In all gory detail from STS-135:
00...07...30...11:19:16 AM...Orbiter access arm retraction
00...05...00...11:21:46 AM...Launch window opens
00...05...00...11:21:46 AM...Hydraulic power system (APU) start
00...04...55...11:21:51 AM...Terminate LO2 replenish
00...04...00...11:22:46 AM...Purge sequence 4 hydraulic test
00...04...00...11:22:46 AM...IMUs to inertial
00...03...55...11:22:51 AM...Aerosurface profile
00...03...30...11:23:16 AM...Main engine steering test
00...02...55...11:23:51 AM...LO2 tank pressurization
00...02...35...11:24:11 AM...Fuel cells to internal reactants
00...02...30...11:24:16 AM...Clear caution-and-warning memory
00...02...00...11:24:46 AM...Crew closes visors
00...01...57...11:24:49 AM...LH2 tank pressurization
00...00...50...11:25:56 AM...SRB joint heater deactivation
00...00...31...11:26:15 AM...Shuttle GPCs take control of countdown
00...00...21...11:26:25 AM...SRB steering test
00...00...07...11:26:39 AM...Main engine start (T-6.6 seconds)
00...00...00...11:26:46 AM...SRB ignition (LAUNCH)
(last value speed in mph)
11:26:46 AM...T+00:00...LAUNCH
11:26:57 AM...T+00:11...START ROLL MANEUVER.........................927
11:27:04 AM...T+00:18...END ROLL MANEUVER.........................1,002
11:27:18 AM...T+00:32...START THROTTLE DOWN (72%).................1,200
11:27:35 AM...T+00:49...START THROTTLE UP (104.5%)................1,432
11:27:47 AM...T+01:01...MAX Q (744 psf)...........................1,650
11:28:49 AM...T+02:03...SRB STAGING...............................3,627
11:28:59 AM...T+02:13...START OMS ASSIST (1:23 duration)..........3,743
full ascent (and other data along):
Spaceflight Now | STS-135 Shuttle Report | Ascent Timeline