1098 Hakone

Located in the orbital region of the stony Eunomia family,^[6] Hakone is a non-family asteroid from the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.^[4][5] It orbits the Sun in the central asteroid belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,610 days). Its orbit has an eccentricity of 0.12 and an inclination of 13° with respect to the ecliptic.^[3]

Hakone was discovered by Japanese astronomer Okuro Oikawa at the old Tokyo Astronomical Observatory (389) on 5 September 1928.^[1] It was independently discovered by German astronomer Max Wolf at Heidelberg Observatory and Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula on 9 and 11 September 1928, respectively.^[2] The Minor Planet Center, however, only acknowledges the first discoverer.^[1] The asteroid was first observed as A906 RD at Taunton Observatory (803) on 16 September 1906. The body's observation arc begins the following month at the U.S. Naval Observatory, almost 22 years prior to its official discovery observation at Tokyo.^[1]

This minor planet was named after the volcanic Mount Hakone, located 80 kilometers from the discovering Tokyo Astronomical Observatory and near the Japanese town of Hakone. The mountain resort is known for its hot springs, Lake Ashi and its view of Mount Fuji, after which the asteroid 1584 Fuji was named. The official naming citation was prepared by astronomer Kōichirō Tomita.^[2]

In the SMASS classification, Hakone is a Xe-subtype, that transitions from the X-type the very bright E-type asteroids.^[3] It has also been characterized as a metallic M-type asteroid, by the Wide-field Infrared Survey Explorer.^[10]