Apollo 8 Timeline

 

 

Event

GET

(hhh:mm:ss)

GMT

Time

GMT

Date

Countdown started.

-103:00:00

00:00:00

16 Dec 1968

Terminal countdown started.

-028:00:00

01:51:00

20 Dec 1968

Scheduled 6-hour hold at T-9 hours.

-009:00:00

20:51:00

20 Dec 1968

Countdown resumed at T-9 hours.

-009:00:00

02:51:00

21 Dec 1968

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

-003:30:00

08:21:00

21 Dec 1968

Countdown resumed at T-3 hours 30 minutes.

-003:30:00

09:21:00

21 Dec 1968

Crew ingress.

-002:53

09:58

21 Dec 1968

Guidance reference release.

-000:00:16.970

12:50:43

21 Dec 1968

S-IC engine start command.

-000:00:08.89

12:50:51

21 Dec 1968

S-IC engine ignition (#5).

-000:00:06.585

12:50:53

21 Dec 1968

All S-IC engines thrust OK.

-000:00:01.387

12:50:58

21 Dec 1968

Range zero.

000:00:00.00

12:51:00

21 Dec 1968

All holddown arms released.

000:00:00.27

12:51:00

21 Dec 1968

1st motion (1.16 g).

000:00:00.33

12:51:00

21 Dec 1968

Liftoff (umbilical disconnected).

000:00:00.67

12:51:00

21 Dec 1968

Tower clearance yaw maneuver started.

000:00:01.76

12:51:01

21 Dec 1968

Yaw maneuver ended.

000:00:09.72

12:51:09

21 Dec 1968

Pitch and roll maneuver started.

000:00:12.11

12:51:12

21 Dec 1968

Roll maneuver ended.

000:00:31.52

12:51:31

21 Dec 1968

Mach 1 achieved.

000:01:01.48

12:52:01

21 Dec 1968

Maximum bending moment achieved (60,000,000 lbf-in).

000:01:14.7

12:52:14

21 Dec 1968

Maximum dynamic pressure (776.938 lb/ft2).

000:01:18.9

12:52:18

21 Dec 1968

S-IC center engine cutoff command.

000:02:05.93

12:53:05

21 Dec 1968

Pitch maneuver ended.

000:02:25.50

12:53:25

21 Dec 1968

S-IC outboard engine cutoff.

000:02:33.82

12:53:33

21 Dec 1968

S-IC maximum total inertial acceleration (3.96 g).

000:02:33.92

12:53:33

21 Dec 1968

S-IC maximum Earth-fixed velocity; S-IC/S-II separation command

000:02:34.47

12:53:34

21 Dec 1968

S-II engine start command.

000:02:35.19

12:53:35

21 Dec 1968

S-II ignition.

000:02:36.19

12:53:36

21 Dec 1968

S-II aft interstage jettisoned.

000:03:04.47

12:54:04

21 Dec 1968

Launch escape tower jettisoned.

000:03:08.6

12:54:08

21 Dec 1968

Iterative guidance mode initiated.

000:03:16.22

12:54:16

21 Dec 1968

S-IC apex.

000:04:26.54

12:55:26

21 Dec 1968

S-II engine cutoff.

000:08:44.04

12:59:44

21 Dec 1968

S-II maximum total inertial acceleration (1.86 g).

000:08:44.14

12:59:44

21 Dec 1968

S-II maximum Earth-fixed velocity; S-II/S-IVB separation command.

000:08:44.90

12:59:44

21 Dec 1968

S-IVB 1st burn start command.

000:08:45.00

12:59:45

21 Dec 1968

S-IVB 1st burn ignition.

000:08:48.29

12:59:48

21 Dec 1968

S-IVB ullage case jettisoned.

000:08:56.8

12:59:56

21 Dec 1968

S-IC impact (theoretical).

000:09:00.41

13:00:00

21 Dec 1968

S-II apex.

000:09:20.34

13:00:20

21 Dec 1968

S-IVB 1st burn cutoff.

000:11:24.98

13:02:25

21 Dec 1968

S-IVB 1st burn maximum total inertial acceleration (0.72 g).

000:11:25.08

13:02:25

21 Dec 1968

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

000:11:25.50

13:02:25

21 Dec 1968

Earth orbit insertion.

000:11:34.98

13:02:35

21 Dec 1968

Maneuver to local horizontal attitude started.

000:11:45.19

13:02:45

21 Dec 1968

Orbital navigation started.

000:13:05.19

13:04:05

21 Dec 1968

S-II impact (theoretical).

