astro.wikisort.org - Asteroid

1490 Limpopo, provisional designation 1936 LB, is a carbonaceous–metallic asteroid from the inner regions of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 14 June 1936, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa.[13] It was named for the Limpopo River.[2]

1490 Limpopo

Lightcurve based 3D-model of Limpopo
Discovery[1]
Discovered by	C. Jackson
Discovery site	Johannesburg Obs.
Discovery date	14 June 1936
Designations
MPC designation	(1490) Limpopo
Named after	Limpopo River[2]
Alternative designations	1936 LB · 1931 BL 1937 WJ · 1937 YK 1947 ND · 1965 OD
Minor planet category	main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	85.81 yr (31,341 days)
Aphelion	2.7182 AU
Perihelion	1.9869 AU
Semi-major axis	2.3525 AU
Eccentricity	0.1554
Orbital period (sidereal)	3.61 yr (1,318 days)
Mean anomaly	63.865°
Mean motion	0° 16m 23.16s / day
Inclination	10.020°
Longitude of ascending node	254.27°
Argument of perihelion	90.817°
Physical characteristics
Dimensions	14.844±0.112[4] 16.358±0.045 km[5] 18.55 km (derived)[3] 18.58±1.4 km[6] 19.35±0.27 km[7] 20.21±0.36 km[8]
Synodic rotation period	6.15±0.1 h[9] 6.426±0.003 h[10] 6.647±0.004 h[11]
Geometric albedo	0.068±0.011[7][4] 0.069±0.003[8] 0.0742 (derived)[3] 0.0811±0.014[6] 0.1048±0.0332[5]
Spectral type	SMASS = Xc[1] · M[5] · X[3]
Absolute magnitude (H)	11.33±0.82[12] · 12.0[5][6][8] · 12.1[1][3][7]

Orbit

Limpopo orbits the Sun in the inner main-belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,318 days). Its orbit has an eccentricity of 0.16 and an inclination of 10° with respect to the ecliptic.[1] The body's observation arc begins 2 weeks prior to its official discovery observation. Its first identification as 1931 BL at Lowell Observatory in 1931 remains unused.[13]

Rotation period

Between August and November 2005, three rotational lightcurves of Limpopo were obtained from photometric observations by French amateur astronomer Laurent Bernasconi, Pedro Sada at the Mexican Monterrey Observatory, and Dicy Saylor at University of Georgia, United States. The lightcurves gave a rotation period between 6.15 and 6.647 hours with a brightness variation of 0.15–0.26 magnitude (U=2-/3/3).[9][10][11]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Limpopo measures between 14.84 and 20.21 kilometers in diameter and its surface has an albedo between 0.068 and 0.105.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0742 and a diameter of 18.55 kilometers based on an absolute magnitude of 12.1.[3] The X-type asteroid is also classified as a metallic M-type by WISE and as a carbonaceous intermediate Xc-type in the SMASS taxonomy.[1][5]

Naming

This minor planet was named after the Limpopo River, which rises in central southern Africa, and flows through Botswana, Mozambique, South Africa and Zimbabwe into the Indian Ocean.[2] The official naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909).[14]

References

External links

• 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
• 1490 Limpopo at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1490 Limpopo at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1490) Limpopo

(1490) Limpopo ist ein Asteroid des Hauptgürtels, der am 14. Juni 1936 vom südafrikanischen Astronomen Cyril V. Jackson in Johannesburg entdeckt wurde.

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- [en] 1490 Limpopo

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[ru] (1490) Лимпопо

(1490) Лимпопо (лат. Limpopo) — типичный астероид главного пояса, который был открыт 14 июня 1936 года южноафриканским астрономом Сирилом Джексоном в обсерватории Йоханнесбурга и был назван в честь африканской реки Лимпопо[1].

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