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1712 Angola

April 07, 2024

1712 Angola, provisional designation 1935 KC, is a dark asteroid from the outer regions of the asteroid belt, approximately 66 kilometers in diameter. It was discovered on 28 May 1935, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa.[11] It is named after the Republic of Angola.[2]

1712 Angola
Discovery[1]
Discovered byC. Jackson
Discovery siteJohannesburg Obs.
Discovery date28 May 1935
Designations
(1712) Angola
Named after
Angola (country)[2]
1935 KC · 1929 GC
1935 ML · 1946 JB
1953 SD · 1963 MD
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc87.94 yr (32,121 days)
Aphelion3.6492 AU
Perihelion2.6832 AU
3.1662 AU
Eccentricity0.1525
5.63 yr (2,058 days)
190.35°
0° 10m 29.64s / day
Inclination19.393°
237.61°
18.217°
Physical characteristics
Dimensions59.31 km (derived)[3]
59.48±2.3 km[4]
64.904±1.218 km[5]
66.892±0.298[6]
70.07±1.03 km[7]
74.47±0.68 km[8]
11.527 h[3]
11.5274±0.0007 h[9]
11.53 h[9]
0.029±0.003[8][6]
0.043±0.002[7]
0.0458 (derived)[3]
0.0504±0.0126[5]
0.0600±0.005[4]
P[5] · C[3]
9.8[4][5][7] · 10.1[1][3][8] · 10.15±0.24[10]

Orbit edit

Angola orbits the Sun in the outer main-belt at a distance of 2.7–3.6 AU once every 5 years and 8 months (2,058 days). Its orbit has an eccentricity of 0.15 and an inclination of 19° with respect to the ecliptic.[1] Angola was first identified as 1929 GC at Johannesburg in 1929, extending the body's observation arc by 6 years prior to its official discovery observation.[11]

Lightcurve edit

In July 2003, French amateur astronomer René Roy obtained a rotational lightcurve of Angola. It gave a well-defined rotation period of 11.5274 hours with a brightness variation of 0.38 magnitude (U=3).[9] Photometric observations by ESO's CCD-specialist Cyril Cavadore gave an identical period of 11.53 hours with an insufficient amplitude of 0.02 magnitude (U=1).[9]

Spectra, diameter and albedo edit

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Angola measures between 59.48 and 70.07 kilometers in diameter and its surface has an albedo between 0.029 and 0.060.[4][6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0458 and a diameter of 59.31 kilometers based on an absolute magnitude of 10.1.[3] The carbonaceous C-type asteroid is also classified a dark P type by WISE.[5]

Naming edit

This minor planet is named for Angola, the state on the southwestern coast of Africa.[2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5183).[12]

References edit

  1. ^ a b c d "JPL Small-Body Database Browser: 1712 Angola (1935 KC)" (2017-03-21 last obs.). Jet Propulsion Laboratory. Retrieved 1 July 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1712) Angola". Dictionary of Minor Planet Names – (1712) Angola. Springer Berlin Heidelberg. p. 136. doi:10.1007/978-3-540-29925-7_1713. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1712) Angola". Asteroid Lightcurve Database (LCDB). Retrieved 22 December 2016.
  4. ^ 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. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
  5. ^ a b c d e 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.
  6. ^ a b c 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 22 December 2016.
  7. ^ 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)
  8. ^ a b c d 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. Retrieved 22 December 2016.
  9. ^ a b c d Behrend, Raoul. "Asteroids and comets rotation curves – (1712) Angola". Geneva Observatory. Retrieved 22 December 2016.
  10. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 22 December 2016.
  11. ^ a b "1712 Angola (1935 KC)". Minor Planet Center. Retrieved 22 December 2016.
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 22 December 2016.

External links edit

  • 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
  • 1712 Angola at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 1712 Angola at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

