astro.wikisort.org - Asteroid

Cora (minor planet designation: 504 Cora), provisional designation 1902 LK, is a metallic asteroid from the middle region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered by American astronomer Solon Bailey at Harvard's Boyden Station in Arequipa, Peru, on 30 June 1902.[15] It was later named after Cora, a figure in Inca mythology.[2]

504 Cora

Discovery [1]
Discovered by	S. I. Bailey
Discovery site	Boyden Stn.(Arequipa)
Discovery date	30 June 1902
Designations
MPC designation	(504) Cora
Named after	Mama Qura, second queen of the Kingdom of Cuzco[2]
Alternative designations	1902 LK · 1947 OH
Minor planet category	main-belt · (middle)
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	110.44 yr (40,337 days)
Aphelion	3.3127 AU
Perihelion	2.1296 AU
Semi-major axis	2.7212 AU
Eccentricity	0.2174
Orbital period (sidereal)	4.49 yr (1,640 days)
Mean anomaly	147.01°
Mean motion	0° 13m 10.56s / day
Inclination	12.888°
Longitude of ascending node	104.63°
Argument of perihelion	247.92°
Physical characteristics
Dimensions	27.19±1.00 km[3] 29.06 km (derived)[4] 30.02±2.3 km (IRAS:40)[5] 30.39±0.35 km[6] 30.438±0.298[7] 34.994±0.490 km[8]
Synodic rotation period	7.588±0.003 h[9] 7.5882±0.0043 h[10] 7.591±0.001 h[11] 7.5915±0.0043[10] 24.06 h (dated)[12]
Geometric albedo	0.1908 (derived)[4] 0.239±0.032[3][7] 0.2509±0.0553[8] 0.336±0.010[6] 0.3407±0.058 (IRAS:40)[5]
Spectral type	SMASS = X [1] · M [8][13] · X [4]
Absolute magnitude (H)	9.4[5][6][8] · 9.776±0.001 (R)[10] · 9.858±0.001 (R)[10] · 10.00[3] · 10.07±0.35[14] · 10.1[1][4]

Classification and orbit

Cora orbits the Sun in the middle main-belt at a distance of 2.1–3.3 AU once every 4 years and 6 months (1,640 days). Its orbit has an eccentricity of 0.22 and an inclination of 13° with respect to the ecliptic.[1] The body's observation arc begins 4 years after its discovery with the first used observation made at Heidelberg in 1906.[15]

Physical characteristics

Spectral type

On the Tholen taxonomic scheme, as well as by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Cora is classified as a metallic M-type asteroid.[8][13]

Mineralogic observations in the near-infrared with the NASA IRTF telescope using its SpeX spectrograph, showed that its surface is that of an X-type asteroid, with absorption features indicating the presence of pyroxene minerals.[13] In 2004, the body's spectrum was also obtained in the SMASSII survey at the U.S. MDM Observatory, Kitt Peak, Arizona.[16]

Rotation period

Several rotational lightcurves of Cora were obtained for this asteroid by astronomers Maria A. Barucci, David Higgins, Axel Martin, and the Palomar Transient Factory. With one exception,[12] they all gave a rotation period close to 7.59 hours.[11][10] Among these, David Higgins' observation made in September 2010, at the Hunters Hill Observatory (E14) in Ngunnawal, Australia – gave the best rated lightcurve with a period of 7.588±0.003 hours and a brightness variation of 0.20 magnitude (U=3-).[9]

Diameter and albedo

According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's WISE telescope with its subsequent NEOWISE mission, Cora's surface has a high albedo between 0.239 and 0.341. Combined with their respective absolute magnitudes, this results in a diameter estimate of 27.2 to 35.0 kilometers.[3][5][6][7][8] In contrast, the Collaborative Asteroid Lightcurve Link derives a much lower albedo of 0.19 and a diameter of 29.1 kilometers, based on an absolute magnitude of 10.1.[4]

Naming

This minor planet was named after Cora, a figure in Inca mythology (AN 169).[2][17]

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

На других языках

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[de] (504) Cora

(504) Cora ist ein Asteroid des Hauptgürtels, der am 30. Juni 1902 von Solon Irving Bailey entdeckt wurde.

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- [en] 504 Cora

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[es] (504) Cora

(504) Cora es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Solon Irving Bailey el 30 de junio de 1902 desde el observatorio Boyden de Arequipa, Perú.

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[ru] (504) Кора

(504) Кора (англ. Cora) — астероид главного пояса, который принадлежит к спектральному классу X. Он был открыт 30 июня 1902 года американским астрономом Солоном Бэйли в Арекипской обсерватории. Назван в честь героини мифологии инков[1].

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