Information:  - Charles Thomas Kowal (November 8, 1940  November 28, 2011) was an American astronomer known for his observations and discoveries in the Solar System. As a staff astronomer at Caltech's Mount Wilson and Palomar Mountain observatories between 1961 and 1984, he found the first of a new class of Solar System objects, the centaurs, discovered two moons of the planet Jupiter, and discovered or co-discovered a number of asteroids, comets and supernovae. He was awarded the James Craig Watson Medal for his contributions to astronomy in 1979.  - Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet. As minor planets in the outer Solar System were discovered and found to have volatile-based surfaces that resemble those of comets, they were often distinguished from asteroids of the asteroid belt. In this article, the term "asteroid" refers to the minor planets of the inner Solar System including those co-orbital with Jupiter.  - The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth crossing asteroids that have an orbital semi-major axis greater than that of the Earth (> 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU).  - 2063 Bacchus ( / bæks / BAK - s ) is an Apollo asteroid and Venus - and Mars - crosser asteroid . It was discovered on April 24 , 1977 , by Charles T. Kowal at the Palomar Observatory . In March 1996 radar observations were conducted at the Goldstone Observatory under the direction of JPL scientists Steven Ostro and Lance Benner , allowing the construction of a model of the object . Optical observations were conducted by Petr Pravec , Marek Wolf , and Lenka Šarounová during March and April 1996 . Bacchus is about 2.6 × 1.1 × 1.1 km in size and has a bilobate shape . Its spectral type is Sq. Its name derives from the Roman god Bacchus . On 31 March 1996 , Bacchus passed 0.0677525 AU ( 10,135,630 km ; 6,297,990 mi ) from Earth .    After reading the paragraphs above, we are interested in knowing the entity with which '2063 bacchus' exhibits the relationship of 'minor planet group'. Find the answer from the choices below.  Choices: - apollo asteroids  - asteroid belt
apollo asteroids