Changes and additions:
- August 14: Posting initial release
- September 5: Updating to reflect new launch date
- September 22: Updating with new in-plane launch time
- September 24: Updating to reflect new launch date
- September 26: Updating to reflect revised launch time
- January 22: Updating for May 12 launch date
- March 31: Updating throughout
- April 28: Updating for May 12 launch date

DATE/EDT.......DD...HH...MM...EVENT



Flight Day 1

05/11/09
Mon 02:01 PM...00...00...00...STS-125 launch
Mon 02:44 PM...00...00...43...OMS-2 rocket firing
Mon 02:51 PM...00...00...50...Post insertion timeline begins
Mon 04:31 PM...00...02...30...Laptop computer network setup
Mon 04:31 PM...00...02...30...SSE activation; OCAC setup
Mon 04:41 PM...00...02...40...SRMS powerup
Mon 04:56 PM...00...02...55...SRMS checkout
Mon 05:01 PM...00...03...00...BSA install and config
Mon 06:00 PM...00...03...59...NC-1 rendezvous rocket firing
Mon 06:01 PM...00...04...00...SRMS payload bay survey
Mon 06:16 PM...00...04...15...ET video downlink
Mon 06:21 PM...00...04...20...GIRA installation
Mon 06:21 PM...00...04...20...SRMS crew cabin survey
Mon 06:21 PM...00...04...20...Wing leading edge sensor system activation
Mon 06:26 PM...00...04...25...SSE checkout
Mon 06:41 PM...00...04...40...Umbilical well camera downlink
Mon 07:11 PM...00...05...10...HDTV ET video downlink
Mon 07:21 PM...00...05...20...SEE setup
Mon 07:26 PM...00...05...25...Group B computer powerdown
Mon 09:01 PM...00...07...00...Crew sleep begins

Flight Day 2

05/12/09
Tue 05:01 AM...00...15...00...Crew wakeup
Tue 06:26 AM...00...16...25...NC-2 rendezvous rocket firing
Tue 07:01 AM...00...17...00...SRMS unberths OBSS
Tue 07:36 AM...00...17...35...Airlock prepped
Tue 08:16 AM...00...18...15...Flight support structure prepped
Tue 08:26 AM...00...18...25...Spacesuit checkout
Tue 09:01 AM...00...19...00...Starboard RCC survey
Tue 09:41 AM...00...19...40...Spacesuit swap
Tue 09:51 AM...00...19...50...Starboard belly tile survey
Tue 10:11 AM...00...20...10...Spacesuit checkout
Tue 10:16 AM...00...20...15...Starboard wing RCC survey
Tue 10:26 AM...00...20...25...Crew meals begin
Tue 11:31 AM...00...21...30...Nose cap survey
Tue 12:21 PM...00...22...20...Port wing RCC survey
Tue 12:36 PM...00...22...35...REBA checkout
Tue 01:06 PM...00...23...05...EVA tool unstow/config
Tue 01:11 PM...00...23...10...Port belly tile survey
Tue 01:31 PM...00...23...30...10.2 psi depressurization
Tue 02:26 PM...01...00...25...Ergometer setup
Tue 02:31 PM...01...00...30...HST: Solid state recorder playback
Tue 03:06 PM...01...01...05...Port wing RCC survey
Tue 04:06 PM...01...02...05...T-0 umbilical survey
Tue 04:21 PM...01...02...20...OBSS berthing
Tue 05:21 PM...01...03...20...FCMS ops
Tue 05:36 PM...01...03...35...Rendezvous tools checkout
Tue 05:36 PM...01...03...35...OMS pod survey
Tue 05:51 PM...01...03...50...LDRI downlink
Tue 06:01 PM...01...04...00...HST: Aperture door closed
Tue 06:41 PM...01...04...40...NC-3 rendezvous rocket firing
Tue 09:01 PM...01...07...00...Crew sleep begins
Tue 09:36 PM...01...07...35...HST: Maneuver to rendezvous attitude
Tue 10:01 PM...01...08...00...HST: Low-gain direct to TDRS
Tue 10:26 PM...01...08...25...HST: 3 gyro ops reconfig

