2490 Bussolini
Shape model of Bussolini from its lightcurve
Discovery [1]
Discovered byFelix Aguilar Obs.
Discovery siteEl Leoncito Complex
Discovery date3 January 1976
Designations
(2490) Bussolini
Named after
Juan Bussolini
(Argentine Jesuit physicist)[2]
1976 AG · 1962 WN2
1977 KK · 1978 NT3
1978 QH
main-belt · Eunomia [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc67.13 yr (24,519 days)
Aphelion2.9567 AU
Perihelion2.2617 AU
2.6092 AU
Eccentricity0.1332
4.21 yr (1,539 days)
9.8678°
0° 14m 2.04s / day
Inclination12.964°
212.60°
210.46°
Physical characteristics
Mean diameter
11.725±0.081 km[4]
12.707±0.170 km[5]
12.09 km (calculated)[3]
24 h[6]
0.1918±0.0207[5]
0.21 (assumed)[3]
0.223±0.043[4]
P [5] · S [3]
11.9[1][3][5]

    2490 Bussolini (prov. designation: 1976 AG) is an Eunomia asteroid from the central region of the asteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 3 January 1976, by staff members of the Félix Aguilar Observatory at El Leoncito Complex in Argentina.[7] The asteroid was named after Argentine Jesuit physicist Juan Bussolini.[2]

    Classification and orbit

    Bussolini is a member of the Eunomia family, a large group of typically stony asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.3–3.0 AU once every 4 years and 3 months (1,539 days). Its orbit has an eccentricity of 0.13 and an inclination of 13° with respect to the ecliptic.[1] A first precovery was taken at Palomar Observatory in 1949, extending the body's observation arc by 27 years prior to its official discovery observation at El Leoncito.[7]

    Naming

    This minor planet was named in memory Argentine Jesuit and solar physicist Juan Antonio Bussolini (1905–1966), director of the Observatorio de Fisica Cosmica de San Miguel and a noted supporter of the Felix Aguilar Observatory.[2] The approved naming citation was published by the Minor Planet Centeron 15 May 1984 (M.P.C. 8800).[8]

    Physical characteristics

    Eunomians are typically S-type asteroid.[3] Bussolini has also been characterized as a P-type asteroid by the Wide-field Infrared Survey Explorer (WISE).[5]

    Lightcurve

    In October 2008, a rotational lightcurve of Bussolini was obtained from photometric observations by French amateur astronomer Pierre Antonini. Analysis of the fragmentary lightcurve gave a somewhat longer than average rotation period of 24 hours with a brightness variation of 0.1 magnitude (U=1).[6] As of 2017, no improved period has been obtained.[3]

    Diameter and albedo

    According to the surveys carried out by NASA's WISE observatory with its subsequent NEOWISE mission, Bussolini measures 11.725 and 12.707 kilometers in diameter and its surface has an albedo of 0.223 and 0.1918, respectively.[4][5] 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 12.09 kilometers with an absolute magnitude of 11.9.[3]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 2490 Bussolini (1976 AG)" (2017-01-09 last obs.). Jet Propulsion Laboratory. Retrieved 18 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(2490) Bussolini". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 203. doi:10.1007/978-3-540-29925-7_2491. ISBN 978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 8 "LCDB Data for (2490) Bussolini". Asteroid Lightcurve Database (LCDB). Retrieved 18 June 2017.
    4. 1 2 3 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 18 June 2017.
    5. 1 2 3 4 5 6 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.
    6. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (2490) Bussolini". Geneva Observatory. Retrieved 18 June 2017.
    7. 1 2 "2490 Bussolini (1976 AG)". Minor Planet Center. Retrieved 18 June 2017.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 June 2017.
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