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. Bibcode2011PASJ...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. Bibcode2011ApJ...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. Bibcode2012ApJ...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. Bibcode2011ApJ...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. Bibcode2015ApJ...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. Bibcode2016AJ....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. Bibcode2015Icar..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. Bibcode1994IAUS..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. 

External links