Gemini 12

  1966-104A

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Shortly after the coelliptic burn it was discovered that the radar was not functioning. Aldrin used the sextant instead, bringing his rendezvous expertise to good use.

The Agena showed some possible PPS problems during ascent, so only SPS burns were made. The Agena also gave problems in the docked phase, with the docked spacecraft difficult to control in gyrocompass mode.

The tether experiment was repeated. This time the docking bar was fitted with a cap to retain the tether, so that the EVA clamp was not needed. The payload area in the adapter section carried an EVA work station. A reserve oxidizer tank was removed from the OAMS system to save weight.

Splashdown was at 24 35 N 69 57 W in the Atlantic.

GTA-12
Date	Time	Event	Orbit
1966 Nov 11	2046:33	Launch
	2049:06	BECO T+2:33	-5925 x 118 x 29.79
	2049:08	T+2:35 Staging
	2052:16	T+5:43 SECO	160 x 241 x 28.90
	2052:39	T+6:06 Stage 2 sep, 3s burn
	2052:40	Jettison radar and horizon sensor covers
	2052:42	Sep burn complete
	2053:16	IVAR 34s 7.6, -4.0, -0.9 m/s
	2053:31	Lateral burn 22s
	2053:50	IVAR off
	2053:53	T+7:20 OAMS off	88.87 161 x 270 x 28.87
	2059	CDR window cover jet
	2100	PLT window cover jet
	2136:13	T+0:49:40 NC1 Phase adjust 20m/s 1:28	89.55 228 x 270 x 28.90
	2200:55	T+1:14:22 NPC Plane adjust 2.5m/s	89.55 228 x 270 x 28.88
	2234:25	T+2:22:55 CSI Corr. Comb. mvr 2m/s 10s	89.68 230 x 281 x 28.88
	2309:27	PDH coelliptic NSR 15m/s 1:06	90.11 272 x 281 x 28.88
		Radar failure
	2352:21	T+3:05:47 TPI 7m/s	90.41 281 x 301 x 28.87
	2357:47	MC1
1966 Nov 12	0003:40	MC2
	0010:19	MC3
	0015:35	MC4
	0019:09	TPF	90.50 290 x 301 x 28.87
1966 Nov 12	0020	At 1.5km 5m/s
	0025	At 1 km 6m/s
1966 Nov 12	0032	T+3:46 M=3 rendezvous with TDA/Agena 5001R
	0100:02	Docked with TDA
	0117:55	Undocked
		Flyaround Agena
	0136:16	incomplete docking
	0137?	Undocking
	0153	GATV rolled 90 deg
	0153:47	Docked
	0249:37	Undocked
	0254:27	Docked
	0351:39	Phasing (docked SPS) 51s 13m/s	89.92 253 x 281 x 28.88
	0822		90.09 244 x 313 x 28.8 (TLE)
	1202:51	Sync for eclipse (docked SPS 18s 5m/s)	90.08 253 x 297 x 28.88
		Solar eclipse photos
	1612:16	Depress
	1615	HO
	1616	SEVA, PLT
	1617	Jettison waste bag
		Attached handrail and UV camera
		S012 retrieved
	1800?	Reentered W of Africa
	1845:03	Hatch closed
	1845:03	Repress (02:32:47)
			258 x 300 x 28.9 (PAO)
	2320		90.02 258 x 291 x 28.9 (TLE)
1966 Nov 13	1532	Begin depress
	1534:04	Depress
	1534:59	Hatch open
	1538	PLT egress
	1550	Attach tether to Agena
		Attach S010 to GATV
	1611	work at AM station
	1728	Back near cabin
	1736	Jettison handrail and 2 waist tethers
	1741	Hatch closed (1:55)
	1742:41	Repress (2:08:37)
	1941	Pitch down to GG attitude
	2009:50	Tethered undocking, radial sep
		30m Gravity gradient test
1966 Nov 14	0037:30	Tether released (docking bar)
	0101:00	Sep burn 2m/s 8s	264 x 300 x 28.8 (PAO)
			90.15 260 x 296 x 28.88 (MR)
	0816		89.95 252 x 291 x 28.8 (TLE)
	1034:20	Phase adj 2m/s 9s	265 x 293 x 28.8 (PAO)
			90.08 261 x 289 x 28.89 (MR)
	1128	S-51 Centaure HMG observed
	1303	S-51 fail to observe HMG launch
	1450	Begin depress
	1451:57	EVA-3 depress
	1453	Hatch open
		PLT SEVA, UV photos
	1455	Jettison ELSS
	1455	Equipment dump
	1500	Begin UV photos
	1540?	S-13 bracket jettison
	1540?	EVA camera cables jett
	1546?	Return to cabin
	1548	Hatch closed
	1549:36	Repress (00:51:39)
1966 Nov 15	1343	Thruster test, 2 failed	90.06 261 x 287 x 28.87
	1845:36	AM sep
	1846:31	Retrofire 91.6m/s aft 34.6m/s down	-40 x 285 x 28.85
			-46 x 293
	1847:23	RM sep
	1921:04	Splashdown
	2027	Recovery by USS Wasp