1688 Wilkens
Discovery [1] | |
---|---|
Discovered by | M. Itzigsohn |
Discovery site | La Plata Observatory |
Discovery date | 3 March 1951 |
Designations | |
MPC designation | 1688 Wilkens |
Named after |
Alexander Wilkens (astronomer)[2] |
1951 EQ1 · 1964 JC | |
main-belt · (middle) [3] | |
Orbital characteristics [1] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 0 | |
Observation arc | 64.45 yr (23540 days) |
Aphelion | 3.2508 AU (486.31 Gm) |
Perihelion | 1.9846 AU (296.89 Gm) |
2.6177 AU (391.60 Gm) | |
Eccentricity | 0.24184 |
4.24 yr (1547.0 d) | |
19.317° | |
0° 13m 57.756s / day | |
Inclination | 11.761° |
245.77° | |
42.436° | |
Earth MOID | 0.983897 AU (147.1889 Gm) |
Jupiter MOID | 1.95152 AU (291.943 Gm) |
Jupiter Tisserand parameter | 3.335 |
Physical characteristics | |
Dimensions |
±0.29 km 16.82[4] ±0.118 km 16.239[5] 12.69 km (calculated)[3] |
7.248 h (0.3020 d)[1][6] ±0.0676 h 7.3017[7] | |
±0.003 0.066[4] ±0.0055 0.0440[5] 0.10 (assumed)[3] | |
S [3] | |
12.7 | |
|
1688 Wilkens, provisional designation 1951 EQ1, is a stony asteroid from the middle region of the asteroid belt, about 16 kilometers in diameter. It was discovered by Argentine astronomer Miguel Itzigsohn at La Plata Observatory in the Province of Buenos Aires on 3 March 1951.[8]
The asteroid orbits the Sun at a distance of 2.0–3.3 AU once every 4 years and 3 months (1,547 days). Its orbit shows an eccentricity of 0.24 and is tilted by 12 degrees to the plane of the ecliptic. It has a rotation period of 7.2 and 7.3 hours, based on light-curve observations made in 2011 and 2014, respectively.[6][7] The S-type asteroid's albedo was determined to be 0.066 by Akari, 0.044 by preliminary NEOWISE results, and 0.10 by the Light-curve Database project based on assumptions.[3][4][5]
The minor planet was named after German astronomer Alexander Wilkens (1881–1968), researcher in many branches of astronomy, most notably celestial mechanics. After having worked for many years in Germany, he trained two generations of celestial mechanicians at the discovering La Plata Observatory before returning to his native country.[2]
References
- 1 2 3 "JPL Small-Body Database Browser: 1688 Wilkens (1951 EQ1)" (2015-08-14 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1688) Wilkens. Springer Berlin Heidelberg. p. 134. ISBN 978-3-540-29925-7. Retrieved 11 November 2015.
- 1 2 3 4 5 "LCDB Data for (1688) Wilkens". Asteroid Lightcurve Database (LCDB). Retrieved 11 November 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 11 November 2015.
- 1 2 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. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 11 November 2015.
- 1 2 Franco, Lorenzo (April 2012). "Lightcurve Photometry of 1688 Wilkens". The Minor Planet Bulletin. 39 (2): 50. Bibcode:2012MPBu...39...50F. ISSN 1052-8091. Retrieved 11 November 2015.
- 1 2 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 11 November 2015.
- ↑ "1688 Wilkens (1951 EQ1)". Minor Planet Center. Retrieved 11 November 2015.
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 (1)-(5000) – Minor Planet Center
- 1688 Wilkens at the JPL Small-Body Database
- JPL Small-Body Database Browser on 1688 Wilkens
- Franco, L. (2011) http://digilander.libero.it/A81_Observatory