6882 Sormano

6882 Sormano
	Shape model of Sormano from its lightcurve
Discovery
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)
Alternative designations	1995 CC1 · 1986 XM2; 1989 OW · 1993 OQ
Minor planet category	main-belt · (middle); Eunomia · Maria;
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	27.85 yr (10,173 days)
\|{{{apsis}}}\|helion}}	2.8043 AU
\|{{{apsis}}}\|helion}}	2.2997 AU
Semi-major axis	2.5520 AU
Eccentricity	0.0989
Orbital period	4.08 yr (1,489 days)
Mean anomaly	327.31°
Mean motion	0° 14m 30.48s / day
Inclination	14.390°
Longitude of ascending node	284.19°
\|{{{apsis}}}\|helion}}	16.030°
Physical characteristics
Mean diameter	6.69 km (calculated); 7.665±0.101 km; 8.096±0.040 km
Rotation period	3.6901±0.0006 h; 3.998344±0.000001 h
Geometric albedo	0.21 (assumed); 0.269±0.034; 0.3003±0.0545
Spectral type	S (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.^[1] The asteroid was named for the Italian mountain-village of Sormano and its discovering observatory.^[2]

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.^[3] 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.^[1]

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.^[2] The official naming citation was published by the Minor Planet Center on 3 May 1996 (M.P.C. 27130).^[9]

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 ({{{1}}}).^[7] A similar period of 3.998 hours was derived from remodeled data of the Lowell photometric database (n.a.).^[8]

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.^[5]^[6] 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.^[4]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 "6882 Sormano (1995 CC1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=6882.
↑ ^2.0 ^2.1 ^2.2 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. https://archive.org/details/dictionaryminorp00schm.
↑ ^3.0 ^3.1 ^3.2 ^3.3 "JPL Small-Body Database Browser: 6882 Sormano (1995 CC1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006882.
↑ ^4.0 ^4.1 ^4.2 ^4.3 ^4.4 ^4.5 ^4.6 "LCDB Data for (6882) Sormano". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=6882%7CSormano.
↑ ^5.0 ^5.1 ^5.2 ^5.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
↑ ^6.0 ^6.1 ^6.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 4 November 2016.
↑ ^7.0 ^7.1 ^7.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 4 November 2016.
↑ ^8.0 ^8.1 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics 587: 6. doi:10.1051/0004-6361/201527573. Bibcode: 2016A&A...587A..48D. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D. Retrieved 4 November 2016.
↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.

External links

Lightcurve Database Query (LCDB), at www.minorplanet.info
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
6882 Sormano at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
6882 Sormano at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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Original source: https://en.wikipedia.org/wiki/6882 Sormano. Read more

[MPC-object-1] 1.0 ^1.1 ^1.2 ^1.3 "6882 Sormano (1995 CC1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=6882.

[springer-2] 2.0 ^2.1 ^2.2 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. https://archive.org/details/dictionaryminorp00schm.

[jpldata-3] 3.0 ^3.1 ^3.2 ^3.3 "JPL Small-Body Database Browser: 6882 Sormano (1995 CC1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006882.

[lcdb-4] 4.0 ^4.1 ^4.2 ^4.3 ^4.4 ^4.5 ^4.6 "LCDB Data for (6882) Sormano". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=6882%7CSormano.

[WISE-5] 5.0 ^5.1 ^5.2 ^5.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.

[Masiero-2014-6] 6.0 ^6.1 ^6.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 4 November 2016.

[Waszczak-2015-7] 7.0 ^7.1 ^7.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 4 November 2016.

[Durech-2016-8] 8.0 ^8.1 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics 587: 6. doi:10.1051/0004-6361/201527573. Bibcode: 2016A&A...587A..48D. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D. Retrieved 4 November 2016.

[MPC-Circulars-Archive-9] "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.

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