IAA Minor Planet Database| Epoch (TDB) | 2025-11-21 (JD 2461000.5) |
|---|---|
| Eccentricity (e) | 0.6415366209 ± 2.36e-09 |
| Semi-major axis (a) | 2.7239591426 AU ± 3.38e-09 |
| Inclination (i) | 13.83939906° ± 7.44e-07 |
| Long. of Asc. Node (Ω) | 133.62545012° ± 1.75e-06 |
| Arg. of Perihelion (ω) | 166.78539540° ± 4.11e-06 |
| Mean Anomaly (M) | 316.52624905° ± 2.49e-06 |
| Mean Motion (n) | 0.2192357591°/day ± 4.08e-10 |
| Perihelion dist (q) | 0.97643960 AU ± 6.55e-09 |
| Aphelion dist (Q) | 4.47147869 AU ± 8.50e-09 |
| Orbital Period | 4.49573686 yr ± 8.37e-09 |
| H (abs. magnitude) | 15.35 |
|---|---|
| G (slope) | 0.15 |
1990 HD1
| Source | IAA |
|---|---|
| Solution Date | 2026-05-31 |
| RMS Residual | 0.109″ |
| Uncertainty | 0 |
| Orbit Type | Apollo |
| MOID | 0.026857 AU |
| Observations Used | 1289 |
| Radar Obs Used | 61 |
| Gaia Obs Used | 38 |
| Oppositions | 21 |
| Arc Total | 1990-2025 |
| First Observation Used | 1990-04-27 |
| Last Observation Used | 2025-12-10 |
| Date | Type | RA | Dec | Mag | Band | Observatory |
|---|---|---|---|---|---|---|
| 2017-11-13 10:25:12 | C | 03 46 07.34 | -06 12 59.7 | – | U | T05 |
| 2017-11-13 10:36:39 | C | 03 46 06.62 | -06 12 59.4 | – | U | T05 |
| 2017-11-13 10:46:47 | C | 03 46 05.97 | -06 12 59.1 | – | U | T05 |
| 2017-11-15 10:16:32 | C | 03 43 13.48 | -06 11 20.6 | – | U | T08 |
| 2017-11-15 10:29:59 | C | 03 43 12.63 | -06 11 19.7 | – | U | T08 |
| 2017-11-15 10:42:56 | C | 03 43 11.82 | -06 11 19.0 | – | U | T08 |
| 2017-11-16 08:09:38 | C | 03 41 55.05 | -06 10 09.9 | – | U | 703 |
| 2017-11-16 08:17:45 | C | 03 41 54.55 | -06 10 09.6 | – | U | 703 |
| 2017-11-16 08:25:43 | C | 03 41 54.06 | -06 10 09.1 | – | U | 703 |
| 2017-11-16 08:33:42 | C | 03 41 53.57 | -06 10 08.8 | – | U | 703 |
| 2017-11-17 10:13:54 | C | 03 40 22.98 | -06 08 21.8 | – | U | T05 |
| 2017-11-17 10:26:28 | C | 03 40 22.20 | -06 08 20.4 | – | U | T05 |
| 2017-11-17 10:39:25 | C | 03 40 21.45 | -06 08 20.0 | – | U | T05 |
| 2017-11-17 10:54:11 | C | 03 40 20.55 | -06 08 18.7 | – | U | T05 |
| 2017-11-18 20:26:07 | C | 03 38 24.30 | -06 05 29.2 | – | U | 108 |
| 2017-11-18 20:30:40 | C | 03 38 24.03 | -06 05 28.9 | – | U | 108 |
| 2017-11-18 20:35:14 | C | 03 38 23.76 | -06 05 28.4 | – | U | 108 |
| 2017-11-20 08:04:47 | C | 03 36 22.75 | -06 01 45.0 | – | U | 703 |
| 2017-11-20 08:12:36 | C | 03 36 22.29 | -06 01 44.2 | – | U | 703 |
| 2017-11-20 08:21:52 | C | 03 36 21.78 | -06 01 43.0 | – | U | 703 |
| 2017-11-20 08:32:12 | C | 03 36 21.19 | -06 01 40.9 | – | U | 703 |
| 2017-11-21 10:03:11 | C | 03 34 56.45 | -05 58 35.5 | – | U | T05 |
| 2017-11-21 10:15:37 | C | 03 34 55.73 | -05 58 33.7 | – | U | T05 |
| 2017-11-21 10:27:33 | C | 03 34 55.05 | -05 58 32.2 | – | U | T05 |
| 2017-11-22 08:37:39 | C | 03 33 42.52 | -05 55 35.6 | – | U | G96 |
| 2017-11-22 08:45:48 | C | 03 33 42.07 | -05 55 34.5 | – | U | G96 |
| 2017-11-22 08:53:57 | C | 03 33 41.61 | -05 55 33.2 | – | U | G96 |
| 2017-11-22 09:02:10 | C | 03 33 41.15 | -05 55 32.2 | – | U | G96 |
