160 Una

160 Una
	A three-dimensional model of 160 Una based on its light curve.
Discovery
Discovered by	C. H. F. Peters
Discovery date	20 February 1876
Designations
MPC designation	(160) Una
Pronunciation	/ˈjuːnə/
Minor planet category	Main belt
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	118.30 yr (43209 d)
\|{{{apsis}}}\|helion}}	2.90877 astronomical unit\|AU (435.146 Gm)
\|{{{apsis}}}\|helion}}	2.54727 AU (381.066 Gm)
Semi-major axis	2.72802 AU (408.106 Gm)
Eccentricity	0.066257
Orbital period	4.51 yr (1645.8 d)
Average Orbital speed	18.01 km/s
Mean anomaly	144.472°
Mean motion	0° 13m 7.471s / day
Inclination	3.82512°
Longitude of ascending node	8.60989°
\|{{{apsis}}}\|helion}}	52.8418°
Earth MOID	1.56031 AU (233.419 Gm)
Jupiter MOID	2.30107 AU (344.235 Gm)
TJupiter	3.349
Physical characteristics
Dimensions	81.24±2.1 km
Mass	5.6×1017 kg (assumed)
Mean density	2.0? g/cm3
Equatorial surface gravity	0.0227 m/s2
Equatorial escape velocity	0.0429 km/s
Rotation period	11.033 h (0.4597 d); 0.234 d (5.61 h)
Geometric albedo	0.0625±0.003; 0.063
Physics	~170 K
Spectral type	C
Absolute magnitude (H)	9.08, 8.95

Short description: Main-belt asteroid

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).

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

↑ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
↑ ^2.0 ^2.1 ^2.2 ^2.3 Yeomans, Donald K., "160 Una", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=160, retrieved 12 May 2016.
↑ ^3.0 ^3.1 di Martino, M. et al. (February 1994), "Lightcurves and rotational periods of nine main belt asteroids", Icarus 107 (2): 269–275, doi:10.1006/icar.1994.1022, Bibcode: 1994Icar..107..269D.
↑ "Lightcurves and map data on numbered asteroids N° 1 to 52225". Archived on 2005-11-27. Error: If you specify |archivedate=, you must also specify |archiveurl=. http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm. Retrieved 2008-11-03.
↑ "Infrared Astronomical Satellite (IRAS)". Archived from the original on 2005-02-24. https://web.archive.org/web/20050224095554/http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html. Retrieved 2005-02-24.
↑ Asteroid Lightcurve Data File, Updated March 1, 2001
↑ 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.
↑ "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html, retrieved 2013-04-07.
↑ DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, doi:10.1016/j.icarus.2009.02.005, Bibcode: 2009Icar..202..160D, archived from the original on 2014-03-17, https://web.archive.org/web/20140317200310/https://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016/j.icarus.2009.02.005.pdf, retrieved 2013-04-08. See appendix A.

External links

2011-Jan-24 Occultation / (2011 Asteroidal Occultation Results for North America)
160 Una at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
160 Una at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[1] Benjamin Smith (1903) The Century Dictionary and Cyclopedia

[JPL-2] 2.0 ^2.1 ^2.2 ^2.3 Yeomans, Donald K., "160 Una", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=160, retrieved 12 May 2016.

[diMartino1994-3] 3.0 ^3.1 di Martino, M. et al. (February 1994), "Lightcurves and rotational periods of nine main belt asteroids", Icarus 107 (2): 269–275, doi:10.1006/icar.1994.1022, Bibcode: 1994Icar..107..269D.

[4] "Lightcurves and map data on numbered asteroids N° 1 to 52225". Archived on 2005-11-27. Error: If you specify |archivedate=, you must also specify |archiveurl=. http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm. Retrieved 2008-11-03.

[5] "Infrared Astronomical Satellite (IRAS)". Archived from the original on 2005-02-24. https://web.archive.org/web/20050224095554/http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html. Retrieved 2005-02-24.

[6] Asteroid Lightcurve Data File, Updated March 1, 2001

[Warner2007-7] 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.

[IAU_MPC-8] "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html, retrieved 2013-04-07.

[DeMeo2009-9] DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, doi:10.1016/j.icarus.2009.02.005, Bibcode: 2009Icar..202..160D, archived from the original on 2014-03-17, https://web.archive.org/web/20140317200310/https://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016/j.icarus.2009.02.005.pdf, retrieved 2013-04-08. See appendix A.