160 Una

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160 Una
160Una (Lightcurve Inversion).png
A three-dimensional model of 160 Una based on its light curve.
Discovery
Discovered by C. H. F. Peters
Discovery date February 20, 1876
Designations
Minor planet category Main belt
Orbital characteristics[1]
Epoch January 30, 2005 (JD 2453400.5)
Aphelion 435.556 Gm (2.912 AU)
Perihelion 380.561 Gm (2.544 AU)
408.058 Gm (2.728 AU)
Eccentricity 0.067
1645.485 d (4.51 a)
18.01 km/s
308.565°
Inclination 3.824°
8.856°
49.974°
Physical characteristics
Dimensions 81.2 km
Mass 5.6×1017 kg (assumed)
Mean density
2.0? g/cm³
0.0227 m/s²
0.0429 km/s
0.234 d (5.61[2] h) 1
Albedo 0.063 3
Temperature ~170 K
Spectral type
C 2
8.95[3]

160 Una is a fairly large and dark, primitive Main belt asteroid that was discovered by German-American astronomer C. H. F. Peters on February 20, 1876 in Clinton, New York.[4] It is named after a character in Edmund Spenser's epic poem The Faerie Queene (1590).

In the Tholen classification system it is categorized as a CX-type, while the Bus asteroid taxonomy system lists it as an Xk asteroid.[5] Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 5.61 ± 0.01 hours.[2]

References[edit]

  1. ^ Yeomans, Donald K., "160 Una", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25. 
  2. ^ a b di Martino, M. et al. (February 1994), "Lightcurves and rotational periods of nine main belt asteroids", Icarus 107 (2): 269–275, Bibcode:1994Icar..107..269D, doi:10.1006/icar.1994.1022. 
  3. ^ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 34: 113–119, Bibcode:2007MPBu...34..113W. 
  4. ^ "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), retrieved 2013-04-07. 
  5. ^ DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-04-08.  See appendix A.

External links[edit]