.	Skylab 1 (orbital cluster)	Skylab 2 (1st crew)	.	Skylab 3 (2d crew)	.	Skylab 4 (3d crew)	.	Totals	.
.
Launch	14 May 1973 1:30 p.m. EDT	25 May 1973 9:00 a.m. EDT	.	28 July 1973 7:11 a.m. EDT	.	16 Nov. 1973 9:01 a.m. EST	.	.	.
Return	11 July 1979 12:37 p.m. EDT	22 June 1973 9:49 a.m. EDT		25 Sept. 1973 6:19 p.m. EDT		8 Feb. 1974 11:17 a.m. EDT		.
Vehicles	Saturn V SA- 513 (2 stages)	Saturn IB SA-206, CSM-116		Saturn IB SA-207, CSM-117		Saturn IB SA-208, CSM-118		.
Orbital inclination	50°	.		.		.		.
Orbital parameters (km)	431.5 X 433.7	.		.		.		.
Orbital period	93 min approx.	.		.		.		.
Mission duration	.	28 days 49 min		59 days 11 hr 9 min		84 days I hr 14 min		171 days 13 hr 12 min
Number of revolutions (manned)	.	404		858		1214		2476
Distance traveled (km, manned)	.	18 500 000		39 400 000		55 500 000		113 400 000
Crews
Commander	.	Capt. Charles Conrad, Jr., USN	.	Capt. Alan L. Bean, USN	.	Lt. Col. Gerald P. Carr, USMC	.	.	.
Scientist-Pilot		Cmdr. Joseph P. Kerwin, MC, USN		Owen K. Garriott, Ph.D.		Edward G. Gibson, Ph.D.
Pilot		Cmdr. Paul J. Weitz, USN		Maj. Jack R. Lousma, USMC		Lt. Col. William R. Pogue, USAF
.
Man-hour Utilization		Hours	%	Hours	%	Hours	%	Hours	%
.
Sleep, rest, off duty	.	675.6	34.9	1224.5	31.2	1846.5	30.5	3746.6	31.4
Experiments		392.2	20.2	1081.5	27.6	1563.2	25.8	3036.9	25.6
Pre-sleep, post-sleep, meals		477.1	24.7	975.7	24.9	1384.0	23.0	2836.8	23.8
Physical training, hygiene		56.2	2.9	202.2	5.2	384.5	6.4	642.9	5.4
Housekeeping		103.6	5.3	158.4	4.0	298.9	4.9	560.9	4.7
Other		232.5	12.0	279.7	7.1	571.4	9.4	1083.6	9.1
Totals		1937.2	.	3922.0	.	6048.5	.	11907.7	.
.
Experiment Performance		Hours	%	Hours	%	Hours	%	Hours	%
.
Solar astronomy		117.2	29.9	305.1	28.2	519.0	33.2	941.3	31.0
Life science		145.3	37.0	312.5	28.9	366.7	23.5	824.5	27.1
Earth resources		71.4	18.2	223.5	20.7	274.5	17.6	569.4	18.8
Astrophysics		36.6	9.4	103.8	9.6	133.8	8.6	274.2	9.0
Engineering & technology		12.1	3.1	117.4	10.9	83.0	5.3	212.5	7.0
Comet Kohoutek		.	.	.	.	156.0	10.0	156.0	5.1
Materials science		5.9	1.5	8.4	0.8	15.4	1.0	29.7	1.0
Student experiments		3.7	0.9	10.8	1.0	14.8	0.9	29.3	1.0
Totals		392.2	.	1081.5	.	1563.2	.	3036.9	.
.
Data Returned
.
Solar astronomy, frames	. .	28 739	.	24 942	.	73 366	.	127 047	.
Earth resources, frames		9 846		16 800		19 400		46 046
Earth resources, meters of tape		13 716		28 529		30 480		72 725
.
Extravehicular Activity		Standup 25 May 73 37 min	.	EVA 1, 6 Aug 73 6 hr 29 min	.	EVA 1, 22 Nov 73 6 hr 33 min	.	.	.
.		EVA 1, 7 Jun 73 3 hr 30 min		EVA 2, 24 Aug 73 4 hr 30 min		EVA 2, 25 Dec 73 7 hr 1 min
		EVA 2, 19 Jun 73 1 hr 44 min		EVA 3, 22 Sep 73 2 hr 45 min		EVA 3, 29 Dec 73 3 hr 28 min
		.		.		EVA 4, 8 Feb 74 5 hr 19 min
Totals		5 hr 51 min		13 hr 44 min		22 hr 21 min		41 hr 56 min

SOURCE: MSFC Skylab Mission Report-Saturn Workshop (NASA TM X 64814, Oct. 1974), P. 3-39; Roland W. Newkirk and Ivan D. Ertel, with Courtney G. Brooks, Skylab: A Chronology (NASA SP-4011, 1977), PP. 362-64.

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