Astronomy:4349 Tibúrcio

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Short description: Asteroid
4349 Tibúrcio
Discovery [1]
Discovered byW. Landgraf
Discovery siteLa Silla Obs.
Discovery date5 June 1989
Designations
(4349) Tiburcio
Named afterJúlio Tibúrcio
(Brazilian amateur astronomer)[2]
1989 LX · 1931 AE
1951 YV1 · 1959 SS
1968 WD · 1982 BJ4
1984 MJ · 1986 AZ2
Minor planet categorymain-belt · (middle) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc86.31 yr (31,526 days)
|{{{apsis}}}|helion}}3.2534 AU
|{{{apsis}}}|helion}}1.9884 AU
2.6209 AU
Eccentricity0.2413
Orbital period4.24 yr (1,550 days)
Mean anomaly230.56°
Mean motion0° 13m 56.28s / day
Inclination10.740°
Longitude of ascending node90.259°
281.06°
Physical characteristics
Dimensions24.91±0.28 km[4]
26.12 km (derived)[3]
26.14±1.8 km (IRAS:4)[1]
26.397±0.117[5]
26.45±10.54 km[6]
28.091±0.371 km[7]
29.67±8.21 km[8]
30.23±7.05 km[9]
Rotation period16.284±0.003 h[lower-alpha 1]
Geometric albedo0.0345±0.0053[7]
0.035±0.004[5]
0.040±0.041[6]
0.04±0.02[8]
0.04±0.01[9]
0.0493 (derived)[3]
0.0540±0.008 (IRAS:4)[1]
0.061±0.002[4]
X [10] · S [3]
Absolute magnitude (H)11.7[4][7][8] · 11.8[1][3] · 11.94±0.44[10] · 12.00[6] · 12.11[9]


4349 Tibúrcio, provisional designation 1989 LX, is a dark asteroid from the central region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 5 June 1989, by German astronomer Werner Landgraf at ESO's La Silla Observatory in northern Chile.[11]

With 53.5°, it had been the asteroid with the smallest angular distance from the Sun ever discovered.[12]: 395  It was later named after Brazilian amateur astronomer Júlio Tibúrcio.[2]

Orbit and classification

Tibúrcio orbits the Sun in the central main-belt at a distance of 2.0–3.3 AU once every 4 years and 3 months (1,550 days). Its orbit has an eccentricity of 0.24 and an inclination of 11° with respect to the ecliptic.[1]

One day before its first identification as 1931 AE, a precovery was taken at Lowell Observatory in 1931, extending the body's observation arc by 58 years prior to its official discovery at La Silla.[11]

Physical characteristics

The asteroid has been characterized as an X-type asteroid by Pan-STARRS' large-scale photometric survey.[10]

Rotation period

A rotational lightcurve of Tibúrcio was obtained from photometric observations by astronomer David Higgins at the Australian Hunters Hill Observatory (E14) in October 2010. Lightcurve analysis gave a well-defined rotation period of 16.284 hours with a brightness variation of 0.40 magnitude ({{{1}}}).[lower-alpha 1]

Diameter and albedo

According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its NEOWISE mission, Tibúrcio measures between 24.9 and 30.23 kilometers in diameter, and its surface has a low albedo between 0.034 and 0.061.[1][4][5][6][7][8][9]

Collaborative Asteroid Lightcurve Link assumes an albedo of 0.049 and calculates a diameter of 26.1 kilometers with an absolute magnitude of 11.8.[3]

Naming

This minor planet was named after Brazilian amateur astronomer and student of information science, Júlio César dos Santos Tibúrcio.[2] The official naming citation was published by the Minor Planet Center on 8 June 1990 (M.P.C. 16445).[13]

Notes

  1. ↑ 1.0 1.1 Higgins (2011) web: rotation period 16.284±0.003 hours with a brightness amplitude of 0.40 mag. Quality Code (U) of 3 (Denotes a secure result within the precision given and no ambiguity.). Summary figures for (4349) Tiburcio at Collaborative Asteroid Lightcurve Link (CALL)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 4349 Tiburcio (1989 LX)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004349. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(4349) Tibúrcio". Dictionary of Minor Planet Names – (4349) Tibúrcio. Springer Berlin Heidelberg. p. 373. doi:10.1007/978-3-540-29925-7_4301. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (4349) Tiburcio". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4349%7CTiburcio. 
  4. ↑ 4.0 4.1 4.2 4.3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  5. ↑ 5.0 5.1 5.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 5 December 2016. 
  6. ↑ 6.0 6.1 6.2 6.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 3 August 2016. 
  7. ↑ 7.0 7.1 7.2 7.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 3 August 2016. 
  8. ↑ 8.0 8.1 8.2 8.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N. Retrieved 20 June 2017. 
  9. ↑ 9.0 9.1 9.2 9.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N. 
  10. ↑ 10.0 10.1 10.2 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 3 August 2016. 
  11. ↑ 11.0 11.1 "4349 Tiburcio (1989 LX)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4349. 
  12. ↑ Marsden, B. G. (December 1993). "Asteroid and Comet Surveys". Astronomy from Wide-field Imaging: Proceedings of the 161st Symposium of the International Astronomical Union 161: 385. Bibcode: 1994IAUS..161..385M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1994IAUS..161..385M. Retrieved 3 January 2016. 
  13. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 



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