1097 vicia, provisional designation 1928 pc, is an asteroid from the central regions of the asteroid belt, approximately 23 kilometers in diameter.discovered by karl reinmuth at the heidelberg observatory in 1928, the asteroid was later named after the flowering plant vicia, commonly known as vetches.on 15 and 22 august, the asteroid was independently discovered by soviet astronomer pelageya shajn at simeiz observatory on the crimean peninsula, and by english astronomer harry edwin wood at the johannesburg observatory in south africa, respectively.however, the minor planet center only recognizes the first discoverer.the asteroid was first identified as a907 vf at heidelberg in may 1907.the body's observation arc begins at heidelberg in august 1928, six nights after its official discovery observation.it orbits the sun in the central main belt at a distance of 1.9–3.4 au once every 4 years and 4 months (1,570 days).its orbit has an eccentricity of 0.29 and an inclination of 2° with respect to the ecliptic.asteroids in the central main belt with a semi-major axis between 2.6 and 2.7 au, are located in a transitional region where both stony and carbonaceous asteroids are frequent and generic assumptions are difficult.analysis of the fragmentary lightcurve gave a rotation period of 26.5 hours with a brightness variation of 0.08 magnitude, indicative for a spherical rather than irregular and elongated shape (u=1).as of 2017, however, no other lightcurve has been obtained and vicia's rotation period has not yet been secured.it is commonly known as vetches.the official naming citation was mentioned in the names of the minor planets by paul herget in 1955 (h 103).the list covered his discoveries with numbers between (1009) and (1200).this list also contained a sequence of 28 asteroids, starting with 1054 forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).
1097 vicia | periapsis | 2791420000000
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