1960 Guisan

1960 Guisan
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 25 October 1973
Designations
MPC designation (1960) Guisan
Named after
 Henri Guisan (General)[2]
1973 UA · 1961 VC1
1969 UR2
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 61.49 yr (22,461 days)
Aphelion 2.8352 AU
Perihelion 2.2185 AU
2.5268 AU
Eccentricity 0.1220
4.02 yr (1,467 days)
74.212°
0° 14m 43.44s / day
Inclination 8.4737°
22.213°
263.99°
Physical characteristics
Dimensions 24.55±1.2 km (IRAS:5)[4]
24.65±0.28 km[5]
27.004±0.176 km[6]
27.23±0.57 km[7]
28.411±0.105 km[8]
8.46 h[9]
0.0370±0.0050[8]
0.041±0.003[7][6]
0.049±0.011[5]
0.0496±0.005 (IRAS:5)[4]
C [3]
B–V = 0.720[1]
U–B = 0.290[1]
11.93[1][3][7][8][5][9] · 11.93 (IRAS:5)[4]

    1960 Guisan, provisional designation 1973 UA, is a carbonaceous asteroid from the middle region of the asteroid belt, approximately 25 kilometers in diameter.

    It was discovered on 25 October 1973, by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and named after Swiss General Henri Guisan.[2][10]

    Orbit and classification

    Guisan orbits the Sun in the central main-belt at a distance of 2.2–2.8 AU once every 4.02 years (1,467 days). Its orbit has an eccentricity of 0.12 and an inclination of 8° with respect to the ecliptic.[1]

    Physical characteristics

    Guisan has been characterized as a dark C-type asteroid.[3]

    It has a rotation period of 8.46 hours[9] and a geometric albedo of 0.04–0.05, as measured by the IRAS, Akari, WISE and NEOWISE surveys.[4][5][7][8]

    Naming

    This minor planet was named in memory of Henri Guisan (1874–1960), general of the Swiss army during the Second World War. He was notably from the country's smaller Swiss-French part rather than from the German-speaking part.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4157).[11]

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1960 Guisan (1973 UA)" (2016-09-21 last obs.). Jet Propulsion Laboratory. Retrieved 10 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1960) Guisan. Springer Berlin Heidelberg. p. 158. ISBN 978-3-540-00238-3. Retrieved 8 December 2016.
    3. 1 2 3 4 "LCDB Data for (1960) Guisan". Asteroid Lightcurve Database (LCDB). Retrieved 8 December 2016.
    4. 1 2 3 4 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 8 December 2016.
    5. 1 2 3 4 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 8 December 2016.
    6. 1 2 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 8 December 2016.
    7. 1 2 3 4 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 8 December 2016.
    8. 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" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 8 December 2016.
    9. 1 2 3 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus: 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Retrieved 8 December 2016.
    10. ↑ "1960 Guisan (1973 UA)". Minor Planet Center. Retrieved 8 December 2016.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 8 December 2016.
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