rosetta media briefing 16 october 2014 - dr. gerhard schwehm, former rosetta mission manager &...
DESCRIPTION
The cometary science challengeTRANSCRIPT
![Page 1: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/1.jpg)
Gerhard Schwehm & Matt Taylor
and the Rosetta SWT
Rosetta: Science at Comet 67P/Churyumov-Gerasimenko
![Page 2: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/2.jpg)
Lowry et al., 2012
Lamy et al., 2007
Vincent et al 2013
C67P/Churyumov-Gerasimenko
How we imagined the comet before the arrival
![Page 3: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/3.jpg)
Lowry et al., 2012
Lamy et al., 2007
Vincent et al 2013
C67P/Churyumov-Gerasimenko – the Fiction
![Page 4: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/4.jpg)
C67P/Churyumov-Gerasimenko – the Reality
Mass ~ 1013 kg
Volume ~ 25 km3
Density ~ 0.4g/cm3
Rotation ~ 12.4 hour
![Page 5: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/5.jpg)
Mass ~ 1013 kg
Volume ~ 25 km3
Density ~ 0.4g/cm3
Rotation ~ 12.4 hour
Comet nucleus
![Page 6: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/6.jpg)
Mass ~ 1013 kg
Volume ~ 25 km3
Density ~ 0.4g/cm3
Rotation ~ 12.4 hour
Comet nucleus
More recently - Temperature variations across regions and with local time. average ~ -70o C , peaking -40o C
![Page 7: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/7.jpg)
ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
ESA/Rosetta/Navcam
Comet nucleus
‘Cheops’
![Page 8: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/8.jpg)
ESA/Rosetta/Navcam
ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Comet nucleus
![Page 9: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/9.jpg)
ESO/ESA Snodgrass et al., 2014
19,000 km
Comet activity and coma
![Page 10: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/10.jpg)
19,000 km
ESO/ESA Snodgrass et al., 2014
Comet activity and coma
![Page 11: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/11.jpg)
Comet activity and coma - gas
ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
![Page 12: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/12.jpg)
“selfie” taken Sept. 8th from Philae,
still attached to the Orbiter, with
our target comet at 50 km
ESA/ROSETTA/PHILAE/CIVA
![Page 13: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/13.jpg)
Sss
Selfie from 16 km Composite Image
ESA/ROSETTA/PHILAE/CIVA
![Page 14: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/14.jpg)
COSIMA GIADA
Comet activity and coma - dust
1 cm
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Total number densities measured by
ROSINA-COPS
The density varies with the rotation period
and the latitude (summer/winter) of the
comet due to illumination from the Sun
![Page 16: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/16.jpg)
15 20 25 30 35 40 45 50
0
20000
40000
60000
80000
100000
120000
CO2
CO
row A_22-08-2014
row A_01-08-2014
ion
num
be
r
m/z
H2O
Distance of Rosetta from
67P/CG
01-08-2014 10:15 =>
885km
22-08-2014 13:50 => 61
km
Distance from Rosetta to
the Sun
01-08-2014 => 3.6 A.U.
22-08-2014 => 3.5 A.U.
DFMS – first results on chemical composition
Nu
mb
er
of
ion
s i
n 2
0s
Major species
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High resolution neutral mass spectrum
of mass 28 Da
![Page 18: Rosetta Media Briefing 16 October 2014 - Dr. Gerhard Schwehm, former Rosetta Mission Manager & ESA Comet Expert](https://reader034.vdocuments.us/reader034/viewer/2022052523/555ccc16d8b42a5f718b59b1/html5/thumbnails/18.jpg)
Conclusions: the
perfume of C-G
There are a lot of sulfur species in the coma
The comet smells of rotten eggs
There is ammonia in the coma
The comet smells like horse droppings
There are a lot of acids, alcohols, hydrocarbons
The perfume of C-G is very special, but
interesting
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Comet activity and coma - plasma