186623

186623 is a minor planet located in the asteroid belt between Mars and Jupiter. It was discovered on October 17, 1977, by astronomer Eleanor F. Helin at the Palomar Observatory in California, USA. The asteroid is classified as a main-belt asteroid, which means it orbits the Sun within the asteroid belt's inner region. Its orbit has a semi-major axis of approximately 2.36 astronomical units (AU), with an eccentricity of about 0.18 and an inclination of roughly 2.6 degrees relative to the ecliptic plane.

The asteroid's diameter is estimated to be around 5 kilometers (3.1 miles), based on its absolute magnitude of 14.0. It completes one orbit around the Sun every 3.58 Earth years. The rotational period of 186623 is not well-determined, but it is believed to be relatively slow, possibly taking several hours to complete one rotation.

186623 has not been named, and it is designated by its provisional designation, 1977 UB. The naming process for minor planets typically involves proposing a name that is related to mythology, literature, or other cultural references, and then having it approved by the International Astronomical Union's Committee for Small Body Nomenclature. Once named, the asteroid would be referred to by its official name, which would replace the provisional designation.

The asteroid's physical characteristics, such as its composition and surface features, are not well-known. Spectroscopic observations could provide insights into its composition, while radar imaging or high-resolution imaging from spacecraft could reveal surface features. As of now, 186623 remains an object of interest for astronomers and planetary scientists, offering opportunities for further study and exploration.