209 Dido is classified as a C-type asteroid and is probably composed of carbonaceous materials. Like many asteroids of its type, it has an extremely low albedo. Photometric observations at the Palmer Divide Observatory during 2005 showed a rotation period of 5.7366±0.0005 hours with a brightness variation of 0.17±0.02 in magnitude.[6] The pole orientation in ecliptic coordinates, as determined from multiple light curve studies, is (βp, λp) = (120°±6°, 66°±7°).[7]
209 Dido has been observed to occult 4 stars between 2005 and 2023.
References
^Webster, Noah (1884). A Practical Dictionary of the English Language.
^ a bCarry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
^ a bWarner, Brian D. (December 2005), "Asteroid lightcurve analysis at the Palmer Divide Observatory - spring 2005", The Minor Planet Bulletin, 32 (4): 90–92, Bibcode:2005MPBu...32...90W.
^Zhang, Xi-Liang; et al. (December 2007). "Shapes and Pole Orientations of Asteroids (360) Carlova and (209) Dido". Earth, Moon, and Planets. 101 (3–4): 189–194. Bibcode:2007EM&P..101..189Z. doi:10.1007/s11038-008-9229-z.
External links
Lightcurve plot of 209 Dido, Palmer Divide Observatory, B. D. Warner (2005)
Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
209 Dido at AstDyS-2, Asteroids—Dynamic Site
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info