Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 25 June 1924 |
Designations | |
(1023) Thomana | |
Named after | St. Thomas Choir of Leipzig (German boys' choir) [2] |
1924 RU ·1936 RG | |
main-belt ·(outer) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 92.86 yr (33,916 days) |
Aphelion | 3.4893 AU |
Perihelion | 2.8442 AU |
3.1667 AU | |
Eccentricity | 0.1019 |
5.64 yr (2,058 days) | |
107.00° | |
0° 10m 29.64s / day | |
Inclination | 10.078° |
194.32° | |
194.19° | |
Physical characteristics | |
Dimensions | 53.28±20.25 km [4] 58.27±1.6 km (IRAS:11) [5] 61.02±1.00 km [6] 61.34±4.17 km [7] |
17.56±0.05 h [8] 17.56±0.01 h [9] 17.561±0.007 h [8] 17.5611±0.0005 h [10] | |
0.05±0.05 [4] 0.059±0.012 [7] 0.060±0.002 [6] 0.0649±0.004(IRAS:11) [5] | |
Tholen = G [1] · G [3] B–V = 0.764 [1] U–B = 0.493 [1] | |
9.76 [1] [3] [5] [6] [7] ·9.99 [4] ·10.26±0.57 [11] | |
1023 Thomana, provisional designation 1924 RU, is a rare-type carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 58 kilometers in diameter. It was discovered on 25 June 1924, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after the St. Thomas Choir of Leipzig. [12]
Thomana orbits the Sun in the outer main-belt at a distance of 2.8–3.5 AU once every 5 years and 8 months (2,058 days). Its orbit has an eccentricity of 0.10 and an inclination of 10° with respect to the ecliptic. [1] The asteroid's observation arc begins at Heidelberg, one night after its official discovery observation. [12]
In the Tholen classification, Thomana is an uncommon carbonaceous G-type asteroid. [1]
Between 2006 and 2009, three rotational lightcurves of Thomana were obtained from photometric observations by astronomers James W. Brinsfield, Pierre Antonini as well as René Roy and Laurent Bernasconi. Lightcurve analysis gave a concurring rotation period of 17.56 hours with a brightness variation between 0.27 and 0.36 magnitude ( U=2/2/3- ). [8] [9]
In 2016, an international study modeled a lightcurve from various data sources with a period of 17.5611 hours and found two spin axis of (86.0°, −65.0°) and (272.0°, −42.0°), respectively, in ecliptic coordinates (λ, β) ( Q=n.a. ). [10]
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, Thomana measures between 53.28 and 61.34 kilometers in diameter and its surface has an albedo between 0.05 and 0.065. [4] [5] [6] [7] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0649 and a diameter of 58.27 kilometers based on an absolute magnitude of 9.76. [3]
This minor planet was named by the discoverer after the St. Thomas Choir of Leipzig ("Thomanerchor"), a boys' choir at St. Thomas Church in Leipzig, Germany, where Johann Sebastian Bach used to work as music director. The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 ( H 98; LDS ). [2]
478 Tergeste is a rare-type stony asteroid from the outer region of the asteroid belt, approximately 78 kilometers in diameter. It was discovered on 21 September 1901, by Italian astronomer Luigi Carnera at Heidelberg Observatory in southern Germany. It was named after the Italian city of Trieste.
1093 Freda, provisional designation 1925 LA, is a carbonaceous asteroid from the outer regions of the asteroid belt's background population, approximately 110 kilometers in diameter. It was discovered on 15 June 1925, by astronomer Benjamin Jekhowsky at the Algiers Observatory in Algeria, North Africa. The asteroid was named after French engineer Fred Prévost.
2531 Cambridge, provisional designation 1980 LD, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 11 June 1980, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Arizona, United States. The asteroid was named for the "centers of learning in England and in Massachusetts".
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. It was later named after the discoverer's wife Aletta Jackson.
1633 Chimay, provisional designation 1929 EC, is a Themistian asteroid from the outer region of the asteroid belt, approximately 37 kilometers in diameter.
1295 Deflotte, provisional designation 1933 WD, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 48 kilometers in diameter. It was discovered on 25 November 1933, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. The asteroid was named after the discoverer's nephew.
1805 Dirikis, provisional designation 1970 GD, is a stony Themistian asteroid from the outer region of the asteroid belt, approximately 26 kilometers in diameter.
1672 Gezelle, provisional designation 1935 BD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 29 January 1935, by Belgian astronomer Eugène Delporte at Royal Observatory of Belgium in Uccle, Belgium. It was later named after Flemish poet and Roman Catholic priest Guido Gezelle.
1308 Halleria, provisional designation 1931 EB, is a carbonaceous Charis asteroid from the outer regions of the asteroid belt, approximately 43 kilometers in diameter. It was discovered on 12 March 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named after Albrecht von Haller a Swiss physician, botanist and poet.
1650 Heckmann, provisional designation 1937 TG, is a rare-type Nysian asteroid from the inner regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 11 October 1937, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and later named after astronomer Otto Heckmann.
1284 Latvia, provisional designation 1933 OP, is a rare-type asteroid from the middle region of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 27 July 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after the Republic of Latvia.
1378 Leonce, provisional designation 1936 DB, is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 21 February 1936, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle, who named it after his father, Leonce Rigaux.
1298 Nocturna, provisional designation 1934 AE, is a dark asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 7 January 1934, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid's name is the Feminine adjective of nocturnus, "nightly".
1356 Nyanza, provisional designation 1935 JH, is a dark asteroid from the background population of the outer asteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 May 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the former Nyanza Province in Kenya, Africa.
1493 Sigrid, provisional designation 1938 QB, is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 26 August 1938, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. It was named after Sigrid Strömgren, wife of astronomer Bengt Strömgren.
1585 Union, provisional designation 1947 RG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 52 kilometers in diameter. It was discovered on 7 September 1947, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg, South Africa. The asteroid was named after the discovering observatory.
1339 Désagneauxa, provisional designation 1934 XB, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 4 December 1934, by French astronomer Louis Boyer at the North African Algiers Observatory in Algeria. A few nights later, the asteroid was independently discovered by astronomers Grigory Neujmin and Eugène Delporte, at the Crimean Simeiz and Belgian Uccle Observatory, respectively. It was later named after discoverer's brother-in-law.
1237 Geneviève is a background asteroid from the central region of the asteroid belt, approximately 38 kilometers in diameter. It was discovered on 2 December 1931, by French astronomer Guy Reiss at the Algerian Algiers Observatory in North Africa. The discoverer named it after his daughter Geneviève Reiss.
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.
1481 Tübingia, provisional designation 1938 DR, is a dark asteroid from the outer region of the asteroid belt, approximately 34 kilometers in diameter. It was discovered on 7 February 1938, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named for the German city of Tübingen.