2423 Ibarruri

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2423 Ibarruri
Discovery [1]
Discovered by L. Zhuravleva
Discovery site CrAO - Nauchnyj
Discovery date 14 July 1972
Designations
MPC designation 2423 Ibarruri
Named after
Rubén Ibárruri
(Hero of the Soviet Union)[2]
1972 NC · 1930 SV
1943 TB · 1956 VC
1972 PB
Mars crosser[3]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 59.36 yr (21682 days)
Aphelion 2.8082 AU (420.10 Gm)
Perihelion 1.5695 AU (234.79 Gm)
2.1889 AU (327.45 Gm)
Eccentricity 0.28295
3.24 yr (1182.8 d)
133.18°
0° 18m 15.66s / day
Inclination 4.0559°
265.15°
80.218°
Earth MOID 0.566985 AU (84.8197 Gm)
Jupiter MOID 2.62146 AU (392.165 Gm)
Jupiter Tisserand parameter 3.618
Physical characteristics
Dimensions 6.50 km (calculated)[3]
139.79 h[a]
139.92±0.01 h[4]
73.08±0.10 h[5]
139.9±0.2 h[6]
0.20 (assumed)[3]
SMASS = A[7]
C[3]
13.3

2423 Ibarruri, provisional designation 1972 NC, is an eccentric, slow tumbling asteroid and Mars-crosser from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered by Russian–Ukrainian female astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj, on 14 July 1972.[8]

The spectral type of the asteroid is that of a rare A-type in the SMASS taxonomy, with its surface consisting of almost pure olivine, which gives the body a very reddish color. As of November 2015, only 17 minor planets of this type are known.[9] It orbits the Sun at a distance of 1.6–2.8 AU once every 3 years and 3 months (1,182 days). Its orbit shows a high eccentricity of 0.28 and an inclination of 4 degrees towards the plane of the ecliptic.

Ibarruri has a notably slow rotation period of 140 hours,[a][6] and seems to be in a non-principal axis rotation (NPAR), colloquially called as "tumbling".[10] As a spectroscopic A-type asteroid, it belongs to the larger group of bodies with a silicaceous composition. However, the Collaborative Asteroid Lightcurve Link classifies the asteroid into the carbonaceous group, despite the fact that is assumes a relatively high geometric albedo of 0.20,[3] which is rather typical for stony asteroids.

The minor planet was named after Rubén Ruiz Ibárruri (1920–1942), son of Spanish communist leader Dolores Ibárruri and a posthumous Hero of the Soviet Union. He enlisted in the Soviet army and died in the early stage of the Battle of Stalingrad in September 1942.[2]

References[edit]

  1. ^ a b Pravec (2011) web: rotation period 139.79±0.04 hours with a brightness amplitude of 0.74 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2423) Ibarruri
  1. ^ a b "JPL Small-Body Database Browser: 2423 Ibarruri (1972 NC)" (2015-10-23 last obs.). Jet Propulsion Laboratory. Retrieved 15 April 2016. 
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2423) Ibarruri. Springer Berlin Heidelberg. p. 198. ISBN 978-3-540-29925-7. Retrieved November 2015. 
  3. ^ a b c d e "LCDB Data for (2423) Ibarruri". Asteroid Lightcurve Database (LCDB). Retrieved November 2015. 
  4. ^ Ferrero, Andrea (April 2012). "Lightcurve Determination at the Bigmuskie Observatory from 2011 July-December". The Minor Planet Bulletin 39 (2): 65–67. Bibcode:2012MPBu...39...65F. ISSN 1052-8091. Retrieved November 2015. 
  5. ^ Vander Haagen; Gary A. (April 2012). "Lightcurves of 724 Hapag, 2423 Ibarruri, 4274 Karamanov 4339 Almamater, and 5425 Vojtech.". The Minor Planet Bulletin 39 (2): 48–50. Bibcode:2012MPBu...39...48V. ISSN 1052-8091. Retrieved November 2015. 
  6. ^ a b Buchheim, Robert K. (October 2012). "Lightcurves of 2423 Ibarruri and 8345 Ulmerspatz". The Minor Planet Bulletin 39 (4): 209–211. Bibcode:2012MPBu...39..209B. ISSN 1052-8091. Retrieved November 2015. 
  7. ^ Xu, Shui; Binzel, Richard P.; Burbine, Thomas H.; Bus, Schelte J. (May 1995). "Small main-belt asteroid spectroscopic survey: Initial results". Icarus: 1–35. Bibcode:1995Icar..115....1X. doi:10.1006/icar.1995.1075. ISSN 0019-1035. Retrieved November 2015. 
  8. ^ "2423 Ibarruri (1972 NC)". Minor Planet Center. Retrieved November 2015. 
  9. ^ "JPL Small-Body Database Search Engine: spec. type = A (SMASSII)". JPL Solar System Dynamics. Retrieved November 2015. 
  10. ^ Pravec, P.; Scheirich, P.; Durech, J.; Pollock, J.; Kusnirák, P.; Hornoch, K.; et al. (May 2014). "The tumbling spin state of (99942) Apophis". Icarus 233: 48–60. Bibcode:2014Icar..233...48P. doi:10.1016/j.icarus.2014.01.026. Retrieved November 2015. 

External links[edit]