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1197 Rhodesia

March 05, 2023

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]

1197 Rhodesia
Shape model of Rhodesia from its lightcurve
Discovery[1]
Discovered byC. Jackson
Discovery siteJohannesburg 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 arc93.36 yr (34,098 d)
Aphelion3.5511 AU
Perihelion2.2215 AU
2.8863 AU
Eccentricity0.2303
4.90 yr (1,791 d)
323.09°
0° 12m 3.6s / day
Inclination12.985°
255.74°
277.16°
Physical characteristics
Dimensions48.0 km × 48.0 km[3]
Mean diameter
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]

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]

References

  1. ^ a b c d e "1197 Rhodesia (1931 LD)". Minor Planet Center. Retrieved 31 July 2018.
  2. ^ a b c d e f "JPL Small-Body Database Browser: 1197 Rhodesia (1931 LD)" (2018-05-24 last obs.). Jet Propulsion Laboratory. Retrieved 31 July 2018.
  3. ^ a b c d e f "Asteroid 1197 Rhodesia". Small Bodies Data Ferret. Retrieved 31 July 2018.
  4. ^ a b "Asteroid (1197) Rhodesia – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 May 2018.
  5. ^ a b c d 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. ^ a b c d 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. ^ a b 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.
  8. ^ a b c d 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. ^ a b 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. ^ a b c d e "LCDB Data for (1197) Rhodesia". Asteroid Lightcurve Database (LCDB). Retrieved 31 July 2018.
  11. ^ a b 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. (catalog)
  12. ^ a b 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. ^ a b Schmadel, Lutz D. (2007). "(1197) Rhodesia". Dictionary of Minor Planet Names – (1197) Rhodesia. 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.
  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.

External links

  • Asteroid Lightcurve Database (LCDB), query form (info 16 December 2017 at the Wayback Machine)
  • Dictionary of Minor Planet Names, Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • 1197 Rhodesia at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 1197 Rhodesia at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

March 05, 2023
1197, rhodesia, provisional, designation, 1931, dark, background, asteroid, from, outer, regions, asteroid, belt, approximately, kilometers, miles, diameter, discovered, june, 1931, south, african, astronomer, cyril, jackson, union, observatory, johannesburg, . 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 1197 RhodesiaShape model of Rhodesia from its lightcurveDiscovery 1 Discovered byC JacksonDiscovery siteJohannesburg Obs Discovery date9 June 1931DesignationsMPC designation 1197 RhodesiaNamed afterRhodesia former state in southern Africa Alternative designations1931 LD 1925 AC1970 HLMinor planet categorymain belt 1 2 outer background 3 4 Orbital characteristics 2 Epoch 23 March 2018 JD 2458200 5 Uncertainty parameter 0Observation arc93 36 yr 34 098 d Aphelion3 5511 AUPerihelion2 2215 AUSemi major axis2 8863 AUEccentricity0 2303Orbital period sidereal 4 90 yr 1 791 d Mean anomaly323 09 Mean motion0 12m 3 6s dayInclination12 985 Longitude of ascending node255 74 Argument of perihelion277 16 Physical characteristicsDimensions48 0 km 48 0 km 3 Mean diameter47 50 3 4 km 5 47 741 0 163 km 6 7 48 92 0 98 km 8 Synodic rotation period16 060 0 006 h 9 Geometric albedo0 070 6 0 075 8 0 0783 5 Spectral typeB V 0 740 030 2 3 C assumed 10 Absolute magnitude H 10 00 5 8 10 18 6 10 11 12 10 2 1 2 Contents 1 Orbit and classification 2 Naming 3 Physical characteristics 3 1 Rotation period 3 2 Diameter and albedo 4 References 5 External linksOrbit and classification EditRhodesia 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 EditThis 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 EditRhodesia 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 Edit 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 Edit 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 References Edit a b c d e 1197 Rhodesia 1931 LD Minor Planet Center Retrieved 31 July 2018 a b c d e f JPL Small Body Database Browser 1197 Rhodesia 1931 LD 2018 05 24 last obs Jet Propulsion Laboratory Retrieved 31 July 2018 a b c d e f Asteroid 1197 Rhodesia Small Bodies Data Ferret Retrieved 31 July 2018 a b Asteroid 1197 Rhodesia Proper elements AstDyS 2 Asteroids Dynamic Site Retrieved 25 May 2018 a b c d 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 a b c d 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 a b 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 a b c d Usui Fumihiko Kuroda Daisuke Muller 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 a b 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 a b c d e LCDB Data for 1197 Rhodesia Asteroid Lightcurve Database LCDB Retrieved 31 July 2018 a b 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 catalog a b 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 a b Schmadel Lutz D 2007 1197 Rhodesia Dictionary of Minor Planet Names 1197 Rhodesia Springer Berlin Heidelberg p 100 doi 10 1007 978 3 540 29925 7 1198 ISBN 978 3 540 00238 3 Behrend Raoul Asteroids and comets rotation curves 1197 Rhodesia Geneva Observatory Retrieved 31 July 2018 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 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 External links EditAsteroid Lightcurve Database LCDB query form info Archived 16 December 2017 at the Wayback Machine Dictionary of Minor Planet Names Google books Asteroids and comets rotation curves CdR Observatoire de Geneve Raoul Behrend Discovery Circumstances Numbered Minor Planets 1 5000 Minor Planet Center 1197 Rhodesia at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 1197 Rhodesia at the JPL Small Body Database Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 1197 Rhodesia amp oldid 1123254241, wikipedia, wiki, book, books, library,

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