1264 Letaba

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1264 Letaba
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date21 April 1933
Designations
(1264) Letaba
Named after
 Letaba River [2]
(South African river)
1933 HG ·1930 WC
1954 YB ·1962 HJ
1964 VB
main-belt  ·(outer) [3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 84.54 yr (30,877 days)
Aphelion 3.3108 AU
Perihelion 2.4225 AU
2.8667 AU
Eccentricity 0.1549
4.85 yr (1,773 days)
112.30°
0° 12m 11.16s / day
Inclination 24.953°
235.05°
31.529°
Physical characteristics
Dimensions66.040±0.405 km [5]
67.76±17.00 km [6]
67.79±17.67 km [7]
70.180±23.32 km [8]
70.34±0.77 km [9]
73.629±0.870 km [10]
74.35 km (derived) [3]
74.74±2.1 km [11]
12 h [12]
16 h [12]
32.16±0.03 h [13]
32.74±0.02 h (best) [14]
33.27±0.01 h [15]
63.74±0.01 h [16]
0.0407±0.0432 [8]
0.0462 (derived) [3]
0.05±0.07 [7]
0.05±0.09 [6]
0.0725±0.004 [11]
0.0746±0.0114 [10]
0.082±0.002 [9]
0.093±0.027 [5]
SMASS = C [1] [3]
9.10 [9] [10] [11]  ·9.60 [3] [7]  ·9.67 [6]  ·9.70 [1] [8]  ·9.87±0.22 [17]

    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. [18] The asteroid was named for the Letaba River in eastern South Africa. [2]

    Contents

    Orbit and classification

    Letaba is a non-family asteroid of the main belt's background population. [4] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.3  AU once every 4 years and 10 months (1,773 days; semi-major axis of 2.87 AU). Its orbit has an eccentricity of 0.15 and an inclination of 25° with respect to the ecliptic. [1]

    The asteroid was first identified as 1930 WC at Simeiz Observatory in November 1930. The body's observation arc begins at Johannesburg, the night before its official discovery observation. [18]

    Physical characteristics

    In the SMASS classification, Letaba is a carbonaceous C-type asteroid. [1] [3]

    Rotation period

    Several rotational lightcurves of Letaba have been obtained from photometric observations since 2002. [12] [13] [15] [16] The best-rated lightcurve was measured by the Spanish amateur astronomer group OBAS in July 2016. It gave a longer-than average rotation period of 32.74 hours with a brightness variation of 0.28 magnitude ( U=3 ). [14] It might be a tumbler due to the lightcurve's inconsistent slope segments (T?). [3] [16] Based on its current diameter estimate, Letaba would be the second-largest tumbler just behind the Hildian asteroid 1512 Oulu (see List of tumblers).

    Diameter and albedo

    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, Letaba measures between 66.040 and 74.74 kilometers in diameter and its surface has an albedo between 0.0407 and 0.093. [5] [6] [7] [8] [9] [10] [11]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0462 and a diameter of 74.35 kilometers based on an absolute magnitude of 9.6. [3]

    Naming

    This minor planet was named after the Letaba River, located in eastern South Africa. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 116 ). [2]

    Related Research Articles

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

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    1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca.

    (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.

    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.

    <span class="mw-page-title-main">1555 Dejan</span> Asteroid from the background population of the central regions of the asteroid belt

    1555 Dejan, provisional designation 1941 SA, is an asteroid from the background population of the central regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 September 1941, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle. The asteroid was named after Dejan Đurković, son of Serbian astronomer Petar Đurković.

    1267 Geertruida, provisional designation 1930 HD, is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by astronomer Hendrik van Gent at Johannesburg Observatory in 1930, the asteroid was later named after Geertruid Pels, sister of Dutch astronomer Gerrit Pels.

    1479 Inkeri, provisional designation 1938 DE, is an asteroid from the central regions of the asteroid belt. It is an exceptionally slow rotator, suspected tumbler and measures approximately 19 kilometers in diameter. It was discovered on 16 February 1938, by Finnish astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, Finland. "Inkeri" is the name of two of the discoverer's younger relatives as well as the local name of the former Finnish province of Ingria.

    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.

    3353 Jarvis, or by its provisional designation, 1981 YC, is a carbonaceous Hungaria asteroid, slow rotator and suspected tumbler from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.

    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.

    15350 Naganuma, provisional designation 1994 VB2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at the Yatsugatake South Base Observatory. The likely S-type asteroid has a rotation period of 2.5 hours. It was named for the town of Naganuma in northern Japan.

    1696 Nurmela, provisional designation 1939 FF, is a Baptistina asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 18 March 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named after Finnish academician Tauno Nurmela. The possibly elongated asteroid has a rotation period of 3.15 hours.

    1297 Quadea, provisional designation 1934 AD, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 7 January 1934, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany. The asteroid was named for the parents-in-law of the discoverer's brother.

    <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.

    2420 Čiurlionis, provisionally designated 1975 TN, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 3 October 1975, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula, and later named after Lithuanian painter and composer Mikalojus Čiurlionis.

    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

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