1197 Rhodesia

Last updated

1197 Rhodesia
001197-asteroid shape model (1197) Rhodesia.png
Shape model of Rhodesia from its lightcurve
Discovery [1]
Discovered by C. Jackson
Discovery site Johannesburg Obs.
Discovery date9 June 1931
Designations
(1197) Rhodesia
Named after
 Rhodesia
(former state in southern Africa)
1931 LD ·1925 AC
1970 HL
main-belt [1] [2]  ·(outer)
background [3] [4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 93.36 yr (34,098 d)
Aphelion 3.5511 AU
Perihelion 2.2215 AU
2.8863 AU
Eccentricity 0.2303
4.90 yr (1,791 d)
323.09°
0° 12m 3.6s / day
Inclination 12.985°
255.74°
277.16°
Physical characteristics
Dimensions 48.0  km × 48.0  km [3]
47.50±3.4  km [5]
47.741±0.163 km [6] [7]
48.92±0.98 km [8]
16.060±0.006  h [9]
0.070 [6]
0.075 [8]
0.0783 [5]
B–V = 0.740±030 [2] [3]
C (assumed) [10]
10.00 [5] [8]
10.18 [6] [10] [11] [12]
10.2 [1] [2]

    1197 Rhodesia, provisional designation 1931 LD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 48 kilometers (30 miles) in diameter. It was discovered on 9 June 1931, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. [1] The likely C-type asteroid has a rotation period of 16.1 hours. [10] It was named for Rhodesia, a former British colony and unrecognised state, which is now Zimbabwe. [13]

    Contents

    Orbit and classification

    Rhodesia is a non-family asteroid from the main belt's background population. [3] [4] It orbits the Sun in the outer asteroid belt at a distance of 2.2–3.6  AU once every 4 years and 11 months (1,791 days; semi-major axis of 2.89 AU). Its orbit has an eccentricity of 0.23 and an inclination of 13° with respect to the ecliptic. [2] The asteroid was first observed at Heidelberg Observatory in January 1925. The body's observation arc also begins at Heidelberg in August 1942, more than 11 years after its official discovery observation at Johannesburg. [1]

    Naming

    This minor planet was named for the former British colony and unrecognized state of Rhodesia (1965–1979) in southern Africa, what is now Zimbabwe. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 111 ). [13]

    Physical characteristics

    Rhodesia is an assumed C-type asteroid which agrees with its albedo and its location in the main belt. [10] It has a B–V color index of 0.740. [2] [3]

    Rotation period

    In December 2017, a rotational lightcurve of Rhodesia was obtained from photometric observations by Tom Polakis at the Command Module Observatory ( V02 ) in Tempe, Arizona. Lightcurve analysis gave a rotation period of 16.060±0.006 hours with a brightness variation of 0.27 magnitude ( U=3- ). [9] This result refines previous period determinations of 15.89 and 16.062 hours by Richard Binzel (1984) and Laurent Bernasconi (2005), respectively ( U=2/2 ). [12] [14]

    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, Rhodesia measures between 46.43 and 52.276 kilometers in diameter and its surface has an albedo between 0.0548 and 0.0783. [5] [6] [7] [8] [11] [15] [16] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0666 and a diameter of 47.40 kilometers based on an absolute magnitude of 10.18. [10] In August 2015, an occultation by Rhodesia determined a cross-section of 48.0 × 48.0 kilometers (no fit). [3]

    Related Research Articles

    4349 Tibúrcio, provisional designation 1989 LX, is a dark asteroid from the central region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 5 June 1989, by German astronomer Werner Landgraf at ESO's La Silla Observatory in northern Chile.

    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.

    <span class="mw-page-title-main">1032 Pafuri</span> Dark background asteroid from the outer regions of the asteroid belt

    1032 Pafuri, provisional designation 1924 SA, is a dark background asteroid from the outer regions of the asteroid belt, approximately 65 kilometers in diameter. It was discovered on 30 May 1924, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named for the river in the Pafuri Triangle in South Africa, created by the confluence of the Limpopo and Levubu rivers. The body's spectral type and rotation period are still poorly determined.

    1062 Ljuba, provisional designation 1925 TD, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 58 kilometers in diameter. The asteroid was discovered on 11 October 1925, by Soviet–Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. It was named after female paratrooper Ljuba Berlin, who died at an early age. The C-type asteroid has a longer-than average rotation period of 33.8 hours.

