Orbital elements of H-1 R/B
| Launched | 6 February 1990 |
| Flight ended | – |
| Launch site | Tanegashima Space Center, Japan |
| Owner | Japan |
| NORAD ID | 20491 |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| 2025 May 09 17:57 | 2025 May 08 23:14:01 | 99.0155 | 0.04684 | 8.5889 | 26.4610 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 08 17:56 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 07 17:56 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 06 17:57 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 05 17:56 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 04 17:57 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 03 17:57 | 2025 May 03 14:18:45 | 99.0152 | 0.04687 | 8.2887 | 39.0801 | 335.9623 | 13.03725 | 4.743 |
| 2025 May 01 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 30 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 29 17:57 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 27 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 26 17:57 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 25 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 24 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 23 17:57 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 22 17:56 | 2025 Apr 22 13:05:55 | 99.0130 | 0.04689 | 7.6711 | 64.9795 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 21 17:57 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 20 17:56 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 19 17:56 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 18 17:57 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 17 17:56 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 16 17:57 | 2025 Apr 15 22:42:13 | 99.0129 | 0.04688 | 7.3024 | 80.4367 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 15 17:56 | 2025 Apr 10 15:37:05 | 99.0138 | 0.04687 | 7.0065 | 92.8452 | 335.9623 | 13.03725 | 4.743 |
| 2025 Apr 14 17:56 | 2025 Apr 10 15:37:05 | 99.0138 | 0.04687 | 7.0065 | 92.8452 | 335.9623 | 13.03725 | 4.743 |