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Sols 4479-4480: What IS That Lumpy, Bumpy Rock?
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Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 2 min read
Sols 4491-4492: Classic Field Geology Pose
NASA’s Mars rover Curiosity acquired this image using its Front Hazard Avoidance Camera (Front Hazcam), showing the rover’s right-front wheel perched on a small, angular block, where it ended its weekend drive of about 75 feet (23 meters). In the interest of stability, the Curiosity team prefers to have all six rover wheels on the ground before deploying its 7-foot-long robotic arm (2.1 meters), so they opted for remote sensing observations instead, then another drive higher in the canyon. Curiosity captured this image on March 23, 2025 — sol 4489, or Martian day 4,489 of the Mars Science Laboratory mission — at 15:24:49 UTC. NASA/JPL-Caltech Written by Lauren Edgar, Planetary Geologist at USGS Astrogeology Science Center
Earth planning date: Monday, March 24, 2025
If you’ve ever seen a geologist in the field, you may have seen a classic stance: one leg propped up on a rock, knee bent, head down looking at the rocks at their feet, and arm pointing to the distant stratigraphy. Today Curiosity decided to give us her best field geologist impression. The weekend drive went well and the rover traversed about 23 meters (about 75 feet), but ended with the right front wheel perched on an angular block. In the Front Hazcam image above, you can see the right front wheel on a small block, and the rover’s shadow with the mast staring out at all the exciting rocks to explore. Great pose, but not what we want for planning contact science! We like to have all six wheels on the ground for stability before deploying the robotic arm. So instead of planning contact science today, the team pivoted to a lot of remote sensing observations and another drive to climb higher in this canyon.
I was on shift as Long Term Planner today, and it was fun to see the team quickly adapt to the change in plans. Today’s two-sol plan includes targeted remote sensing and a drive on the first sol, followed by an untargeted science block on the second sol.
On Sol 4491, ChemCam will acquire a LIBS observation of a well-laminated block in our workspace named “Big Narrows,” followed by long-distance RMI observations coordinated with Mastcam to assess an interesting debris field at “Torote Bowl.” The team planned a large Mastcam mosaic to characterize the stratigraphy at Texoli butte from a different viewing geometry than we have previously captured. Mastcam will also be used to investigate active surface processes in the sandy troughs nearby, and an interesting fracture pattern at “Bronson Cave.” Then Curiosity will drive further to the south and take post-drive imaging to prepare for the next plan. On the second sol the team added an autonomously selected ChemCam AEGIS target, along with Navcam movies to monitor clouds, wind direction, and dust.
Keep on roving Curiosity, and please watch your step!
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Last Updated Mar 26, 2025 Related Terms
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Sols 4486-4487: Ankle-Breaking Kind of Terrain!
NASA’s Mars rover Curiosity acquired this image using its Front Hazard Avoidance Camera (Front Hazcam) on March 18, 2025 — sol 4484, or Martian day 4,484 of the Mars Science Laboratory mission — at 11:54:13 UTC. NASA/JPL-Caltech Written by Catherine O’Connell-Cooper, Planetary Geologist at University of New Brunswick
Earth planning date: Wednesday, March 19, 2025
This terrain is a tricky drive, with rocks angled chaotically all around. One of our geologists remarked that they wouldn’t like to even walk over this without solid boots coming way up over the ankles — this is definitely the kind of terrain to result in twisted and broken ankles! So it wasn’t too unexpected that the drive we had planned on Monday cut short after 18 meters (about 59 feet). Fortunately, we ended up both at a workspace with abundant bedrock and in an orientation that allowed us to pass SRAP (our “Slip Risk Assessment Process”).
The rover planners were quickly able to find a spot to brush, so we have a coordinated target on “Palm Grove,” one of the laminated rocks in the lower half of the accompanying image. APXS and MAHLI will look at this target on the first sol of the plan, and then ChemCam LIBS and Mastcam will look at it on the second sol. Although the bulk of the bedrock is relatively nodule free, ChemCam will look at the nodular target “Refugio” to compare to the more dominant, nodule-poor bedrock.
On Monday, our workspace included some very interesting layers in the bedrock that might represent preserved sand ripples, but sadly, as Conor reported on Monday, we didn’t pass SRAP, which precluded any contact science. However, today we ended up near rocks that had similar layer geometry, and will acquire a MAHLI “Dog’s Eye” or mosaic image of these rocks at “Duna Vista” and two Mastcam 5×3 mosaics (“Bayside Trail” and “Oso Flaco”) on other examples.
