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Time since launch Planned time Time Event Altitude L+(dd:hh:mm[:ss]) UTC (km) Actual[Prelaunch] Actual -0:00:00:072021 Dec 25 1220:00 Vulcain 2 engine ignition 0 +0:00:00:002021 Dec 25 1220:07 Launch 0 0:00:02:21 2021 Dec 25 1222:28 EAP solid boosters shutdown and separation 72 0:00:03:26 2021 Dec 25 1223:33 Ariane fairing halves separation 126 0:00:08:41? 2021 Dec 25 1228:48 Ariane EPC core stage shutdown 0:00:08:47 2021 Dec 25 1228:54 Ariane EPC core stage separation 229 0:00:08:51 2021 Dec 25 1228:58 Ariane ESC-D engine start 229 0:00:24:51 2021 Dec 25 1244:58 Ariane ESC-D engine cutoff 928 0:00:27:07 2021 Dec 25 1247:14 Ariane ESC-D stage separates from JWST 1391 0:00:28:16? [L+ 33 min] 2021 Dec 25 1248:23? JWST deploy solar array 2600 0:00:29? 2021 Dec 25 1249? Ariane ESC-D stage performs EOLM (End of Life Manuever) 0:12:30:00 [L+12.5h] 2021 Dec 26 0050 JWST MCC-1a burn, SCAT-1/2, 16 to 17 m/s? 133700 0:13:35:00 2021 Dec 26 0155 JWST MCC-1a burn complete. Actual dV UNKNOWN 1:02:40 [L+ 1d] 2021 Dec 26 1500? JWST deploy GAA (Gimballed Antenna Assy) high gain comms antenna (and MGA?)228000 2:07:38 2021 Dec 27 1958 JWST pass lunar orbit 377000 2:12:00 [L+ 2d] 2021 Dec 28 0020 JWST MCC-1b burn, SCAT-1/2, 9m27s, 2 m/s? Actual dV UNKNOWN 388500 3:02: L+ 3.0 days 2021 Dec 28 1430? Begin Forward UPS (unitized pallet structures)444000 3:06:01L+ 3.0 days 2021 Dec 28 1821 Complete Deploy Forward UPS (unitized pallet structures)458000 3:12:07L+ 3.16 days 2021 Dec 29 0027 Complete Deploy Aft UPS (unitized pallet structures) 480000 L+4.07d 2021 Dec 29Spacecraft-to-Optical Telescope Element launch release mechanism L+4.1d 2021 Dec 29 Spacecraft-to-ISIM Electronics Compartment launch release mechanism 4:02:25L+ 4.2 days 2021 Dec 29 1445 Begin to raise DTA (deployable telescope tower assembly)528000 4:09:04L+ 4.2 days 2021 Dec 29 2124 Complete raising DTA (deployable telescope tower assembly)549000 L+ 4.48 days Release CJAA (Cryocooler Jitter Attenuation Assy) L+ 5.0 days Release CCA (Cooler Compressor Assy) 5:02? L+ 5.05 days 2021 Dec 30 1400? Deploy solar trim tab (Aft Momentum Flap) on right(?) panel 600000 L+ 5.1 days Release sunshade restraints 600000 5:05:07L+5.17 days 2021 Dec 30 1727 Sunshade central covers retracted600000 6:06:10L+6.02 days 2021 Dec 31 1830Start Deploy +J2 mid-boom (port sunshade boom) and DRSA-H Deployable Radiator Shade Assy/Horiz676000 6:09:29L+6.02 days 2021 Dec 31 2149 Complete Deploy +J2 mid-boom (port sunshade boom) and DRSA-H Deployable Radiator Shade Assy/Horiz684000 6:11:11L+6.25 days 2021 Dec 31 2331 Begin deploy -J2 mid-boom (stbd sunshade boom) and DRSA-H Deployable Radiator Shade Assy/Horiz688000 6:14:53L+6.25 days 2022 Jan 1 0313 Complete deploy -J2 mid-boom (stbd sunshade boom) and DRSA-H Deployable Radiator Shade Assy/Horiz698000 9:02:40L+7.0 days 2022 Jan 3 1500Start of Sunshade tensioning and layer separation831000 9:08:28 2022 Jan 3 2048 Layer 1 tensioned843000 9:08:49 2022 Jan 3 2109 