160 Una is a fairly large and dark, primitive

Main belt The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids ...

asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...

that was discovered by German-American astronomer C. H. F. Peters on February 20, 1876, in Clinton, New York. It is named after a character in

Edmund Spenser Edmund Spenser (; – 13 January 1599 Old Style and New Style dates, O.S.) was an English poet best known for ''The Faerie Queene'', an epic poem and fantastical allegory celebrating the House of Tudor, Tudor dynasty and Elizabeth I. He is re ...

's epic poem ''

The Faerie Queene ''The Faerie Queene'' is an English epic poem by Edmund Spenser. Books IIII were first published in 1590, then republished in 1596 together with books IVVI. ''The Faerie Queene'' is notable for its form: at over 36,000 lines and over 4,000 sta ...

'' (1590). This minor planet is orbiting the

Sun The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light a ...

at a distance of with an

eccentricity Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-Centre (geometry), center, in geometry * Eccentricity (g ...

of 0.07. The

orbital plane The orbital plane of a revolving body is the geometric plane in which its orbit lies. Three non-collinear points in space suffice to determine an orbital plane. A common example would be the positions of the centers of a massive body (host) a ...

is inclined at an angle of 3.83° to the

plane of the ecliptic The ecliptic or ecliptic plane is the orbital plane of Earth around the Sun. It was a central concept in a number of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. From the perspe ...

. In the

Tholen classification An asteroid spectral type is assigned to asteroids based on their reflectance spectrum, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition. For small bodies that are not internally different ...

system it is categorized as a CX-type, while the Bus asteroid taxonomy system lists it as an Xk asteroid. Photometric observations of this asteroid made at the

Torino Observatory The Observatory of Turin (, also known as Pino Torinese; obs. code: 022) is an astronomical observatory owned and operated by Italy's National Institute for Astrophysics (, INAF). It is located on the top of a hill in the town of Pino Torinese n ...

in Italy during 1990–1991 were used to determine a synodic

rotation period In astronomy, the rotation period or spin period of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the '' sidereal rotation period'' (or ''sidereal day''), i.e., the time that the objec ...

of 5.61 ± 0.01 hours. It has an estimated diameter of about .

References

External links

2011-Jan-24 Occultation

* * 000160 Discoveries by Christian Peters Named minor planets 000160 000160 18760220 {{C-beltasteroid-stub