05/13/09
Wed 03:26 AM...01...13...25...HST: High gain antenna retraction

Flight Day 3

Wed 05:01 AM...01...15...00...Crew wakeup
Wed 07:26 AM...01...17...25...Group B computer powerup
Wed 07:41 AM...01...17...40...Rendezvous operations timeline begins
Wed 08:11 AM...01...18...10...Middeck preps
Wed 08:41 AM...01...18...40...EVA-1; Tools configured
Wed 08:51 AM...01...18...50...HST: Solar arrays slewed to 90 degrees
Wed 09:02 AM...01...19...01...NC-4 rendezvous rocket firing
Wed 10:41 AM...01...20...40...TI rendezvous rocket firing
Wed 12:01 PM...01...22...00...HST: Move to capture attitude
Wed 12:54 PM...01...22...53...HST capture
Wed 01:46 PM...01...23...45...HST berthing
Wed 02:01 PM...02...00...00...HST survey
Wed 02:16 PM...02...00...15...External power on
Wed 02:46 PM...02...00...45...Group B power down
Wed 03:56 PM...02...01...55...SRMS park
Wed 04:21 PM...02...02...20...HST: Solar arrays slewed to 0 degrees
Wed 04:41 PM...02...02...40...EVA-1: Procedures review
Wed 06:26 PM...02...04...25...HDTV downlink
Wed 08:31 PM...02...06...30...Crew sleep begins
Wed 09:21 PM...02...07...20...HST: KU-band checkout
Wed 09:46 PM...02...07...45...HST: Engineering data playback

Flight Day 4

05/14/09
Thu 03:01 AM...02...13...00...HST: SSR engineering playback
Thu 04:31 AM...02...14...30...Crew wakeup
Thu 05:46 AM...02...15...45...EVA-1: Preparations begin
Thu 07:16 AM...02...17...15...EVA-1: Spacesuit purge
Thu 07:26 AM...02...17...25...EVA-1: Spacesuit pre-breathe
Thu 08:06 AM...02...18...05...EVA-1: Airlock depressurization
Thu 08:16 AM...02...18...15...EVA-1: Spacesuits to battery power
Thu 08:21 AM...02...18...20...EVA-1: Airlock egress and setup
Thu 09:21 AM...02...19...20...EVA-1: WFC 3 installation
Thu 09:21 AM...02...19...20...HST: WFC3 aliveness test
Thu 11:36 AM...02...21...35...EVA-1: SI C&DH installation
Thu 12:56 PM...02...22...55...HST: SI C&DH aliveness test
Thu 01:06 PM...02...23...05...EVA-1: SCM and locks
Thu 02:01 PM...03...00...00...EVA-1: Cleanup and airlock ingress
Thu 02:01 PM...03...00...00...HST: SI C&DH functional test
Thu 02:36 PM...03...00...35...HST: Solar array slewed to 90 degrees
Thu 02:46 PM...03...00...45...EVA-1: Airlock repressurization
Thu 02:56 PM...03...00...55...Spacesuit servicing
Thu 03:36 PM...03...01...35...HST: WFC3 functional test
Thu 04:01 PM...03...02...00...EVA-2: Tools configured
Thu 04:01 PM...03...02...00...Spacesuit swap
Thu 05:01 PM...03...03...00...EVA-2: Procedures review
Thu 08:31 PM...03...06...30...Crew sleep begins
Thu 09:46 PM...03...07...45...HST: SSR engineering playback

05/15/09
Fri 01:16 AM...03...11...15...HST: SSR engineering playback

Flight Day 5

Fri 03:01 AM...03...13...00...HST: Bay 2 battery discharge
Fri 04:31 AM...03...14...30...Crew wakeup
Fri 05:46 AM...03...15...45...EVA-2: Preparations begin
Fri 07:16 AM...03...17...15...EVA-2: Spacesuit purge
Fri 07:26 AM...03...17...25...EVA-2: Spacesuit pre-breathe
Fri 08:06 AM...03...18...05...EVA-2: Airlock depressurization
Fri 08:16 AM...03...18...15...EVA-2: Spacesuits to battery power
Fri 08:21 AM...03...18...20...EVA-2: Airlock egress and setup
Fri 09:01 AM...03...19...00...EVA-2: Rate sensing unit replacement
Fri 12:21 PM...03...22...20...EVA-2: Bay 2 battery pack
Fri 01:56 PM...03...23...55...EVA-2: Cleanup and airlock ingress
Fri 02:01 PM...04...00...00...HST: Battery aliveness test
Fri 02:36 PM...04...00...35...HST: Solar arrays slewed to 90 degrees
Fri 02:41 PM...04...00...40...EVA-2: Airlock repressurization
Fri 02:51 PM...04...00...50...Spacesuit servicing
Fri 03:01 PM...04...01...00...HST: Battery functional test
Fri 03:56 PM...04...01...55...EVA-3: Tools configured
Fri 03:56 PM...04...01...55...LIOH and battery config
Fri 04:16 PM...04...02...15...Spacesuit swap
Fri 04:51 PM...04...02...50...HST: Solar arrays slewed to 0 degrees
Fri 05:11 PM...04...03...10...HST: RSU functional test
Fri 05:21 PM...04...03...20...EVA-3: Procedures review
Fri 08:31 PM...04...06...30...Crew sleep begins
Fri 08:41 PM...04...06...40...HST: SSR engineering playback

