|Discovered by||C. H. F. Peters|
|Discovery date||June 28, 1886|
|Epoch 30 January 2005 (JD 2453400.5)|
|Aphelion||526.86 Gm (3.522 AU)|
|Perihelion||412.767 Gm (2.759 AU)|
|469.814 Gm (3.141 AU)|
|2032.78 d (5.57 a)|
Average orbital speed
|Dimensions||190.05 ± 6.82 km|
|Mass||(7.79 ± 0.43) × 1018 kg|
|2.16 ± 0.26 g/cm3|
259 Aletheia is a very large main-belt asteroid that was discovered by C. H. F. Peters on June 28, 1886, in Clinton, New York. It is named after the Greek goddess Aletheia. This asteroid is composed of primitive carbonaceous materials and is very dark in colour, darker than coal.
Richard P. Binzel and Schelte Bus further added to the knowledge about this asteroid in a lightwave survey published in 2003. This project was known as Small Main-belt Asteroid Spectroscopic Survey, Phase II or SMASSII, which built on a previous survey of the main-belt asteroids. The visible-wavelength (0.435-0.925 micrometre) spectra data was gathered between August 1993 and March 1999.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN 3-540-00238-3.
- Bus, S., Binzel, R. P. Small Main-belt Asteroid Spectroscopic Survey, Phase II. EAR-A-I0028-4-SBN0001/SMASSII-V1.0. NASA Planetary Data System, 2003.
- JPL Small-Body Database Browser
- Lightcurve Results
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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