1194 Aletta

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1194 Aletta
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date13 May 1931
Designations
(1194) Aletta
Named after
Aletta Jackson
(discoverer's wife) [2]
1931 JG ·1946 KC
1962 SB
main-belt  ·(outer) [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 85.07 yr (31,072 days)
Aphelion 3.1812 AU
Perihelion 2.6452 AU
2.9132 AU
Eccentricity 0.0920
4.97 yr (1,816 days)
138.73°
0° 11m 53.52s / day
Inclination 10.870°
291.32°
243.18°
Physical characteristics
Dimensions41.358±0.191 km [4]
42.67±0.77 km [5]
46.371±1.188 km [6]
55.22±20.92 km [7]
55.23 km (derived) [3]
55.39±1.4 km [8]
19.7±0.1 h [9]
20.39±0.01 h [10]
20.3903±0.2170 h [11]
0.03±0.03 [7]
0.0333 (derived) [3]
0.0375±0.0065 [6]
0.0479±0.003 [8]
0.085±0.004 [5]
0.087±0.011 [4]
C [3]
10.2 [5] [6] [8]  ·10.5 [12]  ·10.6 [1] [3] [7]  ·10.644±0.001(R) [11]

    1194 Aletta, provisional designation 1931 JG, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 13 May 1931, by South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa. [13] It was later named after the discoverer's wife Aletta Jackson. [2]

    Contents

    Classification and orbit

    Aletta is a dark C-type asteroid and orbits the Sun at a distance of 2.6–3.2  AU once every 4 years and 12 months (1,816 days). Its orbit has an eccentricity of 0.09 and an inclination of 11° with respect to the ecliptic. [1] The body's observation arc begins at Johannesburg, one week after its official discovery observation. No precoveries were taken and no prior identifications were made. [13]

    Physical characteristics

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Aletta measures between 41.358 and 55.39 kilometers in diameter, and its surface has an albedo between 0.03 and 0.87. [4] [5] [6] [7] [8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0333 and a diameter of 55.23 kilometers based on an absolute magnitude of 10.6. [3]

    Rotation period

    In November 2007, American astronomer James W. Brinsfield obtained the first ever lightcurve of Aletta with period of 19.7 hours and a brightness variation of 0.32 magnitude at Via Capote Observatory ( U=2 ). [9] Two more lightcurves were obtained by Australian astronomer Julian Oey at Leura/Kingsgrove Observatory in March 2010, and by the Survey conducted at the Palomar Transient Factory, California, in October 2012. Lightcurve analysis gave a concurring rotation period of 20.39 and 20.3903 hours with an amplitude of 0.28 and 0.27 magnitude, respectively ( U=2+/2 ). [10] [11]

    Naming

    The discoverer named this minor planet for his wife, Aletta Jackson (née Maria Aletta Lessing). [2] Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 111 ). [2]

    Related Research Articles

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    <span class="mw-page-title-main">1554 Yugoslavia</span> Stony Eunomian asteroid from the middle region of the asteroid belt

    1554 Yugoslavia, provisional designation 1940 RE, is a stony Eunomian asteroid from the middle region of the asteroid belt, approximately 16 kilometres (9.9 mi) in diameter. It was discovered by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory, Serbia, on 6 September 1940. It was named for the former country of Yugoslavia.

    <span class="mw-page-title-main">1132 Hollandia</span> Asteroid

    1132 Hollandia, provisional designation 1929 RB1, is a stony asteroid from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 13 September 1929, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It was named for the region Holland in the Netherlands.

    <span class="mw-page-title-main">1165 Imprinetta</span> Carbonaceous Meliboean asteroid

    1165 Imprinetta, provisional designation 1930 HM, is a carbonaceous Meliboean asteroid from the outer regions of the asteroid belt, approximately 49 kilometers (30 mi) in diameter. It was discovered on 24 April 1930 by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. The asteroid was named after Imprinetta Gent, wife of the discoverer.

    (9928) 1981 WE9, provisional designation 1981 WE9, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 16 November 1981, by astronomers at Perth Observatory in Bickley, Australia.

