Apollo 15 Timeline

 

 

Event

GET

(hhh:mm:ss)

GMT

Time

GMT

Date

Terminal countdown started.

-028:00:00

23:00:00

24 Jul 1971

Scheduled 9-hour 34-minute hold at T-9 hours.

-009:00:00

18:00:00

25 Jul 1971

Countdown resumed at T-9 hours.

-009:00:00

03:34:00

26 Jul 1971

Scheduled 1-hour hold at T-3 hours 30 minutes.

-003:30:00

09:04:00

26 Jul 1971

Countdown resumed at T-3 hours 30 minutes.

-003:30:00

10:04:00

26 Jul 1971

Guidance reference release.

-000:00:16.939

13:33:43

26 Jul 1971

S-IC engine start command.

-000:00:08.9

13:33:51

26 Jul 1971

S-IC engine ignition (#5).

-000:00:06.50

13:33:53

26 Jul 1971

All S-IC engines thrust OK.

-000:00:01.4

13:33:58

26 Jul 1971

Range zero.

000:00:00.00

13:34:00

26 Jul 1971

All holddown arms released (1st motion) (1.08 g).

000:00:00.3

13:34:00

26 Jul 1971

Liftoff (umbilical disconnected).

000:00:00.58

13:34:00

26 Jul 1971

Tower clearance yaw maneuver started.

000:00:01.68

13:34:01

26 Jul 1971

Yaw maneuver ended.

000:00:09.66

13:34:09

26 Jul 1971

Pitch and roll maneuver started.

000:00:12.21

13:34:12

26 Jul 1971

Roll maneuver ended.

000:00:23.02

13:34:23

26 Jul 1971

Mach 1 achieved.

000:01:05.0

13:35:05

26 Jul 1971

Maximum bending moment (80,000,000 lbf-in).

000:01:20.1

13:35:20

26 Jul 1971

Maximum dynamic pressure (768.58 lb/ft2).

000:01:22.0

13:35:22

26 Jul 1971

S-IC center engine cutoff command.

000:02:15.96

13:36:16

26 Jul 1971

Pitch maneuver ended.

000:02:36.94

13:36:36

26 Jul 1971

S-IC outboard engine cutoff. Maximum total inertial acceleration (3.97 g).

000:02:39.56

13:36:39

26 Jul 1971

S-IC maximum Earth-fixed velocity.

000:02:40.00

13:36:40

26 Jul 1971

S-IC/S-II separation command.

000:02:41.2

13:36:41

26 Jul 1971

S-II engine start command.

000:02:41.9

13:36:41

26 Jul 1971

S-II ignition.

000:02:43.0

13:36:43

26 Jul 1971

S-II aft interstage jettisoned.

000:03:11.2

13:37:11

26 Jul 1971

Launch escape tower jettisoned.

000:03:15.9

13:37:15

26 Jul 1971

Iterative guidance mode initiated.

000:03:22.62

13:37:22

26 Jul 1971

S-IC apex.

000:04:37.562

13:38:37

26 Jul 1971

S-II maximum total inertial acceleration (1.79 g). S-II center engine cutoff.

000:07:39.56

13:41:39

26 Jul 1971

S-II outboard engine cutoff.

000:09:09.06

13:43:09

26 Jul 1971

S-II maximum Earth-fixed velocity.

000:09:10.00

13:43:10

26 Jul 1971

S-II/S-IVB separation command.

000:09:10.1

13:43:10

26 Jul 1971

S-IVB 1st burn start command.

000:09:10.20

13:43:10

26 Jul 1971

S-IVB 1st burn ignition.

000:09:13.20

13:43:13

26 Jul 1971

S-II apex.

000:09:13.225

13:43:13

26 Jul 1971

S-IC impact (theoretical).

000:09:20.839

13:43:20

26 Jul 1971

S-IVB ullage case jettisoned.

000:09:21.8

13:43:21

26 Jul 1971

S-IVB 1st burn maximum total inertial acceleration (0.65 g). S-IVB 1st burn cutoff.

000:11:34.67

13:45:34

26 Jul 1971

Earth orbit insertion. S-IVB 1st burn maximum Earth-fixed velocity.

000:11:44.67

13:45:44

26 Jul 1971

Orbital navigation started.

