Saturday, March 17, 2018

Rosetta-Philae

 2004-006A


Rosetta was launched by the first Ariane 5G+ in 2004. Rosetta was built by Astrium (formerly Daimler-Benz Aerospace's Dornier Satellitensysteme) of Freidrichshafen. The spacecraft is box-shaped with 2 solar wings, a propulsion system with 24 10N thrusters and a 2.2m dia HGA. Mass is 809 kg dry with 1720 kg of fuel (1060 kg N2O4 and 660 kg MMH).

2.8 x 2.1 x 2.0m box + 2 panels span 32m. Mass 3065 kg launch with 1670 kg of prop and a 100 kg lander.

Mass at EPC sep is 15708 kg (including full EPS). Mass at EPS burnout is 5892 kg implying a 2827 kg EPS mass at burnout but prior to passivation.

Rosetta will carry the German Surface Science Package (SSP) called Roland.

Rosetta was originally scheduled to carry the Champollion lander, but this was removed from the project in 1996.

Rosetta has Bus Support Module, Payload Support Module.

Control from ESOC.

Rosetta was prepared for launch in 2003 for a rendezvous with 46P/Wirtanen in 2011. After the 2002 Ariane 5 failure, Rosetta was postponed and redirected to 67P/Churyumov-Gerasimenko.

The vehicle was an AR5G+, which is an AR5G with the VEB from the AR5ES (100 kg lighter) and 250 kg extra prop in the EPS stage with an elongated MMH tank. Rosetta used an 123 kg 1194V5 EADS-CASA adapter on the EPS stage and the short A5 payload fairing (12.7m high 5.4m dia). The EPC is the standard AR5G type. The EAP boosters used a P2001 nozzle, 340 kg lighter than standard, pioneered on AR516.

21 Lutetia: 130 x 104 x 74 km, a=2.435 AU assume rho=2.2g/cm3 or 49 x 41 x 34 semiajor axes Albedo 0.1 to 0.2, taxonomy M, M0, W, Xk guesses largest asteroid visited to date. rot 8.17h C-type possible carbonaceous chrondrite type? (or M-type metallic?) But issues with albedo. IR featureless spectra High IR albedo; Lower radar albedo than any M-type asteroid. Hill radius 342Ra = 17111 km, critical distance from 166 to 332 Ra Stability surface (where orbiting objects could be found) in 215 x 361 x 361 Ra Solar radiation pressure perturbs small particles out; mm-size particles cleared, cm-sized particles remain.

Flyby 3055 km nominal

2867 Steins dia 5.5 to 17.5 km p = 6.05hr rot Type E (EII type like 64 Angelina, partial melts derived from enstatite chrondirtes) Iron-poor silicates on surface, like aubrite meteorites. Consistent with high albedo E-type = 0.45 ia 4.6 km.

Steins 1745 km 8.565 km/s

67P/C-G nucleus is 4.1km across, made of two lobes. THe large lobe is 4.1 x 3.2 x 1.3 km, the small lobe is 2.5 x 2.5 x 2.0 km. Rotation period is 12.4043 hours; mass is 1.0E13 kg.

 


