1985-056A
Giotto was based on the Geos bus and built by the same BAe/STAR consortium. The probe was built from the Geos engineering model. ESA controlled Giotto from ESOC. Flyby velocity was 68.4 km/s with 596 km closest approach.
| Giotto | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1985 Jul 2 | 1123:13 | Launch by Ariane I | CSG |
| T+2:25 St 1 MECO | |||
| T+2:30 Stage 2 burn | |||
| T+4:14 Fairing | |||
| T+4:51? St 2 sep | |||
| T+4:55? Stage 3 burn 9:21? | |||
| 1137 | T+14:16? Stage 3 MECO | ||
| 1138? | Stage 3 sep | 203 x 35421 x 7.0 | |
| 1139 | Perigee | ||
| 1145 | AOS by Malindi | ||
| 1650 | Spin axis slew | ||
| 1985 Jul 2 | 1700? | Apogee 1 | |
| 1985 Jul 2 | 2110 | Perigee 1, 202 km | |
| 2210 | Perigee 1 from TLE | ||
| 1985 Jul 3 | 0230? | Apogee 2 | |
| 0844 | Perigee 2 from TLE | ||
| 1400? | Apogee 2 | ||
| Spinup | |||
| 1914 | Perigee 3 from TLE 2 | ||
| 1918 | Perigee 3 from TLE 1 | ||
| 1923:47 | Mage 1S perigee burn 1.40km/s | Solar orbit | |
| 1924:42 | Burnout (55s) | |
| 1985 Jul 4 | 0333? | Pass EL1:4 | |
| 1985 Jul 4 | 0730 | Nozzle cover closed | |
| 1985 Jul 6 | 0947 | HGA release | |
| Begin cruise, mass 578.5 kg | |||
| 1985 Jul 8 | 0230? | Pass L1 | |
| 1985 Jul 15 | 3.43Mkm range | ||
| 1985 Aug 26 | TCM-1, 7.27m/s, 92 min | ||
| 1985 Oct 2 | Range 20.235Mkm to Earth | ||
| 1986 Jan 24 | Antenna lock loss, recovered by DSN | ||
| 1986 Mar 12 | 0053 | TCM 2.5m/s | |
| 0125 | TCM complete | ||
| 1986 Mar 13 | 1816 | (ERT) PKS gets signal | |
| 1986 Mar 13 | Encounter P/Halley at 0.90AU, vrel 68.4 km/s | ||
| Mass 573.9 kg | |||
| 2356:58 | First bumper shield penetration | ||
| 1986 Mar 14 | 0002:52 | Last image | |
| 0002:52 | Hit by 1g of particles | ||
| 0002:55 | Loss of signal | ||
| 1986 Mar 14 | 0003:02 | Passed 596 km from nucleus | |
| 0003:19 | Signal recovered | ||
| 0004:34 | Spacecraft nutating | ||
| 0034:58 | Spacecraft recovered | ||
| 1986 Mar 19 | TCM 4h30m, 63 m/s, 19 kg | ||
| 1986 Mar 20 | TCM 4:10min, 46m/s, 14 kg | ||
| 1986 Mar 21 | TCM 16min, 2.6m/s, 1 kg | 0.833 yr 0.733 x 1.04 AU | |
| 1986 Apr 1 | TCM 1.5m/s | ||
| 1986 Apr 2 | TCM 1.3m/s? | ||
| 1986 Apr 2 | 0225 | Deactivated | |
| 1990 Feb 20 | Reactivated by DSN/Madrid, R=102.9 Mkm Rdot=14.54km/s Vsun=37.36km/s | ||
| 1990 Feb 21 | HGA despin attempts | ||
| 1990 Feb 25 | 1745 | ESOC resumes control | |
| HMC and NMS deactivates | |||
| 1990 Mar 3 | Perihelion | ||
| 1990 Mar 13 | TCM to retarget for Grigg-Skjellerup | ||
| 1990 Jul 2 | 1001:18 | Flyby Earth, 22730 km over Australia | 390d? |
| Inc = 45 deg | |||
| 1990 Jul 16 | TCM 0.5m/s | ||
| 1990 Jul 22 | Hibernation mode | ||
| 1992 Apr | Reactivated | ||
| 1992 May 22 | TCM, 3.5m/s targeting to 800 km | ||
| 1992 Jul 1 | Science instruments on | ||
| 1992 Jul 8 | TCM, 2m/s targeting to 200 km | ||
| 1992 Jul 10 | 1519 | Encounter P/Grigg-Skjellerup 200 km, at 1.01 AU from Sun LT=24min | |
| Rel 13.99 km/s | |||
| 1992 Jul 11 | Experiments off | ||
| 1992 Jul 21 | TCM, target to Earth swingby, 4h burn 33m/s | ||
| 1992 Jul 23 | TCM correction 3m/s | ||
| 1992 Jul 23 | In hibernation mode | ||
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