000:19:25.106

13:10:25

21 Dec 1968

Optics cover jettisoned.

000:42:05

13:33:05

21 Dec 1968

All spacecraft systems approved for translunar injection.

001:56:00

14:47:00

21 Dec 1968

CAPCOM (Mike Collins): "All right, Apollo 8. You are go for TLI."

002:27:22

15:18:22

21 Dec 1968

S-IVB 2nd burn restart preparation.

002:40:59.54

15:31:59

21 Dec 1968

S-IVB 2nd burn restart command.

002:50:29.51

15:41:29

21 Dec 1968

S-IVB 2nd burn ignition.

002:50:37.79

15:41:37

21 Dec 1968

S-IVB 2nd burn cutoff.

002:55:55.51

15:46:55

21 Dec 1968

S-IVB 2nd burn maximum total inertial acceleration (1.55 g).

002:55:55.61

15:46:55

21 Dec 1968

S-IVB LH2 tank latch relief valve open.

002:55:55.91

15:46:55

21 Dec 1968

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

002:55:56.00

15:46:56

21 Dec 1968

S-IVB LH2 tank CVS valve open/ S-IVB safing procedures started.

002:55:56.19

15:46:56

21 Dec 1968

S-IVB LOX tank non-propulsive vent valve open.

002:55:56.42

15:46:56

21 Dec 1968

Translunar injection.

002:56:05.51

15:47:05

21 Dec 1968

Maneuver to local horizontal attitude and orbital navigation started.

002:56:15.77

15:47:15

21 Dec 1968

S-IVB LOX tank non-propulsive vent valve closed.

002:58:26.39

15:49:26

21 Dec 1968

S-IVB LH2 tank CVS valve and tank relief valve closed.

003:10:55.71

16:01:55

21 Dec 1968

Maneuver to transposition and docking attitude started.

003:10:58.40

16:01:58

21 Dec 1968

Sequence to separate CSM from S-IVB/LTA started. High-gain antenna    deployed.

003:20:56.3

16:11:56

21 Dec 1968

CSM separated from S-IVB.

003:20:59.3

16:11:59

21 Dec 1968

1st CSM evasive maneuver from S-IVB (RCS).

003:40:01

16:31:01

21 Dec 1968

S-IVB LH2 tank latch relief valve open.

003:55:56.16

16:46:56

21 Dec 1968

S-IVB LH2 tank latch relief valve closed.

004:10:55.77

17:01:55

21 Dec 1968

Last reported VHF uplink reception.

004:39:54

17:30:54

21 Dec 1968

S-IVB lunar slingshot attitude maneuver initiated.

004:44:56.63

17:35:56

21 Dec 1968

2nd CSM evasive maneuver from S-IVB (RCS).

004:45:01

17:36:01

21 Dec 1968

Last reported VHF downlink reception.

004:48

17:39

21 Dec 1968

S-IVB lunar slingshot maneuver - LH2 tank CVS vent valve open command.

004:55:56.02

17:46:56

21 Dec 1968

S-IVB lunar slingshot maneuver - LOX dump started.

005:07:55.82

17:58:55

21 Dec 1968

S-IVB lunar slingshot maneuver - Apply velocity change.

005:07:56.03

17:58:56

21 Dec 1968

S-IVB start bottle vent dump start.

005:08:25.82

17:59:25

21 Dec 1968

S-IVB start bottle vent dump end.

005:10:55.83

18:01:55

21 Dec 1968

S-IVB pneumatic sphere dump start.

005:12:25.83

18:03:25

21 Dec 1968

S-IVB LOX dump end.

005:12:55.82

18:03:55

21 Dec 1968

S-IVB lunar slingshot maneuver - LOX dump ended.

005:12:56.03

18:03:56

21 Dec 1968

S-IVB LOX tank non-propulsive vent valve open.

005:12:59.0

18:03:59

21 Dec 1968

S-IVB LH2 tank latch relief valve open.

005:13:01.23

18:04:01

21 Dec 1968

S-IVB cold helium dump start.

005:13:03.6

18:04:03

21 Dec 1968

S-IVB lunar slingshot maneuver - APS ignition.

005:25:55.85

18:16:55

21 Dec 1968

S-IVB lunar slingshot maneuver - APS cutoff.

005:38:08.56

18:29:08

21 Dec 1968

S-IVB lunar slingshot maneuver - APS depletion.

005:38:34.00

18:29:34

21 Dec 1968

S-IVB cold helium dump end.

006:03:03.5

18:54:03

21 Dec 1968

S-IVB pneumatic sphere dump end.

006:11:05.88

19:02:05

21 Dec 1968

1st use of high gain antenna.

