 30 10.76 | – | U | F51 |
| 2021-11-11 09:18:21 | C | 03 00 04.734 | -00 30 13.85 | – | U | F51 |
| 2021-11-11 09:36:34 | C | 03 00 03.788 | -00 30 16.90 | – | U | F51 |
| 2021-11-25 06:13:10 | C | 02 44 12.562 | -01 09 38.94 | – | U | F52 |
| 2021-11-25 06:30:24 | C | 02 44 11.808 | -01 09 40.26 | – | U | F52 |
| 2021-11-25 06:47:41 | C | 02 44 11.057 | -01 09 41.58 | – | U | F52 |
| 2021-11-25 07:05:00 | C | 02 44 10.301 | -01 09 42.63 | – | U | F52 |
| 2021-11-26 06:33:33 | C | 02 43 10.164 | -01 11 11.15 | – | U | F51 |
| 2021-11-26 07:10:45 | C | 02 43 08.563 | -01 11 13.40 | – | U | F51 |
| 2021-11-26 07:30:08 | C | 02 43 07.720 | -01 11 14.63 | – | U | F51 |
| 2021-12-05 04:41:12 | C | 02 34 56.31 | -01 16 52.6 | – | V | G96 |
| 2021-12-05 04:51:43 | C | 02 34 55.94 | -01 16 52.7 | – | V | G96 |
| 2021-12-05 05:02:11 | C | 02 34 55.59 | -01 16 52.5 | – | V | G96 |
| 2022-11-30 08:19:17 | C | 05 01 01.992 | +08 24 18.61 | – | V | G96 |
| 2022-11-30 08:26:40 | C | 05 01 01.578 | +08 24 17.86 | – | V | G96 |
| 2022-11-30 08:34:04 | C | 05 01 01.265 | +08 24 16.24 | – | V | G96 |
| 2022-11-30 08:41:29 | C | 05 01 00.887 | +08 24 16.81 | – | V | G96 |
| 2023-12-16 14:50:01 | C | 13 04 17.602 | -05 57 28.66 | – | V | T08 |
| 2023-12-16 15:06:44 | C | 13 04 21.725 | -05 57 46.19 | – | V | T08 |
| 2023-12-16 15:14:13 | C | 13 04 23.647 | -05 57 54.90 | – | V | T08 |
| 2023-12-16 15:26:46 | C | 13 04 26.830 | -05 58 07.93 | – | V | T08 |
| 2023-12-17 12:30:03 | C | 13 09 47.826 | -06 20 50.28 | – | V | 703 |
| 2023-12-17 12:33:24 | C | 13 09 48.604 | -06 20 53.74 | – | V | 703 |
| 2023-12-17 12:36:45 | C | 13 09 49.518 | -06 20 58.45 | – | V | 703 |
| 2023-12-17 12:40:06 | C | 13 09 50.368 | -06 21 01.98 | – | V | 703 |
| 2024-01-03 12:55:01 | C | 15 13 15.326 | -13 34 48.36 | – | V | 703 |
| 2024-01-03 13:00:55 | C | 15 13 17.324 | -13 34 53.15 | – | V | 703 |
| 2024-01-03 13:06:49 | C | 15 13 19.344 | -13 34 58.73 | – | V | 703 |
| 2024-01-03 13:12:42 | C | 15 13 21.385 | -13 35 03.48 | – | V | 703 |
| 2024-09-02 13:27:19 | C | 03 50 26.804 | +06 12 56.81 | – | X | F51 |
| 2024-09-02 13:43:12 | C | 03 50 26.761 | +06 12 53.15 | – | X | F51 |
| 2024-09-02 13:59:08 | C | 03 50 26.713 | +06 12 49.12 | – | X | F51 |
| 2024-09-02 14:15:08 | C | 03 50 26.671 | +06 12 45.18 | – | X | F51 |
| 2024-09-11 09:34:42 | C | 03 49 03.824 | +05 19 35.51 | – | V | G96 |
| 2024-09-11 09:42:10 | C | 03 49 03.749 | +05 19 33.49 | – | V | G96 |
| 2024-09-11 09:49:38 | C | 03 49 03.648 | +05 19 31.73 | – | V | G96 |
| 2024-09-11 09:57:08 | C | 03 49 03.580 | +05 19 30.00 | – | V | G96 |
| 2024-09-14 13:40:58 | C | 03 48 01.086 | +04 58 40.16 | – | X | F51 |