Sol 273: Facing Cumberland

Sol 272's (12 May) drive has positioned the rover just in front of its new drilling target dubbed Cumberland. The small bump covered 2.05m lasting 14 mins.

Sol 272 view front hazard camera shows the general  view
of the Cumberland workspace. John Klein is in the midground, left side. (NASA/JPL)

Before this drive was accomplished, a flurry of science ops were done including MAHLI views of the John Klein workspace, APXS activity and some laser shots of targets by the ChemCam instrument. All these arm and remote sensing operations had to be squeezed into a work span of just 1 day; from sol 270 to 271. Sol 272 was dedicated to driving and assessment of the drive by engineering cameras. There might be another drive to better position the rover in front of Cumberland. But for the time being, we are here!

Sol 270 MAHLI view of the drill hole at John Klein.
Notice the laser scorch marks made by ChemCam
along the side of the hole facing the camera plus
the white sliver of gypsum veins (NASA/JPL/MSSS)

Sights on Cumberland

As you know, the rover Curiosity has exited the period of solar conjunction which was characterised by low science returns. As of now the rover has finished booting into its new software which includes better auto navigational capabilities which allow the rover to navigate most routes pretty much on its own without intervention from Earth (see the video update at the end of this blog post).

The new target for drilling has been chosen. Dubbed 'Cumberland', the target features numerous features typical of the wet ancient environment that has been the subject of much of the mission's time this past few months. Among the features you may notice is little round concretions that have resisted erosion and stick out of the rock like weird raisins. These are actually concretions; minerals that may have precipitated out of liquid water in the remote Martian past. You can also see thin white cracks. These are gypsum veins which also imply a watery history at least at Curiosity's location.

A white balanced image taken on sol 192 showing
Cumberland. The image was taken with the 100mm
right mastcam eye. Note the 10cm scale at the bottom
of the image. (NASA/JPL/MSSS)

The new target lies west of the rover's current location. A small 'bump' is all it will take to reach as it is fairly close by.

Map showing the location of John Klein and Cumberland. North is up
(NASA/JPL/Univ. of Arizona)

At Cumberland, it'll be all about drilling! But some of you may note; why is the rover targeting a rock that, by all accounts, looks exactly the same as the previous one i.e. John Klein. The recent news report on the mission home site explains:

This second drilling is intended to confirm results from the first drilling, which indicated the chemistry of the first powdered sample from John Klein was much less oxidizing than that of a soil sample the rover scooped up before it began drilling.

The first drill sample may have had some contaminants from all the previous scoopings of Martian soil. Therefore it only seems proper to take yet another sample of the same rocktype from a different locality and compare the findings with the hope that whatever contaminants there are are now likely from a similar rocktype. The results will be more refined and trustworthy.

Sol 262: Conjunction over!

Conjunction is over! Communications have been re-established and after such a long hiatus, I think we're in need of a recap.

The rover Curiosity is currently parked besides an outcrop dubbed John Klein, the site of the mission's first drilling. Plenty of science was accomplished along with some samplings taken for analysis in the SAM and CheMin instruments from the drill hole.

Now what is the rover going to do? The mission team announced during the beginning of conjunction that they will decide on a new drilling target over the period of conjunction. But right now science ops are taking a back sit so that mission engineers can upload new flight software for the rover according to the USGS's mission update. This could take about a week to verify (brain transplants are always a tricky thing to do whether you're dealing with a human or a machine!). Let me leave you with this panorama taken a day after operations resumed on sol 261 (that was May day) by the rover's navigation cameras.

Navigation panorama taken on sol 262 (NASA.JPL/panorama by Abraham Samma)