000:11:56.3

13:45:56

26 Jul 1971

Maneuver to local horizontal attitude started.

000:13:15.7

13:47:15

26 Jul 1971

S-II impact (theoretical).

000:19:43.912

13:53:43

26 Jul 1971

S-IVB 2nd burn restart preparation.

002:40:24.80

16:14:24

26 Jul 1971

S-IVB 2nd burn restart command.

002:49:54.90

16:23:54

26 Jul 1971

S-IVB 2nd burn ignition.

002:50:02.90

16:24:02

26 Jul 1971

S-IVB 2nd burn cutoff and maximum total inertial acceleration (1.40 g).

002:55:53.61

16:29:53

26 Jul 1971

S-IVB 2nd burn maximum Earth-fixed velocity.

002:55:54.00

16:29:54

26 Jul 1971

Translunar injection.

002:56:03.61

16:30:03

26 Jul 1971

Orbital navigation started.

002:58:26.0

16:32:26

26 Jul 1971

Maneuver to local horizontal attitude started.

002:58:26.2

16:32:26

26 Jul 1971

Maneuver to transposition and docking attitude started.

003:10:54.6

16:44:54

26 Jul 1971

CSM separated from S-IVB.

003:22:27.2

16:56:27

26 Jul 1971

TV transmission started.

003:25

16:34

26 Jul 1971

CSM docked with LM/S-IVB.

003:33:49.5

17:07:49

26 Jul 1971

TV transmission ended.

003:50

16:34

26 Jul 1971

CSM/LM ejected from S-IVB.

004:18:01.2

17:52:01

26 Jul 1971

S-IVB APS evasive maneuver ignition.

004:40:01.8

18:14:01

26 Jul 1971

S-IVB APS evasive maneuver cutoff.

004:41:22.0

18:15:22

26 Jul 1971

Maneuver to S-IVB LOX dump attitude initiated.

004:49:41.8

18:23:41

26 Jul 1971

S-IVB lunar impact maneuver - CVS venting closed.

004:56:40.6

18:30:40

26 Jul 1971

 S-IVB lunar impact maneuver - LOX dump. Start of unplanned velocity increment due to J-2

   engine control helium dump.

 

005:01:20.6

 

18:35:20

 

26 Jul 1971

S-IVB lunar impact maneuver - CVS vent opened.

005:01:40.6

18:35:40

26 Jul 1971

S-IVB lunar impact maneuver - LOX dump ended.

005:02:08.7

18:36:08

26 Jul 1971

S-IVB lunar impact maneuver - J-2 engine control helium dump ended.

005:18:51

18:52:51

26 Jul 1971

Maneuver to attitude required for final S-IVB APS burn initiated.

005:27:13.5

19:01:13

26 Jul 1971

S-IVB lunar impact maneuver - 1st APS ignition.

005:46:00.7

19:20:00

26 Jul 1971

S-IVB lunar impact maneuver - 1st APS cutoff.

005:52:01.9

19:26:01

26 Jul 1971

S-IVB lunar impact maneuver - Start of 1st unplanned velocity increment due to instrument

   unit thermal control system water valve operations and APS attitude engine reactions.

 

006:18:00

 

19:52:00

 

26 Jul 1971

S-IVB lunar impact maneuver - End of 1st velocity increment due to IU/TCS and APS effects.

006:23:00

19:57:00

26 Jul 1971

S-IVB lunar impact maneuver - Start of 2nd velocity increment due to IU/TCS and APS

   effects.

 

006:58:00

 

20:32:00

 

26 Jul 1971

S-IVB lunar impact maneuver - End of 2nd velocity increment due to IU/TCS and APS effects.

007:03:00

20:37:00

26 Jul 1971

S-IVB lunar impact maneuver - Start of 3rd velocity increment due to IU/TCS and APS effects.

007:38:00

21:12:00

26 Jul 1971

S-IVB lunar impact maneuver - End of 3rd velocity increment due to IU/TCS and APS effects.

007:43:00

21:17:00

26 Jul 1971

S-IVB lunar impact maneuver - Start of 4th velocity increment due to IU/TCS and APS effects.

008:18:00

21:52:00

26 Jul 1971

S-IVB lunar impact maneuver - End of 4th velocity increment due to IU/TCS and APS effects.

