Astronomy:8549 Alcide
| Discovery [1] | |
|---|---|
| Discovered by | Farra d'Isonzo Obs. (inc. Luciano Bittesini) |
| Discovery site | Farra d'Isonzo Obs. |
| Discovery date | 30 March 1994 |
| Designations | |
| (8549) Alcide | |
| Named after | Alcide Bittesini (father of co-discoverer)[2] |
| 1994 FS | |
| Minor planet category | main-belt · Nysa [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.31 yr (8,514 days) |
| |{{{apsis}}}|helion}} | 2.8912 AU |
| |{{{apsis}}}|helion}} | 1.9828 AU |
| 2.4370 AU | |
| Eccentricity | 0.1864 |
| Orbital period | 3.80 yr (1,390 days) |
| Mean anomaly | 318.71° |
| Mean motion | 0° 15m 32.76s / day |
| Inclination | 1.8790° |
| Longitude of ascending node | 205.61° |
| 64.719° | |
| Physical characteristics | |
| Dimensions | 4.19 km (calculated)[3] 4.341±0.076 km[4][5] |
| Rotation period | 3 h[6] |
| Geometric albedo | 0.196±0.012[4][5] 0.21 (assumed)[3] |
| S [3] | |
| Absolute magnitude (H) | 14.2[1][3][4] · 14.3±0.4 (R)[6] · 14.73±0.25[7] |
8549 Alcide, provisional designation 1994 FS, is a stony Nysa asteroid from the inner regions of the asteroid belt, approximately 4.2 kilometers in diameter. It was discovered on 30 March 1994, by a group of amateur astronomers at the Farra d'Isonzo Observatory, Italy, near the border to Slovenia.[8] It was named for Alcide Bittesini, father of co-discoverer Luciano Bittesini.[2]
Orbit and classification
Alcide is a member of the stony subgroup of the Nysa family, one of the smaller families in the main-belt, named after its namesake, 44 Nysa. The body orbits the Sun in the inner main-belt at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,390 days). Its orbit has an eccentricity of 0.19 and an inclination of 2° with respect to the ecliptic.[1] Precoveries were taken at Palomar and Steward Observatory (Kitt Peak) just weeks and days prior to the asteroid's official discovery observation at Farra d'Isonzo.[8]
Physical characteristics
Lightcurves
A rotational lightcurve of Alcide was obtained from photometric observations made by astronomer David Polishook at the ground-based Wise Observatory, Israel, in November 2007. The lightcurve gave a rotation period of 3 hours with a brightness amplitude of 0.2 magnitude ({{{1}}}).[6]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Alcide measures 4.3 kilometers in diameter and its surface has an albedo of 0.195,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 4.2 kilometers with an absolute magnitude of 14.2.[3]
Naming
This minor planet was named for Italian high-school teacher of natural sciences, Alcide Bittesini (1913–1981). He was the father of amateur astronomer Luciano Bittesini, who co-discovered the asteroid with his amateur colleagues at the Farra d'Isonzo Observatory in Italy.[2]
At the age of 9, his father fostered his interest in astronomy, when they observed a comet with a homespun telescope made of a pair of glasses, a tin can and a microscope eyepiece.[2] The official naming citation was published by the Minor Planet Center on 2 February 1999 (M.P.C. 33791).[9]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 8549 Alcide (1994 FS)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008549.
- ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(8549) Alcide". Dictionary of Minor Planet Names – (8549) Alcide. Springer Berlin Heidelberg. pp. 654–655. doi:10.1007/978-3-540-29925-7_7079. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (8549) Alcide". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=8549%7CAlcide.
- ↑ 4.0 4.1 4.2 4.3 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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 7 May 2016.
- ↑ 5.0 5.1 5.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 4 December 2016.
- ↑ 6.0 6.1 6.2 Polishook, D.; Brosch, N. (February 2009). "Photometry and spin rate distribution of small-sized main belt asteroids". Icarus 199 (2): 319–332. doi:10.1016/j.icarus.2008.10.020. Bibcode: 2009Icar..199..319P. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009Icar..199..319P. Retrieved 7 May 2016.
- ↑ 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 7 May 2016.
- ↑ 8.0 8.1 "8549 Alcide (1994 FS)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=8549.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- 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 (5001)-(10000) – Minor Planet Center
- 8549 Alcide at AstDyS-2, Asteroids—Dynamic Site
- 8549 Alcide at the JPL Small-Body Database
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