Rosetta 
 

DateTimeEventOrbit  

2004 Mar 2  0717:44 Launch by Ariane 5 518G (V158) 
  T+2:19 EAP sep 
  T+3:11 Fairing sep
 0727:34 T+9:50 EPC burnout 
 0727:40 T+9:56 EPC sep  45 x 3849 km x 5.67 deg  
  Long coast for 1h45m 
 0825 T+1:07:00 Apogee 
 0914:29 T+1:56:45 L9.7 stage burn at 652 km  
  T+2:05:06 Perigee at 225 km during burn 
 0924?  Reentry of EPC 
 0931:35 T+2:13:51 EPS MECO at 1097 km 
  Vinf = 3.545 km/s 
 0932:49 T+2:15:05 L9.7 sep  392 x -76662 x 5.70 
 1757  Pass EL1:4 
2004 Mar 3  1030  Pass lunar orbit 
2004 Mar 3   TCM-1 1.0m/s 
2004 Mar 5 0300  Leave Earth sphere 
2004 Mar 6  2211  Leave Earth sphere 1.5Mkm 
2004 Apr 26  0000   359.02d 0.8859AU x 1.0910AU x 0.41 
2004 May 10   TCM-2 152.8m/s 3.5h 
2004 May 14    365.33d 0.8864AU x 1.1137AU x 0.42 
2004 May 16   TCM-3 5.0m/s 
2004 Nov 25   TCM-4 0.17 m/s, anomaly 
2004 Dec 9   TCM-5 0.12m/s 
2005 Feb 8    365.11d 0.886 x 1.114 AU x 1.42 
2005 Feb 17   TCM-6 0.09m/s 
2005 Feb 28  1719  Enter Earth sphere 1.5Mkm 
2005 Mar 2  0900  Enter SOI 
2005 Mar 4  2209:14  Earth flyby 1955 km over Baja Cal.  1954 x -68130 x 144.9  
2005 Mar 7  1115  Leave SOI 
2005 Mar 9  0325  Depart Earth sphere 1.5Mkm 
2005 Mar 28    588.42d 0.990 x 1.758 AU x 1.42 
2006 May 23   Enter hibernation 
2006 Jul   Begin Mars Swingby Phase 
2006 Sep 29 0200 DSM-2 TCM-7 31.8m/s 52min 
2006 Nov 13  2314 TCM-8 0.1m/s 
2007 Feb 9  0200?  TCM-9 Mars-16d 54s 0.04m/s 
2007 Feb 23  1543  Enter Mars sphere 1.08Mkm 
2007 Feb 24  0740  Enter Mars SOI 
2007 Feb 25  0145  Mars flyby 250 km  252 x -8152 x 136.3  
2007 Feb 25  1950  Leave Mars SOI 
2007 Feb 26  1148  Depart Mars sphere 1.08Mkm 
2007 Apr 26   TCM-10 6.5m/s 
2007 May 5    470.88d 0.784 x 1.585 AU x 1.90 
2007   Asteroid belt 
2007 Oct 18  1706  TCM 42s 
2007 Nov 12  0109  Enter Earth sphere 1.5Mkm 
2007 Nov 12  1800  Enter SOI 
2007 Nov 13  2057  Earth flyby 2, 5301 km above 63 46S 74 35W  5299 x -27151 x 115.1  
2007 Nov 15  0000  Leave SOI 
2007 Nov 15  1650 Depart Earth sphere 1.5Mkm 
2007 Dec 31    730.50d 0.911 x 2.264 AU x 7.71 
2008 Sep 4  0856  TCM 0.12m/s 
2008 Sep 5  1837:19  Enter Steins sphere 
 1838:19 Flyby (2867) Steins at 803 km, 8.6 km/s 
 1839:19  Depart Steins sphere 
2009 Mar 18   DSM-4 
2009 Oct 22  1526:10  TCM 1:27 0.09m/s 93 kg 
2009 Nov 11  1155  Earth sphere 1.5Mkm 
2009 Nov 12  0440  Earth sphere 0.9Mkm 
2009 Nov 13 0745:40 Earth flyby 3, 2481 km  
2009 Nov 14  1040  Leave Earth sphere 
2009 Nov 15  0333  Leave Earth sphere 1.5Mkm 
2009 Nov 26    1933.53d 0.980 x 5.094 AU x 4.38 
2010 Jun 18  0624 TCM move aim from 2639 to 3169, 188s 
2010 Jul 10  1512  Enter L sphere 
 1544:55 Flyby (21) Lutetia at 3162 km at 15 km/s 
 1620  Depart L sphere 
2011 Jan 17  1903  OCM part 1 
2011 Jan 17   OCM end. 301 m/s 
2011 Jan 18 1859:13 OCM part 2, 274 m/s  
2011 Jan 19  0113  OCM end 
2011 Jan 21  s  OCM part 3 
2011 Jan 23  s  OCM part 4 
2011 Feb 1   2103.7d 1.136 x 5.290 AU x 6.58 
2011 Jun 8   Hibernation 
2014 Jan 20  Exit hibernation  2103.2d 1.134 x 5.290 AU x 6.58 
2014 May 7  1730 Test burn 20m/s 45min 

