CometWatch 20 November

This four-image montage comprises images taken of Comet 67P/Churyumov-Gerasimenko on 20 November, from a distance of 30.5 km from the centre of the comet. The image resolution is 2.59 m/pixel, so each 1024 x 1024 frame measures...


Approaching a comet in 3D

As Philae approached Comet 67P/Churyumov-Gerasimenko on 12 November 2014, the lander's downward-looking camera ROLIS took images of the descent. Now the ROLIS team from DLR has used two of them to produce a stereographic image. To appreciate...

Philae's final landing site, estimated by CONSERT. Graphics courtesy W. Kofman/CONSERT team

Homing in on Philae’s final landing site

Based on inputs provided by the CONSERT principal investigator Wlodek Kofman, CNRS researcher at the Institut de Planétologie et d'Astrophysique de Grenoble, Grenoble, France. In addition to the on-going visual searches using OSIRIS and NAVCAM images, the...


Cometwatch - 17 November

After last week's intense activities centred on Rosetta's lander Philae and its descent to the surface of Comet 67P/Churyumov-Gerasimenko, it's time to take another look at this beautiful comet through Rosetta's navigation camera. This NAVCAM mosaic comprises...

Focus on SD2, COSAC and Ptolemy. Credits: ESA/ATG medialab

Did Philae drill the comet?

Philae’s Sampling, Drilling and Distribution (SD2) subsystem was activated towards the end of the surface operations that Philae performed on Comet 67P/Churyumov-Gerasimenko last week, despite fears that it might alter the lander’s precarious position following its third...


Reddit AMA 20 Nov 19:00CET start

Engineers from Rosetta mission control at ESOC, Germany, the Rosetta Science Operations Centre at ESAC, Spain, and the Lander Control Centre, Cologne, will take part in a reddit AMA (Ask me Anything!) on Thursday, 20 November 19:00CET...

Focus on MUPUS. Credits: ESA/ATG medialab

Philae settles in dust-covered ice

Before going into hibernation in the early hours of 15 November 2014, the Philae lander was able to conduct experiments and return its data to Earth. In this blog post we look at the preliminary analysis conducted...


Philae spotted after first landing on 67P

Some careful work by a number of people in ESA's Flight Dynamics team and by readers of our Rosetta blog has shown that these NAVCAM images show more, namely Philae itself, just after the bounce!


Our lander's asleep

With its batteries depleted and not enough sunlight available to recharge, Philae has fallen into 'idle mode' for a potentially long silence. In this mode, all instruments and most systems on board are shut down. "Prior to...

Lander battery voltage falling fast

On board Philae, system voltage has fallen very close to 21.5V; below that, the battery won't last much longer. At this time, there is insufficient sunlight to provide power.


First hour of lander communication

Update from Stephan Ulamec, Lander manager at DLR: “We’ve got data – all the house-keeping data and data from COSAC – although we’ve no idea what’s in there yet. The drill (SD2) moved up and down, but...

Deputy flight director Elsa Montagnon watching data flow from Philae on the surface of comet 67P/C-G Credit: ESA

Philae still talking!

Rosetta has regained contact with Philae sitting on the surface of a comet (511 million km away!) during tonight’s communication pass, confirming that the lander still has power on the surface of Comet 67P/Churyumov-Gerasimenko. The pass began...