| 2017-11-23 09:25:43 | C | 03 32 23.25 | -05 51 57.8 | – | U | T08 |
| 2017-11-23 09:37:32 | C | 03 32 22.61 | -05 51 55.8 | – | U | T08 |
| 2017-11-23 09:50:58 | C | 03 32 21.87 | -05 51 53.9 | – | U | T08 |
| 2017-11-23 10:04:44 | C | 03 32 21.13 | -05 51 51.5 | – | U | T08 |
| 2017-11-24 07:48:55 | C | 03 31 12.80 | -05 48 27.5 | – | U | 703 |
| 2017-11-24 08:00:01 | C | 03 31 12.24 | -05 48 25.5 | – | U | 703 |
| 2017-11-24 08:10:57 | C | 03 31 11.66 | -05 48 23.9 | – | U | 703 |
| 2017-11-24 08:21:57 | C | 03 31 11.04 | -05 48 21.9 | – | U | 703 |
| 2017-11-24 09:23:24 | C | 03 31 08.070 | -05 48 10.60 | – | L | F51 |
| 2017-11-24 09:38:22 | C | 03 31 07.272 | -05 48 08.18 | – | L | F51 |
| 2017-11-24 09:39:17 | C | 03 31 07.222 | -05 48 08.01 | – | L | F51 |
| 2017-11-24 09:54:15 | C | 03 31 06.419 | -05 48 05.60 | – | L | F51 |
| 2017-11-24 09:55:10 | C | 03 31 06.368 | -05 48 05.41 | – | L | F51 |
| 2017-11-24 10:10:10 | C | 03 31 05.567 | -05 48 02.94 | – | L | F51 |
| 2017-11-24 10:11:06 | C | 03 31 05.519 | -05 48 02.78 | – | L | F51 |
| 2017-11-25 06:23:01 | C | 03 30 03.53 | -05 44 39.2 | – | U | G96 |
| 2017-11-25 06:30:30 | C | 03 30 03.14 | -05 44 37.9 | – | U | G96 |
| 2017-11-25 06:38:01 | C | 03 30 02.74 | -05 44 36.6 | – | U | G96 |
| 2017-11-25 06:45:33 | C | 03 30 02.34 | -05 44 35.3 | – | U | G96 |
| 2017-11-27 04:44:37 | C | 03 27 45.78 | -05 36 05.7 | – | U | 703 |
| 2017-11-27 04:52:20 | C | 03 27 45.42 | -05 36 03.9 | – | U | 703 |
| 2017-11-27 05:00:02 | C | 03 27 45.01 | -05 36 02.6 | – | U | 703 |
| Epoch (UTC) | Value | Sigma | Units | Freq (MHz) | Receiver | Transmitter |
|---|---|---|---|---|---|---|
| 1999-07-18 21:30:00 | 580912.511 | 0.25 | Hz | 8560 | -14 | -14 |
| 1999-07-19 02:00:00 | 566126.916 | 0.25 | Hz | 8560 | -14 | -14 |
| 1999-07-20 02:30:00 | 547776.718 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-20 02:50:00 | 546793.21 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-07-21 17:40:00 | 528308.379 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-21 18:20:00 | 83757463.53 | 1.5 | us | 8560 | -14 | -14 |
| 1999-07-21 18:20:00 | 527307.055 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-07-23 00:40:00 | 475428.166 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-23 01:20:00 | 473106.036 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-07-24 17:00:00 | 420950.68 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-24 18:30:00 | 69514032.67 | 1.5 | us | 8560 | -14 | -14 |
| 1999-07-24 18:30:00 | 415857.814 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-07-24 19:30:00 | 69339970.64 | 1.5 | us | 8560 | -14 | -14 |
| 1999-07-24 19:30:00 | 411834.668 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-07-27 01:30:00 | 264385.859 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-27 02:20:00 | 61419497.12 | 1 | us | 8560 | -14 | -14 |
| 1999-07-27 02:20:00 | 262192.676 | 0.25 | Hz | 8560 | -14 | -14 |