    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.

    1252 Celestia, provisional designation 1933 DG, is a stony asteroid located in the central asteroid belt. It was discovered on 19 February 1933, by astronomer Fred Whipple at the Oak Ridge Observatory operated by the Harvard-Smithsonian Center for Astrophysics in Massachusetts, United States. The S-type asteroid has a rotation period of 10.6 hours and measures approximately 20 kilometers in diameter. It was named after the discoverer's mother, Celestia MacFarland Whipple.

    1240 Centenaria, provisional designation 1932 CD, is a background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 5 February 1932, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg, Germany. The assumed C-type asteroid has a rotation period of 11.3 hours. It was named for the 100th anniversary of the discovering observatory.

    <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.

    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">1337 Gerarda</span> Main-belt asteroid

    1337 Gerarda, provisional designation 1934 RA1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 40 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 Gerarda Prins, the wife of an orbit computer at Leiden Observatory.

    <span class="mw-page-title-main">1281 Jeanne</span> Dark asteroid from the background population of the intermediate asteroid belt

    1281 Jeanne is a dark asteroid from the background population of the intermediate asteroid belt. It was discovered on 25 August 1933, by astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, who named it after his daughter, Jeanne. The likely P-type asteroid has a rotation period of 15.2 hours and measures approximately 22 kilometers in diameter.

    3754 Kathleen, provisional designation 1931 FM, is a large background asteroid from the outer regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered at the Lowell Observatory near Flagstaff, Arizona, on 16 March 1931, by American astronomer Clyde Tombaugh, who named it after his granddaughter Kathleen Clifford. The assumed C-type asteroid has a rotation period of 11.18 hours. It is the second-highest numbered main-belt asteroid larger than 50 kilometers.

    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.

    <span class="mw-page-title-main">1582 Martir</span> Carbonaceous background asteroid

    1582 Martir, provisional designation 1950 LY, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 15 June 1950, by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory in Argentina. The asteroid was named after the First Lady of Argentina, Eva Perón.

    <span class="mw-page-title-main">4547 Massachusetts</span> Dark background asteroid from the central regions of the asteroid belt

    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.

    1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.

    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.

    7526 Ohtsuka, provisional designation 1993 AA, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Japanese astronomer Takeshi Urata at Nihondaira Observatory Oohira Station, Japan, on 2 January 1993. The asteroid was named after Japanese astronomer Katsuhito Ohtsuka.

    References

    1. 1 2 3 4 5 "1197 Rhodesia (1931 LD)". Minor Planet Center. Retrieved 31 July 2018.
    2. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1197 Rhodesia (1931 LD)" (2018-05-24 last obs.). Jet Propulsion Laboratory . Retrieved 31 July 2018.
    3. 1 2 3 4 5 6 "Asteroid 1197 Rhodesia". Small Bodies Data Ferret. Retrieved 31 July 2018.
    4. 1 2 "Asteroid (1197) Rhodesia – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 May 2018.
    5. 1 2 3 4 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T . Retrieved 31 July 2018.
    6. 1 2 3 4 Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System: EAR-A-COMPIL-5-NEOWISEDIAM-V1.0. Bibcode:2016PDSS..247.....M . Retrieved 31 July 2018.
    7. 1 2 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. S2CID   119293330.
    8. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi: 10.1093/pasj/63.5.1117 . (online, AcuA catalog p. 153)
    9. 1 2 Polakis, Tom (April 2018). "Lightcurve Analysis for Eleven Main-belt Asteroids". The Minor Planet Bulletin. 45 (2): 199–203. Bibcode:2018MPBu...45..199P. ISSN   1052-8091.
    10. 1 2 3 4 5 "LCDB Data for (1197) Rhodesia". Asteroid Lightcurve Database (LCDB). Retrieved 31 July 2018.
    11. 1 2 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID   35447010. (catalog)
    12. 1 2 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus. 72 (1): 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN   0019-1035.
    13. 1 2 Schmadel, Lutz D. (2007). "(1197) Rhodesia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 100. doi:10.1007/978-3-540-29925-7_1198. ISBN   978-3-540-00238-3.
    14. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (1197) Rhodesia". Geneva Observatory. Retrieved 31 July 2018.
    15. ↑ Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID   9341381.
    16. ↑ Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv: 1209.5794 . Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID   46350317.
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.