Astronomy:51829 Williemccool
| Discovery [1] | |
|---|---|
| Discovered by | NEAT |
| Discovery site | Palomar Obs. |
| Discovery date | 21 July 2001 |
| Designations | |
| (51829) Williemccool | |
| Named after | William C. McCool [2] (American astronaut) |
| 2001 OD41 · 2000 AQ162 | |
| Minor planet category | main-belt · (inner) Vesta [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 21.28 yr (7,773 days) |
| |{{{apsis}}}|helion}} | 2.4023 AU |
| |{{{apsis}}}|helion}} | 2.1540 AU |
| 2.2782 AU | |
| Eccentricity | 0.0545 |
| Orbital period | 3.44 yr (1,256 days) |
| Mean anomaly | 331.36° |
| Mean motion | 0° 17m 11.76s / day |
| Inclination | 7.5659° |
| Longitude of ascending node | 93.340° |
| 119.31° | |
| Physical characteristics | |
| Dimensions | 1.9 km (est. at 0.40)[4] |
| Geometric albedo | 0.40 (assumed)[4] |
| Absolute magnitude (H) | 15.2[1] |
51829 Williemccool (provisional designation 2001 OD41) is a Vestian asteroid from the inner regions of the asteroid belt, approximately 2 kilometers in diameter. It was discovered on 21 July 2001, by astronomers of the Near-Earth Asteroid Tracking program at Palomar Observatory in California, United States. The asteroid was named in memory of American astronaut and pilot William C. McCool, who died in the Space Shuttle Columbia disaster.[5]
Orbit and classification
Williemccool is a member of the Vesta family (401).[3] Vestian asteroids have a composition akin to cumulate eucrites (HED meteorites) and are thought to have originated deep within 4 Vesta's crust, possibly from the Rheasilvia crater, a large impact crater on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision. Vesta is the main belt's second-largest and second-most-massive body after Ceres.[6][7]
It orbits the Sun in the inner main-belt at a distance of 2.2–2.4 AU once every 3 years and 5 months (1,256 days; semi-major axis of 2.28 AU). Its orbit has an eccentricity of 0.05 and an inclination of 8° with respect to the ecliptic.[1]
The body's observation arc begins with a precovery taken by Spacewatch at Kitt Peak Observatory in December 1995, more than 6 years prior to its official discovery observation at Palomar.[5]
Physical characteristics
Rotation period
As of 2017, no rotational lightcurve of Williemccool has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.[1][8]
Diameter and albedo
Williemccool has not been observed by any of the space-based surveys such as the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, IRAS or the Akari satellite.[1] A generic magnitude-to-diameter conversion gives a diameter of 1.9 kilometers based on an absolute magnitude of 15.2 and an assumed albedo 0.40, typical for members of the Vesta family.[4]
Naming
This minor planet was named in memory of William Cameron McCool (1961–2003), an American astronaut and pilot of STS-107, who died in the Space Shuttle Columbia disaster on 1 February 2003. The approved naming citation was published by the Minor Planet Center on 6 August 2003 (M.P.C. 49283).[9]
The following asteroids were named in memory of the other six Columbia crew members: 51823 Rickhusband, 51824 Mikeanderson, 51825 Davidbrown, 51826 Kalpanachawla, 51827 Laurelclark and 51828 Ilanramon.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 51829 Williemccool (2001 OD41)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2051829.
- ↑ 2.0 2.1 Schmadel, Lutz D. (2006). "(51829) Williemccool [2.28, 0.05, 7.6]". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. pp. 216. doi:10.1007/978-3-540-34361-5_2558. ISBN 978-3-540-34361-5.
- ↑ 3.0 3.1 "Asteroid 51829 Williemccool – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=51829+Williemccool#Asteroid%2051829%20WilliemccoolEAR-A-VARGBDET-5-NESVORNYFAM-V3.0.
- ↑ 4.0 4.1 4.2 "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html.
- ↑ 5.0 5.1 "51829 Williemccool (2001 OD41)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=51829.
- ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.
- ↑ Kelley, Michael S.; Vilas, Faith; Gaffey, Michael J.; Abell, Paul A. (September 2003). "Quantified mineralogical evidence for a common origin of 1929 Kollaa with 4 Vesta and the HED meteorites". Icarus 165 (1): 215–218. doi:10.1016/S0019-1035(03)00149-0. Bibcode: 2003Icar..165..215K. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003Icar..165..215K. Retrieved 29 December 2017.
- ↑ "LCDB Data for (51829) Williemccool". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=51829%7CWilliemccool.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- NASA JPL - Space Shuttle Columbia Tribute page
- 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 (50001)-(55000) – Minor Planet Center
- 51829 Williemccool at AstDyS-2, Asteroids—Dynamic Site
- 51829 Williemccool at the JPL Small-Body Database
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