1194 Aletta

1194 Aletta
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date 13 May 1931
Designations
MPC designation 1194 Aletta
Named after
 Aletta Jackson
(discoverer's wife)[2]
1931 JG · 1946 KC
1962 SB
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 84.27 yr (30,779 days)     
Aphelion 3.1816 AU
Perihelion 2.6440 AU
2.9128 AU
Eccentricity 0.0922
4.97 yr (1,816 days)
19.908°
Inclination 10.871°
291.32°
243.02°
Physical characteristics
Dimensions 55.39±1.4 km (IRAS:8)[4]
42.67±0.77 km[5]
46.371±1.188 km[6]
55.23 km (derived)[3]
20.39±0.01 h[7]
19.7±0.1 h[8]
20.3903±0.2170 h[9]
0.0479±0.003 (IRAS:8)[4]
0.085±0.004[5]
0.0375±0.0065[6]
0.0333 (derived)[3]
C [3]
10.6[1]

    1194 Aletta, provisional designation 1931 JG, is a dark, carbonaceous asteroid from the outer region of the asteroid belt, about 55 kilometers in diameter. It was discovered on 13 May 1931, by English-born South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg, South Africa.[10]

    The C-type asteroid orbits the Sun at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,816 days). Its orbit is tilted by 11 degrees to the plane of the ecliptic and shows an eccentricity of 0.09. Two concurring photometric light-curve analysis from the Leura/Kingsgrove Observatory and the Palomar Transient Factory Survey rendered a rotation period of 20.39 hours, with an alternative measurement from the Via Capote Observatory, that gave a slightly shorter period of 19.7 hours.[7][8][9] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of the Wide-field Infrared Survey Explorer, the body has an albedo between 0.04 and 0.09, while the Collaborative Asteroid Lightcurve Link (CALL) derives a lower value of 0.03.[3][4][5][6]

    The discoverer named the asteroid after his wife, Aletta Jackson.[2]

    References

    1. 1 2 3 "JPL Small-Body Database Browser: 1194 Aletta (1931 JG)" (2015-08-26 last obs.). Jet Propulsion Laboratory. Retrieved December 2015.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1194) Aletta. Springer Berlin Heidelberg. p. 100. ISBN 978-3-540-29925-7. Retrieved October 2015.
    3. 1 2 3 4 5 "LCDB Data for (1194) Aletta". Asteroid Lightcurve Database (LCDB). Retrieved December 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 December 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 December 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015.
    7. 1 2 Oey, Julian (October 2011). "Lightcurve Analysis of Asteroids from Leura and Kingsgrove Observatory for the Second Half of 2009 and 2010". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 38 (4): 221–223. Bibcode:2011MPBu...38..221O. ISSN 1052-8091. Retrieved December 2015.
    8. 1 2 Brinsfield, James W. (June 2008). "The Rotation Periods of 531 Zerlina, 1194 Aleta 1352 Wawel, 2005 Hencke, 2648 Owa, and 3509 Sanshui". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 35 (2): 86–87. Bibcode:2008MPBu...35...86B. ISSN 1052-8091. Retrieved December 2015.
    9. 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 December 2015.
    10. ↑ "1194 Aletta (1931 JG)". Minor Planet Center. Retrieved December 2015.

    External links


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