27270 Guidotti
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=August 2018}}
{{Infobox planet
| minorplanet = yes
| name = 27270 Guidotti
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = L. Tesi
A. Caronia
| discovery_site = San Marcello Obs.
| discovered = 2 January 2000
| mpc_name = (27270) Guidotti
| alt_names = {{mp|2000 AY|4}}{{·}}{{mp|1995 YH|24}}
{{mp|1998 SS|103}}
| pronounced =
| named_after = Guido Guidotti
{{nowrap|{{small|(Italian amateur astronomer)}}}}
| mp_category = main-belt{{·}}{{small|(inner)}}
background
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 25.95 yr (9,479 days)
| aphelion = 2.6014 AU
| perihelion = 2.2912 AU
| semimajor = 2.4463 AU
| eccentricity = 0.0634
| period = 3.83 yr (1,398 days)
| mean_anomaly = 142.12°
| mean_motion = {{Deg2DMS|0.2576|sup=ms}} / day
| inclination = 2.7846°
| asc_node = 107.85°
| arg_peri = 95.008°
| mean_diameter = 3.74 km {{small|(calculated)}}
6.9 km {{small|(est. at 0.06)}}
| albedo = 0.20 {{small|(assumed)}}
| spectral_type = C{{·}}C {{small|(SDSS-MFB)}}
| abs_magnitude = {{val|14.46|0.28}}{{·}}14.5
}}
27270 Guidotti (provisional designation {{mp|2000 AY|4}}) is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 7 kilometres in diameter. It was discovered on 2 January 2000, by Italian astronomers Luciano Tesi and Alfredo Caronia at the Pistoia Mountains Astronomical Observatory in San Marcello Pistoiese, Italy. The asteroid was named after amateur astronomer Guido Guidotti.
Orbit and classification
Guidotti is a non-family from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 2.3–2.6 AU once every 3 years and 10 months (1,398 days). Its orbit has an eccentricity of 0.06 and an inclination of 3° with respect to the ecliptic.
The body's observation arc begins with a precovery from the Digitized Sky Survey taken at Palomar Observatory in October 1991, more than 8 years prior to its official discovery observation at San Marcello in 2000.
Physical characteristics
Guidotti has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey, as well as by SDSS-MFB (Masi Foglia Bus).
= Rotation period =
In March 2008, a rotational lightcurve of Guidotti was obtained from photometric observations by Slovak astronomers Adrian Galad and Leonard Kornoš. Analysis of the fragmentary lightcurve gave a rotation period of 2.6 hours with a brightness amplitude of 0.3 magnitude ({{small|U=1}}). As of 2017, no secure period has been obtained.
= Diameter and albedo =
Guidotti has not been observed by any of the spaced-based surveys such as the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the Japanese Akari satellite or the Infrared Astronomical Satellite.
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.74 kilometres based on an absolute magnitude of 14.5. Based on a generic magnitude-to-diameter conversion, using a typical albedo for carbonaceous asteroids of 0.06, Guidotti measures 6.9 kilometres in diameter.
Naming
This minor planet was named after Guido Guidotti (born 1946), an Italian amateur astronomer and founder of the Association of Astronomy "A. Pieri" ({{langx|it|Associazione Astrofili Valdinievole "A. Pieri"}}), in Valdinievole, Tuscany, Italy. He is an observer of asteroids and comets, and an organizer of lectures and exhibitions on astronomical subjects. The official naming citation was published by the Minor Planet Center on 26 November 2004 ({{small|M.P.C. 53176}}).
References
{{reflist|30em|refs=
|type = 2017-09-30 last obs.
|title = JPL Small-Body Database Browser: 27270 Guidotti (2000 AY4)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2027270
|publisher = Jet Propulsion Laboratory
|accessdate = 1 November 2017}}
|title = Dictionary of Minor Planet Names – (27270) Guidotti, Addendum to Fifth Edition: 2003–2005
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 191
|date = 2006
|isbn = 978-3-540-34361-5
|doi = 10.1007/978-3-540-34361-5_2245 |chapter = (27270) Guidotti [2.45, 0.06, 2.8] }}
|title = 27270 Guidotti (2000 AY4)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=27270
|accessdate = 1 November 2017}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = 1 November 2017}}
|title = Asteroid Size Estimator
|publisher = CNEOS – NASA/JPL
|url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
|accessdate = 1 November 2017}}
|title = Asteroid 27270 Guidotti – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=27270
|access-date= 29 October 2019}}
|title = LCDB Data for (27270) Guidotti
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=27270%7CGuidotti
|accessdate = 1 November 2017}}
|first1 = Adrian |last1 = Galad
|first2 = Leonard |last2 = Kornos
|date = October 2008
|title = A Collection of Lightcurves from Modra: 2007 December- 2008 June
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..144G
|journal = The Minor Planet Bulletin
|volume = 35
|issue = 4
|pages = 144–146
|issn = 1052-8091
|bibcode = 2008MPBu...35..144G
|access-date= 1 November 2017}}
|display-authors = 6
|first1 = Peter |last1 = Veres
|first2 = Robert |last2 = Jedicke
|first3 = Alan |last3 = Fitzsimmons
|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
|first6 = Bryce |last6 = Bolin
|first7 = Serge |last7 = Chastel
|first8 = Richard J. |last8 = Wainscoat
|first9 = William S. |last9 = Burgett
|first10 = Kenneth C. |last10 = Chambers
|first11 = Heather |last11 = Flewelling
|first12 = Nick |last12 = Kaiser
|first13 = Eugen A. |last13 = Magnier
|first14 = Jeff S. |last14 = Morgan
|first15 = Paul A. |last15 = Price
|first16 = John L. |last16 = Tonry
|first17 = Christopher |last17 = Waters
|date = November 2015
|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V
|journal = Icarus
|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= 1 November 2017}}
}}
External links
- [http://www.aavapieri.org/ Associazione Astrofili Valdinievole "A. Pieri"]
- [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
- [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs025001.html Discovery Circumstances: Numbered Minor Planets (25001)-(30000)] – Minor Planet Center
- {{AstDys|27270}}
- {{JPL small body}}
{{Minor planets navigator | |number=27270 |}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Guidotti}}
Category:Discoveries by Luciano Tesi