Astronomy:27270 Guidotti
| Discovery [1] | |
|---|---|
| Discovered by | L. Tesi A. Caronia |
| Discovery site | San Marcello Obs. |
| Discovery date | 2 January 2000 |
| Designations | |
| (27270) Guidotti | |
| Named after | Guido Guidotti [2] (Italian amateur astronomer) |
| 2000 AY4 · 1995 YH24 1998 SS103 | |
| Minor planet category | main-belt · (inner) [3] background [4] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 25.95 yr (9,479 days) |
| |{{{apsis}}}|helion}} | 2.6014 AU |
| |{{{apsis}}}|helion}} | 2.2912 AU |
| 2.4463 AU | |
| Eccentricity | 0.0634 |
| Orbital period | 3.83 yr (1,398 days) |
| Mean anomaly | 142.12° |
| Mean motion | 0° 15m 27.36s / day |
| Inclination | 2.7846° |
| Longitude of ascending node | 107.85° |
| 95.008° | |
| Physical characteristics | |
| Mean diameter | 3.74 km (calculated)[3] 6.9 km (est. at 0.06)[5] |
| Rotation period | 2.6 h[6] |
| Geometric albedo | 0.20 (assumed)[3] |
| C [7] · C (SDSS-MFB)[3] | |
| Absolute magnitude (H) | 14.46±0.28[7] · 14.5[1][3] |
27270 Guidotti (provisional designation 2000 AY4) is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers 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.[8] The asteroid was named after amateur astronomer Guido Guidotti.[2]
Orbit and classification
Guidotti is a non-family from the main belt's background population.[4] 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.[1]
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.[8]
Physical characteristics
Guidotti has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey,[7] as well as by SDSS-MFB (Masi Foglia Bus).[3]
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 ({{{1}}}).[6] As of 2017, no secure period has been obtained.[3]
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 kilometers based on an absolute magnitude of 14.5.[3] Based on a generic magnitude-to diameter conversion, using a typical albedo for carbonaceous asteroids of 0.06, Guidotti measures 6.9 kilometers in diameter.[5]
Naming
This minor planet was named after Guido Guidotti (born 1946), an Italian amateur astronomer and founder of the Association of Astronomy "A. Pieri" (Italian: Associazione Astrofili Valdinievole "A. Pieri"), in Valdinievole, Tuscany, Italy. He is an observer of asteroids and comets, and organizer of lectures and exhibitions on astronomical subjects.[2] The official naming citation was published by the Minor Planet Center on 26 November 2004 (M.P.C. 53176).[9]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 27270 Guidotti (2000 AY4)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2027270. Retrieved 1 November 2017.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2006). "(27270) Guidotti [2.45, 0.06, 2.8]". Dictionary of Minor Planet Names – (27270) Guidotti, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 191. doi:10.1007/978-3-540-34361-5_2245. ISBN 978-3-540-34361-5.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (27270) Guidotti". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=27270%7CGuidotti. Retrieved 1 November 2017.
- ↑ 4.0 4.1 "Asteroid 27270 Guidotti – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=27270.
- ↑ 5.0 5.1 "Asteroid Size Estimator". CNEOS – NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 1 November 2017.
- ↑ 6.0 6.1 Galad, Adrian; Kornos, Leonard (October 2008). "A Collection of Lightcurves from Modra: 2007 December- 2008 June". The Minor Planet Bulletin 35 (4): 144–146. ISSN 1052-8091. Bibcode: 2008MPBu...35..144G. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..144G. Retrieved 1 November 2017.
- ↑ 7.0 7.1 7.2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 1 November 2017.
- ↑ 8.0 8.1 "27270 Guidotti (2000 AY4)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=27270. Retrieved 1 November 2017.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 1 November 2017.
External links
- Associazione Astrofili Valdinievole "A. Pieri"
- 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 (25001)-(30000) – Minor Planet Center
- 27270 Guidotti at AstDyS-2, Asteroids—Dynamic Site
- 27270 Guidotti at the JPL Small-Body Database
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