7166 Kennedy
 Kennedy imaged by LONEOS in October 2004 | |
| Discovery[1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 15 October 1985 |
| Designations | |
Named after | Malcolm Kennedy[2] (Astronomical Society of Glasgow) |
| 1985 TR · 1976 JA10 1991 HC5 · 1992 OZ8 | |
| main-belt · (inner) Nysa-Polana complex[3] · background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.93 yr (22,986 days) |
| Aphelion | 2.7579 AU |
| Perihelion | 2.1036 AU |
| 2.4307 AU | |
| Eccentricity | 0.1346 |
| 3.79 yr (1,384 days) | |
| 105.04° | |
| 0° 15m 36.36s / day | |
| Inclination | 3.7053° |
| 14.082° | |
| 64.060° | |
| Physical characteristics | |
| Dimensions | 4.42 km (calculated)[3] 5.129±0.149 km[5][6] |
| 3.659±0.0011 h[7] | |
| 0.21 (assumed)[3] 0.267±0.048[5][6] | |
| S[3][8] | |
| 13.5[6] · 13.633±0.003 (R)[7] · 13.8[1] · 14.06±0.23[8] · 14.08[3] | |
7166 Kennedy, provisional designation 1985 TR, is a stony asteroid located in the inner region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 15 October 1985, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States.[9] The asteroid was named after Malcolm Kennedy of the Astronomical Society of Glasgow.[2]
Orbit and classification
[edit]Kennedy is a member of the Nysa–Polana complex, a collection of overlapping asteroid families located in the inner main asteroid belt near the Kirkwood gap (3:1 orbital resonance with Jupiter).[3] It orbits the Sun in the inner main-belt at a distance of 2.1–2.8 AU once every 3 years and 9 months (1,384 days). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic.[1] The body's observation arc begins with a precovery taken at Palomar Observatory in June 1954, more than 31 years prior to its official discovery observation at Anderson Mesa.[9]
Physical characteristics
[edit]Kennedy has been characterized as a common stony S-type asteroid by PanSTARRS photometric survey.[8]
Rotation period
[edit]In December 2012, a rotational lightcurve of Kennedy was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.659 hours with a brightness amplitude of 0.52 magnitude (U=2).[7]
Diameter and albedo
[edit]According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kennedy measures 5.129 kilometers in diameter and its surface has an albedo of 0.267,[5][6] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 and calculates a diameter of 4.42 kilometers based on an absolute magnitude of 14.08.[3]
Naming
[edit]This minor planet was named in memory of Malcolm Kennedy (1944–1997), secretary of the Astronomical Society of Glasgow. He was born and raised in New Zealand and became a civil engineer in Scotland.[2] The official naming citation was published by the Minor Planet Center on 8 August 1998 (M.P.C. 32348).[10]
References
[edit]- 1 2 3 4 "JPL Small-Body Database Browser: 7166 Kennedy (1985 TR)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 5 October 2017.
- 1 2 3 Schmadel, Lutz D. (2007). "(7166) Kennedy". Dictionary of Minor Planet Names – (7166) Kennedy. Springer Berlin Heidelberg. p. 580. doi:10.1007/978-3-540-29925-7_6328. ISBN 978-3-540-00238-3.
- 1 2 3 4 5 6 7 "MinorPlanet.info: One Asteroid Information". Asteroid Lightcurve Database (LCDB). Retrieved 5 October 2017. Search using Number = "7166"
- ↑ "Asteroid 7166 Kennedy – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- 1 2 3 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. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 October 2017.
- 1 2 3 4 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. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
- 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 5 October 2017.
- 1 2 3 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 5 October 2017.
- 1 2 "7166 Kennedy (1985 TR)". Minor Planet Center. Retrieved 5 October 2017.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 October 2017.
External links
[edit]- Asteroids related to the Astronomical Society of Glasgow, archived website
- Find 7166 Kennedy in the night sky
- 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 (5001)-(10000) – Minor Planet Center
- 7166 Kennedy at AstDyS-2, Asteroids—Dynamic Site
- 7166 Kennedy at the JPL Small-Body Database
