| Date | Change Type | Time Delta (hours) | Reason |
| Oct 31, 2017 | OBSERVER_REQUESTED | -0.5 | Christine Chen email October 31, 2017 |
| Oct 31, 2017 | ADMINISTRATION | +0.5 | Reversed previous change made in error. |
| Oct 31, 2017 | OBSERVER_REQUESTED | +0.5 | Christine Chen email October 31, 2017 |
| Nov 06, 2017 | OBSERVER_REQUESTED | -0.5 | Reversed previous change as per November 6, 2017 email from Christine Chen |
| Jun 24, 2019 | FAILURE_REPEAT | -2.6 | Corrected error left over from rollback of previous allocaiton adjustments from APT overhead changes. |
| Mar 23, 2020 | OBSERVER_REQUESTED | +0.2 | Allocation time changed after update from observer |
| Dec 19, 2020 | OVERHEAD_CHANGE | +0.6 | APT 2020.5 |
| Jul 01, 2021 | OVERHEAD_CHANGE | +0.6 | APT 2021.2 |
| Oct 04, 2021 | OBSERVER_REQUESTED | +0.5 | 0.5 hours transferred from GTO program 1242 |
| Sep 28, 2022 | OBSERVER_REQUESTED | +1.1 | As per September 28, 2022 email from Christine Chen |
| Nov 18, 2022 | OVERHEAD_CHANGE | +0.3 | APT 2022.7.1 |
| Dec 14, 2022 | STSCI_RECOMMENDATION | +0.9 | This change reflects an additional background image which was added by IS recommendation after post-commissioning data recommended this change |
| Mar 27, 2023 | TRANSFER | +2.4 | Time transfer from GTO 1242 to GTO 1294 |