April 07, 2024
1712, angola, provisional, designation, 1935, dark, asteroid, from, outer, regions, asteroid, belt, approximately, kilometers, diameter, discovered, 1935, english, born, south, african, astronomer, cyril, jackson, johannesburg, observatory, south, africa, name. 1712 Angola provisional designation 1935 KC is a dark asteroid from the outer regions of the asteroid belt approximately 66 kilometers in diameter It was discovered on 28 May 1935 by English born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa 11 It is named after the Republic of Angola 2 1712 AngolaDiscovery 1 Discovered byC JacksonDiscovery siteJohannesburg Obs Discovery date28 May 1935DesignationsMPC designation 1712 AngolaNamed afterAngola country 2 Alternative designations1935 KC 1929 GC1935 ML 1946 JB1953 SD 1963 MDMinor planet categorymain belt outer 3 Orbital characteristics 1 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc87 94 yr 32 121 days Aphelion3 6492 AUPerihelion2 6832 AUSemi major axis3 1662 AUEccentricity0 1525Orbital period sidereal 5 63 yr 2 058 days Mean anomaly190 35 Mean motion0 10m 29 64s dayInclination19 393 Longitude of ascending node237 61 Argument of perihelion18 217 Physical characteristicsDimensions59 31 km derived 3 59 48 2 3 km 4 64 904 1 218 km 5 66 892 0 298 6 70 07 1 03 km 7 74 47 0 68 km 8 Synodic rotation period11 527 h 3 11 5274 0 0007 h 9 11 53 h 9 Geometric albedo0 029 0 003 8 6 0 043 0 002 7 0 0458 derived 3 0 0504 0 0126 5 0 0600 0 005 4 Spectral typeP 5 C 3 Absolute magnitude H 9 8 4 5 7 10 1 1 3 8 10 15 0 24 10 Contents 1 Orbit 2 Lightcurve 3 Spectra diameter and albedo 4 Naming 5 References 6 External linksOrbit editAngola orbits the Sun in the outer main belt at a distance of 2 7 3 6 AU once every 5 years and 8 months 2 058 days Its orbit has an eccentricity of 0 15 and an inclination of 19 with respect to the ecliptic 1 Angola was first identified as 1929 GC at Johannesburg in 1929 extending the body s observation arc by 6 years prior to its official discovery observation 11 Lightcurve editIn July 2003 French amateur astronomer Rene Roy obtained a rotational lightcurve of Angola It gave a well defined rotation period of 11 5274 hours with a brightness variation of 0 38 magnitude U 3 9 Photometric observations by ESO s CCD specialist Cyril Cavadore gave an identical period of 11 53 hours with an insufficient amplitude of 0 02 magnitude U 1 9 Spectra diameter and albedo editAccording to the surveys carried out by the Infrared Astronomical Satellite IRAS the Japanese Akari satellite and NASA s Wide field Infrared Survey Explorer WISE with its subsequent NEOWISE mission Angola measures between 59 48 and 70 07 kilometers in diameter and its surface has an albedo between 0 029 and 0 060 4 6 7 8 The Collaborative Asteroid Lightcurve Link derives an albedo of 0 0458 and a diameter of 59 31 kilometers based on an absolute magnitude of 10 1 3 The carbonaceous C type asteroid is also classified a dark P type by WISE 5 Naming editThis minor planet is named for Angola the state on the southwestern coast of Africa 2 The approved naming citation was published by the Minor Planet Center on 1 February 1980 M P C 5183 12 References edit a b c d JPL Small Body Database Browser 1712 Angola 1935 KC 2017 03 21 last obs Jet Propulsion Laboratory Retrieved 1 July 2017 a b c Schmadel Lutz D 2007 1712 Angola Dictionary of Minor Planet Names 1712 Angola Springer Berlin Heidelberg p 136 doi 10 1007 978 3 540 29925 7 1713 ISBN 978 3 540 00238 3 a b c d e f g LCDB Data for 1712 Angola Asteroid Lightcurve Database LCDB Retrieved 22 December 2016 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 12 IRAS A FPA 3 RDR IMPS V6 0 Bibcode 2004PDSS 12 T Retrieved 22 October 2019 a b c d e 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 a b c 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 22 December 2016 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 c d 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 Retrieved 22 December 2016 a b c d Behrend Raoul Asteroids and comets rotation curves 1712 Angola Geneva Observatory Retrieved 22 December 2016 Veres Peter Jedicke Robert Fitzsimmons Alan Denneau Larry Granvik Mikael Bolin Bryce et al November 2015 Absolute magnitudes and slope parameters for 250 000 asteroids observed by Pan STARRS PS1 Preliminary results Icarus 261 34 47 arXiv 1506 00762 Bibcode 2015Icar 261 34V doi 10 1016 j icarus 2015 08 007 Retrieved 22 December 2016 a b 1712 Angola 1935 KC Minor Planet Center Retrieved 22 December 2016 MPC MPO MPS Archive Minor Planet Center Retrieved 22 December 2016 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 1712 Angola at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 1712 Angola at the JPL Small Body Database nbsp Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 1712 Angola amp oldid 1191751821, wikipedia, wiki, book, books, library,

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