Layer 2 tensioning begins843500 9:10:03 2022 Jan 3 2223 Layer 2 tensioned846000 9:10:28 2022 Jan 3 2248 Layer 3 tensioning begins847000 9:11:39 2022 Jan 3 2359 Layer 3 tensioned849000 2022 Jan 4 Layer 4 aft tensioning begins 10:03:03 2022 Jan 4 1523 Layer 4 tensioned879000 10:03:50 2022 Jan 4 1610 Layer 5 tensioning begins 10:04:39 2022 Jan 4 1659 Layer 5 tensioned882000 L+8.0 days 2022 Jan 4 1700 Complete Sunshade tensioning and layer separation882000 L+9.0 days Deploy DRSA-V Deployable Radiator Shade Assy/Vert. L+9.06 days Deploy Star Tracker Support Assy 11:03:56L + 9.9 days 2022 Jan 5 1616Begin deploy SMSS (Secondary Mirror Support Structure) 924000 11:04:32L + 9.9 days 2022 Jan 5 1652 Deploy SMSS (Secondary Mirror Support Structure) complete 925000 12:01:28L+11.0 days 2022 Jan 6 1348 Raise ADIR (Aft Deployed Instrument Radiator) on back of ISIM960000 13:01:26L + 12.0 days 2022 Jan 7 1336 Begin unfold lateral PMBA (Primary Mirror Backplane Assembly) Wing 1 (port, +V2)998500 13:06:51L + 12.0 days 2022 Jan 7 1911 Complete unfold lateral PMBA (Primary Mirror Backplane Assembly) Wing 1 (port, +V2)1007100 14:03:00L+13.0d 2022 Jan 8 1520? Begin unfold lateral PMBA (Primary Mirror Backplane Assembly) Wing 2 (stbd, -V2) 14:05:57L + 13.0 days 2022 Jan 8 1817 Complete unfold lateral PMBA (Primary Mirror Backplane Assembly) Wing 2 (stbd, -V2)1041300 14:05:57L + 13 days 2022 Jan 8 1817 PMSA (Primary Mirror Segment Assembly) deployment complete1041300 L + 13.8 days Begin ACS activation 18:L+15.5 days 2022 Jan 12 Begin PMSA (Primary Mirror Segment Assy) and SMA actuation/deployment 18:03 2022 Jan 12 1500? Ariane 5 upper stage leaves Earth Hill Sphere 25:L+25.3 days 2022 Jan 19 Complete mirror segment actuation/deployment 25:L+25.3 days 2022 Jan 19 Activate K-band comms 30:06:40L + 29 days 2022 Jan 24 1900 MCC-2 with SCAT-3/4 thrusters, 1.5 m/s, 298 s burn - Arrive Sun Earth L2 halo orbit1379000 30:06:45L + 29 days 2022 Jan 24 1905 MCC-2 complete 1379000 L + 29 days Begin cooldown 34: 2022 Jan 28 FGS powered on 36:L+36 days Begin telescope commissioning 37:L+36 days 2022 Jan 31 Begin mirror alignment 39: 2022 Feb 2 NIRCam first photons 45:? L+77d 2022 Feb 8? MIRI cooler activated 50:L+O(1 mo) 2022 Feb 13 FGS guiding L+O(50d) SKM-1 stationkeeping burn with SCAT-3/4 55:L+45d 2022 Feb 18 Segment Image Identification, OTE segments in formation L+60d? Phasing of OTE 76: 2022 Mar 11 Fine phasing completed, NIRCAM 82: 2022 Mar 17 Begin MIMF (Multi Instrument Multi Field) alignment L + 120d Instruments complete cooling to 50K 117:L + 120d 2022 Apr 21 MIRI cooled to 7K 124:L+124 days 2022 Apr 28 Complete mirror alignment, PSF checks 124:L+124 days 2022 Apr 28 Complete telescope commissioning 124:L+124 days 2022 Apr 28 Begin science instrument commissioning L + 120d Instrument calibration 197:L + 180d 2022 Jul 10 Science instrument commissioning complete 197:L + 180d 2022 Jul 10 Begin Cycle 1 GO observations 199:L + 180-200d 2022 Jul 12 1430 RELEASE FIRST IMAGES (ERO, Early Release Observations)