2009-031B
Lunar Crater Observation and Sensing Satellite, NASA-Ames/NGST. Launch on same LV as LRO. Makes lunar flyby (LSB, Lunar SwingBy) to high inc 37-day orbit and then re-encounters moon 87 days (two orbits) later. Sep 7 hr prior to impact. Impact at 2.5 km/s 65 deg or 80 deg. This is known as a LGALRO orbit - Lunar Gravity Assist, Lunar Return Orbit. Eclipitic incl. 80 deg.
Upper stage will crash into south pole crater; flyby will observe and fly through plume. Finally flyby sc will impact itself 10-15 min later.
Flyby is S-S/C Shepherding Spacecraft. PAFs connect SS to LRO and SS to EDUS.
Stage is EDUS - Earth Departure Upper Stage, i.e. Centaur.
SS is built around ESPA ring 1.5m dia 0.6m high surrounded by offset panels carrying instruments, making it around 2.0m tall 2.6m dia, span 3.3m across antennae. ESPA was developed by CSA Engineering, Mountain View, Calif. The satellite is an NG EagleSat.
Mass 901 kg SS including 590 kg prop, 2000 kg EDUS
Mass is 891 kg launch ( 585 kg dry and 306 kg hydrazine.). Mass at impact ranges from 621 to 866 kg depending on exact trajectory and prop usage.
Centaur is 2249 kg to 2366 kg (nominal 2305 kg).
Impact target is crater Cabeus.
| LCROSS | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2009 Jun 18 | 2132 | Launch by Atlas V 401 AV-020 | CC LC40 |
| T+4:10 Atlas sep | |||
| T+4:20 MES-1 | |||
| T+4:30 Fairing sep | |||
| T+14:30 MECO-1 | 167 x 200 | ||
| T+36:42 MES-2 | |||
| T+41:42 MECO-2 | 165 x ? | ||
| 2218 | T+46:12 EDUS/LCROSS sep from LRO | ||
| 2218 | CCAM | ||
| T+46:16 Begin blowdown | 133 x 348640 x 28.0 | ||
| 2341 | MES3 | ||
| 2345 | MECO-3 | ||
| 2009 Jun 19 | 0131:06 | T+4:00:00 LCROSS takes over Centaur control | |
| 1334 | Pass EL1:4 | ||
| 37-day orbit | |||
| 2009 Jun 20 | 1115 | TCM-1 8.1m/s 9:40 using 22N thrusters | |
| 2315 | TCM-2 | ||
| 2009 Jun 22 | 1030 | TCM-3 | |
| 2009 Jun 22 | 1704 | Enter lunar sphere, 66200 km | |
| 2009 Jun 23 | 1030:33 | R=5008 km h=3270 | 3270 x -18741 x 85.13 |
| T+5d Lunar flyby | |||
| 1220 | Lunar swingby? | ||
| 2009 Jun 24 | 0346 | Leave lunar sphere, R=66200 km | |
| 2009 Jun 26 | 57267.254 347952 x 623592 x 45.50 | ||
| 2009 Jul 10 | Apogee-1 R=582000 | ||
| 2009 Jul 15 | 1700 | Cold side bakeout of ice, 0.03m/s dV | |
| 2009 Jul 21 | 1300 | TCM 5a 21.1m/s, target lunar impact | |
| 2009 Jul 30 | 1600 | CSB-2, 0.01m/s | |
| 2009 Jul 31 | Perigee-1 R=357000 | ||
| 2009 Aug 16 | Apogee-2 R=521000 | ||
| 2009 Aug 21 | 1107 | Anomaly, LCROSS spinning, 150 kg prop used | |
| 2009 Sep 3 | Perigee-2 R=381000 | ||
| 2009 Sep 22 | Apogee-3 R=570000 | ||
| 2009 Sep 25 | 1028 | TCM-7 to target Cabeus A1, 0.32m/s | |
| 2009 Sep 30 | 1500 | TCM-8, switch to Cabeus, 0.35m/s | |
| 2009 Oct 6 | 0000 | TCM-9 7.6s | |
| 2009 Oct 8 | 1748 | Enter lunar sphere of inf.R= 66183 km | |
| 2009 Oct 9 | |||
| 0030 | 44800 km range | ||
| Centaur tail-first | -1707 x -17258 x 87.10 | ||
| 0150 | Centaur sep, I-9h:40, +0.15m/s | ||
| 0201 | Centaur 0.8 km range from SS | ||
| 0230 | SS braking burn I-9h:00 4m5s | ||
| 1036 | Activate instruments at range 300m, I-0:56 | ||
| 1131:19 | Centaur impact, I-0h:00 -84.675 311.275E, Cabeus | ||
| 84.6778S 48.7254W | |||
| 1135:45 | SS impact, I+0:04 -84.729 310.64E | ||
| 84.7193S 49.6203W | |||
Payload:
- VIS Visible Camera (10 cm ap?)
- NIR1 Near IR Camera 1 (4 cm?)
- NIR2 Near IR Camera 1 (4 cm?)
- MIR1 Mid IR Camera 1 (3 cm ap?)
- MIR2 Mid IR Camera 1 (3 cm ap?)
- VSP Visible Spectrometer (3 cm?)
- NSP1 Near IR Spectrometer 1 (10 cm?)
- NSP2 Near IR Spectrometer 2
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