| Crew: 5 | CDR - Donald E. Williams |
| Plt - Michael J. McCulley | |
| MS 1 - Shannon W. Lucid | |
| MS 2 - Franklin R. Chang-Diaz (EV-1) | |
| MS 3 - Ellen S. Baker (EV 2) | |
| Launch | 18 October 1989 @ 1253:40.020 EDT |
| Orbital incl: | 34.32 |
| Max alt: | 334.7 km. |
| Orbits: | 79 |
| Dur: | 4:23:39:21 |
| Landing: | 18 October 1989 @ 0933:01 PDT |
| Launch Window: | 29 minutes (12:50 - 1:19 pm EDT) |
| Planetary window for Galileo: | 41 days: 12 October - 21 November 1989 |
| TAL Sites: | Zaragoza (alternate: Moron & Ben Guerir) Azragoza selected late due to bad weather at Ben Guerir TAL site. |
| AOA site: | Edwards AFB (alternate WS and KSC) |
| Primary landing site: | Edwards AFB, scheduled at 12:39 pm PDT 23 October |
| Landing Speed: | 196 knots (224 mph) |
| Landing rollout: | 9,677' from main gear touchdown |
| Vehicle weight @ liftoff: | 4,523,810 lbs |
| Orbiter weight @ liftoff: | 264,775 lbs |
| Orbiter weight @ landing: | 195,283 lbs |
| Cargo mass approx.: | 49,013 lbs |
| Landing Weight: | 10,625 lbs |
| Special mission kits: | EMU's 2001 & 2003, Galley, TAGS, teleprinter, PSA, payload bay liner and RTG cooling system, no RMS |
| Galileo Jupiter Probe/IUS-19 - 1989-089B | Deployed mass - 38,323 lbs. Galileo mass - 5,975 lbs |
| SSBUV - in 2 GAS cans | Shuttle Solar Backscatter Ultraviolet Instrument |
| Mid-deck | IMAX, PM (Polymer Morphology), MLE (see STS-26), AMOS (see Flt. 28), GHCD (Growth Hormone Concentration and Distribution in Plants), STEX (Sensor Technology Experiment), USAF/SDIO |
| SSIP | SE82-15 (Zero Gravity Growth of Ice Crystals) |
| SSME's: | 2027 (1), 2030 (2), & 2029 (3) - All 3rd use. At Tower Clear 104% |
| OMS Pods/Engines: | LP-01/106 - Pod 2nd use, Motor 11th use & RP-03/114 - Pod 10th use, Motor 3rd use |
| ET: | ET-27 (LWT-20) |
| SRB's: | BI-032 (RSRM-6) - Set successfully recovered |
| Left - 32A | Right - 32B | |||
| Q-7 | ? | Fwd | ? | 22 |
| Q-6 | ? | Cyl | ? | 20 |
| Q-6 | ? | Cyl | ? | New |
| Q-7 | ? | Cyl | ? | 24 |
| D-9 | ? | Cyl | ? | Q-7 |
| New | ? | Cyl | ? | 24 |
| Q-7 | ? | Cyl | ? | New |
| PVM | ? | Att | ? | New |
| Q-7 | ? | Stf | ? | 26 |
| Q-7 | ? | Stf | ? | 26 |
| Q-7 | ? | Aft | ? | PVM1 |
| 15 May 1989 | OV-104 returns to the OPF following Mission-29/STS-30R |
| 18 May 1989 | ET-27 arrives on dock KSC (from Vandenderg AFB storage) |
| 30 July 1989 | ET/SRB mate |
| 21 August 1989 | OV-104 rollover from OPF-2 to VAB High Bay 1 for stacking the follwoing day |
| 29 August 1989 | Stack rollout to Pad 39B |
| 30 August 1989 | Galileo installed in cargo bay at Pad 39B |
| 15 September 1989 | TCDT dress rehearsal conducted with crew aboard orbiter |
| 9 October 1989 | Original "Call to stations", 43 hr. countdown started at 8 am |
| 13 October 1989 | MEC is replaced on Atlantis |
| 14 October 1989 | Astronaut arrival at KSC |
| 16 October 1989 | "Call to stations" abbreviated countdown of 19 hrs. (at point was suspended 10 October) started at 12:01 am EDT |
| 18 October 1989 | Launch |
| 23 October 1989 | Landing at Edwards AFB |
| 28 October 1989 | First leg of ferry flight from Edwards AFB to Fort Biggs via Columbus AFB for fuel with an overnight stay |
| 29 October 1989 | Final leg of ferry flight from Fort Biggs to KSC |
| 31 October 1989 | OV-104 arrives at the OPF-1 |
| 7 December 1995 | Galileo arrives at Jupiter |