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Una (minor planet designation: 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.[8] It is named after a character in Edmund Spenser's epic poem The Faerie Queene (1590).

160 Una
A three-dimensional model of 160 Una based on its light curve.
Discovery
Discovered byC. H. F. Peters
Discovery date20 February 1876
Designations
MPC designation
(160) Una
Pronunciation/ˈjuːnə/[1]
Minor planet category
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc118.30 yr (43209 d)
Aphelion2.90877 AU (435.146 Gm)
Perihelion2.54727 AU (381.066 Gm)
Semi-major axis
2.72802 AU (408.106 Gm)
Eccentricity0.066257
Orbital period (sidereal)
4.51 yr (1645.8 d)
Average orbital speed
18.01 km/s
Mean anomaly
144.472°
Mean motion
0° 13m 7.471s / day
Inclination3.82512°
Longitude of ascending node
8.60989°
Argument of perihelion
52.8418°
Earth MOID1.56031 AU (233.419 Gm)
Jupiter MOID2.30107 AU (344.235 Gm)
TJupiter3.349
Physical characteristics
Dimensions81.24±2.1 km
Mass5.6×1017 kg (assumed)
Mean density
2.0? g/cm3
Equatorial surface gravity
0.0227 m/s2
Equatorial escape velocity
0.0429 km/s
Synodic rotation period
11.033 h (0.4597 d)[2]
0.234 d (5.61 h)[3][4]
Geometric albedo
0.0625±0.003[2]
0.063[5]
Temperature~170 K
Spectral type
C[6]
Absolute magnitude (H)
9.08,[2] 8.95[7]

    In the Tholen classification system it is categorized as a CX-type, while the Bus asteroid taxonomy system lists it as an Xk asteroid.[9] 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.[3]


    References


    1. Benjamin Smith (1903) The Century Dictionary and Cyclopedia
    2. Yeomans, Donald K., "160 Una", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. 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.
    4. "Lightcurves and map data on numbered asteroids N° 1 to 52225". Archived from the original on 27 November 2005. Retrieved 3 November 2008.
    5. "Infrared Astronomical Satellite (IRAS)". Archived from the original on 24 February 2005. Retrieved 24 February 2005.
    6. http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT [bare URL plain text file]
    7. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34 (4): 113–119, Bibcode:2007MPBu...34..113W.
    8. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    9. DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.



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    На других языках

    [de] (160) Una

    (160) Una ist ein Asteroid des Hauptgürtels, der am 20. Februar 1876 von dem deutsch-US-amerikanischen Astronomen Christian Heinrich Friedrich Peters entdeckt wurde.
    - [en] 160 Una

    [es] (160) Una

    (160) Una es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 20 de febrero de 1876 por Christian Heinrich Friedrich Peters desde el observatorio Litchfield de Clinton, Estados Unidos. Está nombrado por Una, un personaje del poema La reina hada del escritor inglés Edmund Spenser (1552-1599).[2]

    [ru] (160) Уна

    (160) Уна (англ. Una) — довольно большой астероид главного пояса, с очень низким альбедо поверхности. Он был открыт 20 февраля 1876 года германо-американским астрономом К. Г. Ф. Петерсом в Клинтоне, США и назван в честь героини поэмы Эдмунда Спенсера «Королева фей» (1590)[1].


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