IAA Minor Planet Database| Epoch (TDB) | 2025-11-21 (JD 2461000.5) |
|---|---|
| Eccentricity (e) | 0.6542279075 ± 1.99e-07 |
| Semi-major axis (a) | 1.9258806662 AU ± 4.42e-09 |
| Inclination (i) | 9.55458398° ± 3.26e-05 |
| Long. of Asc. Node (Ω) | 23.94269674° ± 1.44e-05 |
| Arg. of Perihelion (ω) | 89.77132053° ± 4.04e-05 |
| Mean Anomaly (M) | 2.40507315° ± 5.65e-06 |
| Mean Motion (n) | 0.3687807270°/day ± 1.27e-09 |
| Perihelion dist (q) | 0.66591579 AU ± 3.83e-07 |
| Aphelion dist (Q) | 3.18584554 AU ± 3.83e-07 |
| Orbital Period | 2.67266213 yr ± 9.21e-09 |
| H (abs. magnitude) | 20.14 |
|---|---|
| G (slope) | 0.15 |
1999 HC
| Source | IAA |
|---|---|
| Solution Date | 2026-05-31 |
| RMS Residual | 0.500″ |
| Uncertainty | 0 |
| Orbit Type | Apollo |
| MOID | 0.025338 AU |
| Observations Used | 90 |
| Oppositions | 5 |
| Arc Total | 1991-2025 |
| First Observation Used | 1991-04-11 |
| Last Observation Used | 1999-04-25 |
| Date | Type | RA | Dec | Mag | Band | Observatory |
|---|---|---|---|---|---|---|
| 2023-06-10 04:45:38 | C | 11 51 14.76 | -05 17 33.1 | – | o | 291 |
| 2023-06-10 04:58:09 | C | 11 51 16.34 | -05 17 45.7 | – | o | 291 |
| 2025-10-03 12:02:19 | C | 08 14 11.962 | +24 39 09.25 | – | V | G96 |
| 2025-10-03 12:08:30 | C | 08 14 14.496 | +24 39 06.16 | – | V | G96 |
| 2025-10-03 12:14:39 | C | 08 14 17.009 | +24 39 03.46 | – | V | G96 |
| 2025-10-03 12:20:49 | C | 08 14 19.597 | +24 39 00.40 | – | V | G96 |
| 1999-04-16 07:18:02 | C | 11 35 38.20 | +06 25 56.4 | 18.2 | a | 704 |
| 1999-04-16 07:32:57 | C | 11 35 42.46 | +06 24 15.6 | 17.9 | a | 704 |
| 1999-04-16 07:48:14 | C | 11 35 46.86 | +06 22 31.8 | 18.0 | a | 704 |
| 1999-04-16 08:03:41 | C | 11 35 51.35 | +06 20 47.8 | 17.6 | a | 704 |
| 1999-04-16 08:19:33 | C | 11 35 55.88 | +06 19 01.7 | – | a | 704 |
| 1999-04-17 05:02:24 | c | 11 41 47.02 | +04 10 14.9 | – | d | 703 |
| 1999-04-17 05:13:56 | c | 11 41 49.73 | +04 09 08.4 | – | d | 703 |
| 1999-04-17 05:25:28 | c | 11 41 52.53 | +04 08 02.0 | – | d | 703 |
| 1999-04-17 05:36:45 | c | 11 41 55.23 | +04 06 57.5 | – | d | 703 |
| 1999-04-17 06:48:21 | c | 11 42 12.31 | +04 00 08.0 | – | d | 703 |
| 1999-04-17 06:56:21 | c | 11 42 14.19 | +03 59 22.0 | – | d | 703 |
| 1999-04-17 07:09:52 | c | 11 42 17.42 | +03 58 05.3 | – | d | 703 |
| 1999-04-17 07:25:07 | c | 11 42 21.07 | +03 56 38.6 | – | d | 703 |
| 1999-04-17 09:15:24 | c | 11 42 47.47 | +03 46 16.6 | – | d | 703 |
| 1999-04-17 09:18:23 | c | 11 42 48.20 | +03 45 59.6 | – | d | 703 |
| 1999-04-17 20:24:06 | C | 11 45 33.11 | +02 46 06.1 | – | d | 046 |
| 1999-04-17 20:25:21 | C | 11 45 33.39 | +02 45 59.8 | – | d | 046 |
| 1999-04-17 20:26:31 | C | 11 45 33.64 | +02 45 53.5 | – | d | 046 |
| 1999-04-17 20:28:39 | C | 11 45 34.10 | +02 45 42.3 | – | d | 046 |
| 1999-04-18 21:42:08 | C | 11 50 57.21 | +00 45 54.4 | – | b | 118 |
| 1999-04-18 21:46:05 | C | 11 50 57.95 | +00 45 37.3 | – | b | 118 |
| 1999-04-18 21:47:01 | C | 11 50 58.13 | +00 45 33.3 | – | b | 118 |
| 1999-04-19 19:07:06 | C | 11 54 57.89 | -00 41 21.8 | – | z | 104 |
| 1999-04-19 19:09:29 | C | 11 54 58.32 | -00 41 30.5 | – | z | 104 |
| 1999-04-19 19:12:09 | C | 11 54 58.83 | -00 41 40.5 | – | z | 104 |
| 1999-04-19 19:14:50 | C | 11 54 59.19 | -00 41 51.2 | 16.8 | z | 104 |
| 1999-04-20 03:44:03 | C | 11 56 22.18 | -01 12 17.9 | – | z | 860 |
| 1999-04-20 03:52:04 | C | 11 56 23.46 | -01 12 47.2 | – | z | 860 |
| 1999-04-20 03:54:52 | C | 11 56 27.09 | -01 13 49.3 | – | z | 719 |
| 1999-04-20 04:00:45 | C | 11 56 28.06 | -01 14 11.3 | – | z | 719 |
| 1999-04-20 05:44:44 | C | 11 56 43.73 | -01 20 24.6 | – | z | 719 |
| 1999-04-20 05:51:06 | C | 11 56 44.71 | -01 20 47.9 | – | z | 719 |
| 1999-04-20 11:10:59 | C | 11 57 38.74 | -01 39 30.5 | – | – | 360 |
| 1999-04-20 11:17:30 | C | 11 57 39.69 | -01 39 53.1 | – | – | 360 |
| 1999-04-20 11:19:30 | C | 11 57 39.96 | -01 39 59.6 | – | – | 360 |
| 1999-04-24 01:47:45 | C | 12 08 55.15 | -05 36 31.6 | – | z | 860 |
| 1999-04-24 01:54:32 | C | 12 08 55.79 | -05 36 46.4 | – | z | 860 |
| 1999-04-24 01:59:58 | C | 12 08 56.36 | -05 36 58.8 | – | z | 860 |
| 1999-04-24 15:28:35 | C | 12 10 20.02 | -06 05 58.1 | – | – | 385 |
| 1999-04-24 15:42:38 | C | 12 10 21.32 | -06 06 25.0 | – | – | 385 |
| 1999-04-25 11:40:37 | C | 12 12 21.59 | -06 45 13.4 | – | – | 385 |
| 1999-04-25 11:49:11 | C | 12 12 22.34 | -06 45 29.3 | – | – | 385 |