astro.wikisort.org - Asteroid

2423 Ibarruri, provisional designation 1972 NC, is an eccentric, tumbling and rare-type asteroid, classified as slow rotator and sizable Mars-crosser from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.

2423 Ibarruri

Discovery [1]
Discovered by	L. Zhuravleva
Discovery site	Crimean Astrophysical Obs.
Discovery date	14 July 1972
Designations
MPC designation	(2423) Ibarruri
Named after	Rubén Ibárruri (Hero of the Soviet Union)[2]
Alternative designations	1972 NC · 1930 SV 1943 TB · 1956 VC 1972 PB
Minor planet category	Mars-crosser [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	60.59 yr (22,129 days)
Aphelion	2.8068 AU
Perihelion	1.5702 AU
Semi-major axis	2.1885 AU
Eccentricity	0.2825
Orbital period (sidereal)	3.24 yr (1,183 days)
Mean anomaly	315.42°
Inclination	4.0571°
Longitude of ascending node	264.96°
Argument of perihelion	80.645°
Physical characteristics
Dimensions	4.899±1.085[5] 6.50 km (calculated)[3]
Synodic rotation period	73.08±0.10 h[6] 139.79±0.04 h[lower-alpha 1] 139.9±0.2 h[7] 139.92±0.01 h[8]
Geometric albedo	0.20 (assumed)[3] 0.330±0.167[5]
Spectral type	SMASS = A [1][9] L [10] · S [11] · C [3]
Absolute magnitude (H)	13.3[1] · 13.44±1.15[10] · 13.20[11] · 13.3[3]

The asteroid was discovered by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj, on 14 July 1972.[4] It was named after Spanish communist Rubén Ruiz Ibárruri.[2]

Orbit and classification

Ibarruri orbits the Sun in the inner main-belt at a distance of 1.6–2.8 AU once every 3 years and 3 months (1,183 days). Its orbit has an eccentricity of 0.28 and an inclination of 4° with respect to the ecliptic.[1]

Physical characteristics

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.[12]

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.

Slow rotator and tumbler

Ibarruri has a notably slow rotation period of 140 hours,[lower-alpha 1][7] and seems to be in a non-principal axis rotation (NPAR), colloquially called as "tumbling".[13]

Naming

This 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] The official naming citation was published by the Minor Planet Center on 8 February 1982 (M.P.C. 6649).[14]

Notes

References

External links

• Ondrejov Asteroid Photometry Project
• Asteroid 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 Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2423 Ibarruri at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2423 Ibarruri at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (2423) Ibarruri

(2423) Ibarruri (1972 NC; 1930 SV; 1943 TB; 1956 VC; 1972 PB) ist ein ungefähr fünf Kilometer großer Asteroid des inneren Hauptgürtels, der am 14. Juli 1972 von der ukrainischen (damals: Sowjetunion) Astronomin Ljudmyla Schurawlowa am Krim-Observatorium (Zweigstelle Nautschnyj) auf der Halbinsel Krim (IAU-Code 095) entdeckt wurde.

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- [en] 2423 Ibarruri

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[ru] (2423) Ибаррури

(2423) Ибаррури (лат. Ibarruri) — небольшой астероид, который относится к группе астероидов пересекающих орбиту Марса и принадлежащий к редкому спектральному классу A. Он был открыт 14 июля 1972 года советским астрономом Людмилой Журавлёвой в Крымской обсерватории и назван в честь Героя Советского Союза испанского коммуниста Рубена Ибаррури[1].

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