2014 May 21 

1523  Orbit Match Mvr day 3140 300m/s 
 2239  Burn complete 
2014 Jun 4  1421:58  Burn 2, 6:39 
 2100  Burn 2 complete, 190 kg prop 
  Arrive at Churyumov-Gerasimenko 
  Far Approach Phase 
  Approach Transition Point 
  Close Approach Phase 
2014 Aug 2  0220  Enter CG Hill sphere 
2014 Aug 6  0900 Close Approach Trajectory Insertion CATI 6:26 1m/s 
  Rendezvous at 100 km, unbound 
2014 Aug 10   100 km, CAT Change 1 TCM 6:25, 0.88 m/s, second 100 km leg 
2014 Aug 11  2100  Closest approach 90 km 
2014 Aug 13   100 km, CAT Change 2, 6:22, 0.87m/s, 3rd 100 km leg 
2014 Aug 17  0900 100 km, CAT Change 3, 6:19, 0.85m/s, Transfer to 80 km 
2014 Aug 19  0700  Closest approach 79 km  
2014 Aug 20  0900 CAT 4, 92 km distance, burn to reduce height 
2014 Aug 21  0230? Within 79 km  
2014 Aug 24  0900 At 72 km, CAT 5 ('little CAT') 
2014 Aug 25   Below 60 km 
2014 Aug 25   Close apporach at 52 km, arc 1 
2014 Aug 27   At 72? km, CAT 6, leg 2 
2014 Aug 29   Close apporach at 52 km, arc 2 
2014 Aug 31   At 72? km, CAT 7,leg 3 
2014 Sep 1   Close approach at 52 km, arc 3 
2014 Sep 3  0900 At 72 km, TGM1 0.6m/s 4:55 Transfer to GMP 
2014 Sep 7   TGM2 0.5m/s 04:18 
2014 Sep 10   GMP1 0.2m/s 02:19 
2014 Sep 10   Global mapping phase 30 km 
2014 Sep 14   GMP slot1 0.03m/s 32s 
2014 Sep 17   GMP-2A 0.09m/s 1:23 
  GMP-2B 0.09m/s 1:25  28 x 29 km  
2014 Sep 21   GMP slot 2 0.02m/s 25s 
2014 Sep 24  s  burn 
2014 Sep 24   Distance r=28.5 km  20 x 30  
  Begin descent to 20 km 
2014 Sep 29  0900  burn  20 x 20  
2014 Oct 8  s  burn  10 x 20  
2014 Oct 15  s  burn  10 x 10  
  Close observation phase 
2014 Oct 27?   8 x 10  
2014 Oct 28  1259  Raise burn 82s, 0.08m/s  10 x 30  
2014 Oct 31   Circ burn 90s  30 x 30  
  SSP delivery phase 
  Relay orbit phase 
  Extended monitoring phase 200d? 
  Perihelion at day 3800 
2014 Nov 12   S-2h Pre-Sep manoeuvre 
  Roland SSP delivery from 22.5 km radius 
2014 Nov 14?   Move to 30 km orbit 
2015 Feb 4   Move to unbound orbits for flybys 
2015 Feb 4   Range 26 km 
2015 Feb 7   Range 142 km apocomet 
2015 Feb 11   Range 101 km 
2015 Feb 14   Range 48 km  
2015 Feb 14  0100  TCM 
2015 Feb 14 1240:50 6 km alt flyby  
2015 Feb 17   253 km 
2015 Feb 20?  Flyby at about 20 km? 
2015 Feb 25   76 km 
2015 Mar 4   88 km 
2014 Mar 7   88 km 
2015 Mar   Philae end of life? 
2015 Mar 28   14 km flyby 
2015 Mar 28   Emergency avoid burn, range to 400 km 
2015 Apr 1  0419  Pass 349 km Hill Sphere outbound 
2015 Apr 1  TCM to brake  
2015 Apr 4  0050  Max range at 385 km 
2015 Apr 4   TCM on course for 140 km approach 
2015 Apr 4  1412  Pass 344 km Hill Sphere inbound 
2015 Apr 8   140 km approach 
2015 Apr 11   100 km, pyramid path 
2015 Apr 25   Range 93 km 
2015 May 23   Range 138 km 
2015 May 26  1256  Pass 276 km Hill Sphere outbound 
2015 May 27  1354  Max range at 325 km 
2015 May 28  1844  Pass 274 km Hill Sphere inbound 
2015 Jun 1   Range 209 km 
2015 Jun 5   Range 208 km 
2015 Jul 1   Range 160 km 
2015 Jul 3   Range 168 km 
2015 Jul 6   Range 160 km 
2015 Jul 7   Range 153 km 
2015 Jul 12   Range 155 km 
2015 Jul   Rosetta plume flythrough 
2015 Jul 25   S hem observations from 180 km 
2015 Jul 27   Range 170 km 
2015 Jul 28   Range 197 km 
2015 Jul 30   Range 179 km 
2015 Aug 3  2130  Pass 221 km Hill Sphere outbound 
