2011-065A
The Fobos-Grunt (Phobos Sample) mission uses a new Lavochkin bus and has a mass of 2000 kg. Launch mass is 8120 kg; includes the MDU stage. Launch mass of PM is 1550 kg. MDU is 6100 kg and is a Flagman stage, Fobos ADU derived with S5.92 engine, similar to Fregat-SB. VA mass is 215 kg and SA for Earth entry is 8 kg. MDU has 4675 kg oxidizer, 2340 kg fuel; SBB has 2004 kg oxidizer, 997 kg fuel.
NIIMASH PM propulsion system: dry mass 56 kg, prop mass 135 kg and 6 kg N2 gas (total 197 kg?) N2O4/UDMH engine 1530N, 2982m/s Isp.) made of 4x 11D458F engine each with 382.4N, 304s Isp, plus small thrusters. Prop mass 343 kg oxidizer 186 kg fuel (max loading) for total prop 529 kg.
Carries out Fobos landing, Fobos launch to Mars orbit, transearth insertion and TCM in transearth cruise.
SA cone, 7 kg VA propulsion system 124N, Isp 3002 m/s, Box
(Based on 11D414NS 13.3N version for elliptical orbit comsat (Meridan?) with Isp 273.3s, 56 kg dry, 42 kg prop, total impulse 79.1 kNs)
Also flyby module, attitude control with 4 x 11D457F thruster with 54N thrust, 1 x 17DF58EF with 12.5N thrust.
Launch vehicle core is the two-stage Zenit-2SB41.1; with the payload this is known as the Zenit-2FG launch vehicle, and had serial number 70181302.
| Guess | NK | |||
| SA | 7 | 7 | 7 | 7 |
| VA dry | 139 | 146 | 148 | 155 |
| VA prop | 135 | 281 | 139 | 294 |
| PM | 550 | 831 | 550 | 844 |
| PM DU | 180 | 1011 | 212 | 1056 |
| PM prop | 1050 | 2061 | 1058 | 2114 |
| Frame | 172 | 2233 | 150 | 2264 |
| YH-1 | 115 | 2348 | 115 | 2379 |
| MDU dry | 735 | 3083 | 735 | 3114 |
| MDU prop | 7015 | 10098 | 7015 | 10129 |
| SBB dry | 335 | 10433 | 375 | 10504 |
| SBB prop | 3001 | 13434 | 3001 | 13505 |
After insertion, no communications until late Nov when ESA/Perth had a few successful contacts, but later contacts yielded only silence.
| FG | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2011 Nov 8 | 2016:03 | Launch by Zenit-2 | KB |
| T+2:22 Stage 1 sep | |||
| T+5:04 GO sep | |||
| Stage 2 MECO | |||
| 2027:28 | Stage 2 sep | 207 x 347 x 51.43 | |
| 2011 Nov 22 | 1844 | St 2 entry over Australia | |
| 2012 Jan 15 | 1746? | Entry 46S 87W | |
| FG prelaunch plan | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2255:48 | T+2h:30 MDU MES-1 8.4min 0.83km/s | ||
| 2305:18 | MDU MECO-1 to ellip orbit | 237 x 4250 x 51.42 | |
| 2307:17 | SBB sep | ||
| 4.2 hour coast | |||
| 2011 Nov 9 | 0102:49 | T+6.8h? MDU MES-2 8.5m 1.105 km/s | |
| 0120:10 | MDU MECO-2 to ellip orbit | 312.0 240? x 17500 | |
| 7 day parking orbit for orbit det | |||
| MDU MES-3 | |||
| MDU MECO-3 to solar orbit Vinf 3.1 km/s | |||
| T+5-10d TCM1 | |||
| T+65d TCM2 | |||
| MOI-21d? TCM3 | |||
| 2012 Aug | Mars arrival with 700-1000 km periapsis height | ||
| 2012 Aug 25 | Mars orbit insertion, MDU burn to 3 day orbit | 900 x 77000 km | |
| MDU sep | |||
| YH-1 sep | |||
| Truss sep | |||
| 2012 Sep | |||
| MOI-2 | 9900 x 77000 | ||
| 2012 Oct | Enter observation orbit | ||
| MOI-3 | 9900 x 9900 | ||
| PM Phobos rendezvous | |||
| 2013 Jan | Quasi-synchronous Phobos orbit, 100 km range | ||
| 2013 Feb | |||
| PM Phobos landing, 8 to 16 hor on surface | |||
| 2013 Mar | VA Phobos launch | ||
| VA in Mars orbit, just lower than Phobos | |||
| 2013 Aug? | |||
| TCM to 9900? x 77000? | |||
| TCM to 900? x 77000? | |||
| 2013 Sep | TEI burn | ||
| 2014 Aug | Earth approach | ||
| SA/VA sep (T - few days) | |||
| SA entry | |||
| 2014 Aug | Landing on Earth | ||
Payload:
- MDU (Marshevaya DU) for EPO and solar orbit insertion
- PM (Pereletniy Modul', cruise module): lander spacecraft.
- Sample arm/drilling rig
- Propulsion system
- Science instruments
- VA (Return spacecraft)
- Ascent propulsion system
- SA (Descent module)
- TDA Thermal Difference Analyzer (IKI/Gerasimov)
- GC Gas Chromatograph (Vernadsky/)
- MAL Mass spectrometer (MPS Lindau/)
- MIMOS Mossbauer spectrometer for mineralogy (IAAC Mainz/IKI/Klingelhofer)
- FOGS Gamma spectrometer for surface composition (Vernadsky/Moskaleva)
- HEND Neutron spectrometer for surface hydrogen (IKI/Mitrofanov, ESTEC/)
- AOST IR Spectrometer (IKI/Korablev)
- LASMA Laser time of flight spectrometer (IKI/Managadze)
- MANAGA Secondary ions mass spectrometer (IKI/Managadze)
- TERMOFOB Thermo Detector (Vernadsky/Marov)
- LWR Long Wave Planetary Radar (KotelnikovInst/Smirnov)
- SEISMO-GRAS Gravimetry (Schmidt Inst, IKI / Manukin)
- METEOR Dust counter (Vernadskiy/)
- FPMS Plasma experiment Ion/electron spectrometers, magnetometer (IKI/Skalsky)
- LIBRATION Star sensor, Phobos libration study (IKI/Lipatov)
- USO Ultrastable oscillator for celest. mech expt (IKI/Gotlib)
- TSNG TV System for landing support, surface mapping (IKI/Avanesov)
- Robotic Arm (IKI/Koslov)
- Panoramic/Stereo TV cameras
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