    1567 Alikoski, provisional designation 1941 HN, is a rare-type carbonaceous asteroid from the outer region of the asteroid belt, approximately 67 kilometers in diameter. It was discovered on 22 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was later named after Finnish astronomer Heikki Alikoski.

    <span class="mw-page-title-main">1294 Antwerpia</span> Dark background asteroid

    1294 Antwerpia (prov. designation: 1933 UB1) is a dark background asteroid from the central regions of the asteroid belt. It was discovered on 24 October 1933, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The carbonaceous C-type asteroid has a rotation period of 6.6 hours and measures approximately 35 kilometers (22 miles) in diameter. It was named for the Belgian city of Antwerp.

    2038 Bistro, provisional designation 1973 WF, is a stony asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. The asteroid was discovered on 24 November 1973, by Swiss astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. It was named for the Bistro restaurant.

    1271 Isergina, provisional designation 1931 TN, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 45 kilometers in diameter. It was discovered on 10 October 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Crimean physician and friend of the discoverer, Pyotr Isergin.

    1384 Kniertje, provisional designation 1934 RX, is a dark Adeonian asteroid from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. The asteroid was named after a character in the Dutch play Op Hoop van Zegen by Herman Heijermans.

    2173 Maresjev, provisional designation 1974 QG1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 28 kilometers (17 miles) in diameter. It was discovered on 22 August 1974, by Soviet–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. It was named for Soviet war veteran Alexey Maresyev. The assumed C-type asteroid has a tentative rotation period of 11.6 hours.

    1264 Letaba, provisional designation 1933 HG, is a carbonaceous asteroid and possible tumbler from the background population of the outer asteroid belt, approximately 70 kilometers in diameter. It was discovered on 21 April 1933, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the Letaba River in eastern South Africa.

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    2090 Mizuho, provisional designation 1978 EA, is a stony asteroid from the outer region of the asteroid belt, approximately 18 kilometers in diameter.

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    1258 Sicilia, provisional designation 1932 PG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 8 August 1932, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Italian island of Sicily.

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    <span class="mw-page-title-main">2120 Tyumenia</span> Dark background asteroid

    2120 Tyumenia is a dark background asteroid, approximately 45 kilometers in diameter, located in the outer regions of the asteroid belt. It was discovered on 9 September 1967, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named for the now Russian district of Tyumen Oblast in Western Siberia.

    1296 Andrée, provisional designation 1933 WE, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 25 November 1933, by French astronomer Louis Boyer at the North African Algiers Observatory, Algeria, and named after the discoverer's niece.

    1708 Pólit, provisional designation 1929 XA, is a very dark asteroid from the outer region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 30 November 1929, by Spanish astronomer of Catalan origin Josep Comas i Solà at the Fabra Observatory in Barcelona, and was later named after Catalan astronomer Isidre Pòlit i Boixareu.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1194 Aletta (1931 JG)" (2016-06-14 last obs.). Jet Propulsion Laboratory . Retrieved 1 February 2017.
    2. 1 2 3 4 Schmadel, Lutz D. (2007). "(1194) Aletta". Dictionary of Minor Planet Names – (1194) Aletta. Springer Berlin Heidelberg. p. 100. doi:10.1007/978-3-540-29925-7_1195. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (1194) Aletta". Asteroid Lightcurve Database (LCDB). Retrieved 1 February 2017.
    4. 1 2 3 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 1 February 2017.
    5. 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. (online, AcuA catalog p. 153)
    6. 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.
    7. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117 . Retrieved 1 February 2017.
    8. 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. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T . Retrieved 22 October 2019.
    9. 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 1 February 2017.
    10. 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 1 February 2017.
    11. 1 2 3 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 1 February 2017.
    12. ↑ Faure, Gerard; Garrett, Lawrence (October 2009). "Suggested Revised H Values of Selected Asteroids: Report Number 4". The Minor Planet Bulletin. 36 (4): 140–143. Bibcode:2009MPBu...36..140F. ISSN   1052-8091 . Retrieved 1 February 2017.
    13. 1 2 "1194 Aletta (1931 JG)". Minor Planet Center. Retrieved 1 February 2017.
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