| 1999-07-28 17:10:00 | 150647.08 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-28 18:40:00 | 57849240.61 | 1 | us | 8560 | -14 | -14 |
| 1999-07-28 18:40:00 | 140398.678 | 0.25 | Hz | 8560 | -14 | -14 |
| 1999-07-31 17:00:00 | -115965.979 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-07-31 19:30:00 | 57566121.29 | 1 | us | 8560 | -14 | -14 |
| 1999-07-31 19:30:00 | -135124.045 | 0.25 | Hz | 8560 | -14 | -14 |
| 1999-08-01 12:00:00 | -163434.49 | 0.5 | Hz | 8560 | -14 | -14 |
| 1999-08-01 13:00:00 | 58699578.17 | 1 | us | 8560 | -14 | -14 |
| 1999-08-01 13:20:00 | 58716453.68 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-01 13:20:00 | -51647.361 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-01 13:50:00 | 58759820.31 | 1 | us | 8560 | -14 | -14 |
| 1999-08-02 13:30:00 | 60978578.03 | 1 | us | 2380 | -1 | -1 |
| 1999-08-02 13:30:00 | -73358.825 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-03 13:20:00 | 63910961.67 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-03 13:20:00 | -91544.639 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-04 13:30:00 | 67496417.05 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-04 13:30:00 | -107708.209 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-05 12:40:00 | 71416546.18 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-05 12:40:00 | -118977.568 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-06 12:50:00 | 75926730.74 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-06 12:50:00 | -130189.031 | 0.05 | Hz | 2380 | -1 | -1 |
| 1999-08-07 17:40:00 | 81769055.04 | 1.5 | us | 8560 | -14 | -14 |
| 1999-08-07 17:40:00 | -512022.813 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-08-08 14:00:00 | 86112562.88 | 1.5 | us | 8560 | -14 | -14 |
| 1999-08-08 14:00:00 | -513572.349 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-08-08 19:00:00 | 87225305.13 | 1.5 | us | 8560 | -14 | -14 |
| 1999-08-08 19:00:00 | -542275.126 | 0.3 | Hz | 8560 | -14 | -14 |
| 1999-08-09 11:20:00 | 90841551.93 | 0.5 | us | 2380 | -1 | -1 |
| 1999-08-09 11:20:00 | -148932.797 | 0.05 | Hz | 2380 | -1 | -1 |
| 2008-05-29 09:20:00 | 12594.078 | 0.1 | Hz | 2380 | -1 | -1 |
| 2008-05-29 10:30:00 | 315046630.94 | 1 | us | 2380 | -1 | -1 |
| 2008-05-29 10:30:00 | 10369.278 | 0.1 | Hz | 2380 | -1 | -1 |
| 2008-05-30 09:00:00 | 5551.355 | 0.2 | Hz | 2380 | -1 | -1 |
| 2008-05-30 10:20:00 | 314782127.18 | 1 | us | 2380 | -1 | -1 |
| 2008-05-30 10:20:00 | 3023.025 | 0.1 | Hz | 2380 | -1 | -1 |
| 2008-05-31 09:10:00 | -2381.041 | 0.2 | Hz | 2380 | -1 | -1 |
| 2008-05-31 10:20:00 | 314797235.75 | 1.5 | us | 2380 | -1 | -1 |
| 2008-05-31 10:20:00 | -4594.449 | 0.1 | Hz | 2380 | -1 | -1 |
| 2008-06-01 09:00:00 | -9636.645 | 0.2 | Hz | 2380 | -1 | -1 |
| 2008-06-01 10:20:00 | 315092662 | 1.5 | us | 2380 | -1 | -1 |
| 2008-06-01 10:20:00 | -12151.259 | 0.1 | Hz | 2380 | -1 | -1 |
| 2008-06-02 09:10:00 | -17431.599 | 0.2 | Hz | 2380 | -1 | -1 |
| 2008-06-02 10:30:00 | 315670902.49 | 1.5 | us | 2380 | -1 | -1 |
| 2008-06-02 10:30:00 | -19951.241 | 0.1 | Hz | 2380 | -1 | -1 |