_Sormano.png) Shape model ofSormano from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | P. Sicoli V. Giuliani |
| Discovery site | Sormano Obs. |
| Discovery date | 5 February 1995 |
| Designations | |
| (6882) Sormano | |
Named after | Sormano Observatory (discovering observatory)[2] |
| 1995 CC1 · 1986 XM2 1989 OW · 1993 OQ | |
| Orbital characteristics[3] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 27.85 yr (10,173 days) |
| Aphelion | 2.8043AU |
| Perihelion | 2.2997 AU |
| 2.5520 AU | |
| Eccentricity | 0.0989 |
| 4.08yr (1,489 days) | |
| 327.31° | |
| 0° 14m 30.48s / day | |
| Inclination | 14.390° |
| 284.19° | |
| 16.030° | |
| Physical characteristics | |
| 6.69 km(calculated)[4] 7.665±0.101 km[5] 8.096±0.040 km[6] | |
| 3.6901±0.0006 h[7] 3.998344±0.000001 h[8] | |
| 0.21(assumed)[4] 0.269±0.034[6] 0.3003±0.0545[5] | |
| S(family-based)[4] | |
| 12.5[5] · 12.7[3] · 12.736±0.003(R)[7] · 13.19[4] | |
6882 Sormano (prov. designation:1995 CC1) is an stonyEunomia asteroid from the middle region of theasteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 5 February 1995, by Italian amateur astronomersPiero Sicoli andValter Giuliani atSormano Astronomical Observatory in northern Italy.[1] The asteroid was named for the Italian mountain-village ofSormano and its discovering observatory.[2]
Sormano is a member of theEunomia family, a large group ofS-type asteroids and the most prominent family in theintermediate main-belt. It orbits the Sun at a distance of 2.3–2.8 AU once every 4 years and 1 month (1,489 days). Its orbit has aneccentricity of 0.10 and aninclination of 14° with respect to theecliptic.[3] The asteroid'sobservation arc begins 6 years prior to its discovery, as it had previously been observed as1989 OW atPalomar Observatory in 1989.[1]
Thisminor planet was named in honor of the Italian mountain-village ofSormano and its discovering nearbyobservatory. It is funded, built and operated by the "Gruppo Astrofili Brianza", a group of Italian amateur astronomers who have discovered numerous minor planets.[2] Theofficial naming citation was published by theMinor Planet Center on 3 May 1996 (M.P.C. 27130).[9]
In September 2010, a rotationallightcurve ofSormano was obtained fromphotometric observations made at thePalomar Transient Factory in California. It gave arotation period of3.6901 hours with a high brightness variation of 0.71magnitude, indicative of a non-spheroidal shape (U=2).[7] A similar period of 3.998 hours was derived from remodeled data of the Lowell photometric database (n.a.).[8]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Sormano measures 7.6 to 8.0 kilometers in diameter and its surface has analbedo between 0.269 and 0.300.[5][6] TheCollaborative Asteroid Lightcurve Link assumes analbedo 0.21 – derived from15 Eunomia, the family's largest member and namesake – and calculates a diameter of 6.69 kilometers with anabsolute magnitude of 13.19.[4]
