19848 Yeungchuchiu

19848 Yeungchuchiu

Light-curve based 3D-model of Yeungchuchiu
Discovery [1]
Discovered by W. K. Yeung
Discovery site Desert Beaver Obs.
Discovery date 2 October 2000
Designations
MPC designation 19848 Yeungchuchiu
Named after
 Chu Chiu Yeung
(discoverer's father)[2]
2000 TR · 1998 KR38
1999 SY6
main-belt · Eos [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 34.33 yr (12,538 days)
Aphelion 3.2376 AU
Perihelion 2.7765 AU
3.0071 AU
Eccentricity 0.0767
5.21 yr (1,905 days)
56.470°
0° 11m 20.4s / day
Inclination 11.061°
54.760°
350.17°
Physical characteristics
Dimensions 11.69±0.55 km[4]
12.700±0.134[5]
12.90 km (calculated)[3]
13.242±0.282 km[6]
3.450±0.002 h[7]
3.4508±0.0003 h[8]
0.14 (assumed)[3]
0.170±0.020[4][5]
0.2107±0.0250[6]
S [3]
12.2[1][3][4] · 11.7[6]
12.227±0.002 (R)[8]
12.49±0.28[9]

    19848 Yeungchuchiu, provisional designation 2000 TR, is a stony Eos asteroid from the outer region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered by Canadian amateur astronomer William Yeung at the U.S. Desert Beaver Observatory in Arizona, on 2 October 2000. It is the largest minor planet found by the discoverer, just 1°.2 west of Jupiter.[10]

    The S-type asteroid is a member of the Eos family, an orbital group of more than 4,000 asteroids, which are known for mostly being of stony composition. It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,905 days). Its orbit has an eccentricity of 0.08 and an inclination of 11° with respect to the ecliptic.[1] The first precovery was taken at the Australian Siding Spring Observatory in 1982, extending the asteroid's observation arc by 18 years prior to its discovery.[10]

    In 2005, a photometric light-curve analysis by the discoverer at the Desert Eagle Observatory in Arizona, rendered a well-defined rotation period of 3.450±0.002 hours with a brightness variation of 0.70 in magnitude (U=3). The large amplitude suggests that the body is of non-spherical shape and that the long axis is almost twice as long as the short axis. It is likely that the rotational axis was almost perpendicular to the observation's line-of-sight.[7] A second light-curve was obtained at the Palomar Transient Factory in September 2010, and gave a concurring period of 3.4508±0.0003 hours with an amplitude of 0.63 in magnitude (U=2).[8]

    According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the asteroid measures 11.7 and 13.2 kilometers in diameter with an albedo for its surface of 0.17 and 0.21, respectively.[6][4] The Collaborative Asteroid Lightcurve Link also assumes an albedo of 0.21 and calculates a diameter of 12.9 kilometers for the stony asteroid.[3]

    The minor planet was named by the discoverer after his father, Chu Chiu Yeung (b. 1925), in gratitude for his unconditional support.[2] Naming citation was published on 9 March 2001 (M.P.C. 42368).[11]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 19848 Yeungchuchiu (2000 TR)" (2016-11-05 last obs.). Jet Propulsion Laboratory. Retrieved 3 December 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (19848) Yeungchuchiu. Springer Berlin Heidelberg. p. 859. ISBN 978-3-540-00238-3. Retrieved 1 January 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (19848) Yeungchuchiu". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    4. 1 2 3 4 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 17 May 2016.
    5. 1 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. arXiv:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 3 December 2016.
    6. 1 2 3 4 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016.
    7. 1 2 Yeung, Kwong W. (September 2006). "Lightcurve analysis for 19848 Yeungchuchiu". The Minor Planet Bulletin. 33 (3): 49. Bibcode:2006MPBu...33...49Y. ISSN 1052-8091. Retrieved 17 May 2016.
    8. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 17 May 2016.
    9. ↑ 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. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
    10. 1 2 "19848 Yeungchuchiu (2000 TR)". Minor Planet Center. Retrieved 1 January 2016.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

    External links

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