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 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 84.89 yr (31007 days)
Aphelion 3.1810 AU (475.87 Gm)
Perihelion 2.6446 AU (395.63 Gm)
2.9128 AU (435.75 Gm)
Eccentricity 0.092080
4.97 yr (1815.8 d)
99.160°
0° 11m 53.736s / day
Inclination 10.871°
291.32°
243.11°
Earth MOID 1.67154 AU (250.059 Gm)
Jupiter MOID 1.93592 AU (289.610 Gm)
Jupiter Tisserand parameter 3.250
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]
Mean radius
 27.695±0.7 km
20.39±0.01 h[7]
19.7±0.1 h[8]
20.3903±0.2170 h[9]
20.39 h (0.850 d)[1]
0.0479±0.003 (IRAS:8)[1][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 4 5 "JPL Small-Body Database Browser: 1194 Aletta (1931 JG)" (2015-08-26 last obs.). Jet Propulsion Laboratory. Retrieved 1 May 2016.
    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 16 October 2015.
    3. 1 2 3 4 5 "LCDB Data for (1194) Aletta". Asteroid Lightcurve Database (LCDB). Retrieved 23 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 23 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 23 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 23 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". The Minor Planet Bulletin. 38 (4): 221–223. Bibcode:2011MPBu...38..221O. ISSN 1052-8091. Retrieved 23 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". The Minor Planet Bulletin. 35 (2): 86–87. Bibcode:2008MPBu...35...86B. ISSN 1052-8091. Retrieved 23 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 23 December 2015.
    10. ↑ "1194 Aletta (1931 JG)". Minor Planet Center. Retrieved 23 December 2015.

    External links


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