It didn't, it flew by Venus October 19, 1967.
Mariner 9 orbited Mars in November 13, 1971.
The Mariner 9.
May 19 - Mars probe program: Mars 2 is launched by the Soviet Union.May 30 - Mariner program: Mariner 9 is launched toward Mars.Nov 13 - Mariner program: Mariner 9 becomes the first spacecraft to enter Mars orbit successfully.
November 30, 1971
Mariner 9 orbited Mars from November 14, 1971, to October 27, 1972, making it the first spacecraft to orbit another planet. It conducted extensive studies of the Martian surface and atmosphere, sending back thousands of images of the planet.
Mariner 9 was sent out by NASA to orbit Mars and study the planet's surface, atmosphere, and climate. It was the first spacecraft to orbit another planet and provided valuable data on Mars, including detailed images of the surface that revealed features like volcanoes and valleys.
Mars has 2 satellites that orbit around the planet. These 2 satellites are not man made. These satellites are naturally made of rock.
Mariner 9 became the first spacecraft to orbit another planet, Mars, on November 14, 1971. It was launched by NASA on May 30, 1971, and successfully entered Mars' orbit after a journey of about 167 days. The mission provided groundbreaking data and images of the Martian surface, revealing features like volcanoes, canyons, and evidence of past water flow.
Mariner 4 was the first ship to visit Mars.
Mariner 9 was a NASA space probe that became the first spacecraft to orbit another planet when it entered orbit around Mars in 1971. It mapped 85% of the Martian surface, providing valuable data and images that revolutionized our understanding of the planet.
None, since satellites don't "land", they orbit. There are 6 landers and rovers on the Martian surface, 2 of which were lost at arrival. NASA reports 3 types of Martian Exploration missions: (1) Fly-by missions: Mariner 3, Mariner 4, Mariner 6, Mariner 7 (2) Orbiter missions (the satellites): Mariner 8, Mariner 9, Viking 1, Viking 2, Mars Observer, Mars Global Surveyor, Mars Climate Orbiter, 2001 Mars Odyssey, Mars Express, Mars Reconnaissance Orbiter (3) Lander and Rover missions: Viking 1 Lander, Viking 2 Lander, Pathfinder Rover, Polar Lander (lost), Deep Space 2 (lost), Spirit Rover, Opportunity Rover, Phoenix Mars Science Laboratory Rover is scheduled to launch in 2011.
Mariner 3 was launched on November 5, 1964. However, the mission was not successful due to a rocket malfunction, causing the spacecraft to eventually miss its intended trajectory to Mars.