006:33:04

19:24:04

21 Dec 1968

Midcourse correction ignition.

010:59:59.2

23:50:59

21 Dec 1968

Midcourse correction cutoff.

011:00:01.6

23:51:01

21 Dec 1968

Data processing by missions operations computer and backup computer lost

   for ten minutes due to undesirable instruction sequence.

 

011:51:00

 

00:42:00

 

22 Dec 1968

S-band mode testing started.

012:03:01

00:54:01

22 Dec 1968

1st television transmission started.

031:10:36

20:01:36

22 Dec 1968

1st television transmission ended.

031:24:13

20:15:13

22 Dec 1968

2nd television transmission started.

055:02:45

19:53:45

23 Dec 1968

2nd television transmission ended.

055:28:23

20:19:23

23 Dec 1968

Equigravisphere.

055:38

20:29

23 Dec 1968

Midcourse correction ignition.

060:59:55.9

01:50:55

24 Dec 1968

Midcourse correction cutoff.

061:00:07.8

01:51:07

24 Dec 1968

CAPCOM (Jerry Carr): "Apollo 8, this is Houston. At 68:04, you are go for LOI."

068:04:07

08:55:07

24 Dec 1968

CAPCOM: "Apollo 8, Houston. One minute to LOS. All systems go."

068:57:06

09:48:00

24 Dec 1968

CAPCOM: "Safe journey, guys."

068:57:19

09:48:19

24 Dec 1968

LMP (Anders): "Thanks a lot, troops."

068:57:24

09:48:24

24 Dec 1968

CMP (Lovell): "We'll see you on the other side."

068:57:26

09:48:26

24 Dec 1968

CAPCOM: "Apollo 8, 10 seconds to go. You're go all the way."

068:57:54

09:48:54

24 Dec 1968

CDR (Borman): "Roger."

068:58:00

09:49:00

24 Dec 1968

Lunar orbit insertion ignition.

069:08:20.4

09:59:20

24 Dec 1968

Lunar orbit insertion cutoff.

069:12:27.3

10:03:27

24 Dec 1968

CAPCOM: "Apollo 8, Houston. Over."

069:33:44

10:24:44

24 Dec 1968

CMP: "Go ahead, Houston. This is Apollo 8. Burn complete..."

069:33:52

10:24:52

24 Dec 1968

CAPCOM: "Apollo 8, this is Houston. Roger...good to hear your voice."

069:34:07

10:25:07

24 Dec 1968

S-IVB closest approach to lunar surface.

069:58:55.2

10:49:55

24 Dec 1968

Control point sightings.

071:00

11:51

24 Dec 1968

16 mm camera photography started.

071:10

12:01

24 Dec 1968

3rd television transmission started.

071:40:52

12:31:52

24 Dec 1968

3rd television transmission ended.

071:52:52

12:43:52

24 Dec 1968

Pseudo-landing site sightings.

071:55

12:46

24 Dec 1968

16 mm photography stopped.

072:20

13:11

24 Dec 1968

Lunar orbit circularization ignition.

073:35:06.6

14:26:06

24 Dec 1968

Lunar orbit circularization cutoff.

073:35:16.2

14:26:16

24 Dec 1968

Training photography.

074:00

14:51

24 Dec 1968

CSM landmark tracking and photography.

074:15

15:06

24 Dec 1968

Stereo photography started.

075:20

16:11

24 Dec 1968

Stereo photography ended.

076:00

16:51

24 Dec 1968

Landmark lighting evaluation.

076:15

17:06

24 Dec 1968

Control point sightings.

077:20

18:11

24 Dec 1968

Pseudo-landing site sightings.

078:00

18:51

24 Dec 1968

Control point sightings.

079:20

20:11

24 Dec 1968

Pseudo-landing site sightings.

080:00

20:51

24 Dec 1968

Control point sightings.

081:20

22:11

24 Dec 1968

Pseudo-landing site sightings.

082:00

22:51

24 Dec 1968

4th television transmission started.

085:43:03

02:34:03

25 Dec 1968

LMP: "We are now approaching the lunar sunrise, and for all the people back on

    Earth, the  crew of Apollo 8 has a message that we would like to send to you. In

    the beginning..." (reading from the Bible).

 

 

086:06:56

 

 

02:57:56

 

 

25 Dec 1968

CMP: "And God called the light Day..."

086:07:29

02:58:29

25 Dec 1968

CDR: "And from the crew of Apollo 8, we close with good night, good luck, a

    merry Christmas, and God bless all of you, all of you on the good Earth."

