4183 Cuno

4183 Cuno

Radar images of 4183 Cuno
Discovery [1]
Discovered by C. Hoffmeister
Discovery site Boyden Observatory
Discovery date 5 June 1959
Designations
MPC designation 4183 Cuno
Named after
 Cuno Hoffmeister
(astronomer)[2]
1959 LM · 1986 VT7
1987 MB
Apollo · NEO · PHA
Mars-crosser
Venus-crosser
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 20596 days (56.39 yr)
Aphelion 3.2401 AU (484.71 Gm)
Perihelion 0.72474 AU (108.420 Gm)
1.9824 AU (296.56 Gm)
Eccentricity 0.63441
2.79 yr (1019.5 d)
126.46°
0° 21m 11.232s / day
Inclination 6.7065°
294.93°
236.29°
Earth MOID 0.0287438 AU (4.30001 Gm)
Jupiter MOID 1.79954 AU (269.207 Gm)
Jupiter Tisserand parameter 3.572
Physical characteristics
Dimensions 5.38 km[3]
5.49 km[4]
5.618±0.457 km[5]
3.92 km (calculated)[6]
3.5595 h[lower-alpha 1]
3.5590±0.001 h[lower-alpha 2]
3.558±0.002 h[7]
0.11[3]
0.10[4]
0.10±0.10[8]
0.097±0.025[5]
0.20 (assumed)[6]

SMASS = Sq [1]

S [6]
14.4,[1][4][5][6]

    4183 Cuno, provisional designation 1959 LM, is a very eccentric, stony asteroid, classified as near-Earth object and potentially hazardous asteroid. It belongs to the group of Apollo asteroids and measures about 5 kilometers in diameter. It was discovered by German astronomer Cuno Hoffmeister at Boyden Observatory in Bloemfontein, South Africa, on 5 June 1959.[9]

    The asteroid orbits the Sun at a distance of 0.7–3.2 AU once every 2 years and 9 months (1,019 days). Its orbit shows an exceptionally high eccentricity of 0.63 and an inclination of 7 degrees from the plane of the ecliptic. It is also a Mars- and Venus-crosser. The asteroid has an Earth minimum orbital intersection distance of 0.0287 AU (4,290,000 km) and approaches the Earth to within 40 million kilometers six times in the 21st century. On 20 May 2012, it made its closest Earth approach at a distance of 0.122 AU (18,000,000 km).[10] It will not make a closer approach until 2093 when it will pass Earth at 0.084 AU (13,000,000 km).[10]

    Several photometric light-curve analysis gave a rotation period of 3.56 hours with a high brightness amplitude between 0.47 and 0.83 in magnitude, indicating that the body has a non-spheroidal shape.[lower-alpha 1][lower-alpha 2][7] In December 2000, Cuno was analysed by radar to determine its shape. The resultant images are lacking in detail, but indicate a rough sphere with some kind of concave depression 1–2 km in diameter.

    The stony S-type asteroid, with its reflective surface composed of a mixture different silicates, nickel and iron, is classified as a Sq-subtype on the SMASS taxonomic scheme.[1] According to the surveys carried out by NASA's Spitzer Space Telescope and the NEOWISE mission of the Wide-field Infrared Survey Explorer, the asteroid has an albedo of 0.10 to 0.11, with a diameter between 5.4 and 5.6 kilometers,[3][4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for the stony asteroid of 0.20 and calculates a diameter of 3.9 kilometer, as the higher the body's albedo (reflectivity), the lower its diameter, for a given absolute magnitude (brightness).[6]

    The minor planet was named after the its discoverer, Cuno Hoffmeister, following the established practice to name near-Earth asteroids with a four-letter masculine name. Cuno Hoffmeister is also honored by the minor planet 1726 Hoffmeister.[2]

    References

    1. 1 2 Pravec (1998) web: rotation period 3.5595 hours with a brightness amplitude of 0.7 in magnitude. Call assigns a quality code of 3, which denotes a secure result within the precision given and no ambiguity. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (4183) Cuno
    2. 1 2 Pravec (2000) web: rotation period of 3.5590±0.001 hours with a brightness amplitude of 0.83 mag. (LCDB quality code = 3). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (4183) Cuno
    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 4183 Cuno (1959 LM)" (2015-10-25 last obs.). Jet Propulsion Laboratory. Retrieved 14 April 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (4183) Cuno. Springer Berlin Heidelberg. p. 358. ISBN 978-3-540-00238-3. Retrieved February 2016.
    3. 1 2 3 Harris, A. W.; Mommert, M.; Hora, J. L.; Mueller, M.; Trilling, D. E.; Bhattacharya, B.; et al. (March 2011). "ExploreNEOs. II. The Accuracy of the Warm Spitzer Near-Earth Object Survey". The Astronomical Journal 141 (3): 10. Bibcode:2011AJ....141...75H. doi:10.1088/0004-6256/141/3/75. Retrieved February 2016.
    4. 1 2 3 4 Trilling, D. E.; Mueller, M.; Hora, J. L.; Harris, A. W.; Bhattacharya, B.; Bottke, W. F.; et al. (September 2010). "ExploreNEOs. I. Description and First Results from the Warm Spitzer Near-Earth Object Survey". The Astronomical Journal 140 (3): 770–784. Bibcode:2010AJ....140..770T. doi:10.1088/0004-6256/140/3/770. Retrieved February 2016.
    5. 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. Retrieved February 2016.
    6. 1 2 3 4 5 "LCDB Data for (4183) Cuno". Asteroid Lightcurve Database (LCDB). Retrieved February 2016.
    7. 1 2 Warner, Brian D. (April 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 October-December". The Minor Planet Bulletin 42 (2): 115–127. Bibcode:2015MPBu...42..115W. ISSN 1052-8091. Retrieved February 2016.
    8. ↑ Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal 142 (3): 12. Bibcode:2011AJ....142...85T. doi:10.1088/0004-6256/142/3/85. Retrieved February 2016.
    9. ↑ "4183 Cuno (1959 LM)". Minor Planet Center. Retrieved February 2016.
    10. 1 2 "JPL Close-Approach Data: 4183 Cuno (1959 LM))". Retrieved 2012-06-19.

    External links

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