The most recent satellite to reach Mars was Hope, launched by the United Arab Emirates in July 2020 and entering Mars orbit in February 2021.

However, there are other missions currently operating at Mars, including:

* Perseverance rover (NASA, landed February 2021)

* Tianwen-1 orbiter and Zhurong rover (China, landed May 2021)

* Mars Reconnaissance Orbiter (NASA, orbiting since 2006)

* Mars Odyssey (NASA, orbiting since 2001)

* MAVEN (NASA, orbiting since 2014)

* ExoMars Trace Gas Orbiter (ESA, orbiting since 2016)

So, depending on what you're looking for, the answer could be different!