836 Jole

836 Jole (prov. designation: or ) is a bright background asteroid from the inner regions of the asteroid belt. It was discovered on 23 September 1916, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The stony S-type asteroid has a rotation period of 9.6 hours and measures approximately 5.8 km in diameter. It was named after Iole, wife of Heracles from Greek mythology.

Orbit and classification
Located in the orbital region of the Flora family, Jole is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 3 months (1,184 days; semi-major axis of 2.19 AU). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic. The asteroid was first observed as A903 QA at Heidelberg Observatory on 24 August 1903, where the body's observation arc begins on the following night.

Naming
Based on Lutz Schmadel's own research, this minor planet was named from Greek mythology, after Iole, daughter of King Eurytus of Oechalia and wife by force of divine hero Heracles. The naming was not mentioned in The Names of the Minor Planets by Paul Herget in 1955.

Physical characteristics
In the SDSS-based taxonomy, Jole is a common, stony S-type asteroid.

Rotation period
In September 2010, a rotational lightcurve of Jole was obtained from photometric observations by Daniel Coley at the DanHenge Observatory at the Center for Solar System Studies. Lightcurve analysis gave a well-defined rotation period of $5.757 km$ hours with a brightness variation of $9.615 h$ magnitude (U=3).

Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Jole measures $0.194$ kilometers in diameter and its surface has an albedo of $9.615$. Alternative mean-diameters published by the WISE team includes ($0.37$) and ($5.757$) with corresponding albedos of ($0.194$) and ($5.142 km$). The Collaborative Asteroid Lightcurve Link assumes an albedo for a Florian asteroid of 0.24 and calculates a diameter of 6.21 kilometers based on an absolute magnitude of 13.2.