2015 Aug 4   Range 222 km 
2015 Aug 7   Range 283 km 
2015 Aug 10   Range 317 km 
2015 Aug 12   Range 334  
2015 Aug 13   R over N hem, 325 km 
2015 Aug 13   67P perihelion 
2015 Aug 17   Range 328  
2015 Aug 20   Range 325 
2015 Aug 24   Range 365 
2015 Aug 25   Range 418  
2015 Aug 30   Range 404  
2015 Sep 3   Range 383 km 
2015 Sep 14   Range 317 km 
2015 Sep 21   Range 329 
2015 Sep 22   Range 340  
2015 Sep 23   Begin far excursion trajectory 
2015 Sep 23   Range 406 
2015 Sep 24   Range 538 
2015 Sep 26   Range 771 
2015 Sep 28   Range 1115 
2015 Sep 29   Range 1394 
 2302  Range 1480 
2015 Sep 30  0145  Range 1501 km, max range 
2015 Sep 30 0602  Range 1490 
 0945  Range 1468 
 1125  Range 1459 km 
 1258  Range 1451 
2015 Oct 1   Range 1354 
2015 Oct 2   Range 1128 
2015 Oct 4   Range 928  
2015 Oct 8   Range 616 
2015 Oct 14   Range 495 
2015 Oct 18   Range 432 
2015 Oct 20   Range 422 
2015 Oct 23   Range 370 
2015 Oct 28   Range 295 
2015 Nov 1  0853  Pass 278 km Hill Sphere inbound 
2015 Nov 3   Range 263 
2015 Nov 12   Range 174 
2015 Nov 17   Range 144 
2015 Nov 29   Range 122 
2015 Dec   End of primary mission 
2015 Dec 3   Range 100 km 
2015 Dec 10   Range 99 km 
2015 Dec 16   Range 112 km 
2015 Dec 25   Range 75 km 
2015 Dec 30   Range 88 km 
2016 Jan   Comet activity declines, reapproach 
2016 Jan 10   Range 79 km 
2016 Jan 27   Range 72 km 
2016 Jan 30   Range 61 km 
2016 Feb 5   Range 53 km 
2016 Feb 10   Range 49 km 
2016 Feb 27   Range 30 km 
2016 Mar 5   Range 20 km 
2016 Mar 12   Range 17 km 
2016 Mar 16   Range 14 km 
2016 Mar 19   Range 12 km 
2016 Mar 23   Range 37 km 
2016 Mar   Anti-sunward excursion 
2016 Mar 27   Range 329 km outbound 
2016 Mar 28  0949  Pass 475 km Hill Sphere outbound 
2016 Mar 29   Range 820 km 
2016 Mar 30  1353 1000 km antisunward, max range 
2016 Apr 2  1853  Pass 482 km Hill Sphere inbound 
2016 Apr 3   Range 442 km 
2016 Apr 9   Range 30 km, zero phase flyby 
2016 Apr 10   Range 30 km 
2016 Apr 13   Range 109 km 
2016 Apr 21   Range 31 km 
2016 Apr 23   Range 30 km 
2016 Apr 29   Range 18 km 
2016 May 3   Range 18 km 
2016 May 11   Range 10 km 
2016 May 25   Range 7 km 
2016 May 28   Range 7 km 
2016 May 29   Range 5 km, safemode 
2016 May 30   Resume contact 
2016 Jun 2   Transition to 30 km orbt 
2016 Jun 4  0140  30 km orbit insertion 
2016 Jun 7   Range 28 km 
2016 Jun   N Hem mapping 
2016 Jun 15   Range 34 km 
2016 Jun 25   Range 18 km 
2016 Jul 2   Range 17 km 
2016 Jul 3   Range 9 km 
2016 Jul 10   Range 10 km 
2016 Jul 24   Range 10 km 
2016 Aug 3   Range 9 km 
2016 Aug 9   Flyover regime 
2016 Aug 10   Range 13 km 
2016 Aug 15   Range 7 km 
2016 Aug 17   Range 14 km 
2016 Aug 22   Range 7 km 
2016 Aug 24   Range 9 km 
2016 Aug 27   Range 5 km 
2016 Aug 30   Range 4 km 
2016 Aug 31   Range 9 km 
2016 Sep 2   Range 2.7 km; Philae found 
2016 Sep 5   Range 3.9 km flyover, 1.9 km height 
2016 Sep 8   Range 4 km 
2016 Sep 11   Range 10 km 
2016 Sep 17  s  Flyover 
2016 Sep 20  s  Flyover 
2016 Sep 24   Post flyover burn 
2016 Sep 26   Transfer burn 16 x 23 km  
2016 Sep 29  2050  Deorbit burn 3 min, alt 19 km 0.34m/s  
2016 Sep 30   Descent to Ma'at/Deir el-Medina 
 0800? Activate passivation commands; 100 kg prop left 
 1039:34  Touchdown at Sais, 0.9m/s 
 1119  LOS at ESOC 

