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335 Roberta is a large main belt asteroid. It was discovered by German astronomer Anton Staus on September 1, 1892 in Heidelberg.<ref name="IAU_MPC"/> This was his only asteroid discovery.

Photometric observations of this asteroid from multiple sites during 2007 gave a light curve with a period of 12.054 ± 0.003 hours and a brightness variation of 0.13 ± 0.02 in magnitude. This agrees with a result reported in 1992, but differs from period estimates of 8.03 hours and 4.349 reported in 1987 and 2001, respectively.<ref name="Warner2007"/>

Under the SMASS classification taxonomy, Polana is listed as a B-type asteroid; a group that combines both the Tholen B and F types. The spectrum of this object suggests the presence of magnetite (Fe3O4), which gives it the spectrally-blue coloration that is a characteristic of this SMASS class. The spectrum of this asteroid also displays a band feature near 2.9 μm that indicate the presence of a hydrated mineral. This suggests that the asteroid has undergone significant water-based alteration.<ref name=aj140_3_692/>

335 Roberta was identified as one of three asteroids that were likely to be a parent body for chondrites along with 449 Hamburga and 304 Olga.<ref>Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996</ref> All three asteroids were known to have low-albedo (not reflect as much light) and be close to "meteorite producing resonances".<ref>Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996</ref> Chrondrites are the most common type of meteor found on Earth, accounting for over 80% of all meteors.<ref>ASU - Chondrites</ref> They are named for the tiny spherical silicate particles that are found inside them (those particles are called chondrules).<ref>ASU - Chondrites</ref>


(335) Roberta sections
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