1191 Alfaterna

1191 Alfaterna
Discovery [1]
Discovered by L. Volta
Discovery site Observatory of Turin
(Pino Torinese)
Discovery date 11 February 1931
Designations
MPC designation 1191 Alfaterna
Named after
 Nuceria Alfaterna[2]
1931 CA · 1965 AA
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 85.16 yr (31105 days)
Aphelion 3.0283 AU (453.03 Gm)
Perihelion 2.7553 AU (412.19 Gm)
2.8918 AU (432.61 Gm)
Eccentricity 0.047190
4.92 yr (1796.2 d)
98.183°
0° 12m 1.512s / day
Inclination 18.494°
134.73°
53.098°
Earth MOID 1.79197 AU (268.075 Gm)
Jupiter MOID 2.03652 AU (304.659 Gm)
Jupiter Tisserand parameter 3.212
Physical characteristics
Dimensions 42.09±3 km (IRAS: 17)[4]
46.11±0.63 km[5]
46.375±0.836 km[6]
42.01 km (derived)[3]
Mean radius
 21.045±1.5 km
3.664 h (0.1527 d)[1][3]
33.12±1.92 (provisional)[7]
0.0574±0.009 (IRAS: 17)[1][4]
0.050±0.002[5]
0.0297±0.0053[6]
0.0479 (derived)[3]
C [3]
10.8[1]

    1191 Alfaterna, provisional designation 1931 CA, is a carbonaceous asteroid from the outer region of the asteroid belt, about 42 kilometers in diameter. It was discovered by Italian astronomer Luigi Volta at Pino Torinese Observatory, Northern Italy, on 11 February 1931.[8]

    The C-type asteroid orbits the Sun at a distance of 2.8–3.0 AU once every 4 years and 11 months (1,796 days). Its orbit is tilted by 18 degrees to the plane of the ecliptic and shows an eccentricity of 0.05. It has a rotation period of 3.66 hours[3] with an alternative, provisional rotation of 33 hours[7] and an albedo between 0.03 and 0.06, according to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of the Wide-field Infrared Survey Explorer.[4][5][6]

    It is named for the ancient Roman town of Nuceria Alfaterna, now known as Nocera Inferiore. The ancient city was founded between Pompeii and Salerno by the Oschi around 1000 B.C. and is entombed beneath the present Nocera Superiore, birthplace of A. Fresa, who proposed the name in 1957.[2]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1191 Alfaterna (1931 CA)" (2015-06-18 last obs.). Jet Propulsion Laboratory. Retrieved 1 May 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1191) Alfaterna. Springer Berlin Heidelberg. p. 100. ISBN 978-3-540-29925-7. Retrieved 22 December 2015.
    3. 1 2 3 4 5 6 "LCDB Data for (1191) Alfaterna". Asteroid Lightcurve Database (LCDB). Retrieved 22 December 2015.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 22 December 2015.
    5. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 22 December 2015.
    6. 1 2 3 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 22 December 2015.
    7. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1191) Alfaterna". Geneva Observatory. Retrieved 22 December 2015.
    8. ↑ "1191 Alfaterna (1931 CA)". Minor Planet Center. Retrieved 22 December 2015.

    External links


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