Mastcam is taking several other images here. A 14×3 mosaic will capture the “nearfield” or area close to the rover, and a set of four further images focus on four distinct trough features, to help us better understand ongoing modification of the surface. Further afield, the “Quartz Hill” and “Pino Alto” mosaics look at areas of fragmented bedrock which may be similar to the “Humber Park” outcrop we analyzed this past weekend. Even further from the rover, ChemCam will acquire RMI (Remote Micro Imager) images of the “Boxworks” and an almost circular depression (“Torote Bowl”) whose origin is not clear.
The environmental theme group (ENV) planned a Mastcam tau (to look at dust in the atmosphere) and a Navcam dust-devil survey (to look for dust devils!) for the first sol of the plan. On the second sol, we fill out the movies with Navcam movies looking toward the south of the crater (suprahorizon, cloud shadow, and zenith movies) and a Mastcam sky survey.
In between the movies on the second sol, our drive is planned to take us another 34 meters (about 112 feet)… but we will have to see how far our intrepid rover will make it on this tricky terrain. Slow and steady will win this race!
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Last Updated Mar 21, 2025 Related Terms
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Sols 4484-4485: Remote Sensing on a Monday
NASA’s Mars rover Curiosity acquired this image using its Left Navigation Camera on March 17, 2025 — sol 4483, or Martian day 4,483 of the Mars Science Laboratory mission — at 09:38:17 UTC. NASA/JPL-Caltech Written by Conor Hayes, Graduate Student at York University
Earth planning date: Monday, March 17, 2025
Last week I was in Houston, Texas, at the Lunar and Planetary Science Conference. The mid-March weather in Houston is often more like mid-summer weather here in Toronto, so it has been a bit of a shock coming home to temperatures that are hovering around freezing rather than being in the upper 20s (degrees Celsius, or the low to mid 80s for those of you still using Fahrenheit). Still, Toronto is positively balmy compared to Gale Crater, where temperatures usually range between minus 80°C and minus 20°C (or minus 110°F to minus 5°F) during this part of the year. These cold temperatures and their associated higher demands on the rover’s available power for heating are continuing to motivate many of the decisions that we make during planning.
We received the double good news this morning that the weekend’s drive completed successfully, including the mid-drive imaging of the other side of “Humber Park” that Michelle mentioned in Friday’s blog, and that our estimates of the weekend plan’s power consumption ended up being a little conservative. So we started planning exactly where we wanted to be, and with more power to play around with than we had expected. Yay!
The weekend’s drive left us parked in front of some rocks with excellent layering and interesting ripples that we really wanted to get a closer look at with MAHLI. (See the cover image for a look at these rocks as seen by Navcam.) Sadly, we also ended up parked in such a way that presented a slip hazard if the arm was unstowed. As much as we would have loved to get close-up images of these rocks, we love keeping Curiosity’s arm safe even more, so we had to settle for a remote sensing-only plan instead.
Both the geology and mineralogy (GEO) and the environmental science (ENV) teams took full advantage of the extra power gifted to us today to create a plan packed full of remote sensing observations. Because we’re driving on the first sol of this two-sol plan, any “targeted” observations, i.e. those where we know exactly where we want to point the rover’s cameras, must take place before the drive. The first sol is thus packed full of Mastcam and ChemCam observations, starting with a 14×3 Mastcam mosaic of the area in front of us that’s outside of today’s workspace. Individual targets then get some Mastcam love with mosaics of various ripple and layering features at “Verdugo Peak,” “Silver Moccasin Trail,” and “Jones Peak.” Mastcam and ChemCam also team up on a LIBS target, “Trancas Canyon,” and some more long-distance mosaics of Gould Mesa, a feature about 100 meters away from us (about 328 feet) that we’ll be driving to the south of as we continue to head toward the “boxwork” structures.
After a drive, there often aren’t many activities scheduled other than the imaging of our new location that we’ll need for the next planning day. However, in this plan ENV decided to take advantage of the fact that Navcam observations can take place at the same time that the rover is talking to one of the spacecraft that orbit Mars. This is a useful trick when power is tight as it allows us to do more science without adding additional awake time (since the rover needs to be awake anyway to communicate with the orbiters). Today, it’s being used to get some extra cloud observations right before sunset, a time that we don’t often get to observe. These observations include a zenith movie that looks straight up over the rover and a “phase function sky survey,” which takes a series of nine movies that form a dome around the rover to examine the properties of the clouds’ ice crystals.
The second sol of this plan is much more relaxed, as post-drive sols often are because we don’t know exactly where we’ll be after a drive. Today, we’ve just got our usual ChemCam AEGIS activity, followed by a pair of Navcam cloud and cloud shadow movies to measure the altitude of clouds over Gale. As always, we’ve also got our usual set of REMS, RAD, and DAN activities throughout this plan.
