2905 Plaskett, provisional designation 1982 BZ2, is a stony Gefionian asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 24 January 1982, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona.[6] The asteroid was named after Canadian astronomers John Stanley Plaskett and Harry Hemley Plaskett.[2][3]
| Discovery [1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 24 January 1982 |
| Designations | |
| (2905) Plaskett | |
Named after | John Stanley Plaskett Harry Hemley Plaskett (Canadian astronomers) [2][3] |
| 1982 BZ2 · 1973 FJ2 1973 FP · 1978 GV3 | |
| main-belt · (middle) Gefion [4] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 44.60 yr (16,289 days) |
| Aphelion | 3.0704 AU |
| Perihelion | 2.5395 AU |
| 2.8049 AU | |
| Eccentricity | 0.0946 |
| 4.70 yr (1,716 days) | |
| 122.54° | |
| 0° 12m 35.28s / day | |
| Inclination | 8.9005° |
| 9.8462° | |
| 220.04° | |
| Physical characteristics | |
| Dimensions | 10.224±0.145 km[5] |
| 0.273±0.010[5] | |
| SMASS = S [1] | |
| 12.0[1] | |
Orbit and classification
editPlaskett is a member of the Gefion family (516),[4] a large intermediate belt family, named after 1272 Gefion.[7]: 23 It orbits the Sun in the central main-belt at a distance of 2.5–3.1 AU once every 4 years and 8 months (1,716 days; semi-major axis of 2.80 AU). Its orbit has an eccentricity of 0.09 and an inclination of 9° with respect to the ecliptic.[1]
The body's observation arc begins with its first observation as 1973 FP at the Crimean Astrophysical Observatory in March 1973, almost 9 years prior to its official discovery observation at Anderson Mesa.[6]
Physical characteristics
editIn the SMASS classification, Plaskett is a stony S-type asteroid,[1] which corresponds to the overall spectral type of Gefionian asteroids.[7]: 23
Diameter and albedo
editAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Plaskett measures 10.224 kilometers in diameter and its surface has an albedo of 0.273.[5]
Rotation period
editAs of 2017, no rotational lightcurve of Plaskett has been obtained from photometric observations. The body's rotation period, shape and poles remain unknown.[8]
Naming
editThis minor planet was named in memory of Canadian astronomer John Stanley Plaskett (1865–1941) and his son Harry Hemley Plaskett (1893–1980).[2][3] The official naming citation was published by the Minor Planet Center on 10 September 1984 (M.P.C. 9081).[9]
References
edit- ^ a b c d e f "JPL Small-Body Database Browser: 2905 Plaskett (1982 BZ2)" (2017-10-30 last obs.). Jet Propulsion Laboratory. Archived from the original on 15 September 2020. Retrieved 17 November 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(2905) Plaskett". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 239. doi:10.1007/978-3-540-29925-7_2906. ISBN 978-3-540-00238-3.
- ^ a b c Halliday, I. (February 1985). "Two More Minor Planets Named for Canadian Astronomers". Journal of the Royal Astronomical Society of Canada. 79 (1): 26. Bibcode:1985JRASC..79...26H. Retrieved 17 November 2017.
- ^ a b "Asteroid 2905 Plaskett – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
- ^ a b c 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. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 17 November 2017.
- ^ a b "2905 Plaskett (1982 BZ2)". Minor Planet Center. Retrieved 17 November 2017.
- ^ a b Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
- ^ "LCDB Data for (2905) Plaskett". Asteroid Lightcurve Database (LCDB). Retrieved 17 November 2017.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 November 2017.
External links
edit- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 2905 Plaskett at AstDyS-2, Asteroids—Dynamic Site
- 2905 Plaskett at the JPL Small-Body Database