008:23:00

21:57:00

26 Jul 1971

S-IVB lunar impact maneuver - Start of 5th velocity increment due to IU/TCS and APS effects.

008:53:00

22:27:00

26 Jul 1971

S-IVB lunar impact maneuver - End of 5th velocity increment due to IU/TCS and APS effects.

008:58:00

22:32:00

26 Jul 1971

S-IVB lunar impact maneuver - Start of 6th velocity increment due to IU/TCS and APS effects.

009:28:00

23:02:00

26 Jul 1971

S-IVB lunar impact maneuver - End of 6th velocity increment due to IU/TCS and APS effects.

009:33:00

23:07:00

26 Jul 1971

S-IVB lunar impact maneuver - 2nd APS ignition.

010:00:01

23:34:01

26 Jul 1971

S-IVB lunar impact maneuver - 2nd APS cutoff.

010:01:12

23:35:12

26 Jul 1971

S-IVB 0.3° per second solar heating avoidance roll command.

010:19:22

23:53:22

26 Jul 1971

Midcourse correction ignition.

028:40:22.0

18:14:22

27 Jul 1971

Midcourse correction cutoff.

028:40:22.8

18:14:22

27 Jul 1971

Sextant photography test started.

032:00

21:34

27 Jul 1971

Sextant photography test ended.

032:50

22:24

27 Jul 1971

Preparations for LM ingress.

033:25

22:59

27 Jul 1971

CDR and LMP entered LM for checkout.

033:56

23:30

27 Jul 1971

TV transmission of CM and LM interiors started.

034:55

00:29

28 Jul 1971

TV transmission of CM and LM interiors ended.

035:46

01:20

28 Jul 1971

CDR and LMP entered CM.

036:55

02:29

28 Jul 1971

Visual light flash phenomenon observations started.

051:37

17:11

28 Jul 1971

Visual light flash phenomenon observations ended.

052:33

18:07

28 Jul 1971

LM housekeeping.

056:26

22:00

28 Jul 1971

LM ingress and housekeeping.

056:26

22:00

28 Jul 1971

CDR and LMP entered LM for checkout.

057:00

22:34

28 Jul 1971

CDR and LMP entered CM.

058:00

23:34

28 Jul 1971

Equigravisphere.

063:55:20

05:29:20

29 Jul 1971

Midcourse correction ignition.

073:31:14.81

15:05:14

29 Jul 1971

Midcourse correction cutoff.

073:31:15.72

15:05:15

29 Jul 1971

Scientific instrument module door jettisoned.

074:06:47.1

15:40:47

29 Jul 1971

Lunar orbit insertion ignition (SPS).

078:31:46.70

20:05:46

29 Jul 1971

Lunar orbit insertion cutoff.

078:38:25.06

20:12:25

29 Jul 1971

S-IVB impact on lunar surface.

079:24:42.9

20:58:42

29 Jul 1971

Orbital science photography started.

080:35

22:09

29 Jul 1971

Orbital science photography ended.

080:50

22:24

29 Jul 1971

Terminator photography.

082:00

23:34

29 Jul 1971

Descent orbit insertion ignition (SPS).

082:39:49.09

00:13:49

30 Jul 1971

Descent orbit insertion cutoff.

082:40:13.62

00:14:13

30 Jul 1971

CSM landmark tracking.

083:45

01:19

30 Jul 1971

Terminator photography.

084:35

02:09

30 Jul 1971

TV transmission of landing site started.

095:00

12:34

30 Jul 1971

TV transmission of landing site ended.

095:10

12:44

30 Jul 1971

Descent orbit trim ignition (RCS).

095:56:44.70

13:30:44

30 Jul 1971

Descent orbit trim cutoff.

095:57:15.10

13:31:15

30 Jul 1971

CDR and LMP entered LM for activation, checkout, and platform alignment.

098:00

15:34

30 Jul 1971

CM/LM undocking failure due to loose CM/LM umbilical.

100:14

17:48

30 Jul 1971

LM undocking and separation.

100:39:16.2

18:13:16

30 Jul 1971

CSM orbit circularization ignition (SPS).

101:38:58.98

19:12:59

30 Jul 1971

CSM orbit circularization cutoff.