Flight Day 6

05/16/09
Sat 03:26 AM...04...13...25...HST: SSR engineering playback
Sat 04:31 AM...04...14...30...Crew wakeup
Sat 05:46 AM...04...15...45...EVA-3: Preparations begin
Sat 07:16 AM...04...17...15...EVA-3: Spacesuit purge
Sat 07:26 AM...04...17...25...EVA-3: Spacesuit pre-breathe
Sat 08:06 AM...04...18...05...EVA-3: Airlock depressurization
Sat 08:16 AM...04...18...15...EVA-3: Spacesuits to battery power
Sat 08:21 AM...04...18...20...EVA-3: Airlock egress and setup
Sat 08:46 AM...04...18...45...EVA-3: Cosmic Origins Spectrograph
Sat 10:46 AM...04...20...45...HST: COS aliveness test
Sat 11:36 AM...04...21...35...EVA-3: ACS repair (part 1)
Sat 02:01 PM...05...00...00...EVA-3: Cleanup and airlock ingress
Sat 02:46 PM...05...00...45...EVA-3: Airlock repressurization
Sat 02:46 PM...05...00...45...HST: COS functional test
Sat 02:56 PM...05...00...55...Spacesuit servicing
Sat 04:01 PM...05...02...00...EVA-4: Tools configured
Sat 04:01 PM...05...02...00...LIOH and battery config
Sat 04:21 PM...05...02...20...Spacesuit swap
Sat 05:21 PM...05...03...20...EVA-4: Procedures review
Sat 08:31 PM...05...06...30...Crew sleep begins
Sat 09:46 PM...05...07...45...HST: SSR engineering playback

Flight Day 7

05/17/09
Sun 03:31 AM...05...13...30...HST: SSR engineering playback
Sun 04:31 AM...05...14...30...Crew wakeup
Sun 05:46 AM...05...15...45...EVA-4: Preparations begin
Sun 07:16 AM...05...17...15...EVA-4: Spacesuit purge
Sun 07:26 AM...05...17...25...EVA-4: Spacesuit pre-breathe
Sun 08:06 AM...05...18...05...EVA-4: Airlock depressurization
Sun 08:16 AM...05...18...15...EVA-4: Spacesuits to battery power
Sun 08:21 AM...05...18...20...EVA-4: Airlock egress and setup
Sun 08:46 AM...05...18...45...EVA-4: STIS repair
Sun 12:26 PM...05...22...25...HST: STIS aliveness test
Sun 12:56 PM...05...22...55...HST: STIS functional test
Sun 01:16 PM...05...23...15...EVA-4: NOBL 8
Sun 02:01 PM...06...00...00...EVA-4: Cleanup and airlock ingress
Sun 02:46 PM...06...00...45...EVA-4: Airlock repressurization
Sun 02:56 PM...06...00...55...Spacesuit servicing
Sun 04:01 PM...06...02...00...LIOH and battery config
Sun 04:01 PM...06...02...00...EVA-5: Tool config
Sun 04:21 PM...06...02...20...Spacesuit swap
Sun 05:16 PM...06...03...15...EVA-5: Procedures review
Sun 08:31 PM...06...06...30...Crew sleep begins
Sun 09:41 PM...06...07...40...HST: SSR engineering playback
Sun 11:31 PM...06...09...30...HST: Bay 3 battery discharge

05/18/09
Mon 03:26 AM...06...13...25...HST: SSR engineering playback

Flight Day 8

Mon 04:31 AM...06...14...30...Crew wakeup
Mon 05:46 AM...06...15...45...EVA-5: Preparations begin
Mon 07:16 AM...06...17...15...EVA-5: Spacesuit purge
Mon 07:26 AM...06...17...25...EVA-5: Spacesuit pre-breathe
Mon 08:06 AM...06...18...05...EVA-5: Airlock depressurization
Mon 08:16 AM...06...18...15...EVA-5: Spacesuits to battery power
Mon 08:21 AM...06...18...20...EVA-5: Airlock egress and setup
Mon 08:46 AM...06...18...45...EVA-5: Bay 3 battery R&R
Mon 10:06 AM...06...20...05...HST: Battery aliveness test
Mon 10:16 AM...06...20...15...EVA-5: FGS-2 R&R
Mon 11:41 AM...06...21...40...HST: FGS-2 aliveness test
Mon 12:16 PM...06...22...15...EVA-5: NOBL 5
Mon 12:46 PM...06...22...45...EVA-5: Cleanup and airlock ingress
Mon 01:46 PM...06...23...45...HST high gain antenna deploy (1)
Mon 01:56 PM...06...23...55...EVA-5: Airlock repressurization
Mon 02:11 PM...07...00...10...Spacesuit servicing
Mon 02:21 PM...07...00...20...HST: Solar arrays slewed to 90 degrees
Mon 02:41 PM...07...00...40...HST: Battery functional test
Mon 03:16 PM...07...01...15...LIOH and battery config
Mon 03:36 PM...07...01...35...Spacesuit swap
Mon 04:11 PM...07...02...10...HST high gain antenna deploy (2)
Mon 04:21 PM...07...02...20...Rendezvous tools checkout
Mon 04:46 PM...07...02...45...HST: FGS-2 functional test
Mon 08:31 PM...07...06...30...Crew sleep begins
Mon 09:41 PM...07...07...40...HST: SSR engineering playback