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Last Updated Mar 20, 2025 Related Terms
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Sols 4481-4483: Humber Pie
NASA’s Mars rover Curiosity acquired this image using its Front Hazard Avoidance Camera (Front Hazcam) on March 14, 2025 — sol 4480, or Martian day 4,480 of the Mars Science Laboratory mission — at 08:53:19 UTC. NASA/JPL-Caltech Written by Michelle Minitti, Planetary Geologist at Framework
Earth planning date: Friday, March 14, 2025
The rover successfully arrived at the “Humber Park” outcrop which, on this fine “Pi Day” on Earth, we could convince ourselves looked like a pie with a sandy interior and a rough and rocky crust. We can only hope our instruments are as excited to tuck into this outcrop as the Curiosity team is to eat our pizzas and favorite pies (for me, pumpkin) this afternoon and evening.
MAHLI gets a big serving of rock structures from the Humber Park “crust” with three separate imaging targets. One observation, at the target “Yerba Buena Ridge,” covers structures expressed across the front of the outcrop in the above image. A second target, “Sepulveda Pass,” has intriguing texture that warranted multiple flavors of stereo imaging. The final target, which MAHLI shared with APXS, was “South Fork.” It was the clearest place to put APXS down on the rough bedrock blocks.
ChemCam also feasted on rock chemistry from an array of targets with different textures. “Ridge Route” covered a low-lying bedrock slab with the fine layering we have seen consistently through the sulfate unit, while “Toyon Canyon” covered a lumpier portion of the Humber Park outcrop above Yerba Buena Ridge. The “Mount Lawlor” target was a mix of Ridge Route and Toyon Canyon — layered, but on a high-standing portion of the outcrop that also had some unusual chains of pits. ChemCam added two long distance mosaics on “Gould Mesa” to the menu, which captured a variety of structures on this impressive butte about 100 meters ahead of the rover.
Mastcam focused on covering the whole of Humber Park with a stereo mosaic but also added small mosaics across a trough in the sand and a bedrock block with potential cross bedding at “Rancho Los Feliz.” Because just imaging this side of Humber Park was not enough, Mastcam and Navcam worked closely with the rover drivers to plan a mid-drive mosaic of the other side of the outcrop so we fully capture Humber Park’s “crust.”
Our environmental observations were not just pie in the sky but will help us monitor the chemistry of and the amount of dust in the atmosphere, and record clouds and dust devils crossing above and around us.
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Last Updated Mar 18, 2025 Related Terms
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Sols 4477-4478: Bumping Back to Business
NASA’s Mars rover Curiosity acquired this image using its Right Navigation Camera on March 10, 2025 — sol 4476, or Martian day 4,476 of the Mars Science Laboratory mission — at 04:15:44 UTC. NASA/JPL-Caltech Written by Sharon Wilson Purdy, Planetary Geologist at the Smithsonian National Air and Space Museum
Earth planning date: Monday, March 10, 2025
The Curiosity rover is winding between the spectacular Gould mesa and Texoli butte through beautifully layered terrain. The end-of-drive target from last week’s plan was a rock with a knobby/bumpy texture that appears quite different from the typical surrounding bedrock. While this interesting rock was in our workspace today, we ended up being just a touch too close to do contact science. As a result, the science team decided to “bump back” (e.g., drive backwards) to get the rover in an ideal position to analyze and characterize this rock on Wednesday.
In the middle of the rover’s workspace today there was a large patch of soil and sand that MAHLI and APXS teamed up to analyze at a target named “Angeles Crest.” Nearby, Mastcam imaged troughs (depressions) along the axis of the sand ridge to understand how they formed. Mastcam had several other targets in the plan that imaged the workspace and surroundings including “Potrero John,” the knobby rock in the workspace, a rock with similar nodular textures in the distance named “Modjeska Peak,” and a light tan rock with a dome-like structure in the vicinity of “Humber Park.”
ChemCam selected a slab of bedrock and loose (“float”) rock in the workspace to characterize their geochemistry with the LIBS instrument at “Millard Canyon” and “Cajon Pass,” respectively. Off in the distance, the science team selected the face of Gould mesa and upper Texoli butte for ChemCam long distance RMI imaging to get a closer look at the rocks, fractures, and layering.
The environmental theme group scheduled several activities to look at clouds, document the atmospheric opacity, and measure the optical depth of the atmosphere and constrain aerosol scattering properties. We have lots of exciting data in hand and more on the road ahead!
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