101:39:02.65

19:13:02

30 Jul 1971

CSM lunar surface landmark tracking.

102:35

20:09

30 Jul 1971

LM landing radar on.

104:25:13.0

21:59:13

30 Jul 1971

LM powered descent engine ignition.

104:30:09.4

22:04:09

30 Jul 1971

LM throttle to full-throttle position.

104:30:35.9

22:04:35

30 Jul 1971

LM manual target (landing site) update.

104:31:44.2

22:05:44

30 Jul 1971

LM pitchover started.

104:33:10.4

22:07:10

30 Jul 1971

LM landing radar range data good.

104:33:26.2

22:07:26

30 Jul 1971

LM landing radar altitude data good.

104:33:38.2

22:07:38

30 Jul 1971

LM landing radar updates enabled.

104:33:50.2

22:07:50

30 Jul 1971

LM throttle down.

104:37:31.1

22:11:31

30 Jul 1971

LM approach phase program selected.

104:39:32.2

22:13:32

30 Jul 1971

LM landing radar antenna to position 2.

104:39:39.0

22:13:39

30 Jul 1971

LM 1st landing point redesignation.

104:39:40.0

22:13:40

30 Jul 1971

LM landing radar switched to low scale.

104:40:13.0

22:14:13

30 Jul 1971

LM attitude hold mode selected.

104:41:08.7

22:15:08

30 Jul 1971

LM landing phase program selected.

104:41:10.2

22:15:10

30 Jul 1971

LM powered descent engine cutoff.

104:42:28.6

22:16:28

30 Jul 1971

LM lunar landing (right side and forward footpad contact).

104:42:29.3

22:16:29

30 Jul 1971

LM final settling.

104:42:31.1

22:16:31

30 Jul 1971

CSM orbital science photography.

106:00

23:34

30 Jul 1971

Stand-up EVA started (Scott).

106:42:49

00:16:49

31 Jul 1971

Stand-up EVA ended.

107:15:56

00:49:56

31 Jul 1971

CSM orbital science photography.

108:00

01:34

31 Jul 1971

CSM orbital science photography.

108:40

02:14

31 Jul 1971

CSM bistatic radar test.

110:00

03:34

31 Jul 1971

1st EVA started (LM cabin depressurized).

119:39:17

13:13:17

31 Jul 1971

TV transmission started for 1st EVA.

119:52:45

13:26:45

31 Jul 1971

Contingency sample collected.

120:00:05

13:34:05

31 Jul 1971

Lunar rover vehicle (LRV) offloaded.

120:18:31

13:52:31

31 Jul 1971

LRV deployed.

120:31:33

14:05:33

31 Jul 1971

LRV configured for traverse.

121:24:03

14:58:03

31 Jul 1971

Departed for station 1.

121:44:55

15:18:55

31 Jul 1971

Arrived at station 1. Performed radial sampling, gathered documented samples, and performed

   panoramic photography.

 

122:10:46

 

15:44:46

 

31 Jul 1971

Departed for station 2.

122:22:36

15:56:36

31 Jul 1971

Arrived at station 2. Gathered samples, obtained a double core tube sample and performed

   stereopanoramic and 500 mm photography.

 

122:34:44

 

16:08:44

 

31 Jul 1971

CSM deep space measurements.

122:40

16:14

31 Jul 1971

CSM sunrise solar corona photography.

123:05

16:39

31 Jul 1971

Departed for LM.

123:26:02

17:02

31 Jul 1971

Arrived at LM. Offloaded and deployed Apollo lunar surface experiment package (ALSEP),

   laser ranging retroreflector, and solar wind composition experiment.

 

123:59:39

 

17:33:39

 

31 Jul 1971

CSM sunset solar corona photography.

124:30

18:04

31 Jul 1971

CSM lunar libration photography.

125:00

18:34

31 Jul 1971

1st ALSEP data received on Earth.

125:18:00

18:52

31 Jul 1971

TV transmission ended for 1st EVA.

125:55

19:29

31 Jul 1971

Cold cathode gage experiment turned on. CSM orbital science photography.

126:00

19:34

31 Jul 1971

1st EVA ended (cabin repressurized).

126:11:59

19:45:59

31 Jul 1971