6793 Palazzolo

6793 Palazzolo, provisional designation 1991 YE, is a stony asteroid from the middle region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 30 December 1991, by Italian amateur astronomers Ulisse Quadri and Luca Strabla at the Bassano Bresciano Observatory in northern Italy.[9] The asteroid was named after the Italian city of Palazzolo sull'Oglio.[2]

6793 Palazzolo
Discovery [1]
Discovered byU. Quadri
L. Strabla
Discovery siteBassano Bresciano Obs.
Discovery date30 December 1991
Designations
(6793) Palazzolo
Named after
Palazzolo sull'Oglio
(Italian city)[2]
1991 YE · 1982 YS2
1990 SZ23
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc33.90 yr (12,382 days)
Aphelion3.1007 AU
Perihelion2.2594 AU
2.6800 AU
Eccentricity0.1569
4.39 yr (1,603 days)
273.56°
0° 13m 28.56s / day
Inclination4.9244°
106.38°
46.196°
Physical characteristics
Dimensions8.01 km (calculated)[3]
9.882±0.051 km[4][5]
6.190±0.040 h[6]
6.2308±0.0072 h[3][7]
6.2323±0.0072 h[7]
0.083±0.004[4][5]
0.10 (assumed)[3]
S [3]
13.6[1] · 13.78±0.23[8] · 13.520±0.110[6] · 13.3[4] · 14.143±0.005 (S)[7] · 13.709±0.002 (R)[7]

    Orbit and classification

    Palazzolo orbits the Sun in the central main-belt at a distance of 2.3–3.1 AU once every 4 years and 5 months (1,603 days). Its orbit has an eccentricity of 0.16 and an inclination of 5° with respect to the ecliptic.[1]

    In 1982, the asteroid was first identified as 1982 YS2 at Crimea–Nauchnij. Its observation arc begins 1990, with its identification as 1990 SZ23 at ESO's La Silla Observatory, 1 year prior to its official discovery observation at Bassano Bresciano.[9]

    Physical characteristics

    Palazzolo is an assumed S-type asteroid.[3]

    Rotation period

    In 2012, a rotational lightcurve of Palazzolo was obtained from photometric observations at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 6.2308 hours with a brightness amplitude of 0.16 in magnitude (U=2).[7]

    Follow-up observations in 2013 and 2014, gave a similar period of 6.190 and 6.2323 hours with an amplitude of 0.16 and 0.14, respectively (U=2/2).[7][6]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Palazzolo has a diameter of 9.9 kilometers and an albedo of 0.083,[4][5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a diameter of 8.0 kilometers.[3]

    Naming

    This minor planet is named after the Italian city of Palazzolo sull'Oglio, located between Brescia and Bergamo, in northern parts of the country. Known for its industries, including the first Italian factories producing cement and buttons, the city is now famous for its of spinning machines and zippers. It was founded on the banks of river Oglio, with archaeological findings dating back to the Roman era.[2] The approved naming citation was published by the Minor Planet Center on 4 April 1996 (M.P.C. 26933).[10]

    References
    1. "JPL Small-Body Database Browser: 6793 Palazzolo (1991 YE)" (2016-11-15 last obs.). Jet Propulsion Laboratory. Retrieved 21 June 2017.
    2. Schmadel, Lutz D. (2007). "(6793) Palazzolo". Dictionary of Minor Planet Names – (6793) Palazzolo. Springer Berlin Heidelberg. p. 557. doi:10.1007/978-3-540-29925-7_6105. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (6793) Palazzolo". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016.
    5. 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:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 December 2016.
    6. Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 17 May 2016.
    7. 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 17 May 2016.
    8. 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
    9. "6793 Palazzolo (1991 YE)". Minor Planet Center. Retrieved 29 March 2016.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

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