Astronomy:160 Una
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Short description: Main-belt asteroid
.png) 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 | |
| (160) Una | |
| Pronunciation | /ˈjuːnə/[1] |
| Minor planet category | Main belt |
| Orbital characteristics[2] | |
| 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) |
| 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° |
| 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)[2] 0.234 d (5.61 h)[3][4] |
| Geometric albedo | 0.0625±0.003[2] 0.063[5] |
| Physics | ~170 K |
| C[6] | |
| Absolute magnitude (H) | 9.08,[2] 8.95[7] |
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
- 160 Una at the JPL Small-Body Database
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