associated with the presence of tholins, polymer-like organic compounds, formed by long exposures to solar and cosmic radiation. Based on a generic magnitude-to-diameter conversion, measures approximately in diameter, for an assumed albedo of 0.9 and an magnitude of 7.6. According to Mike Brown, who estimates a mean-diameter of , the object is too small for being considered a dwarf planet candidate ("probably not"). As of 2021, no rotational lightcurve for this body has been obtained from photometric observations. Its rotation period, pole and shape remain unknown. References External links List of Transneptunian Objects, Minor Planet Center (118378) 1999 HT11, Small Bodies Data Ferret Discovery Circumstances: Numbered Minor Planets (115001)-(120000), Minor Planet Center 118378 118378 19990417