Flight Day 9

05/19/09
Tue 03:26 AM...07...13...25...HST: SSR engineering playback
Tue 04:31 AM...07...14...30...Crew wakeup
Tue 06:01 AM...07...16...00...Group B computer powerup
Tue 06:16 AM...07...16...15...SRMS grapples HST
Tue 06:56 AM...07...16...55...HST power umbilical disconnect
Tue 07:06 AM...07...17...05...HST unberthing maneuver
Tue 07:36 AM...07...17...35...EVA prep
Tue 07:51 AM...07...17...50...HST release prep
Tue 08:16 AM...07...18...15...HST: Aperture door open
Tue 08:53 AM...07...18...52...HST release
Tue 08:54 AM...07...18...53...Separation burn No. 1
Tue 09:27 AM...07...19...26...Separation burn No. 2
Tue 09:51 AM...07...19...50...FSS stow
Tue 10:11 AM...07...20...10...Crew meals
Tue 11:02 AM...07...21...01...Orbit adjust rocket firing
Tue 11:11 AM...07...21...10...Group B computer powerdown
Tue 11:11 AM...07...21...10...SRMS unberths OBSS
Tue 12:51 PM...07...22...50...Starboard wing RCC survey
Tue 02:31 PM...08...00...30...EVA tools stowed
Tue 02:41 PM...08...00...40...Nose cap survey
Tue 03:31 PM...08...01...30...Port wing RCC survey
Tue 04:31 PM...08...02...30...HST: 2nd ARU attitude
Tue 05:51 PM...08...03...50...OBSS ICC RCC survey
Tue 06:31 PM...08...04...30...LDRI downlinkn
Tue 08:31 PM...08...06...30...Crew sleep begins

Flight Day 10

05/20/09
Wed 04:31 AM...08...14...30...Crew wakeup
Wed 07:16 AM...08...17...15...SRMS OBSS stow
Wed 08:16 AM...08...18...15...SRMS powerdown
Wed 08:31 AM...08...18...30...Crew off duty
Wed 10:16 AM...08...20...15...Crew news conference
Wed 10:56 AM...08...20...55...Joint crew meal
Wed 11:56 AM...08...21...55...Shuttle-to-ISS call
Wed 12:11 PM...08...22...10...Crew off duty
Wed 08:01 PM...09...06...00...Crew sleep begins

Flight Day 11

05/21/09
Thu 04:01 AM...09...14...00...Crew wakeup
Thu 07:01 AM...09...17...00...Cabin stow begins
Thu 07:11 AM...09...17...10...Flight control system checkout
Thu 08:21 AM...09...18...20...RCS hotfire
Thu 08:36 AM...09...18...35...PILOT landing practice
Thu 10:06 AM...09...20...05...Deorbit review
Thu 10:36 AM...09...20...35...Joint crew meal
Thu 11:36 AM...09...21...35...Cabin stow resumes
Thu 12:36 PM...09...22...35...Crew photo
Thu 12:16 PM...09...22...15...PAO event
Thu 11:46 AM...09...21...45...L-1 comm check
Thu 02:01 PM...10...00...00...PAO event
Thu 02:21 PM...10...00...20...Entry video setup
Thu 02:41 PM...10...00...40...Wing leading edge sensor system deactivation
Thu 04:01 PM...10...02...00...PGSC stow (part 1)
Thu 04:01 PM...10...02...00...KU antenna stow
Thu 04:01 PM...10...02...00...Ergometer stow
Thu 07:31 PM...10...05...30...Crew sleep begins

Flight Day 12

05/22/09
Fri 03:31 AM...10...13...30...Crew wakeup
Fri 05:46 AM...10...15...45...Group B computer powerup
Fri 06:01 AM...10...16...00...IMU alignment
Fri 06:16 AM...10...16...15...PGSC stow (part 2)
Fri 06:36 AM...10...16...35...Deorbit timeline begins
Fri 10:35 AM...10...20...34...Deorbit ignition (orbit 166)
Fri 11:41 AM...10...21...40...Landing