 

086:08:36

 

02:59:36

 

25 Dec 1968

4th television transmission ended.

086:09:46

03:00:46

25 Dec 1968

Maneuver to transearth injection attitude.

087:15

04:06

25 Dec 1968

CAPCOM: (Ken Mattingly) "Okay, Apollo 8...you have a go for TEI."

088:03:36

04:54:36

24 Dec 1968

Transearth injection ignition (SPS).

089:19:16.6

06:10:16

25 Dec 1968

Transearth injection cutoff.

089:22:40.3

06:13:40

25 Dec 1968

Two-way communication phaselock established, but no voice or telemetry.

089:28:47

06:19:47

25 Dec 1968

Two-way voice synchronization established.

089:33:28

06:24:28

25 Dec 1968

CMP: "Houston, Apollo 8, over."

089:34:16

06:25:16

25 Dec 1968

CAPCOM: "Hello, Apollo 8. Loud and clear."

089:34:19

06:25:19

25 Dec 1968

CMP: "Roger. Please be informed there IS a Santa Claus."

089:34:25

06:25:25

25 Dec 1968

CAPCOM: "That's affirmative. You are the best ones to know."

089:34:31

06:25:31

25 Dec 1968

Two-way telemetry synchronization established.

089:43:00

06:34:00

25 Dec 1968

Midcourse correction ignition.

104:00:00

20:51:00

25 Dec 1968

Midcourse correction cutoff.

104:00:15

20:51:15

25 Dec 1968

5th television transmission started.

104:24:04

21:15:04

25 Dec 1968

5th television transmission ended.

104:33:35

21:24:35

25 Dec 1968

Onboard state vector and platform alignment data corrupted due to crew error.

106:26

23:17

25 Dec 1968

State vector and platform alignment data corrected.

106:45

23:36

25 Dec 1968

Test of high-gain antenna automatic acquisition.

110:16:55

03:07:55

26 Dec 1968

6th television transmission started.

127:45:33

20:36:33

26 Dec 1968

6th television transmission ended.

128:05:27

20:56:27

26 Dec 1968

1st reception of ground VHF during transearth coast.

142:16:00

11:07:00

27 Dec 1968

CM/SM separation.

146:28:48.0

15:19:48

27 Dec 1968

Entry.

146:46:12.8

15:37:12

27 Dec 1968

Communication blackout started.

146:46:37

15:37:37

27 Dec 1968

Maximum entry g force (6.84 g).

146:47:38.4

15:38:38

27 Dec 1968

Recovery aircraft received direction-finding signals from CM and established visual

   contact.

 

146:49

 

15:40

 

27 Dec 1968

Radar contact with CM established by recovery ship at 270 nautical miles.

146:50

15:41

27 Dec 1968

Radar contact with CM established by recovery ship at 109 nautical miles.

146:51

15:42

27 Dec 1968

Communication blackout ended.

146:51:42.0

15:42:42

27 Dec 1968

Radar contact with CM established by recovery ship at 60 nautical miles.

146:52

15:43

27 Dec 1968

Drogue parachute deployed

146:54:47.8

15:45:47

27 Dec 1968

Main parachute deployed.

146:55:38.9

15:46:38

27 Dec 1968

Voice contact established with CM by recovery helicopter. Recovery beacon signal

   contact established with CM by recovery aircraft.

 

146:56:01

 

15:47

 

27 Dec 1968

Flashing light on CM visible on recovery ship

146:57:05

15:48:05

27 Dec 1968

Splashdown.

147:00:42.0

15:51:42

27 Dec 1968

CM went to apex down position. Voice contact lost.

147:00:50

15:51:50

27 Dec 1968

CM returned to apex-up position.

147:07:45

15:58:45

27 Dec 1968

Swimmers deployed to CM.

147:44

16:35

27 Dec 1968

Flotation collar inflated.

148:07

16:58

27 Dec 1968

CM hatch opened.

148:12

17:03

27 Dec 1968

Crew in life raft.

148:15

17:06

27 Dec 1968

Crew aboard recovery helicopter.

148:23

17:14

27 Dec 1968

Crew aboard recovery ship.

148:29

17:20

27 Dec 1968

Recovery ship arrived at CM.

149:22

18:13

27 Dec 1968

CM aboard recovery ship.

149:29

18:20

27 Dec 1968

Deactivation of CM started at Ford Island, Hawaii.

200:09

21:00

29 Dec 1968

CM deactivation completed.

 

 

01 Jan 1969

CM arrived at contractor's facility in Downey, CA.

296:09

21:00

02 Jan 1969

 

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