Discovery [1] | |
---|---|
Discovered by | C. Jackson |
Discovery site | Johannesburg Obs. |
Discovery date | 28 April 1932 |
Designations | |
(1242) Zambesia | |
Named after | Zambezi basin [2] (southern Africa) |
1932 HL ·1947 TE 1948 AC ·1967 EF A908 BF | |
main-belt ·(middle) background [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 109.42 yr (39,966 days) |
Aphelion | 3.2569 AU |
Perihelion | 2.2201 AU |
2.7385 AU | |
Eccentricity | 0.1893 |
4.53 yr (1,655 days) | |
139.42° | |
0° 13m 3s / day | |
Inclination | 10.163° |
350.01° | |
52.968° | |
Physical characteristics | |
Dimensions | 42.16±11.24 km [4] 47.54 km (derived) [5] 47.594±0.347 km [6] 47.70±1.6 km [7] 52.668±0.952 km [8] 53.70±3.05 km [9] 62.23±0.79 km [10] 72.818±22.99 km [11] |
15.72±0.14 h [lower-alpha 1] 17.305 h [lower-alpha 2] >24 h (poor) [12] | |
0.0252±0.0184 [11] 0.04±0.01 [9] 0.043±0.001 [10] 0.045±0.032 [4] 0.0541 (derived) [5] 0.058±0.010 [6] 0.0581±0.0040 [8] 0.0708±0.005 [7] | |
C (S3OS2) [13] | |
10.10 [7] [8] [10] ·10.40 [1] [5] [11] ·10.41 [9] ·10.87 [4] | |
1242 Zambesia ( prov. designation:1932 HL) is a dark background asteroid from the central regions of the asteroid belt, approximately 48 kilometers (30 miles) in diameter. It was discovered on 28 April 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. [14] The asteroid was named for the large Zambezi basin in southern Africa. [2]
Zambesia is a non-family asteroid from the main belt's background population. [3] It orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 6 months (1,655 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.19 and an inclination of 10° with respect to the ecliptic. [1]
The asteroid was first observed as A908 BF at Taunton Observatory ( 803 ) in January 1908. The body's observation arc begins at the United States Naval Observatory ( 786 ) in February 1908, more than 26 years prior to its official discovery observation at Johannesburg. [14]
This minor planet was named after the Zambezi river valley, partially part of the former British Central Africa Protectorate. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 114 ). [2] The large Zambezi basin stretches across modern Angola, Botswana, Mozambique, Namibia, Zambia and Zimbabwe.
In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), , Zambesia is a common, carbonaceous C-type asteroid. [13]
In October 2015, a rotational lightcurve of Zambesia was obtained by a group of Spanish astronomers. Lightcurve analysis gave a rotation period of 15.72 hours with a brightness variation of 0.15 magnitude ( U=2 ). [lower-alpha 1] Previous photometric observations gave a divergent period of 17.305 and 24+ hours ( U=1/2 ). [12] [lower-alpha 2]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Zambesia measures between 42.16 and 72.818 kilometers in diameter and its surface has an albedo between 0.0252 and 0.0708. [4] [6] [7] [8] [9] [10] [11]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0541 and a diameter of 47.54 kilometers based on an absolute magnitude of 10.4. [5]
1743 Schmidt, provisional designation 4109 P-L, is a dark background asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered during the Palomar–Leiden survey on 24 September 1960, by astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in California. The C-type asteroid has a rotation period of 17.5 hours. It was named for the optician Bernhard Schmidt.
Arago, provisional designation 1923 OT, is a dark asteroid from the outer regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 5 September 1923, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after French mathematician François Arago.
Pawlowia, provisional designation 1923 OX, is a background asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 October 1923, by Soviet astronomer Vladimir Albitsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Russian physiologist and Nobelist Ivan Pavlov.
La Paz, provisional designation 1923 PD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 31 October 1923, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory and named after the city La Paz in Bolivia.
1039 Sonneberga, provisional designation 1924 TL, is a dark background asteroid, approximately 34 kilometers in diameter, located in the central region of the asteroid belt. It was discovered on 24 November 1924, by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany. The asteroid was named for the German city of Sonneberg, where the Sonneberg Observatory is located.
1041 Asta, provisional designation 1925 FA, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 57 kilometers in diameter. It was discovered on 22 March 1925, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was likely named after Danish actress Asta Nielsen.
1047 Geisha, provisional designation 1924 TE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 17 November 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the British musical The Geisha.
1081 Reseda is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 31 August 1927, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid has a rotation period of 7.3 hours and measures approximately 37 kilometers in diameter. It was named after the herbaceous plant Reseda.
1096 Reunerta, provisional designation 1928 OB, is an asteroid from the background population of the asteroid belt's central region, approximately 40 kilometers in diameter. It was discovered on 21 July 1928, by astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named after South African engineer Theodore Reunert, supporter of the observatory and friend of the discoverer.
11277 Ballard, provisional designation 1988 TW2, is a Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers (3.9 miles) in diameter. It was discovered on 8 October 1988, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California. The assumed S-type asteroid has a rotation period of at least 10 hours. It was named for American marine scientist Robert Ballard.
1246 Chaka, provisional designation 1932 OA, is a background asteroid from the central regions of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 23 July 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The uncommon A/Sl-type asteroid has a longer than average rotation period of 25.5 hours. It was named for the Zulu King Shaka.
1707 Chantal, provisional designation 1932 RL, is a stony background asteroid from the Florian region in the inner asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 8 September 1932, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The S-type asteroid has a rotation period of at least 10 hours. It was named for Chantal, the niece of Belgian astronomer Georges Roland.
1241 Dysona, provisional designation 1932 EB1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 77 kilometers in diameter. It was discovered on 4 March 1932, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named after English astronomer Frank Watson Dyson.
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.
1383 Limburgia, provisional designation 1934 RV, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It is named for the Dutch province Limburg.
4547 Massachusetts is a dark background asteroid from the central regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 16 May 1990, by Japanese astronomers Kin Endate and Kazuro Watanabe at the JCPM Sapporo Station on the island of Hokkaido, Japan. The asteroid was named for the U.S. state of Massachusetts.
2043 Ortutay, provisional designation 1936 TH, is a dark asteroid from the outer regions of the asteroid belt, approximately 45 kilometers in diameter. The asteroid was discovered by Hungarian astronomer György Kulin at the Konkoly Observatory, Budapest, on 12 November 1936. It was named after Hungarian ethnographer Gyula Ortutay.
1692 Subbotina, provisional designation 1936 QD, is a dark background asteroid from the central region of the asteroid belt, approximately 37 kilometers in diameter. The carbonaceous Cg-type asteroid has a rotation period of 9.2 hours. It was discovered by Grigory Neujmin at the Crimean Simeiz Observatory in 1936, and later named after Soviet mathematician and astronomer Mikhail Subbotin.
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.
(7563) 1988 BC, provisional designation 1988 BC, is a background asteroid from the central region of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 16 January 1988, by Japanese amateur astronomer Takuo Kojima at the YGCO Chiyoda Station in the Kantō region of Japan. The asteroid has a rotation period of 6.5 hours.