1258 Sicilia

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1258 Sicilia
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 8 August 1932
MPC designation (1258) Sicilia
Named after
Sicily (Italian island)[2]
1932 PG · 1935 BG
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 85.22 yr (31,128 days)
Aphelion 3.3218 AU
Perihelion 3.0484 AU
3.1851 AU
Eccentricity 0.0429
5.68 yr (2,076 days)
0° 10m 24.24s / day
Inclination 7.7022°
Physical characteristics
Dimensions 36.83±13.91 km[4]
41.94±12.35 km[5]
44.39 km (derived)[3]
44.47±2.4 km[6]
44.86±0.75 km[7]
45.669±0.174 km[8]
52.529±0.192 km[9]
13.500±0.003 h[10]
0.0470 (derived)[3]
C (assumed)[3]
10.50[6][7] · 10.60[4][9] · 10.7[1][3] · 10.77[5] · 10.89±0.32[11]

1258 Sicilia, provisional designation 1932 PG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 8 August 1932, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[12] The asteroid was named after the Italian island of Sicily.[2]

Orbit and classification[edit]

Sicilia is a non-family asteroid of the main belt's background population.[13] It orbits the Sun in the outer asteroid belt at a distance of 3.0–3.3 AU once every 5 years and 8 months (2,076 days; semi-major axis of 3.19 AU). Its orbit has an eccentricity of 0.04 and an inclination of 8° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Heidelberg in 1932.[12]

Physical characteristics[edit]

Sicilia is an assumed carbonaceous C-type asteroid.[3]

Rotation period[edit]

In May 2010, a first rotational lightcurve of Sicilia was obtained from photometric observations by astronomers at the Oakley Southern Sky Observatory (E09) in Australia. Lightcurve analysis gave a rotation period of 13.500 hours with a brightness amplitude of 0.19 magnitude (U=3-).[10]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, and the Infrared Astronomical Satellite IRAS, Sicilia measures between 36.83 and 52.529 kilometers in diameter and its surface has an albedo between 0.0369 and 0.07.[4][6][5][7][8][9]

The Collaborative Asteroid Lightcurve Link largely agrees with IRAS and derives an albedo of 0.0470 and a diameter of 44.39 kilometers based on an absolute magnitude of 10.7.[3]


This minor planet was named after the Italian island of Sicily in the Mediterranean Sea. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 116).[2]


  1. ^ a b c d "JPL Small-Body Database Browser: 1258 Sicilia (1932 PG)" (2017-10-29 last obs.). Jet Propulsion Laboratory. Retrieved 30 November 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1258) Sicilia. Springer Berlin Heidelberg. p. 104. ISBN 978-3-540-00238-3. Retrieved 30 November 2017. 
  3. ^ a b c d e f g "LCDB Data for (1258) Sicilia". Asteroid Lightcurve Database (LCDB). Retrieved 30 November 2017. 
  4. ^ a b c d 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:1509.02522Freely accessible. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 30 November 2017. 
  5. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 30 November 2017. 
  6. ^ a b c 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 12 November 2017. 
  7. ^ a b c d 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 30 November 2017. 
  8. ^ a b c 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" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 30 November 2017. 
  9. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 30 November 2017. 
  10. ^ a b Pligge, Zachary; Monnier, Adam; Pharo, John; Stolze, Kellen; Yim, Arnold; Ditteon, Richard (January 2011). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2010 May". The Minor Planet Bulletin. 38 (1): 5–7. Bibcode:2011MPBu...38....5P. ISSN 1052-8091. Retrieved 30 November 2017. 
  11. ^ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 30 November 2017. 
  12. ^ a b "1258 Sicilia (1932 PG)". Minor Planet Center. Retrieved 30 November 2017. 
  13. ^ "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 30 November 2017. 

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