Misplaced Pages

6882 Sormano

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.

6882 Sormano
Shape model of Sormano from its lightcurve
Discovery 
Discovered byP. Sicoli
V. Giuliani
Discovery siteSormano Obs.
Discovery date5 February 1995
Designations
MPC designation(6882) Sormano
Named afterSormano Observatory
(discovering observatory)
Alternative designations1995 CC1 · 1986 XM2
1989 OW · 1993 OQ
Minor planet category
Orbital characteristics 
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc27.85 yr (10,173 days)
Aphelion2.8043 AU
Perihelion2.2997 AU
Semi-major axis2.5520 AU
Eccentricity0.0989
Orbital period (sidereal)4.08 yr (1,489 days)
Mean anomaly327.31°
Mean motion0° 14 30.48 / day
Inclination14.390°
Longitude of ascending node284.19°
Argument of perihelion16.030°
Physical characteristics
Mean diameter6.69 km (calculated)
7.665±0.101 km
8.096±0.040 km
Synodic rotation period3.6901±0.0006 h
3.998344±0.000001 h
Geometric albedo0.21 (assumed)
0.269±0.034
0.3003±0.0545
Spectral typeS (family-based)
Absolute magnitude (H)12.5 · 12.7 · 12.736±0.003 (R) · 13.19

6882 Sormano (prov. designation: 1995 CC1) is an stony Eunomia asteroid from the middle region of the asteroid belt, approximately 7 kilometers (4.3 miles) 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. The asteroid was named for the Italian mountain-village of Sormano and its discovering observatory.

Orbit and classification

Sormano 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 (1,489 days). Its orbit has an eccentricity of 0.10 and an inclination of 14° with respect to the ecliptic. The asteroid's observation arc begins 6 years prior to its discovery, as it had previously been observed as 1989 OW at Palomar Observatory in 1989.

Naming

This 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. The official naming citation was published by the Minor Planet Center on 3 May 1996 (M.P.C. 27130).

Physical characteristics

Rotation and shape

In September 2010, a rotational lightcurve of Sormano was obtained from photometric observations made at the Palomar Transient Factory in California. It gave a rotation period of 3.6901 hours with a high brightness variation of 0.71 magnitude, indicative of a non-spheroidal shape (U=2). A similar period of 3.998 hours was derived from remodeled data of the Lowell photometric database (n.a.).

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sormano measures 7.6 to 8.0 kilometers in diameter and its surface has an albedo between 0.269 and 0.300. 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 with an absolute magnitude of 13.19.

References

  1. ^ "6882 Sormano (1995 CC1)". Minor Planet Center. Retrieved 4 November 2016.
  2. ^ Schmadel, Lutz D. (2007). "(6882) Sormano". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 563. doi:10.1007/978-3-540-29925-7_6162. ISBN 978-3-540-00238-3.
  3. ^ "JPL Small-Body Database Browser: 6882 Sormano (1995 CC1)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 21 June 2017.
  4. ^ "LCDB Data for (6882) Sormano". Asteroid Lightcurve Database (LCDB). Retrieved 4 November 2016.
  5. ^ 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. S2CID 118700974.
  6. ^ 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. S2CID 119293330. Retrieved 4 November 2016.
  7. ^ 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. S2CID 8342929. Retrieved 4 November 2016.
  8. ^ 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. S2CID 118427201. Retrieved 4 November 2016.
  9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 November 2016.

External links

Minor planets navigator
Small Solar System bodies
Minor planets
Asteroid
Distant minor planet
Comets
Other
Categories: