16765 Agnesi

16765 Agnesi
Discovery [1]
Discovered by P. G. Comba
Discovery site Prescott Obs.
Discovery date 16 October 1996
Designations
MPC designation 16765 Agnesi
Named after
 Maria Agnesi
(mathematician)[2]
1996 UA
main-belt · Eunomia [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 19.59 yr (7,156 days)
Aphelion 2.9130 AU
Perihelion 2.3364 AU
2.6247 AU
Eccentricity 0.1098
4.25 yr (1,553 days)
271.55°
0° 13m 54.12s / day
Inclination 12.266°
17.764°
314.87°
Physical characteristics
Dimensions 4.132±0.247 km[4]
3.84 km (calculated)[3]
7.5458±0.0034 h[5]
0.2849±0.0250[4]
0.21 (assumed)[3]
S [3]
13.9[1][4]
13.30±0.00[6]
13.943±0.004 (R)[5]
14.39[3]

    16765 Agnesi, provisional designation 1996 UA, is a stony Eunomia asteroid from the middle region of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 16 October 1996, by Italian-American amateur astronomer Paul Comba at his private Prescott Observatory in the U.S. state of Arizona.[7]

    The asteroid is a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,553 days). Its orbit is tilted by 12° to the plane of the ecliptic and shows an eccentricity of 0.11.[1]

    According to the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 4.1 kilometers in diameter and its surface has an albedo of 0.28,[4] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 3.8 kilometers.[3] A rotational light-curve of this asteroid was obtained from photometric observations made at the U.S. Palomar Transient Factory in September 2013. The light-curve gave a rotation period of 7.5458±0.0034 hours with a brightness variation of 0.31 in magnitude (U=2).[5]

    The minor planet was named in honour of Italian Maria Gaetana Agnesi (1718–1799), who was the first Western woman to write a widely translated mathematics handbook and the first woman appointed to a professorship at a university in 1750.[2] Naming citation was published on 9 January 2001 (M.P.C. 41941).[8]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 16765 Agnesi (1996 UA)" (2016-04-18 last obs.). Jet Propulsion Laboratory. Retrieved May 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (16765) Agnesi. Springer Berlin Heidelberg. p. 840. ISBN 978-3-540-00238-3. Retrieved May 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (16765) Agnesi". Asteroid Lightcurve Database (LCDB). Retrieved May 2016.
    4. 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved May 2016.
    5. 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved May 2016.
    6. ↑ 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 May 2016.
    7. ↑ "16765 Agnesi (1996 UA)". Minor Planet Center. Retrieved May 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved May 2016.

    External links


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