According to our research engine: Mercury has a rotational period of 58.646 Earth days and an orbital period of 0.241 earth years.
http://planets.findthedata.com/q/1/1321/What-is-Mercury-s-rotational-period
It takes Mercury about 59 Earth days to spin once on its axis (the rotation period), and about 88 Earth days to complete one orbit about the Sun. However, the length of the day on Mercury (sunrise to ...more.
http://www.windows2universe.org/mercury/News_and_Discovery/Merc_orbit_reson.html
Mercury's Orbital Resonance. It takes Mercury about 59 Earth days to spin once on its axis (the rotation period), and about 88 Earth days to complete one orbit about the Sun. However, the length of the day on Mercury (sunrise to sunrise) is 176 Earth days.
http://www.windows2universe.org/mercury/News_and_Discovery/Merc_orbit_reson.html
The orbit of Mercury is the most eccentric of the planets in our Solar System. The planet has an orbital period of 87.969 Earth days. At perihelion it is 46,001,200 km from the Sun and at aphelion it is 69,816,900 km, a difference of 23,815,700 km giving it an eccentricity of 0.21. Mercury’s orbit is inclined by 7 degrees to Earth’s ecliptic.
http://www.universetoday.com/14009/orbit-of-mercury/
One day on Mercury equals 176 earth-days. This drawing follows the position of a single point, in yellow, as Mercury spins (day to night) and as Mercury travels around the Sun (year). The yellow point faces the Sun only once every 176 earth-days or two Mercury years.
http://www.windows2universe.org/mercury/News_and_Discovery/Merc_orbit_reson.html
The Law of Areas: A line that connects a planet to the sun sweeps out equal areas in equal times. 3. The Law of Periods: The square of the period of any planet is proportional to the cube of the semimajor axis of its orbit. Kepler's laws were derived for orbits around the sun, but they apply to satellite orbits as well.
http://hyperphysics.phy-astr.gsu.edu/hbase/kepler.html
There is a direct correlation between the orbital period and rotational period. This is called spin-orbit resonance. For every 2 orbits of Mercury around the Sun, it rotates three times on its axis. This is known as a 3:2 spin-orbit resonance.
http://www.universetoday.com/14009/orbit-of-mercury/
The orbital period is the time taken for a given object to make one complete orbit around another object. When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars. There are several kinds of orbital periods for objects around the Sun (or other celestial objects): 1  The sidereal period is the temporal cycle that it takes an object to make a full orbit, relative to the stars. 2  This is the orbital period in an inertial (non-rotating) frame of reference.
https://en.wikipedia.org/wiki/Orbital_period
All planets move in elliptical orbits, with the sun at one focus. This is one of Kepler's laws. The elliptical shape of the orbit is a result of the inverse square force of gravity. The eccentricity of the ellipse is greatly exaggerated here.
http://hyperphysics.phy-astr.gsu.edu/hbase/kepler.html
The square of the period of any planet is proportional to the cube of the semimajor axis of its orbit. This is one of Kepler's laws .This law arises from the law of gravitation. Newton first formulated the law of gravitation from Kepler's 3rd law.
http://hyperphysics.phy-astr.gsu.edu/hbase/kepler.html
what is mercury's orbital period
Mercury's orbital period is 88 days.