On 5 March 2016, 2015 DR215 was recovered by the ESA Optical Ground Station at apparent magnitude 19, at solar elongations below 56 degrees.[5] It was observed to be about 0.5 degrees away from its predicted positions in March 2016.[5] The recovery observations significantly reduced the asteroid's orbital uncertainty, bringing its uncertainty parameter down from 9 to 3.[2][5]
As of 2022[update], 2015 DR215 has been observed for over 7 years, with a well-determined orbit at an uncertainty parameter of 0.[3]
Classification
2015 DR215 is one of a small number of Atira class asteroids that are orbiting entirely within the Earth's orbit.[6] The taxonomic class of 2015 DR215 in the Bus–DeMeo scheme is Sr, indicating a stony composition.[4]
^ abcdePerna, D.; Barucci, M. A.; Fulchignoni, M.; Popescu, M.; Belskaya, I.; Fornasier, S.; et al. (August 2018). "A spectroscopic survey of the small near-Earth asteroid population: Peculiar taxonomic distribution and phase reddening". Planetary and Space Science. 157: 82–95. arXiv:1803.08953. Bibcode:2018P&SS..157...82P. doi:10.1016/j.pss.2018.03.008.
^ abc"MPEC 2016-E72 : 2015 DR215". Minor Planet Electronic Circulars. Minor Planet Center. 7 March 2016. Retrieved 17 April 2021.
^de la Fuente Marcos, C.; de la Fuente Marcos, R. (August 2019). "Understanding the evolution of Atira-class asteroid 2019 AQ3, a major step towards the future discovery of the Vatira population". Monthly Notices of the Royal Astronomical Society. 487 (2): 2742–2752. arXiv:1905.08695. Bibcode:2019MNRAS.487.2742D. doi:10.1093/mnras/stz1437.
External links
2015 DR215 at NeoDyS-2, Near Earth Objects—Dynamic Site