1695 Walbeck

1695 Walbeck
Discovery [1]
Discovered by L. Oterma
Discovery site Turku Observatory
Discovery date 15 October 1941
Designations
MPC designation 1695 Walbeck
Named after
 Henrik Walbeck
(geodesist)[2]
1941 UO · 1964 QA
1964 RE
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 74.32 yr (27146 days)
Aphelion 3.5937 AU (537.61 Gm)
Perihelion 1.9698 AU (294.68 Gm)
2.7817 AU (416.14 Gm)
Eccentricity 0.29189
4.64 yr (1694.6 d)
14.090°
0° 12m 44.784s / day
Inclination 16.704°
218.46°
139.46°
Earth MOID 0.995642 AU (148.9459 Gm)
Jupiter MOID 2.01932 AU (302.086 Gm)
Jupiter Tisserand parameter 3.210
Physical characteristics
Dimensions 19.62 km[4]
19.84±0.29 km[5]
18.953±0.258 km[6]
17.88±0.27 km[7]
Mean radius
 9.81 ± 0.4 km
5.1607 h (0.21503 d)[1][8]
5.3 h[9]
0.0504[4]
0.051±0.002[5]
0.0425±0.0058[6]
0.037±0.007[7]
0.0503 (derived)[3]
0.0504 ± 0.005[1]
SMASS = Cg
C [3]
12.5

    1695 Walbeck, provisional designation 1941 UO, is an eccentric, carbonaceous asteroid from the outer region of the asteroid belt, about 19 kilometers in diameter. It was discovered by Finnish female astronomer Liisi Oterma at Turku Observatory on 15 October 1941.[10]

    The Cg-type asteroid orbits the Sun at a distance of 2.0–3.6 AU once every 4 years and 8 months (1,695 days). Its orbit shows a relatively high eccentricity of 0.29 and is significantly tilted by 17 degrees towards the plane of the ecliptic. It has a rotation period of 5.2 hours[8][9] and an albedo in the range of 0.03–0.06, according to the surveys carried out by IRAS, Akari, WISE and NEOWISE.[4][5][6][7]

    The minor planet was named in memory of Finnish scientist Henrik Johan Walbeck (1793–1822), astronomer and geodesist at the old Academia Aboensis who used the method of least squares to derive a good value for the Earth's flattening.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1695 Walbeck (1941 UO)" (2015-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1695) Walbeck. Springer Berlin Heidelberg. p. 135. ISBN 978-3-540-29925-7. Retrieved 10 November 2015.
    3. 1 2 3 "LCDB Data for (1695) Walbeck". Asteroid Lightcurve Database (LCDB). Retrieved 10 November 2015.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 10 November 2015.
    5. 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 10 November 2015.
    6. 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 10 November 2015.
    7. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 10 November 2015.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1695) Walbeck". Geneva Observatory. Retrieved 10 November 2015.
    9. 1 2 Székely, P.; Kiss, L. L.; Szabó, Gy. M.; Sárneczky, K.; Csák, B.; Váradi, M.; Mészáros, Sz. (August 2005). "CCD photometry of 23 minor planets". Planetary and Space Science. 53 (9): 925–936. arXiv:astro-ph/0504462Freely accessible. Bibcode:2005P&SS...53..925S. doi:10.1016/j.pss.2005.04.006. Retrieved 10 November 2015.
    10. ↑ "1695 Walbeck (1941 UO)". Minor Planet Center. Retrieved 10 November 2015.

    External links


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