astro.wikisort.org - Asteroid

8013 Gordonmoore, provisional designation 1990 KA, is an eccentric, stony asteroid and near-Earth object of the Apollo group, approximately 1–2 kilometers in diameter.

8013 Gordonmoore

Discovery [1]
Discovered by	E. F. Helin
Discovery site	Palomar Obs.
Discovery date	18 May 1990
Designations
MPC designation	(8013) Gordonmoore
Named after	Gordon Moore (Intel co-founder)[2]
Alternative designations	1990 KA
Minor planet category	NEO · Amor [1][3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	64.90 yr (23,703 days)
Earliest precovery date	1 September 1951
Aphelion	3.1498 AU
Perihelion	1.2503 AU
Semi-major axis	2.2000 AU
Eccentricity	0.4317
Orbital period (sidereal)	3.26 yr (1,192 days)
Mean anomaly	126.01°
Mean motion	0° 18m 7.2s / day
Inclination	7.5685°
Longitude of ascending node	105.57°
Argument of perihelion	146.73°
Earth MOID	0.2472 AU · 96.3 LD
Physical characteristics
Dimensions	1.04 km (derived)[4] 2.3 km[1]
Synodic rotation period	6 h (dated)[5] 8.40±0.01 h[6]
Geometric albedo	0.20 (assumed)[4]
Spectral type	S [4]
Absolute magnitude (H)	16.67±0.2 (R)[4] · 16.9[1] · 17.26±0.149[7] · 17.26[4] · 17.27±0.15[8]

The asteroid was discovered on 18 May 1990, by American astronomer Eleanor Helin at Palomar Observatory in California, United States.[3] It was named after Intel co-founder Gordon Moore.[2]

Orbit and classification

Gordonmoore orbits the Sun at a distance of 1.3–3.1 AU once every 3 years and 3 months (1,192 days). Its orbit has an eccentricity of 0.43 and an inclination of 8° with respect to the ecliptic.[1]

It has a minimum orbit intersection distance with Earth of 0.2472 AU (37,000,000 km), or 96.3 lunar distance. Due to its eccentric orbit, Gordonmoore is also Mars-crosser. In 2127, the asteroid will pass the Red Planet within 0.02776 AU (4,150,000 km).[1]

A first precovery was taken at the discovering Palomar Observatory in 1951, extending the body's observation arc by 39 years prior to its official discovery observation.[3]

Physical characteristics

Rotation period

In April 2016, a rotational lightcurve of Gordonmoore was obtained from photometric observations by astronomer Brian Warner at the Palmer Divide Station (716) in Colorado. It gave a rotation period of 8.40 hours with a brightness variation of 0.25 magnitude. Lightcurve analysis also gave an alternative period solution of 4.19 hours with an amplitude of 0.25 magnitude. (U=2).[6] The results supersede a previous observations made at the Hoher List Observatory in Germany, that gave a shorter period of 6 hours (U=1).[5]

Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.04 kilometers with an absolute magnitude of 17.26.[4] In the 1990s, Tom Gehrels estimated the body's diameter to be 2.3 kilometers, assuming an albedo of 0.15.[1]

Naming

This minor planet was named in honour of American entrepreneur and billionaire, Gordon Moore (born 1929), co-founder of Intel, known for his revolutionary vision of the future of computers, and author of Moore's law. As a philanthropist, Moore has supported research and education all his life.[2] The official naming citation was published by the Minor Planet Center on 26 May 2002 (M.P.C. 45747).[9]

References

External links

• Hazards due to Comets and Asteroids (1994)
• 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
• 8013 Gordonmoore at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 8013 Gordonmoore at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• 8013 Gordonmoore at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (8013) Gordonmoore

(8013) Gordonmoore ist ein erdnaher Asteroid des Amor-Typs, der am 18. Mai 1990 von der amerikanischen Astronomin Eleanor Helin am Palomar-Observatorium (IAU-Code 675) entdeckt wurde.

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- [en] 8013 Gordonmoore

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[ru] (8013) Гордонмур

(8013) Гордонмур (лат. Gordon Moore) — околоземный астероид из группы Амура (III), который был открыт 18 мая 1990 года американским астрономом Элеанорой Хелин в Паломарской обсерватории и назван в честь Гордона Мура, основателя корпорации Intel [1].

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