The US Space Agency says its Perseverance rover is perfectly equipped to land on Mars.
The robot is heading down on Thursday at a crater called Jezero north of the equator.
Its mission goals will be to search for signs of past life, collect rock samples, and prepare them for a return to Earth in 2030.
Engineers have told reporters that they are not planning to make further changes to the robot’s path given the current situation.
All navigation data indicate that it is on track to intersect Mars at the intended moment in time and space.
"We still have the ability to do another maneuver if we need to, but we don't expect to have to," NASA's deputy director of the Perseverance Project, Jennifer Trosbear, told BBC News.
Tuesday saw the perseverance duck less than half a million kilometers to travel.
A signal from the probe that says its protective capsule has clashed with the Martian atmosphere should reach Earth around 20:48 GMT on Thursday. If all goes well, the confirmation that the robot is on land safely will come in approximately seven minutes.
Mission control at the agency's Jet Propulsion Laboratory in California will follow up on late events.
The current separation of 190 meters between the planets means that all communications take more than 11 minutes to arrive, making it impossible for engineers to intervene if something goes wrong. Autonomous systems to persevere are responsible.
To the ordinary eye, the robot looks exactly like the Curiosity rover that NASA put out at Gale Crater in 2012. But "under the hood," the new vehicle is a completely different one, with an improved set of tools that will enable it to address a new set of scientific questions.
Chief engineer Adam Stelzner said hope is also stronger than Curiosity
He explained that "the wheels of Curiosity were subjected to severe blows on the surface of Mars because of these sharp rocks called ventilation holes." `` Tenacity has a beautiful tread pattern. This tread pattern not only makes its wheels stronger against rocks, but also gives them better performance on sandy terrain."
Fans can also look forward to an upgraded multimedia experience. This mission holds more than 20 cameras and two microphones. Two of the cameras are on a small helicopter that will attempt to fly through the disorganized atmosphere of Mars.
This will be NASA's first mission to Mars - since the Viking landing in the 1970s - to directly look for signs of life.
The intervening years have been all about habitability - about whether past conditions might have been a good place to host biology. This question is convincingly settled.
Missions such as Spirit and Opportunity Rovers in the 2000s, and more recently the Curiosity robot, have shown that Mars was once warmer and wetter. It had all the basic chemical requirements to support the microbial organism - if any.
The task of persevering now is to search for traces that this primitive life may have left in what is believed to be the sediments of a great lake at Jezero.
"We know that these kinds of things were present on Earth three and a half billion years ago. The question is, were they also present on the surface of Mars at the bottom of lakes three and a half billion years ago?"
The truth is, it would be difficult for perseverance to prove it conclusively on the spot.
It's common for examples of ancient life on Earth to be hotly debated, which is why the rover will pack its most interesting rock finds into tiny tubes to be sent home later in the decade.
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