2227 Otto Struve

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2227 Otto Struve
Discovery [1]
Discovered by Indiana University
(Indiana Asteroid Program)
Discovery site Goethe Link Obs.
Discovery date13 September 1955
Designations
(2227) Otto Struve
Named after
Otto Struve
(Russian astronomer) [2]
1955 RX ·1935 UP
1955 SA2 ·1962 WL2
1965 SV ·1970 ET2
main-belt  ·(inner)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 81.54 yr (29,781 days)
Aphelion 2.6265 AU
Perihelion 1.8468 AU
2.2366 AU
Eccentricity 0.1743
3.35 yr (1,222 days)
140.74°
0° 17m 40.92s / day
Inclination 4.9496°
178.90°
254.10°
Physical characteristics
Dimensions4.668±0.071 [3]
9±4(generic) [4]
0.388±0.112 [3]
13.4 [1]

    2227 Otto Struve, provisional designation 1955 RX, is an asteroid from the inner regions of the asteroid belt, approximately 4.7 kilometers in diameter. The asteroid was discovered on 13 September 1955, by the Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States. [5] It was named after Russian astronomer Otto Struve. [2]

    Contents

    Orbit and classification

    The asteroid orbits the Sun in the inner main-belt at a distance of 1.8–2.6  AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic. It was first identified as 1935 UP at the Johannesburg Observatory in 1935, extending the body's observation arc by 20 years prior to its official discovery observation. [5]

    Physical characteristics

    As of 2016, the asteroid's composition, rotation period and shape remain unknown. According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 4.7 kilometers in diameter and its surface has an albedo of 0.388. [3] Based on its absolute magnitude of 13.4, it has an estimated diameter between 5 and 13 kilometers, assuming an albedo in the range of 0.05 to 0.25. [4] Since most asteroids in the inner main-belt are of a silicaceous rather than of a carbonaceous composition, with higheralbedos, typically around 0.20, the asteroid's diameter might be on the lower end of NASA's published conversion table, as the higher the reflectivity (albedo), the smaller the body's diameter at a constant intrinsic brightness (absolute magnitude). [4]

    Naming

    The minor planet is named in memory of Russian astronomer Otto Struve (1897–1963), discoverer of the two asteroids 991 McDonalda and 992 Swasey, and last of a remarkable dynasty of astronomers: the Struve family.

    His great-grandfather, Wilhelm Struve (also see 768 Struveana), founded the Pulkovo Observatory near St. Petersburg in 1839; his grandfather (Otto), uncle (Hermann) and father (Ludwig) were also distinguished astronomers. Following a period of great privation and misery after World War I, he was invited by Edwin B. Frost (also see 854 Frostia) to come to the U.S. Yerkes Observatory in 1921. He started working in spectroscopy and remained a spectroscopist to the end of his days. He succeeded Frost as Yerkes director in 1932 and was the major force responsible for the establishment of the Texan McDonald Observatory in 1933. Managing editor of the Astrophysical Journal from 1932 to 1947 and became head of the astronomy department of the University of California in Berkeley in 1950. He received the Gold Medal of the Royal Astronomical Society in 1944, and the Bruce Medal in 1948. The lunar crater Struve was also named in his honor. [2] The official naming citation was published by the Minor Planet Center on 13 July 1984 ( M.P.C. 8911/8912). [6]

    Related Research Articles

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    1033 Simona, provisional designation 1924 SM, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. The asteroid was discovered by George Van Biesbroeck in 1924, who named it after his daughter Simona.

    <span class="mw-page-title-main">1046 Edwin</span>

    1046 Edwin, provisional designation 1924 UA, is a background asteroid from the outer regions of the asteroid belt, approximately 30 kilometers kilometers in diameter. It was discovered on 1 December 1924, by Belgian–American astronomer George Van Biesbroeck at the Yerkes Observatory in Wisconsin, United States, who named it after his son, Edwin Van Biesbroeck. The potentially metallic asteroid has a short rotation period of 5.29 hours.

    1181 Lilith is a metallic asteroid from the middle region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 11 February 1927, by Russian–French astronomer Benjamin Jekhowsky at Algiers Observatory in Algeria, Northern Africa, and named after French composer Lili Boulanger.

    1138 Attica, provisional designation 1929 WF, is an asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 22 November 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It was named after the Attica Province in Greece.

    1213 Algeria, provisional designation 1931 XD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. Discovered by Guy Reiss at Algiers Observatory in 1931, it was named after the North African country of Algeria.

    1918 Aiguillon provisional designation 1968 UA, is a dark asteroid from the outer region of the asteroid belt, approximately 20 kilometers in diameter.

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    3037 Alku, provisional designation 1944 BA, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 17 January 1944, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.

    <span class="mw-page-title-main">2839 Annette</span> Flora family asteroid

    2839 Annette is a bright Flora asteroid from the inner regions of the asteroid belt. It was discovered on 5 October 1929, by American astronomer Clyde Tombaugh at Lowell Observatory during his search for Pluto. The presumed S-type asteroid has a rotation period of 10.5 hours and measures approximately 5 kilometers in diameter. It was named after the discoverer's daughter.

    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.

    3687 Dzus, provisional designation A908 TC, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 31 kilometers in diameter. It was discovered by German astronomer August Kopff at Heidelberg-Königstuhl State Observatory on 7 October 1908.

    1541 Estonia, provisional designation 1939 CK, is an asteroid from the central regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 12 February 1939, by astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory near Turku, Finland. The asteroid was named after the Baltic country of Estonia.

    <span class="mw-page-title-main">1361 Leuschneria</span>

    1361 Leuschneria, provisional designation 1935 QA, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 30 August 1935, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium, and named after American astronomer Armin Otto Leuschner.

    <span class="mw-page-title-main">1854 Skvortsov</span> Asteroid

    1854 Skvortsov (prov. designation: 1968 UE1) is a stony background asteroid and relatively slow rotator from the middle region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 22 October 1968, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. It is named after astronomer Evgenii Skvortsov.

    <span class="mw-page-title-main">1704 Wachmann</span>

    1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann.

    2613 Plzeň, provisional designation 1979 QE, is an asteroid from the outer region of the asteroid belt, approximately 28 kilometers in diameter. It was discovered on 30 August 1979, by Czech astronomer Ladislav Brožek at the South Bohemian Kleť Observatory in the Czech Republic. It was later named for the Czech city of Plzeň.

    <span class="mw-page-title-main">1542 Schalén</span>

    1542 Schalén, provisional designation 1941 QE, is a background asteroid from the outer region of the asteroid belt, approximately 45 kilometers in diameter. It was discovered on 26 August 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The dark D-type asteroid was later named after Swedish astronomer Karl Schalén.

    References

    1. 1 2 3 "JPL Small-Body Database Browser: 2227 Otto Struve (1955 RX)" (2017-05-01 last obs.). Jet Propulsion Laboratory . Retrieved 12 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(2227) Otto Struve". Dictionary of Minor Planet Names – (2227) Otto Struve. Springer Berlin Heidelberg. p. 181. doi:10.1007/978-3-540-29925-7_2228. ISBN   978-3-540-00238-3.
    3. 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 7 December 2016.
    4. 1 2 3 "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 7 December 2016.
    5. 1 2 "2227 Otto Struve (1955 RX)". Minor Planet Center. Retrieved 7 December 2016.
    6. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 December 2016.