Discovery [1] | |
---|---|
Discovered by | L. Oterma |
Discovery site | Turku Obs. |
Discovery date | 8 September 1942 |
Designations | |
(2064) Thomsen | |
Named after | Ivan Leslie Thomsen (New Zealand astronomer) [2] |
1942 RQ ·1958 RO 1974 OK ·1977 FE3 1977 KA ·A913 QB | |
Mars-crosser [1] [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 74.50 yr (27,211 days) |
Aphelion | 2.8967 AU |
Perihelion | 1.4600 AU |
2.1783 AU | |
Eccentricity | 0.3298 |
3.22 yr (1,174 days) | |
142.30° | |
0° 18m 23.76s / day | |
Inclination | 5.6946° |
302.16° | |
2.7479° | |
Earth MOID | 0.4446 AU |
Physical characteristics | |
Mean diameter | 8.09±0.12 km [4] 13.59 km (derived) [5] 13.61±1.6 km (IRAS:2) [6] |
4.2267±0.0001 h [7] 4.233 h [8] 4.244023±0.000001 h [9] 4.253±0.005 h [10] | |
0.0549±0.015(IRAS:2) [6] 0.0644 (derived) [5] 0.162±0.006 [4] | |
SMASS = S [1] · S [5] [11] [12] B–V = 0.887 [1] U–B = 0.524 [1] | |
12.6 [1] ·12.93 [5] [8] ·13.10 [4] [6] [12] ·13.44±0.31 [11] | |
2064 Thomsen (prov. designation: 1942 RQ) is a stony asteroid and Mars-crosser on an eccentric orbit, that measures approximately 13 kilometers (8.1 miles) in diameter. The asteroid was discovered by Finnish astronomer Liisi Oterma at Turku Observatory, Finland, on 8 September 1942. [3] It was named after New Zealand astronomer Ivan Leslie Thomsen
The S-type asteroid orbits the Sun in the inner main-belt at a distance of 1.5–2.9 AU once every 3 years and 3 months (1,174 days). Its orbit has an eccentricity of 0.33 and an inclination of 6° with respect to the ecliptic. [1]
This minor planet was named in memory of New Zealand astronomer Ivan Leslie Thomsen (1910–1969), director of the Carter Observatory, Wellington, from 1945 until he was appointed director of the Mount John University Observatory only two months before his death. He was an enthusiastic coordinator of New Zealand's astronomy and his efforts eventually led to the minor-planet observing program with the Carter Observatory 41-cm reflector. It was the 1977 rediscovery at the Carter Observatory that allowed this minor planet to be numbered. The official naming citation was published by the Minor Planet Center on 1 August 1978 ( M.P.C. 4421). [2] [13]
Four rotational lightcurves gave a well-defined rotation period of 4.233 hours with a brightness variation of 0.62–0.69 magnitude ( U=3/3/ .a./3 ) [7] [8] [9] [10] and an albedo of 0.055 and 0.16, as measured by the IRAS and Akari surveys, respectively. [4] [6]
Columbia is a stony asteroid from the middle region of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 22 March 1892, by French astronomer Auguste Charlois at Nice Observatory in southeast France. It is named after Christopher Columbus (1451–1506).
1999 Hirayama is a dark background asteroid from the outer region of the asteroid belt, approximately 34 kilometers in diameter. It was discovered on 27 February 1973, by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory in Germany, and later named after Japanese astronomer Kiyotsugu Hirayama.
1746 Brouwer is a Hilda asteroid from the outermost region of the asteroid belt, approximately 64 kilometers in diameter. It was discovered on 14 September 1963, by IU's Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States. It was named after astronomer Dirk Brouwer.
1994 Shane, provisional designation 1961 TE, is a dark Adeonian asteroid from the central region of the asteroid belt, approximately 25 kilometers in diameter.
Belopolskya, provisional designation 1923 OS, is a dark Cybele asteroid from the outermost region of the asteroid belt, approximately 75 kilometers (47 mi) in diameter. It was named for Russian astrophysicist Aristarkh Belopolsky.
1018 Arnolda, provisional designation 1924 QM, is a stony asteroid from the central regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 3 March 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after physicist Arnold Berliner.
1030 Vitja, provisional designation 1924 RQ, is a dark background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 25 May 1924, by Soviet–Russian astronomer Vladimir Albitsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named in honor of Viktor Zaslavskij (1925–1944), a relative of the discoverer.
1099 Figneria, provisional designation 1928 RQ, is an asteroid from the background population of the outer regions of the asteroid belt, approximately 26 kilometers in diameter. Discovered by Grigory Neujmin at Simeiz Observatory in 1928, the asteroid was later named after Russian revolutionary activist Vera Figner.
1675 Simonida, provisional designation 1938 FB, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. Discovered by Milorad Protić in 1938, it was later named after the medieval Byzantine princess Simonida.
2697 Albina, provisional designation 1969 TC3, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 52 kilometers in diameter. It was discovered on 9 October 1969, by Russian astronomer Bella Burnasheva at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The asteroid was later named after Russian astronomer Albina Serova.
1477 Bonsdorffia, provisional designation 1938 CC, is a background asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 6 February 1938, by astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, Finland. The asteroid was named after Finnish astronomer Ilmari Bonsdorff, who founded the Finnish Geodetic Institute.
3141 Buchar, provisional designation 1984 RH, is a dark Cybele asteroid from the outermost region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 2 September 1984, by Czech astronomer Antonín Mrkos at the Kleť Observatory. The D-type asteroid has a rotation period of 11.4 hours. It was named in memory of Czechoslovakian astronomer Emil Buchar.
1754 Cunningham, provisional designation 1935 FE, is a Hildian asteroid from the outermost region of the asteroid belt, approximately 80 kilometers in diameter.
4063 Euforbo is a large Jupiter trojan from the Greek camp, approximately 100 kilometers in diameter. It was discovered on 1 February 1989, by Italian astronomers at the San Vittore Observatory near Bologna, Italy. The dark D-type asteroid is one of the 25 largest Jupiter trojans and has a rotation period of 8.8 hours. It was named after Euphorbus (Euforbo) from Greek mythology.
3425 Hurukawa, provisional designation 1929 BD, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 29 January 1929, and named after Japanese astronomer Kiichirō Furukawa.
1735 ITA (prov. designation: 1948 RJ1) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 62 kilometers in diameter. It was discovered on 10 September 1948, by Soviet–Russian astronomer Pelageya Shajn at the Simeiz Observatory located on the Crimean peninsula. It was named for the Institute for Theoretical Astronomy (ITA) in what is now Saint Petersburg, Russia.
1737 Severny, provisional designation 1966 TJ, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 21 kilometers in diameter.
2995 Taratuta, provisional designation 1978 QK, is a stony Eunomian asteroid from the middle region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 31 August 1978, by Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The asteroid was later named after Soviet writer Yevgeniya Taratuta.
1558 Järnefelt, provisional designation 1942 BD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 65 kilometers in diameter.
1535 Päijänne, provisional designation 1939 RC, is an asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 9 September 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland. It was later named for Lake Päijänne.