astro.wikisort.org - Asteroid

1994 Shane, provisional designation 1961 TE, is a dark Adeonian asteroid from the central region of the asteroid belt, approximately 25 kilometers in diameter.

1994 Shane

Discovery[1]
Discovered by	Indiana University (Indiana Asteroid Program)
Discovery site	Goethe Link Obs.
Discovery date	4 October 1961
Designations
MPC designation	(1994) Shane
Named after	C. Donald Shane[2] (American astronomer)
Alternative designations	1961 TE · 1939 RN
Minor planet category	main-belt · (middle) [3] Adeona[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	77.64 yr (28,358 days)
Aphelion	3.2332 AU
Perihelion	2.1282 AU
Semi-major axis	2.6807 AU
Eccentricity	0.2061
Orbital period (sidereal)	4.39 yr (1,603 days)
Mean anomaly	298.87°
Mean motion	0° 13m 28.56s / day
Inclination	10.217°
Longitude of ascending node	244.73°
Argument of perihelion	89.669°
Physical characteristics
Dimensions	17.91±0.93 km[5] 25.00 km (derived)[3] 25.15±0.6 km (IRAS:19)[6]
Synodic rotation period	8 h[7] 8.220±0.001 h[8]
Geometric albedo	0.0340 (derived)[3] 0.0640±0.003 (IRAS:19)[6] 0.129±0.014[5]
Spectral type	S[3]
Absolute magnitude (H)	11.6[5][6] · 11.81±0.86[9] · 12.3[1][3]

It was discovered on 4 October 1961, by astronomers of the Indiana Asteroid Program conducted at the Goethe Link Observatory near Brooklyn, Indiana, United States.[10] It was later named after American astronomer C. Donald Shane.[2]

Orbit and classification

Shane is a member of the Adeona family (505), a large family of carbonaceous asteroids.[4]

The asteroid orbits the Sun in the intermediate main belt at a distance of 2.1–3.2 AU once every 4 years and 5 months (1,603 days). Its orbit has an eccentricity of 0.21 and an inclination of 10° with respect to the ecliptic.[1] It was first identified as 1939 RN at Simeiz Observatory in 1939, extending Shane's observation arc by 22 years prior to its official discovery observation at Goethe.[10]

Lightcurve

In October 2009, a rotational lightcurve of Shane was obtained from photometric observations at the Via Capote Observatory (G69) in California. It gave a well-defined rotation period of 8.22 hours with a brightness variation of 0.26 magnitude (U=3),[8] superseding a previously obtained period of 8 hours from 1996 (U=n.a.).[7]

Diameter and albedo

According to observations made by the Infrared Astronomical Satellite IRAS, Shane has an albedo of 0.06,[6] while the survey carried out by the Japanese Akari satellite rendered a higher albedo of 0.13 with a corresponding diameter of 18 kilometers.[5] The Collaborative Asteroid Lightcurve Link derives an even lower albedo of 0.04, yet does not classify it as a carbonaceous but rather as a S-type asteroid, which typically have much higher albedos due to their stony surface composition.[3]

Naming

This minor planet was named after American astronomer Charles Donald Shane (1895–1983), director of Lick Observatory, second president of AURA, and instrumental for the establishment of the Cerro Tololo Inter-American Observatory in Chile.

Shane played a major role in the planning and construction of the first telescopes and buildings on Kitt Peak National Observatory as well.[2] The 3-meter C. Donald Shane telescope, located at Lick Observatory, was also named after him. The approved naming citation was published by the Minor Planet Center on 1 March 1981 (M.P.C. 5848).[11]

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
• 1994 Shane at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1994 Shane at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1994) Shane

(1994) Shane (1961 TE; 1939 RN) ist ein Asteroid des Hauptgürtels, der am 4. Oktober 1961 im Goethe-Link-Observatorium entdeckt wurde.

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- [en] 1994 Shane

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