7866 Sicoli, provisional designation 1982 TK, is a stony Nysa asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 13 October 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona.[7] The asteroid was named after Italian astronomer Piero Sicoli.[2]
| Discovery [1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 13 October 1982 |
| Designations | |
| (7866) Sicoli | |
Named after | Piero Sicoli (discoverer of minor planets)[2] |
| 1982 TK · 1954 CT 1959 OD | |
| main-belt · Nysa [3] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.01 yr (23,016 days) |
| Aphelion | 2.9392 AU |
| Perihelion | 1.9165 AU |
| 2.4279 AU | |
| Eccentricity | 0.2106 |
| 3.78 yr (1,382 days) | |
| 112.12° | |
| 0° 15m 37.8s / day | |
| Inclination | 3.4801° |
| 77.978° | |
| 253.20° | |
| Physical characteristics | |
| Dimensions | 5.604±0.199 km[4][5] 6.34 km (calculated)[3] |
| 0.21 (assumed)[3] 0.2455±0.0504[5] 0.246±0.050[4] | |
| S [3] | |
| 13.28±0.28[6] · 13.3[1][3] · 13.4[5] | |
Orbit and classification
editSicoli is a member of the stony subgroup of the Nysa family, one of the smaller families in the main-belt, named after its namesake, 44 Nysa. The body orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,382 days). Its orbit has an eccentricity of 0.21 and an inclination of 3° with respect to the ecliptic.[1] The first precovery was taken at Palomar Mountain in 1954, extending the asteroid's observation arc by 28 years prior to its discovery.[7]
Physical characteristics
editDiameter and albedo
editAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sicoli measures 6.3 kilometers in diameter and its surface has an albedo of 0.246,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 5.6 kilometers, based on an absolute magnitude of 13.3.[3]
Lightcurves
editAs of 2016, no rotational lightcurve has been obtained for this asteroid and its rotation period and shape remain unknown.[1][3]
Naming
editThis minor planet was named in honor of Italian astronomer Piero Sicoli (born 1954), a discoverer of minor planets and Observation Coordinator at the Sormano Astronomical Observatory in northern Italy.[2] The official naming citation was published by the Minor Planet Center on 28 July 1999 (M.P.C. 35488).[8]
References
edit- ^ a b c d e "JPL Small-Body Database Browser: 7866 Sicoli (1982 TK)" (2017-02-15 last obs.). Jet Propulsion Laboratory. Archived from the original on 5 March 2017. Retrieved 22 June 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(7866) Sicoli". Dictionary of Minor Planet Names – (7866) Sicoli. Springer Berlin Heidelberg. p. 620. doi:10.1007/978-3-540-29925-7_6718. ISBN 978-3-540-00238-3.
- ^ a b c d e f g "LCDB Data for (7866) Sicoli". Asteroid Lightcurve Database (LCDB). Retrieved 4 November 2016.
- ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 4 November 2016.
- ^ 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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
- ^ 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 4 November 2016.
- ^ a b "7866 Sicoli (1982 TK)". Minor Planet Center. Retrieved 4 November 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 November 2016.
External links
edit- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 7866 Sicoli at AstDyS-2, Asteroids—Dynamic Site
- 7866 Sicoli at the JPL Small-Body Database
