6882 Sormano
| Discovery [1] | |
|---|---|
| Discovered by |
P. Sicoli V. Giuliani |
| Discovery site | Sormano Obs. |
| Discovery date | 5 February 1995 |
| Designations | |
| MPC designation | 6882 Sormano |
Named after |
Sormano Observatory (discovering observatory)[2] |
|
1995 CC1 · 1986 XM2 1989 OW · 1993 OQ | |
| main-belt · Eunomia [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 26.76 yr (9,773 days) |
| Aphelion | 2.8067 AU |
| Perihelion | 2.2991 AU |
| 2.5529 AU | |
| Eccentricity | 0.0994 |
| 4.08 yr (1,490 days) | |
| 230.91° | |
| 0° 14m 29.76s / day | |
| Inclination | 14.390° |
| 284.26° | |
| 15.738° | |
| Physical characteristics | |
| Dimensions |
6.69 km (calculated)[3] 7.665±0.101 km[4] 8.096±0.040 km[5] |
|
3.6901±0.0006 h[6] 3.998344±0.000001 h[7] | |
|
0.21 (assumed)[3] 0.269±0.034[5] 0.3003±0.0545[4] | |
| S [3] | |
|
12.5[4] 12.7[1] 12.736±0.003 (R)[6] 13.19[3] 13.23±0.66[8] | |
|
| |
6882 Sormano, provisional designation 1995 CC1, is an stony Eunomia asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 5 February 1995, by Italian amateur astronomers Piero Sicoli and Valter Giuliani at Sormano Astronomical Observatory in northern Italy.[9]
The asteroid is a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.3–2.8 AU once every 4 years and 1 month (1,490 days). Its orbit has an eccentricity of 0.10 and an inclination of 14° with respect to the ecliptic.[1] The asteroid's observation arc begins 6 years prior to its discovery, as it had previously been identified as "1989 OW" at Palomar Observatory in 1989.[9]
In September 2010, a rotational light-curve was obtained from photometric observations made at the Palomar Transient Factory in California. It gave a rotation period of 3.6901±0.0006 hours with a high brightness variation of 0.71 magnitude, indicative of a non-spheroidal shape (U=2).[6] A similar period of 3.998 hours was derived from remodeled data of the Lowell photometric database (n.a.).[7]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 7.6 to 8.0 kilometers in diameter and its surface has an albedo between 0.269 and 0.300.[4][5] The Collaborative Asteroid Lightcurve Link assumes an albedo 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 6.69 kilometers, based on an absolute magnitude of 13.19.[3]
The minor planet was named in honor of the Italian mountain-village of Sormano and its discovering nearby observatory. It is funded, built and operated by the "Gruppo Astrofili Brianza", a group of Italian amateur astronomers who have discovered numerous minor planets.[2] Naming citation was published on 3 May 1996 (M.P.C. 27130).[10]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 6882 Sormano (1995 CC1)" (2016-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 November 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (6882) Sormano. Springer Berlin Heidelberg. p. 563. ISBN 978-3-540-00238-3. Retrieved 4 November 2016.
- 1 2 3 4 5 6 "LCDB Data for (6882) Sormano". Asteroid Lightcurve Database (LCDB). Retrieved 4 November 2016.
- 1 2 3 4 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:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 4 November 2016. - 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 4 November 2016.
- 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 4 November 2016.
- 1 2 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 4 November 2016.
- ↑ 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.
- 1 2 "6882 Sormano (1995 CC1)". Minor Planet Center. Retrieved 4 November 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 November 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- 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
- 6882 Sormano at the JPL Small-Body Database
