1989-062B
The HIPPARCOS (High Precision Parallax Collecting Satellite) mission was a landmark project to obtain accurate positional data on the stars. It carried a special dual Baker-Schmidt astrometric telescope. The satellite was named after Hipparcos of Rhodes ( about 180 to 120 BC?), who made the first known accurate star catalog.
The MAGE 2 apogee motor was intended to place the spacecraft in geostationary orbit; it was to have been stationed at 12 deg W. The satellite consisted of the ABM, the bus module with solar arrays, the PLMA telescope system, and a sunshade structure.
After failure of the apogee motor to fire, the hydrazine propulsion system was used to adjust the orbital period and the mission was redesigned to use the elliptical orbit, using an adjusted orbital period that was a multiple of the 128min scanning period.
The telescope was a 0.29m-primary with a 0.9 deg field of view; the primary detection system had a 38 arcsec diameter field of view. It operated in the 3750-7500A band. The Tycho star mapper had B and V filters.
| Hipparcos | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1989 Aug 8 | 2325:53 | Launch by Ariane (V33) | CSG |
| T+0:03 PAP on | |||
| T+1:06 PAP sep | |||
| T+2:29 PAL sep | |||
| T+3:45 St 1 sep | |||
| T+3:37 St 2 MES | |||
| 2330:39 | T+4:46 Fairing | ||
| T+5:54 St 2 sep | |||
| 2331:43 | T+5:50 St 3 MES | ||
| 2343:44 | T+17:51 Stage 3 MECO | ||
| 2346:25 | T+20:32 TVsat sep | ||
| 2349: | T+23:02 Spelda sep | ||
| 2349:36 | T+23:07 Hipparcos sep | ||
| 1989 Aug 9 | 0530? | Apo 1 | |
| 1000? | Peri 1 | ||
| 1600? | Apo 2 | ||
| 2030? | Peri 2 | ||
| 1989 Aug 10 | 0200? | Apo 3 | |
| 0700? | Peri 3 | ||
| 1200? | Apo 4 over 20W | ||
| 1989 Aug 10 | 1214:00 | MAGE ABM failed to fire, Apo 4 | |
| 1730? | Peri 4 | ||
| 2145 | Slew to attitude for Apo 6 attempt | ||
| 2300? | Apo 5 | ||
| 1989 Aug 11 | 0400? | Peri 5 | |
| 0900? | Apo 6 | ||
| 1989 Aug 11 | 0910 | ABM failed on 2nd attempt, Apo 6 | |
| 0915? | Failed attempt | ||
| 0925 | Failed attempt | ||
| 101 | Attitude for Apo 8 | ||
| 1430? | Peri 6 | ||
| 2000? | Apo 7 | ||
| 1989 Aug 12 | 0100? | Peri 7 | |
| 0600? | Apo 8 | ||
| 1130? | Peri 8 | ||
| 1700? | Apo 9 | ||
| 2200? | Peri 9 | ||
| 1989 Aug 13 | 0300? | Apo 10 over 119E | |
| 0830? | Peri 10 | ||
| 1351:00 | Apo 11 over 39W; Attempt 3 fails | ||
| 1900? | Peri 11 | ||
| 1989 Aug 13 | 628.32 221 x 35622 x 7.0 | ||
| 1989 Aug 14 | |||
| 0000? | Apo 12 | ||
| 0530? | Peri 12 | ||
| 1000? | Apo 13 over 6E | ||
| 1600? | Peri 13 | ||
| 2030 | Apo 14 | ||
| 1989 Aug 15 | 0230? | Peri 14 | |
| 0700? | Apo 15 over 51E | ||
| 1300? | Peri 15 | ||
| 1700? | Apo 16 over 103W | ||
| 2300? | Peri 16 | ||
| 1989 Aug 16 | 0400? | Apo 17 over 96E | |
| 0930 | Peri 17 | ||
| 1400 | Apo 18 over 58W | ||
| 2000? | Peri 18 | ||
| 1989 Aug 17 | 0100? | Apo 19 over 141E | |
| 0630? | Peri 19 | ||
| 1100? | Apo 20 over 13W | ||
| 1989 Aug 17 | 1200 | Attempt 4 fails over 20W | |
| 1700? | Peri 20 | ||
| 2200? | Apo 21 over 174W | ||
| 1989 Aug 21 | 1010s | Attempt 5 due | |
| 1989 Aug 22 | Attempt 6 due | ||
| 1989 Aug 28 | 627.90 245 x 35577 x 7.0 | ||
| 1989 Sep 5 | 627.80 241 x 35576 x 7.0 | ||
| 1989 Sep 6 | 1200 | Despin from 37 to 30 rpm | |
| 1989 Sep 7 | 1030:00 | Burn 1, raise perigee 98 km | 339? x 35580? x 7.0 |
| 1989 Sep 8 | 0725 | Burn 2, raise perigee 102 km | 448 x 35580? x 7.0 |
| 1989 Sep 11 | 0914 | Burn 3, working orbit | 532 x 35800? x 7.0 |
| Despin to 10 rpm | |||
| 1989 Sep 12 | 0502 | Solar panels deployed | |
| 1989 Sep 12 | Fill-in antenna deployed | ||
| 1989 Sep 14 | 1422:30 | Burn 4, orbit adjust | |
| 1989 Sep 18 | 1352 | Final burn | |
| 1989 Sep 19 | Hydrazine venting initiated | ||
| 1989 Sep 29 | Hydrazine venting completed | ||
| 1989 Sep 23 | 3-axis stabilized | ||
| 1989 Sep 26 | Telescope baffles opened | ||
| 1989 Nov 1 | Scanning acquisition complete | ||
| 1989 Nov | Calibrations | ||
| 1989 Nov 26 | Nominal revised mission begins | ||
| 1990 Aug 7 | 639.23 514 x 35890 x 7.3 | ||
| 1992 Aug 4 | 1055 | AOCS failed | |
| 1830 | Backup AOCS working | ||
| 1993 Jun 24 | OBC failure | ||
| 1993 Jul 8 | OBC restart attempts | ||
| 1993 Aug | Engineering tests | ||
| 1993 Aug 13 | Spin up to 10rpm | ||
| 1993 Aug 15 | 1600 | end of ops | |
| 1996 May 4 | 637.43 530 x 35782 x 7.1 | ||
Payload:
- Hipparcos dual astrometric telescope
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