1688 Wilkens

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 16.82±0.29 km[4]
16.239±0.118 km[5]
12.69 km (calculated)[3]
7.248 h (0.3020 d)[1][6]
7.3017±0.0676 h[7]
0.066±0.003[4]
0.0440±0.0055[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. 1 2 3 "JPL Small-Body Database Browser: 1688 Wilkens (1951 EQ1)" (2015-08-14 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 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 November 2015.
    3. 1 2 3 4 5 "LCDB Data for (1688) Wilkens". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 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 November 2015.
    5. 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 November 2015.
    6. 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 November 2015.
    7. 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 November 2015.
    8. ↑ "1688 Wilkens (1951 EQ1)". Minor Planet Center. Retrieved November 2015.

    External links


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