4349 Tibúrcio

4349 Tibúrcio
Discovery [1]
Discovered by W. Landgraf
Discovery site La Silla Obs. (ESO)
Discovery date 5 June 1989
Designations
MPC designation 4349 Tiburcio
Named after
 Julio Tibúrcio
(amateur astronomer)[2]
1989 LX · 1931 AE
1951 YV1 · 1959 SS
1968 WD · 1982 BJ4
1984 MJ · 1986 AZ2
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 84.94 yr (31,025 days)    
Aphelion 3.2516 AU
Perihelion 1.9853 AU
2.6184 AU
Eccentricity 0.2418
4.24 yr (1,548 days)
45.438°
Inclination 10.737°
90.526°
280.22°
Physical characteristics
Dimensions 26.14±1.8 km (IRAS:4)[1]
24.91±0.28 km[4]
28.091±0.371 km[5]
26.45±10.54 km[6]
26.12 km (derived)[3]
16.284±0.003 h[lower-alpha 1]
0.0540±0.008 (IRAS:4)[1]
0.061±0.002[4]
0.0345±0.0053[5]
0.040±0.041[6]
0.0493 (derived)[3]
S [3]
11.8[1]

    4349 Tibúrcio, provisional designation 1989 LX, is a dark asteroid from the middle region of the asteroid belt, about 26 kilometers in diameter. It was discovered by German astronomer Werner Landgraf at ESO's La Silla Observatory in northern Chile, on 5 June 1989.[7] With 53.5 degrees, it had been the asteroid with the smallest angular distance from the Sun ever discovered.[8]:395

    The asteroid orbits the Sun at a distance of 2.0–3.3 AU once every 4 years and 3 months (1,548 days). Its orbit shows an eccentricity of 0.24 and an inclination by 11 degrees from the plane of the ecliptic. A photometric light-curve analysis in 2010, rendered a well-defined rotation period of 16.284±0.003 hours with a brightness amplitude of 0.40 in magnitude.[lower-alpha 1]

    According to the 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, the asteroid's surface has a low albedo in the range between 0.034 and 0.061.[1][4][5][6] Although the Collaborative Asteroid Lightcurve Link (CALL) agrees with the space-based observations, and derives a low albedo of 0.049, it classifies the asteroid as a stony S-type, rather than a carbonaceous body.[3]

    The minor planet was named in honor of Julio Cesar dos Santos Tibúrcio, a Brazilian amateur astronomer and student of information science.[2]

    References

    1. 1 2 Higgins (2011) web: rotation period 16.284±0.003 hours with a brightness amplitude of 0.40 mag. Quality Code: U=3 (Denotes a secure result within the precision given and no ambiguity.). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (4349) Tiburcio
    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 4349 Tiburcio (1989 LX)" (2015-12-20 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (4349) Tibúrcio. Springer Berlin Heidelberg. p. 373. ISBN 978-3-540-00238-3. Retrieved January 2016.
    3. 1 2 3 4 5 "LCDB Data for (4349) Tiburcio". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
    4. 1 2 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. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved January 2016.
    5. 1 2 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. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved January 2016.
    6. 1 2 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved January 2016.
    7. ↑ "4349 Tiburcio (1989 LX)". Minor Planet Center. Retrieved January 2016.
    8. ↑ Marsden, B. G. (December 1993). "Asteroid and Comet Surveys". Astronomy from wide-field imaging: proceedings of the 161st Symposium of the International Astronomical Union: 385. Bibcode:1994IAUS..161..385M. Retrieved January 2016.

    External links


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