Payload:

  • OSIRIS Multicolor imaging with narrow, wide angle cameras

  • ALICE UV spectroscopy 700-2050 A

  • VIRTIS Vis/IR mapping spectroscopy 0.25-5 mu

  • MIRO Microwave spectroscopy 1.3, 0.5mm

  • ROSINA Neutral gas, ion mass spectroscopy

  • MODULUS Gas chromatograph for light elements

  • COSIMA Dust mass spectrometer

  • MIDAS Atomic force microscope for grain morphology

  • CONSERT Radio sounding comet nucleus tomography

  • GIADA Dust flux,velocity/momentum, contamination monitor

  • RPC Comet plasma:

    • Langmuir probe

    • Ion/electron sensor

    • Flux gate magnetometer

    • Ion composition analyser

    • Mutual impedance probe

  • RSI Radio science experiment


2004-006

The Rosetta Lander (RoLand) will be deployed onto the comet's surface. The lander was named Philae after the location of an obelisk which helped Champollion decipher the Rosetta stone. Some of the experiments are also carried on the orbiter. Lander is 85 kg, of which 21 kg are experiments.

Size is box + half octagon, 0.9 x 0.9m, with 2.0m span across legs. OWLT is 00:28:20 at 511 million km.

The selected landing site was Site J, subsequently named Agilkia, after the Nile island which now houses the relocated Philae temple complex. After bouncing twice, Philae landed at another site later named Abydos.


Philae 
 

DateTimeEventOrbit  

2014 Nov 11  1805  Switchon 
 2024  Lander flywheel on 
2014 Nov 12  0335  Sep Descent and Landing (SDL) sequence on 
 0735  Rosetta pre-sep mvr to comet-hyperbolic orbit 
 0835  Philae sep from Rosetta at 0.18m/s, range 22.5 km 
 0844  100m range, deploy landing gear 
 0856:20 Deploy ROMAP boom 
 0857  Rotation to stable landing orientation 
 0915  Post delivery mvr 
 1025  AOS Philae-Rosetta signal sent 
 1053  AOS detected on Earth 
 1534  Landing at 1m/s 

 

 Fire harpoons, failed 
  Flywheel off 
 1534  Bounce to 70 m? 
 1620  Hit surface, tumbled 
  Reached 170m height 
 1726  Second touchdown, bounce 
 1732  Third touchdown, Abydos 
2014 Nov 14  0930  LOS 
2014 Nov 14  2251  AOS 
2014 Nov 15  0008  Philae in hibernation, LOS 
2015 Jun 14   Signal from Philae received 
2015 Jul 9   Last pre-perihelion signal from Philae 

Payload:

  • ROLIS Roland Imaging System

  • CONSERT Comet nucleus sounding experiment by Radiowave Transmission

  • SESAME Surface electrical sounding and acoustic monitoring experiment, dust impact monitor; mechanical and electrical parameters

  • APXS Alpha p/X-ray spectrometer

  • MUPUS Multi-purpose sensor for surface and sub-surface science

  • ROMAP Roland magnetometer and plasma monitor

  • CIVA Comet nucleus infrared and visible analyser (cameras,s spectrometer for surface samples)

  • SD2 Sampling, Drilling and Distribution instrument (drill, depth 23 cm)

  • COSAC Cometary Sampling and Composition Experiment, looking for organic molecules

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