Year | Center X | Center Y | Major Semi-axis | Minor Semi-axis | Rotation | Oblateness |
1990 | 630174.76 | 3838077.47 | 5909.41 | 1886.75 | 74.37 | 0.68 |
2000 | 630389.75 | 3837770.61 | 6506.66 | 2532.69 | 68.16 | 0.61 |
2010 | 631580.87 | 3835026.54 | 7801.44 | 6164.92 | 105.03 | 0.21 |
2020 | 632579.57 | 3834199.34 | 9318.92 | 6961.77 | 100.58 | 0.25 |