1917 Cuyo

1917 Cuyo (prov. designation: 1968 AA) is an stony asteroid and near-Earth object of the Amor group, approximately 5.7 kilometers (3.5 miles) in diameter. It was discovered on 1 January 1968, by astronomer Carlos Cesco and A. G. Samuel at El Leoncito Observatory, Argentina.[3]

1917 Cuyo
Modelled shape of Cuyo from its lightcurve
Discovery [1]
Discovered byC. U. Cesco
A. G. Samuel
Discovery siteEl Leoncito Complex
Discovery date1 January 1968
Designations
(1917) Cuyo
Named after
Universidad Nacional de Cuyo[2]
1968 AA
NEO · Amor [1][3]
Orbital characteristics [3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc65.08 yr (23,769 d)
Earliest precovery date6 May 1954
Aphelion3.2353 AU
Perihelion1.0624 AU
2.1488 AU
Eccentricity0.5056
3.15 yr (1,151 d)
129.40°
0° 18m 46.44s / day
Inclination23.962°
188.31°
194.53°
Earth MOID0.0716 AU (27.8938 LD)
Physical characteristics
Mean diameter
5.7 km[4]
2.6890 h[5]
0.195±0.032[4]
SMASS = Sl [3]
13.9[3]
14.3[1]

    Orbit and classification

    Cuyo orbits the Sun at a distance of 1.1–3.2 AU once every 3 years and 2 months (1,151 days; semi-major axis of 2.15 AU). Its orbit has an eccentricity of 0.51 and an inclination of 24° with respect to the ecliptic.[3]

    Naming

    This minor planet is named in honor of the Universidad Nacional de Cuyo, which operated the observatory at El Leoncito in collaboration with Columbia and Yale University. Cuyo is also the name of a region in central-west Argentina.[2] The official naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3828).[6]

    Physical characteristics

    SMASS classification Cuyo is a stony Sl-type.[3] In 1989, Cuyo was detected with radar from the Arecibo Observatory at a distance of 0.17 AU. The measured radar cross-section was 2.5 km2.[7] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Cuyo measures 5.7 kilometers in diameter and its surface has an albedo of 0.195.[3]

    References
    1. "1917 Cuyo (1968 AA)". Minor Planet Center. Retrieved 21 October 2019.
    2. Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1917) Cuyo. Springer Berlin Heidelberg. p. 154. doi:10.1007/978-3-540-29925-7_1918. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 1917 Cuyo (1968 AA)" (2019-06-03 last obs.). Jet Propulsion Laboratory. Retrieved 21 October 2019.
    4. 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. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117.
    5. "LCDB Data for (1917) Cuyo". Asteroid Lightcurve Database (LCDB). Retrieved 21 October 2019.
    6. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
    7. Ostro, S. J.; Campbell, D. B.; Chandler, J. F.; Shapiro, I. I.; Hine, A. A.; Velez, R.; et al. (October 1991). "Asteroid radar astrometry". The Astronomical Journal. 102: 1490–1502. Bibcode:1991AJ....102.1490O. doi:10.1086/115975. ISSN 0004-6256.
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