8013 Gordonmoore

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8013 Gordonmoore
Discovery [1]
Discovered by E. F. Helin
Discovery site Palomar Obs.
Discovery date 18 May 1990
MPC designation (8013) Gordonmoore
Named after
Gordon Moore
1990 KA
Amor · NEO · Mars-crosser
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 64.90 yr (23,703 days)
Aphelion 3.1494 AU
Perihelion 1.2503 AU
2.1999 AU
Eccentricity 0.4316
3.26 yr (1,192 days)
0° 18m 7.56s / day
Inclination 7.5683°
Earth MOID 0.2471 AU
Physical characteristics
Dimensions 1.04 km (derived)[3]
2.3 km[1]
6 h[4]
8.40±0.01 h[3]
0.20 (assumed)[3]
16.67±0.2 (R)[3] · 16.9[1] · 17.26±0.149[5] · 17.26[3] · 17.27±0.15[6]

8013 Gordonmoore, provisional designation 1990 KA, is an eccentric, stony asteroid, classified as Amor asteroid and near-Earth object, roughly 1–2 kilometers in diameter. It was discovered on 18 May 1990, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California.[7]

The S-type asteroid 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] With a minimum orbit intersection distance with Earth of 0.2467 AU (37,000,000 km), the asteroid is only slightly above the threshold limit of 0.24 AU to become a potentially hazardous object. Due to its eccentric orbit, it is also Mars-crosser. It will pass the Red Planet within 0.02776 AU (4,153,000 km) in 2127.[1] The first precovery was taken at the discovering Palomar Obsevatory in 1951, extending the asteroid's observation arc by 39 years prior to its discovery.[7]

In April 2016, a rotational light-curve was obtained for this asteroid from photometric observations by astronomer Brian D. Warner at the Palmer Divide Station in Colorado. It gave a rotation period of 8.40±0.01 hours with a brightness variation of 0.25 in magnitude (U=2), superseding a previous result from the Hoher List Observatory, Germany, that gave a period of 6 hours (U=1).[4]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.04 kilometers, based on an absolute magnitude of 17.26.[3] In the 1990s, Tom Gehrels estimated the body's diameter to be 2.3 kilometers, assuming an albedo of 0.15.[1]

The minor planet was named in honour of American entrepreneur and billionaire, Gordon Moore (b. 1929), co-founder of Intel, renowned for his revolutionary vision of the future of computers, and author of Moore's law. As a philanthropist, he has supported research and education all his life.[2] Naming citation was published on 26 May 2002 (M.P.C. 45747).[8]


  1. ^ a b c d e f g "JPL Small-Body Database Browser: 8013 Gordonmoore (1990 KA)" (2016-07-24 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (8013) Gordonmoore. Springer Berlin Heidelberg. p. 628. ISBN 978-3-540-00238-3. Retrieved 11 August 2016. 
  3. ^ a b c d e f g "LCDB Data for (8013) Gordonmoore". Asteroid Lightcurve Database (LCDB). Retrieved 11 August 2016. 
  4. ^ a b Hoffmann, M. (March 1991). "Photometry of 1990 KA". The Minor Planet Bulletin. 18: 10. Bibcode:1991MPBu...18...10H. Retrieved 11 August 2016. 
  5. ^ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 11 August 2016. 
  6. ^ Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 11 August 2016. 
  7. ^ a b "8013 Gordonmoore (1990 KA)". Minor Planet Center. Retrieved 11 August 2016. 
  8. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 11 August 2016. 

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