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 Dec 07 18:56 | 2025 Dec 07 03:46:17 | 99.0385 | 0.04671 | 20.4590 | 248.0623 | 107.0229 | 13.03730 | 4.743 |
| 2025 Dec 06 18:56 | 2025 Dec 02 11:25:15 | 99.0389 | 0.04671 | 20.1967 | 259.0721 | 107.0229 | 13.03730 | 4.743 |
| 2025 Dec 05 18:57 | 2025 Dec 02 11:25:15 | 99.0389 | 0.04671 | 20.1967 | 259.0721 | 107.0229 | 13.03730 | 4.743 |
| 2025 Dec 04 18:57 | 2025 Dec 02 11:25:15 | 99.0389 | 0.04671 | 20.1967 | 259.0721 | 107.0229 | 13.03730 | 4.743 |
| 2025 Dec 03 18:56 | 2025 Dec 02 11:25:15 | 99.0389 | 0.04671 | 20.1967 | 259.0721 | 107.0229 | 13.03730 | 4.743 |
| 2025 Dec 02 18:56 | 2025 Dec 02 11:25:15 | 99.0389 | 0.04671 | 20.1967 | 259.0721 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 30 18:57 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 29 18:56 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 28 18:57 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 27 18:57 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 26 18:57 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 25 18:57 | 2025 Nov 25 09:58:35 | 99.0386 | 0.04670 | 19.8011 | 275.6864 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 24 18:56 | 2025 Nov 20 04:44:13 | 99.0376 | 0.04671 | 19.5087 | 287.9535 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 23 18:57 | 2025 Nov 20 04:44:13 | 99.0376 | 0.04671 | 19.5087 | 287.9535 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 21 18:57 | 2025 Nov 20 04:44:13 | 99.0376 | 0.04671 | 19.5087 | 287.9535 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 20 18:56 | 2025 Nov 20 04:44:13 | 99.0376 | 0.04671 | 19.5087 | 287.9535 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 18 18:57 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 16 18:58 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 15 18:57 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 13 18:56 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 12 18:57 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 11 18:55 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |
| 2025 Nov 10 18:57 | 2025 Nov 08 20:09:36 | 99.0344 | 0.04674 | 18.8725 | 314.6452 | 107.0229 | 13.03730 | 4.743 |